CN111453915B - Wastewater concentration system and method based on air humidification and dehumidification - Google Patents
Wastewater concentration system and method based on air humidification and dehumidification Download PDFInfo
- Publication number
- CN111453915B CN111453915B CN202010420964.7A CN202010420964A CN111453915B CN 111453915 B CN111453915 B CN 111453915B CN 202010420964 A CN202010420964 A CN 202010420964A CN 111453915 B CN111453915 B CN 111453915B
- Authority
- CN
- China
- Prior art keywords
- tower
- air
- water
- pipeline
- humidifying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 106
- 238000007791 dehumidification Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 145
- 238000009826 distribution Methods 0.000 claims abstract description 92
- 239000007788 liquid Substances 0.000 claims abstract description 76
- 239000010410 layer Substances 0.000 claims description 37
- 238000012856 packing Methods 0.000 claims description 24
- 239000011148 porous material Substances 0.000 claims description 24
- 239000007789 gas Substances 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 15
- 239000000945 filler Substances 0.000 claims description 10
- 150000002500 ions Chemical class 0.000 claims description 8
- 239000007791 liquid phase Substances 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 7
- 239000012071 phase Substances 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 5
- 239000002440 industrial waste Substances 0.000 claims description 5
- 239000002918 waste heat Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 9
- 239000012141 concentrate Substances 0.000 description 11
- 238000001704 evaporation Methods 0.000 description 11
- 230000008020 evaporation Effects 0.000 description 10
- 239000012528 membrane Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 238000009835 boiling Methods 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Drying Of Gases (AREA)
Abstract
The invention relates to a wastewater concentration system based on air humidification and dehumidification, wherein a humidifying tower is provided with a water distributor, a packed bed layer and a tower bottom air distribution disc, one end of a concentrated solution circulating pipeline is communicated with the water distributor in a connecting way, the other end of the concentrated solution circulating pipeline is communicated with a cold side heat exchange port B in a connecting way, and the concentrated solution circulating pipeline is sequentially connected with a concentrated solution lifting pump, a heat main heat exchanger and a first auxiliary heat exchanger; the dehumidifying tower is provided with a dehumidifying air outlet E, a water distributor and a packed bed layer, one end of a clear liquid circulating pipeline is communicated with the water distributor, the other end of the clear liquid circulating pipeline is communicated with a hot side heat exchange port D, a clear liquid lifting pump, a main heat exchanger and a second auxiliary heat exchanger are sequentially connected to the clear liquid circulating pipeline, one end of an inter-tower pipeline is communicated with the humidifying tower, the other end of the inter-tower pipeline is communicated with the dehumidifying tower, one end of the air circulating pipeline is communicated with the dehumidifying air outlet E of the dehumidifying tower, and the other end of the air circulating pipeline is communicated with a tower bottom air distribution disc of the humidifying tower. The invention has the advantages of low energy consumption in operation, low treatment cost and capability of improving the concentration efficiency of wastewater.
Description
Technical Field
The invention relates to a wastewater concentration system based on air humidification and dehumidification and a concentration method thereof, belongs to the field of wastewater concentration treatment, and particularly relates to innocent treatment of percolate membrane concentrate.
Background
The current widely used method for treating percolate is Membrane Bioreactor (MBR) method, and after biochemical treatment, the percolate enters a nanofiltration/reverse osmosis membrane integrated device for advanced treatment, and the treatment method can produce 10-30% of membrane concentrate. The current methods for membrane concentrate treatment are not numerous, and typical processes are evaporation processes, mainly comprising submerged combustion treatment (SCE) and vapor recompression evaporation (MVR/MVC): the SCE treatment technology is to directly spray high-temperature flue gas generated by burning methane and air into concentrated solution, and heat and evaporate the concentrated solution in a direct contact heat transfer mode. The MVR/MVC treatment technology is an energy-saving technology which utilizes secondary steam and energy thereof generated by an evaporation system per se to do work through compression of a steam compressor and improves heat energy of the secondary steam, so that heat is circularly supplied to a concentrated solution evaporation system, and the external energy demand can be reduced.
The existing evaporation treatment technology needs the concentrated solution to be in a boiling state, so that the concentrated solution needs to be operated under the condition of higher temperature or the condition of reducing the boiling point temperature of the concentrated solution under the condition of keeping a certain vacuum degree, so that a large amount of energy is required to be consumed, the concentration treatment cost is high, and the application of the prior art is limited. The SCE treatment technology can only be applied to landfill sites with garbage anaerobic fermentation capability or disposal sites with natural gas supply conditions, and is limited in application and not promoted. Still some concentration systems utilize hot air pressure swing circulation to concentrate waste water, but this concentration system need be furnished with hot compression unit and expansion unit and go on to the air, also have the operation energy consumption to be high, cause the treatment cost high, the problem that the system concentration treatment efficiency is not high yet.
Moreover, the membrane concentrate often contains extremely high TDS and other pollutants, such as a large amount of chloride ions contained in the membrane concentrate increases the risk of corrosion to equipment at high temperature, and meanwhile, the membrane concentrate also has higher hardness ions, so that the scaling problem is particularly serious under the working condition of severe evaporation, and the equipment has poor running stability.
Disclosure of Invention
The invention aims to provide the wastewater concentration system based on air humidification and dehumidification and the concentration method thereof, which have the advantages of small operation energy consumption, low treatment cost, stable and reliable system operation, no restriction on application and convenience in popularization and application.
