CN213265806U - Multi-effect flash evaporation concentration system for salt-containing wastewater driven by waste heat of slag flushing water - Google Patents
Multi-effect flash evaporation concentration system for salt-containing wastewater driven by waste heat of slag flushing water Download PDFInfo
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- CN213265806U CN213265806U CN202022143621.9U CN202022143621U CN213265806U CN 213265806 U CN213265806 U CN 213265806U CN 202022143621 U CN202022143621 U CN 202022143621U CN 213265806 U CN213265806 U CN 213265806U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 89
- 239000002351 wastewater Substances 0.000 title claims abstract description 70
- 150000003839 salts Chemical class 0.000 title claims abstract description 61
- 239000002893 slag Substances 0.000 title claims abstract description 49
- 239000002918 waste heat Substances 0.000 title claims abstract description 15
- 238000001704 evaporation Methods 0.000 title claims description 47
- 230000008020 evaporation Effects 0.000 title claims description 47
- 238000011010 flushing procedure Methods 0.000 title claims description 36
- 238000007701 flash-distillation Methods 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 239000008236 heating water Substances 0.000 claims abstract description 26
- 239000012267 brine Substances 0.000 claims abstract description 15
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims description 61
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 9
- 239000011780 sodium chloride Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 239000013049 sediment Substances 0.000 abstract description 5
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 239000010842 industrial wastewater Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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Abstract
The utility model provides a towards slag water waste heat drive contains salt waste water multiple-effect flash distillation concentrated system, includes towards slag water multiple-effect flash distillation plant, and the flash steam of towards slag water multiple-effect flash distillation plant passes through the pipeline and gets into containing salt waste water multiple-effect flash distillation plant after containing salt waste water heat exchanger group and flash steam heat transfer, and the strong brine gets into containing salt waste water multiple-effect flash distillation plant after containing salt waste water multiple-effect flash distillation plant's flash steam passes through the pipeline and gets into heating heat exchanger group, heats after the flash steam heat transfer in heating water and the heating heat exchanger group. Utilize a large amount of towards sediment water waste heat to contain the concentration of salt waste water, heat supply season is external heat supply simultaneously, improves steel mill's energy availability factor.
Description
Technical Field
The utility model relates to an industrial wastewater treatment technical field, in particular to towards drive of sediment water waste heat and contain salt waste water multiple-effect flash distillation concentration system.
Background
At present, low-temperature industrial wastewater exists in various fields such as steel, chemical industry, printing and dyeing, coking and the like, and contains huge low-temperature heat sources. These industrial wastewaters are complex in composition and if directly heated by a heat exchanger, corrosion, wear and scaling can seriously affect the reliability and life of the equipment. Therefore, the problem can be effectively solved by adopting multi-effect flash evaporation.
SUMMERY OF THE UTILITY MODEL
For overcoming the problem that exists among the prior art, the utility model provides a drive of towards sediment water waste heat contains salt waste water multiple-effect flash distillation concentrated system.
The utility model provides a technical scheme that its technical problem adopted is: this kind of towards slag water waste heat drive contains salt waste water multiple-effect flash distillation concentrated system, including towards slag water multiple-effect flash distillation plant, towards slag water multiple-effect flash distillation plant's flash steam passes through the pipeline and gets into containing salt waste water multiple-effect flash distillation plant, and the strong brine gets into containing salt waste water multiple-effect flash distillation plant after containing salt waste water heat exchanger group and flash steam heat transfer, and the flash steam that contains salt waste water multiple-effect flash distillation plant passes through the pipeline and gets into heating heat exchanger group, heats after the flash steam heat transfer in heating water and the heating heat exchanger group.
Furthermore, the slag flushing water multi-effect flash evaporation device comprises at least three effects, wherein the first effect to the Nth effect are sequentially formed from top to bottom, the upper part of each effect is provided with a flash evaporation steam outlet correspondingly, high-temperature slag flushing water enters through a water inlet in the top of the slag flushing water multi-effect flash evaporation device and is discharged through a water outlet in the bottom of the slag flushing water multi-effect flash evaporation device and returns to the slag flushing water tank.
And further, strong brine enters from the bottom of the salt-containing wastewater heat exchanger set, is subjected to multiple heat exchange with flash steam from the slag flushing water multi-effect flash evaporation device and then is discharged from the top of the salt-containing wastewater heat exchanger set, and enters the salt-containing wastewater multi-effect flash evaporation device from the top of the salt-containing wastewater multi-effect flash evaporation device, and the flash steam from the slag flushing water multi-effect flash evaporation device is subjected to heat exchange with the strong brine and then is discharged to a condensation water tank.
Further, contain salt waste water multiple-effect flash distillation plant also includes at least triple effect, from the top down is first effect to the Nth effect in proper order, and the upper portion of each effect all corresponds to there is a flash distillation steam outlet, and the strong brine is discharged