The technical scheme for achieving the purpose is as follows: waste water concentration system based on air increases wet, dehumidification, its characterized in that: comprises a humidifying unit, a dehumidifying unit, a dry and wet air circulating unit and a heat exchanging unit;
The humidifying unit is used for concentrating and circulating wastewater and comprises a humidifying tower and a concentrated solution circulating pipeline, wherein the upper part of the humidifying tower is provided with a water distributor, the lower part of the humidifying tower is provided with a tower bottom gas distribution disc, a filler bed layer for increasing the contact area of a liquid phase and a gas phase is arranged between the water distributor and the tower bottom gas distribution disc of the humidifying tower, the lower part of the humidifying tower positioned at the tower bottom gas distribution disc is sequentially provided with a wastewater inlet A and a cold side heat exchange port B downwards, one end of the concentrated solution circulating pipeline is connected and communicated with the water distributor in the humidifying tower, and the other end of the concentrated solution circulating pipeline is connected and communicated with the cold side heat exchange port B;
the dehumidification unit is used for dehumidifying and circulating air and comprises a dehumidification tower and a clear liquid circulating pipeline, wherein the upper part of the dehumidification tower is provided with a water distributor, the top of the dehumidification tower is provided with a dehumidification air outlet E, the lower part of the water distributor of the dehumidification tower is provided with a filler bed layer for increasing the contact area between a liquid phase and a gas phase, the lower part of the dehumidification tower is sequentially provided with a clear liquid inlet C and a hot side heat exchange port D downwards, one end of the clear liquid circulating pipeline is communicated with the water distributor in the dehumidification tower, and the other end of the clear liquid circulating pipeline is communicated with the hot side heat exchange port D;
The dry and wet air circulation unit is used for closed air circulation of the humidifying tower and the dehumidifying tower and comprises an inter-tower fan and an air circulation pipeline, wherein the inter-tower fan is arranged on the inter-tower pipeline, one end of the inter-tower pipeline is communicated with the humidifying tower, the other end of the inter-tower pipeline is communicated with the dehumidifying tower, one end of the air circulation pipeline is communicated with a dehumidifying air outlet E of the dehumidifying tower, and the other end of the air circulation pipeline is communicated with a tower bottom air distribution disc of the humidifying tower;
The heat exchange unit comprises a main heat exchanger, a first auxiliary heat exchanger and a second auxiliary heat exchanger, the concentrated solution circulating pipeline is sequentially connected with a concentrated solution lifting pump, a hot main heat exchanger for step-by-step heat exchange and the first auxiliary heat exchanger, the clear solution circulating pipeline is sequentially connected with a clear solution lifting pump, the main heat exchanger for step-by-step heat exchange and the second auxiliary heat exchanger, waste water in the concentrated solution circulating pipeline and clear solution in the clear solution circulating pipeline perform primary heat exchange in the main heat exchanger, and the concentrated solution circulating pipeline is further connected with a super-concentrated solution discharge pipe at the front side of the hot main heat exchanger.
The other technical scheme for achieving the purpose is as follows: a concentration method of a wastewater concentration system based on air humidification and dehumidification is characterized by comprising the following steps of: adding pretreated wastewater for removing hardness ions in a water body into the lower part of the tower from a water inlet A of a humidifying tower, enabling the wastewater to enter a concentrated solution circulating pipeline from a cold side heat exchange port A of the humidifying tower, adding clear liquid into the lower part of the tower from a clear liquid water inlet C of a dehumidifying tower, and enabling the clear liquid to enter a clear liquid circulating pipeline, wherein the humidifying tower and the dehumidifying tower are in a normal pressure state;
Starting a concentrated solution lifting pump and a clear solution lifting pump, pumping the wastewater to a cold side fluid inlet end of a main heat exchanger by the concentrated solution lifting pump, pumping the clear solution to a hot side fluid inlet end of the main heat exchanger by the clear solution lifting pump, performing primary heat exchange on the wastewater and the clear solution in the main heat exchanger, then sending the wastewater and the clear solution into a first auxiliary heat exchanger, performing secondary heat exchange, and then sending the wastewater and the clear solution into a water distributor at the upper part of a humidifying tower, and sending the clear solution subjected to primary cooling into a second auxiliary heat exchanger, performing secondary cooling, and then sending the clear solution into the water distributor of a dehumidifying tower;
The waste water is distributed to a packed bed layer by a water distributor in a humidifying tower and flows to the bottom of the tower under the action of gravity, dehumidified air in the dehumidifying tower is introduced into a tower bottom air distribution disc of the humidifying tower through an air circulation pipeline to flow upwards, the air carries out mass transfer and heat transfer on the surface of the packed bed layer and the waste water, moisture in the waste water is brought into the air to obtain hot humid air and concentrated solution, the obtained concentrated solution flows to the bottom of the tower and the waste water in the system enter the concentrated solution circulation pipeline to form waste water concentration circulation, the hot humid air in the humidifying tower is pumped into the dehumidifying tower by an inter-tower fan, clear liquid is distributed to the packed bed layer by the water distributor in the dehumidifying tower and flows to the bottom of the tower under the action of gravity, the hot humid air carries out mass transfer and heat transfer on the surface of the packed bed layer and the cooled clear liquid, and gaseous steam in the hot humid air reaches a condensation dew point, the obtained water drops and the air after rising to the top of the tower enter the air circulation pipeline to carry out air dehumidification circulation, and the dehumidified air after the obtained drops enter the air circulation pipeline to enter the bottom of the wet air distribution disc in the humidifying tower through a dehumidifying air outlet E to form dry air circulation.
The invention adopts a humidifying unit, a dehumidifying unit, a dry and wet air circulating unit and a heat exchange unit, wherein the humidifying unit adopts a humidifying tower and a concentrated liquid circulating pipeline communicated with the humidifying tower to continuously concentrate and circulate the waste water, the dehumidifying unit adopts a dehumidifying tower and a clear liquid circulating pipeline communicated with the dehumidifying tower to continuously dehumidify and circulate the wet and hot air entering the tower, filler beds for increasing the contact area between liquid phase and gas phase are arranged in the humidifying tower and the dehumidifying tower, so that the dehumidified air enters the humidifying tower to carry out mass transfer with the waste water on the surface of the filler beds, moisture in the waste water is brought into the air to obtain wet and hot air and concentrated liquid, and the wet and hot air is pumped into the filler beds of the dehumidifying tower by a fan between the towers to carry out mass transfer and heat transfer with the clear liquid, so that the water vapor in the wet air reaches a condensation dew point to separate out the moisture and enters the clear liquid, thereby reducing the heat loss, and most of the heat is transferred into the clear liquid, and then the waste water entering the system is subjected to heat exchange, and the running energy consumption is greatly saved. The invention adopts the independent humidifying tower and dehumidifying tower, does not need to raise the liquid phase temperature, can carry out liquid evaporation under normal pressure working condition and temperature lower than boiling point, improves the concentration efficiency of waste water, has stable and reliable system operation, is not restricted in application, and is convenient for popularization and application. The dry and wet air circulation unit adopts the inter-tower fan and the air circulation pipeline, so that the humidifying tower and the dehumidifying tower form closed dry and wet air circulation, and the wet hot air is continuously pumped into the dehumidifying tower only by adopting the inter-tower fan, so that a thermal compression unit and an expansion unit are not needed, the operation energy consumption is low, and the treatment cost is effectively reduced. The heat exchange unit adopts the main heat exchanger, the first auxiliary heat exchanger and the second auxiliary heat exchanger, the waste water in the concentrated solution circulation pipeline and the clear solution in the clear solution circulation pipeline exchange heat once in the main heat exchanger, the temperature of the waste water is increased, the energy required by heating the waste water is saved, the temperature of the clear solution is reduced, the subsequent cooling step is quicker, the consumption of cooling water is saved, and the evaporation efficiency of the system is improved. The waste water subjected to primary heat exchange enters the auxiliary heat exchanger and is subjected to secondary heat exchange by taking industrial waste/waste heat as a heat source, so that the required temperature of the system is reached, and the operation energy consumption of the system is further reduced. The system and the concentration method have compact and reasonable structure, small operation energy consumption and can reduce the treatment cost.
Drawings
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a wastewater concentration system based on air humidification and dehumidification according to the present invention.
Fig. 2 is a schematic structural view of the water distributor of the present invention.
FIG. 3 is a schematic diagram of a porous water distribution loop of the water distributor of the present invention.
FIG. 4 is a schematic view of the structure of a primary screen hole water distribution plate of the water distributor of the present invention.
FIG. 5 is a schematic diagram of a two-stage mesh distributor plate structure of the distributor of the present invention.
Wherein: 1-humidifying tower, 2-water distributor, 2-1-porous water distribution ring pipe, 2-11-spray header, 2-12-pipe ring, 2-13-middle communicating pipe, 2-first-level sieve mesh water distribution plate, 2-3-second-level sieve mesh water distribution plate, 3-air circulation pipeline, 4-concentrated solution circulation pipeline, 5-clear liquid circulation pipeline, 6-inter-tower pipeline, 7-inter-tower fan, 8-dehumidifying tower, 9-packed bed layer, 10-air distribution disk, 11-bottom air distribution disk, 12-pretreatment unit, 13-cooling tower, 14-filter, 15-concentrated solution lifting pump, 16-super concentrated solution discharge pipe row, 17-second auxiliary heat exchanger, 18-drier, 19-main heat exchanger, 20-clear liquid lifting pump and 21-first auxiliary heat exchanger.
Detailed Description
The invention discloses a wastewater concentration system based on air humidification and dehumidification, which is shown in fig. 1 and comprises a humidification unit, a dehumidification unit, a dry and wet air circulation unit and a heat exchange unit.
As shown in FIG. 1, the humidifying unit is used for concentrating and circulating wastewater, and comprises a humidifying tower 1 and a concentrated solution circulating pipeline 4, wherein the concentrated solution circulating pipeline 4 can adopt economic and widely available pipe fittings of polymeric polymer materials, and can prevent the corrosion of the wastewater, particularly concentrated solution, on system pipelines. As shown in figure 1, the upper part of the humidifying tower 1 is provided with a water distributor 2, the lower part of the humidifying tower 1 is provided with a tower bottom air distribution disc 11, the water distributor 2 can uniformly distribute water to a packing bed layer 9 in the humidifying tower 1, the tower bottom air distribution disc 11 can introduce dehumidified air into the lower part in the humidifying tower 1, the humidifying tower 1 is provided with a packing bed layer 9 used for increasing the contact area of liquid phase and gas phase between the water distributor 2 and the tower bottom air distribution disc 11, the packing bed layer 9 is a plurality of layers arranged in a single layer or at intervals, the packing bed layer 9 is filled with a plurality of pall ring packing materials, or a plurality of raschig ring packing materials, or a plurality of saddle ring packing materials, the contact area of wastewater and flowing air is increased through the packing bed layer 9 filled with a large amount of light structured packing materials, and the water in the wastewater is brought into dry air to concentrate the wastewater. As shown in figure 1, the lower part of a gas distribution disc 11 at the bottom of the humidifying tower 1 is provided with a wastewater inlet A and a cold side heat exchange port B in sequence, the cold side heat exchange port B can be arranged at the bottom of the humidifying tower 1, one end of a concentrated solution circulating pipeline 4 is communicated with a water distributor 2 in the humidifying tower 1, and the other end of the concentrated solution circulating pipeline is communicated with the cold side heat exchange port B, so that wastewater entering the humidifying tower 1 can be concentrated continuously and flows into the bottom of the tower for circulation.
As shown in figure 1, the waste water inlet A of the humidifying tower 1 is connected and communicated with a waste water inlet pipe, the waste water inlet pipe is connected and communicated with a water outlet of a pretreatment unit 12, the pretreatment unit 12 is used for removing hardness ions in waste water and preheating the waste water, the existing methods of regulating pH value, increasing charge or electromagnetism and the like can be adopted for removing calcium and magnesium hardness ions in water, particularly for membrane concentrate, the degradation of calcium and magnesium hardness ions on a treatment system under the condition of high temperature can be better reduced, and the waste water is preheated in the pretreatment stage, so that the temperature of the waste water entering the humidifying tower 1 is 30-40 ℃, and the heat requirement of a concentration system is reduced.
As shown in figure 1, the dehumidifying unit is used for dehumidifying and circulating air, and comprises a dehumidifying tower 8 and a clear liquid circulating pipeline 5, wherein the clear liquid circulating pipeline 5 can be made of a common carbon steel material and is externally coated with a spray coating, and the spray coating is a high-molecular organic coating with high chemical corrosion resistance, high thermal stability and high functional group stability, so that the manufacturing cost of the material can be greatly reduced. As shown in fig. 1, the upper part of the dehumidifying tower 8 is provided with a water distributor 2, the top part of the dehumidifying tower 8 is provided with a dehumidifying air outlet E, the lower part of the water distributor 2 is provided with a packing bed layer 9 for increasing the contact area of liquid phase and gas phase, the packing bed layer 9 in the dehumidifying tower 8 is of a single layer or a plurality of layers arranged at intervals, the packing bed layer 9 is filled with a plurality of pall ring packing, raschig ring packing or saddle ring packing, the contact area of clear liquid and flowing hot humid air is increased by filling a large amount of light structured packing, so that full mass transfer and heat transfer can be performed, when the hot humid air reaches a saturated dew point, gaseous water vapor in the air condenses into liquid water droplets, the gradually increased water droplets flow from the top layer to the bottom layer of the tower body due to the gravity factor, and are accumulated at the bottom of the tower body, and the dehumidified air rises to the top of the tower, and air is subjected to dehumidifying circulation, and dry air is then conveyed into the bottom air distribution disc 11 of the humidifying tower 1 through the dehumidifying air outlet E and the air circulation pipeline 3, so that full mass transfer can be performed, and the liquid evaporation of the invention can be performed under the working condition and the temperature lower than boiling point, a large part of the heat transfer can be performed, and the heat transfer can be performed with the clean heat and the clean waste water, and the heat can be saved, and the heat can be lost at least, and the waste can be consumed and the system can be consumed and heat can be cooled and cooled. As shown in fig. 1, the lower part of a dehumidifying tower 8 is sequentially provided with a clear liquid water inlet C and a hot side heat exchange port D downwards, clear liquid is added into the lower part of the dehumidifying tower 8 through the clear liquid water inlet C so as to meet the operation requirement of a system, the hot side heat exchange port D can be arranged at the bottom of the dehumidifying tower 8, one end of a clear liquid circulating pipeline 5 is communicated with a water distributor 2 in the dehumidifying tower 8, and the other end of the clear liquid circulating pipeline is communicated with the hot side heat exchange port D, so that hot and humid air in the dehumidifying tower 8 is continuously dehumidified.
As shown in figures 1 and 2, the water distributor 2 comprises a porous water distribution ring pipe 2-1 and a first-stage sieve pore water distribution plate 2-2 positioned at the lower part of the porous water distribution ring pipe 2-1, wherein a plurality of spray heads 2-11 are uniformly distributed on the porous water distribution ring pipe 2-1, the number of water outlets on the first-stage sieve pore water distribution plate 2-2 is larger than that of the spray heads 2-11 on the porous water distribution ring pipe 2-1, the annular pipe sieve plate is adopted for carrying out step-by-step water distribution, and fluid from the upper porous water distribution ring pipe 2-1 is pre-distributed on the first-stage sieve pore water distribution plate 2-2, so that the impact speed of fluid to be distributed is effectively slowed down, the flow path area is enlarged, uniform wetting of bed filler is facilitated, meanwhile, the impact load of the fluid on the surface of the filler is reduced, the integrity of the filler is protected, and the characteristics of uniform water distribution, rapidness, strong scaling resistance and the like are realized. As shown in figures 2 and 3, the porous water distribution ring pipe 2-1 comprises at least more than two pipe rings 2-12 and middle communicating pipes 2-13 with different sizes, wherein the pipe rings 2-12 can be round or rectangular, 3-5 rings can be arranged in number of the pipe rings 2-12, the space between the rings is 150-210 mm, each pipe ring 2-12 is communicated with 2-13 through at least two middle communicating pipes, the pipe sections of the middle communicating pipes 2-13 extending outwards are arranged at the joints, the diameter of water outlet holes on the first-stage sieve pore water distribution plate 2-2 is smaller than or equal to the diameter of water outlet holes of the spray header 2-11, and water outlets which can be symmetrically distributed along the axis of the pipe rings 2-12, such as 4-16 water outlets are arranged on each pipe ring 2-12, the water outlet diameter of the spray header 2-11 is 25-30 mm, and the water flows out to the lower-stage sieve pore water distribution plate 2-2 for primary water distribution. The first-class sieve pore water distribution plate 2-2 can adopt matrix type holes, the aperture diameter is 20-25 mm, the pitch is 80-90 mm, and the size of the tower body can be adjusted. As shown in figures 2-4, the water distributor 2 of the invention is also provided with a second-level sieve pore water distribution plate 2-3 positioned at the lower part of the first-level sieve pore water distribution plate 2-2, the first-level sieve pore water distribution plate 2-2 and the second-level sieve pore water distribution plate 2-3 are detachably arranged on the tower, the aperture of the water outlet holes on the second-level sieve pore water distribution plate 2-3 is smaller than that of the water outlet holes on the first-level sieve pore water distribution plate 2-2, the water outlet holes on the second-level sieve pore water distribution plate 2-3 and the water outlet holes on the first-level sieve pore water distribution plate 2-2 are arranged in a staggered manner, the second-level sieve pore water distribution plate 2-3 can adopt matrix type water distribution holes, the aperture of the water distribution plate is 10-15 mm, the hole distance of the water distribution plate is 80-90 mm, the fluid after pre-distribution falls onto the second-level sieve pore water distribution plate 2-3 for secondary water distribution, the fluid distribution after secondary water distribution becomes more uniform, and compared with the first-level water distribution, the fluid flow velocity after secondary water distribution is slower, the fluid flow is finer and the fluid flow is distributed more uniformly, and the fluid mass transfer is favorable for full mass transfer with air.
As shown in fig. 1, the dry and wet air circulation unit is used for closed air circulation of a humidifying tower 1 and a dehumidifying tower 8, and comprises an inter-tower fan 7 and an air circulation pipeline 3, wherein the inter-tower fan 7 is arranged on the inter-tower pipeline 6, one end of the inter-tower pipeline 6 is communicated with the humidifying tower 1, the other end of the inter-tower pipeline 6 is communicated with the dehumidifying tower 8, one inter-tower fan 7 or a plurality of inter-tower fans 7 can be adopted, an air distribution disc 10 is arranged in the dehumidifying tower 8, and the other end of the inter-tower pipeline 6 can be connected to the air distribution disc 10, so that the wet and hot air is continuously pumped into the dehumidifying tower 8 through the inter-tower fan 7. As shown in figure 1, one end of an air circulation pipeline 3 is communicated with a dehumidifying air outlet E of a dehumidifying tower 8, the other end of the air circulation pipeline is communicated with a tower bottom air distribution plate 11, and dry air dehumidified by the dehumidifying tower 8 is introduced into a humidifying tower 1 through the tower bottom air distribution plate 11 to circulate air. The tower bottom gas distribution plate 11 can adopt the existing gas distribution plate, and dehumidified air is uniformly distributed in the humidifying tower 1 through the tower bottom gas distribution plate 11.
As shown in fig. 1, the rear part of an inter-tower fan 7 of the inter-tower pipeline 6 is connected with a plurality of branch pipes connected in parallel, the lower part of a corresponding packed bed layer 9 of a dehumidifying tower 8 is also provided with an air distribution disc 10, the air distribution disc 10 is connected and communicated with the corresponding air distribution disc 10, the wet and hot air is uniformly distributed into the dehumidifying tower 8 through the air distribution disc, the wet and hot air can be continuously pumped into the dehumidifying tower 8 by one inter-tower fan 7, mass transfer and heat transfer are carried out between the dehumidifying tower 8 and clear liquid in each packed bed layer 9, the contact area of the clear liquid and the wet and hot air is further increased, and the evaporating efficiency is improved. The invention has a plurality of inter-tower pipelines 6, 3-10 inter-tower pipelines 6 can be adopted, the corresponding inter-tower fans 7 are arranged on each inter-tower pipeline 6, the lower parts of the corresponding packed beds 9 of the dehumidifying towers 8 are also provided with air distribution plates 10, one ends of the inter-tower pipelines 6 are connected to the humidifying towers at intervals, the other ends of the inter-tower pipelines are connected and communicated with the corresponding air distribution plates 10, the hot and humid air is continuously pumped into the dehumidifying towers 8 through the inter-tower fans 7, and the hot and humid air and clear liquid are subjected to mass transfer and heat transfer in the packed beds 9, so that the evaporation efficiency is improved.
As shown in figure 1, the humidifying tower 1, the dehumidifying tower 8, the concentrated solution circulating pipeline 4, the clear liquid circulating pipeline 5, the air circulating pipeline 3 and the inter-tower pipeline 6 are externally wrapped with heat preservation layers, and the whole set of system waterway pipelines and the tower body are respectively coated with external heat preservation cotton materials, so that the heat loss of the system can be further reduced, and the operation energy consumption is saved.
As shown in FIG. 1, the heat exchange unit comprises a main heat exchanger 19, a first auxiliary heat exchanger 21 and a second auxiliary heat exchanger 17, wherein the main heat exchanger 19, the first auxiliary heat exchanger 21 and the second auxiliary heat exchanger 17 can be plate heat exchangers made of efficient anti-corrosion materials, and compared with the traditional shell-and-tube heat exchangers, the heat exchange unit has the advantages of small occupied area, large heat exchange area, high heat exchange efficiency, easy disassembly and cleaning and the like. As shown in fig. 1, a concentrated solution circulating pipeline 4 is sequentially connected with a concentrated solution lifting pump 15, a hot main heat exchanger 19 and a first auxiliary heat exchanger 21 for step-by-step heat exchange, a clear solution circulating pipeline 5 is sequentially connected with a clear solution lifting pump 20, a main heat exchanger 19 and a second auxiliary heat exchanger 17 for step-by-step heat exchange, a filter 14 can be connected to the concentrated solution circulating pipeline 4 at the front side of liquid inlet of the concentrated solution lifting pump 15, the clear solution circulating pipeline 5 is also connected with the filter 14 at the front side of liquid inlet of the clear solution lifting pump 20, waste water and clear solution are filtered through the respective filters 14, the waste water in the concentrated solution circulating pipeline 4 and the clear solution in the clear solution circulating pipeline 5 are subjected to heat exchange in the main heat exchanger 19, and for the waste water, the waste water is heated and the energy required by heating the waste water is saved; for clear liquid, the temperature of the clear liquid is reduced, and meanwhile, the subsequent cooling step is quicker, so that the consumption of cooling water is saved, and the concentration treatment efficiency of the system is improved. The first auxiliary heat exchanger 21 is communicated with industrial waste/waste heat in a connecting way, and the waste water subjected to primary heat exchange enters the first auxiliary heat exchanger 21 to perform secondary heat exchange with a heat source to reach the required temperature of the system, so that the operation energy consumption of the system is further reduced due to the fact that the industrial waste/waste heat is used as the heat source. The second auxiliary heat exchanger 17 is communicated with condensate water of the cooling water tower 13, clear liquid subjected to primary heat exchange and cooling enters the second auxiliary heat exchanger 17 to be subjected to secondary heat exchange and cooling with the condensate water, the temperature after cooling reaches the temperature of 30-40 ℃ required by system operation, and then the clear liquid is uniformly distributed into the packed bed 9 of the tower body through the water distributor 2 of the dehumidifying tower 8.
As shown in fig. 1, the front side of the main heat exchanger 19 is also connected with a super-concentrated liquid discharge pipe 16, and the super-concentrated liquid is connected with a dryer 18, so that the super-concentrated liquid gathered at the bottom of the humidifying tower 1 can be discharged into the dryer 18 for secondary concentration and drying after passing through a concentrated liquid lifting pump 15, and the salt mud formed after drying is filled into a ton bag with an inner container for backfilling treatment.
According to the invention, the pretreatment unit 12, the humidifying tower 1, the dehumidifying tower 8, the inter-tower fan 7, the main heat exchanger 19, the first auxiliary heat exchanger 21, the second auxiliary heat exchanger 17, the cooling water tower 13, the dryer 18 and valves on various pipelines can realize automatic starting, running and stopping of the wastewater concentration system through the PLC automatic control system, and manual control can be greatly and effectively reduced.
As shown in figure 1, in the concentration method of the wastewater concentration system based on air humidification and dehumidification, wastewater which is pretreated to remove hardness ions in water is added into the lower part of the inside of a tower from the water inlet A of a humidifying tower 1, the wastewater can be percolate or percolate film concentrate and the like, the temperature of the wastewater enters the humidifying tower 1 at 30-40 ℃, the wastewater enters a concentrated solution circulation pipeline 4 from a cold side heat exchange port A of the humidifying tower 1, clear liquid enters the clear liquid circulation pipeline 5 from the clear liquid water inlet C of a dehumidifying tower 8 and enters the clear liquid circulation pipeline 5 from the lower part of the inside of the tower, and the temperature of the clear liquid is 85-95 ℃ and the humidifying tower 1 and the dehumidifying tower 8 are in a normal pressure state.
As shown in figure 1, the concentrated solution lift pump 15 and the clear solution lift pump 20 are started, the waste water is sent to the cold side fluid inlet end of the main heat exchanger 19 by the concentrated solution lift pump 15, the clear solution is sent to the hot side fluid inlet end of the main heat exchanger 19 by the clear solution lift pump 20, the waste water and the clear solution exchange heat once in the main heat exchanger 19, the waste water with the temperature of 30-40 ℃ exchanges heat with the temperature of Wen Qingye with the temperature of 85-95 ℃, the temperature of the waste water after the heat exchange of the main heat exchanger 19 can reach 65-85 ℃, then the waste water enters the first auxiliary heat exchanger 21 and is sent to the water distributor 2 at the upper part of the humidifying tower 1 after the secondary heat exchange, the waste water after the heat exchange of the main heat exchanger 19 can enter the first auxiliary heat exchanger 21 and is subjected to the secondary heat exchange and temperature rise with industrial waste heat/waste heat, the waste water with the temperature reaching the temperature required by the system operation is sent to the top of the humidifying tower 1 by the lift pump, and then the waste water is uniformly distributed to the packed bed 9 of the tower body through the water distributor 2. The temperature of the clear liquid after heat exchange and cooling by the main heat exchanger 19 can reach 55-65 ℃, the clear liquid after primary cooling enters the second auxiliary heat exchanger 17 and enters the water distributor 2 of the dehumidifying tower 8 after secondary cooling, the clear liquid after primary heat exchange and cooling enters the second auxiliary heat exchanger 17 to carry out secondary heat exchange and cooling with condensed water, the temperature reaches 30-40 ℃ required by system operation, then the clear liquid is uniformly distributed into the packed bed 9 by the tower top water distributor 2, and part of clear liquid temperature reaches the range allowing discharge, and the discharging treatment is carried out.
As shown in figure 1, the wastewater of the invention is distributed on a packed bed layer 9 by a water distributor 2 in a humidifying tower 1 and flows to the bottom of the tower under the action of gravity, the dehumidified air in a dehumidifying tower 8 is introduced into a tower bottom air distribution disc 11 of the humidifying tower 1 through an air circulation pipeline 3 to flow upwards, the air carries out mass transfer and heat transfer on the surface of the packed bed layer 9 and the wastewater by convection, the contact area between the wastewater and flowing air is enlarged in the bed layer by a large amount of light structured packing, the moisture in the wastewater is brought into the air to obtain hot and humid air and concentrated solution, the obtained concentrated solution flows to the tower bottom and enters the wastewater in a concentrated solution circulation pipeline 4 to carry out wastewater concentration circulation, and at the moment, the cold and dry air in the humidifying tower 1 is gradually changed into hot and humid air. As shown in figure 1, hot and humid air in a humidifying tower 1 is pumped into a dehumidifying tower 8 by an inter-tower fan 7, cooled clear liquid is distributed onto a packed bed 9 by a water distributor 2 in the dehumidifying tower 8 and flows to the bottom of the tower under the action of gravity, the hot and humid air transfers mass and heat with the cooled clear liquid on the surface of the packed bed 9, the contact area between the clear liquid and flowing air is enlarged in the bed by a large amount of light structured packing, water is separated when gaseous water vapor in the hot and humid air reaches a condensation dew point, water drops are obtained and air after the water drops rise to the top of the tower for dehumidification is obtained, the liquid water drops enter the clear liquid due to condensation of the gaseous water vapor in the air, the obtained water drops flow to the bottom of the tower for dehumidification circulation, the dehumidified air enters an air circulation pipeline 3 from a dehumidifying air outlet E and then enters a bottom air distribution disc 11 in the humidifying tower 1 for forming dry and wet air circulation, and the wastewater is continuously concentrated.
As shown in FIG. 1, the super-concentrated solution accumulated at the bottom of the humidifying tower is discharged from the super-concentrated solution discharge pipe 16 to the dryer 18 through the concentrated solution lifting pump for secondary concentration and drying, and the dried solid is backfilled.
Claims (10)
1. Waste water concentration system based on air increases wet, dehumidification, its characterized in that: comprises a humidifying unit, a dehumidifying unit, a dry and wet air circulating unit and a heat exchanging unit;
The humidifying unit is used for concentrating and circulating wastewater and comprises a humidifying tower and a concentrated solution circulating pipeline, wherein the upper part of the humidifying tower is provided with a water distributor, the lower part of the humidifying tower is provided with a tower bottom gas distribution disc, a filler bed layer for increasing the contact area of a liquid phase and a gas phase is arranged between the water distributor and the tower bottom gas distribution disc of the humidifying tower, the lower part of the humidifying tower positioned at the tower bottom gas distribution disc is sequentially provided with a wastewater inlet A and a cold side heat exchange port B downwards, one end of the concentrated solution circulating pipeline is connected and communicated with the water distributor in the humidifying tower, and the other end of the concentrated solution circulating pipeline is connected and communicated with the cold side heat exchange port B;
The dehumidification unit is used for dehumidifying and circulating air and comprises a dehumidification tower and a clear liquid circulating pipeline, wherein the upper part of the dehumidification tower is provided with a water distributor, the top of the dehumidification tower is provided with a dehumidification air outlet E, the lower part of the water distributor of the dehumidification tower is provided with a filler bed layer for increasing the contact area between a liquid phase and a gas phase, the lower part of the dehumidification tower is sequentially provided with a clear liquid inlet C and a hot side heat exchange port D downwards, one end of the clear liquid circulating pipeline is communicated with the water distributor in the dehumidification tower, and the other end of the clear liquid circulating pipeline is communicated with the hot side heat exchange port D; the water distributor comprises a porous water distribution ring pipe and a first-stage sieve pore water distribution plate positioned at the lower part of the porous water distribution ring pipe, wherein a plurality of spray heads are uniformly distributed on the porous water distribution ring pipe, and the number of water outlets on the first-stage sieve pore water distribution plate is greater than that of the spray heads on the porous water distribution ring pipe; the porous water distribution ring pipe comprises at least more than two pipe rings and middle communicating pipes, wherein the pipe rings are communicated through at least two middle communicating pipes, and pipe sections extending outwards from the middle communicating pipes are arranged at the joints; the water distributor is also provided with a second-level sieve pore water distribution plate positioned at the lower part of the first-level sieve pore water distribution plate, the aperture of water outlets on the second-level sieve pore water distribution plate is smaller than that of water outlets on the first-level sieve pore water distribution plate, and the water outlets on the second-level sieve pore water distribution plate are arranged in a staggered manner with the water outlets on the first-level sieve pore water distribution plate;
The dry and wet air circulation unit is used for closed air circulation of the humidifying tower and the dehumidifying tower and comprises an inter-tower fan and an air circulation pipeline, wherein the inter-tower fan is arranged on the inter-tower pipeline, one end of the inter-tower pipeline is communicated with the humidifying tower, the other end of the inter-tower pipeline is communicated with the dehumidifying tower, one end of the air circulation pipeline is communicated with a dehumidifying air outlet E of the dehumidifying tower, and the other end of the air circulation pipeline is communicated with a tower bottom air distribution disc of the humidifying tower;
The heat exchange unit comprises a main heat exchanger, a first auxiliary heat exchanger and a second auxiliary heat exchanger, the concentrated solution circulating pipeline is sequentially connected with a concentrated solution lifting pump, a hot main heat exchanger for step-by-step heat exchange and the first auxiliary heat exchanger, the clear solution circulating pipeline is sequentially connected with a clear solution lifting pump, the main heat exchanger for step-by-step heat exchange and the second auxiliary heat exchanger, waste water in the concentrated solution circulating pipeline and clear solution in the clear solution circulating pipeline perform primary heat exchange in the main heat exchanger, and the concentrated solution circulating pipeline is further connected with a super-concentrated solution discharge pipe at the front side of the hot main heat exchanger.
2. The air-humidification-based wastewater concentration system of claim 1, wherein: the packing bed layer in the humidifying tower and the packing bed layer in the dehumidifying tower are single layers or multiple layers arranged at intervals, and the packing bed layer is filled with a plurality of pall ring packing, raschig ring packing or saddle ring packing.
3. The air-humidification-based wastewater concentration system of claim 1, wherein: the pipeline between the towers is connected with a plurality of branch pipes connected in parallel at the rear part of the fan between the towers, the dehumidifying tower is also provided with an air distribution disc at the lower part of the corresponding packed bed layer, and the branch pipes are connected and communicated with the air distribution discs corresponding to the branch pipes.
4. The air-humidification-based wastewater concentration system of claim 1, wherein: the tower pipelines are multiple, the lower part of the corresponding packed bed layer of the dehumidifying tower is also provided with air distribution plates, one end of each tower pipeline is connected to the humidifying tower at intervals, and the other end of each tower pipeline is connected to the corresponding air distribution plate.
5. The air-humidification-based wastewater concentration system of claim 1, wherein: the concentrated solution circulating pipeline is connected with a filter at the front side of the liquid inlet of the concentrated solution lifting pump, and the clear solution circulating pipeline is connected with a filter at the front side of the liquid inlet of the clear solution lifting pump.
6. The air-humidification-based wastewater concentration system of claim 1, wherein: the first auxiliary heat exchanger is communicated with industrial waste/waste heat in a connecting way, and the second auxiliary heat exchanger is communicated with condensate water of the cooling water tower.
7. The air-humidification-based wastewater concentration system of claim 1, wherein: the humidifying tower, the dehumidifying tower, the concentrated liquid circulating pipeline, the clear liquid circulating pipeline, the air circulating pipeline and the inter-tower pipeline are all covered with heat preservation layers.
8. The air-humidification-based wastewater concentration system of claim 1, wherein: the waste water inlet A of the humidifying tower is communicated with a waste water inlet pipe, the waste water inlet pipe is communicated with a water outlet of a pretreatment unit, and the pretreatment unit is used for removing hardness ions in waste water and preheating the waste water.
9. The method for concentrating an air-humidification-based wastewater concentration system according to any one of claims 1 to 8, wherein:
Adding pretreated wastewater for removing hardness ions in a water body into the lower part of the tower from a water inlet A of a humidifying tower, enabling the wastewater to enter a concentrated solution circulating pipeline from a cold side heat exchange port A of the humidifying tower, adding clear liquid into the lower part of the tower from a clear liquid water inlet C of a dehumidifying tower, and enabling the clear liquid to enter a clear liquid circulating pipeline, wherein the humidifying tower and the dehumidifying tower are in a normal pressure state;
Starting a concentrated solution lifting pump and a clear solution lifting pump, pumping the wastewater to a cold side fluid inlet end of a main heat exchanger by the concentrated solution lifting pump, pumping the clear solution to a hot side fluid inlet end of the main heat exchanger by the clear solution lifting pump, performing primary heat exchange on the wastewater and the clear solution in the main heat exchanger, then sending the wastewater and the clear solution into a first auxiliary heat exchanger, performing secondary heat exchange, and then sending the wastewater and the clear solution into a water distributor at the upper part of a humidifying tower, and sending the clear solution subjected to primary cooling into a second auxiliary heat exchanger, performing secondary cooling, and then sending the clear solution into the water distributor of a dehumidifying tower;
The waste water is distributed to a packed bed layer by a water distributor in a humidifying tower and flows to the bottom of the tower under the action of gravity, dehumidified air in the dehumidifying tower is introduced into a tower bottom air distribution disc of the humidifying tower through an air circulation pipeline to flow upwards, the air carries out mass transfer and heat transfer on the surface of the packed bed layer and the waste water, moisture in the waste water is brought into the air to obtain hot humid air and concentrated solution, the obtained concentrated solution flows to the bottom of the tower and the waste water in the system enter the concentrated solution circulation pipeline to form waste water concentration circulation, the hot humid air in the humidifying tower is pumped into the dehumidifying tower by an inter-tower fan, clear liquid is distributed to the packed bed layer by the water distributor in the dehumidifying tower and flows to the bottom of the tower under the action of gravity, the hot humid air carries out mass transfer and heat transfer on the surface of the packed bed layer and the cooled clear liquid, and gaseous steam in the hot humid air reaches a condensation dew point, the obtained water drops and the air after rising to the top of the tower enter the air circulation pipeline to carry out air dehumidification circulation, and the dehumidified air after the obtained drops enter the air circulation pipeline to enter the bottom of the wet air distribution disc in the humidifying tower through a dehumidifying air outlet E to form dry air circulation.
10. The concentration method of the air-humidification-based wastewater concentration system according to claim 9, wherein: the method is characterized in that: and discharging the super-concentrated solution gathered at the bottom of the humidifying tower from a super-concentrated solution discharge pipe to a dryer through a concentrated solution lifting pump for secondary concentration and drying, and backfilling the dried solid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010420964.7A CN111453915B (en) | 2020-05-18 | 2020-05-18 | Wastewater concentration system and method based on air humidification and dehumidification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010420964.7A CN111453915B (en) | 2020-05-18 | 2020-05-18 | Wastewater concentration system and method based on air humidification and dehumidification |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111453915A CN111453915A (en) | 2020-07-28 |
| CN111453915B true CN111453915B (en) | 2024-07-16 |
Family
ID=71675736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010420964.7A Active CN111453915B (en) | 2020-05-18 | 2020-05-18 | Wastewater concentration system and method based on air humidification and dehumidification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111453915B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112678903B (en) * | 2020-12-30 | 2022-12-02 | 北京首创环境科技有限公司 | Salt-containing wastewater treatment equipment and method |
| CN112960716A (en) * | 2021-02-18 | 2021-06-15 | 同济大学 | Aeration type humidification, dehumidification and evaporation system and method |
| CN118577090A (en) * | 2024-08-06 | 2024-09-03 | 南通凌志环保科技有限公司 | Combined bag dust collector |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212334914U (en) * | 2020-05-18 | 2021-01-12 | 上海蜀库环保科技中心 | Waste water concentration system based on air humidification and dehumidification |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9410750B1 (en) * | 2015-01-23 | 2016-08-09 | Technip Process Technology, Inc. | Gas distributor for heat exchange and/or mass transfer column |
| CN207511867U (en) * | 2017-08-07 | 2018-06-19 | 华南理工大学 | A kind of telescopic bubbling humidification desalination plant |
| CN208471753U (en) * | 2018-06-08 | 2019-02-05 | 河南省兴洋环保科技有限公司 | A kind of desulfurization wastewater Zero discharging system of humidification-dehumidifying coupling pressure retarded osmosis |
| CN209226762U (en) * | 2018-12-17 | 2019-08-09 | 新疆天富集团有限责任公司 | A kind of waste-water treatment tower used when wet desulphurization |
-
2020
- 2020-05-18 CN CN202010420964.7A patent/CN111453915B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212334914U (en) * | 2020-05-18 | 2021-01-12 | 上海蜀库环保科技中心 | Waste water concentration system based on air humidification and dehumidification |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111453915A (en) | 2020-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111453915B (en) | Wastewater concentration system and method based on air humidification and dehumidification | |
| CN106986486B (en) | High organic effluent treatment plant that contains salt | |
| CN106800320B (en) | A regenerative humidification and dehumidification solar seawater desalination system and process method | |
| CN109020031B (en) | An Evaporation Concentration System Based on Thermodynamic Compression | |
| CN107324426A (en) | A kind of residual heat from boiler fume coupling evaporation concentrates desulfurization wastewater system | |
| CN104118918A (en) | Utilize waste water vaporization system of solar energy | |
| CN104707350B (en) | Steam-driven supergravity field enhanced evaporation system | |
| WO1991000759A1 (en) | Method and apparatus for evaporation of liquids | |
| CN112239242A (en) | Desulfurization wastewater zero-discharge system for gradient utilization of flue gas waste heat and working method thereof | |
| CN104001342B (en) | A kind of vacuum atomizing flash distillation water separation device for salting liquid | |
| CN108117215A (en) | High-salt wastewater cycles tubulation atmospheric evaporation decrement treatment method and apparatus | |
| CN206680208U (en) | A kind of residual heat from boiler fume coupling evaporation concentrates desulfurization wastewater system | |
| CN212334914U (en) | Waste water concentration system based on air humidification and dehumidification | |
| CN108421270A (en) | Low-temperature normal-pressure evaporation device for biogas slurry concentration | |
| CN103449547B (en) | Serial multi-stage isothermal heating multiple-effect heat return humidifying and dehumidifying solar-powered seawater desalination machine | |
| CN106365227A (en) | Double-latent multistate cycle membrane distillation method and system | |
| Karhe et al. | A solar desalination system using humidification-dehumidification process-A review of recent research | |
| CN110407384B (en) | Waste heat recovery and whitening combined wastewater treatment device | |
| CN208856938U (en) | A kind of desulfurization wastewater concentration structure | |
| CN206152367U (en) | Low temperature evaporation plant | |
| CN110117033B (en) | Method and device for evaporating high-salt-content wastewater at low temperature through capillary | |
| CN214218241U (en) | Novel combined evaporation concentration device with ultralow energy consumption | |
| CN2934211Y (en) | Seawater desalination low temperature multi-effect device | |
| CN210751324U (en) | Falling film evaporation system | |
| CN107814423B (en) | Bubbling humidifying dehumidifying sea water desalting device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230412 Address after: No.156, Hanjiang Road, Xinbei District, Changzhou City, Jiangsu Province 213025 Applicant after: Welly Environmental Technology Group Co.,Ltd. Address before: 201700 room 228, area C, 2 / F, building 3, 69 Huafang Road, Qingpu District, Shanghai Applicant before: Shanghai Shuku environmental protection technology center |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |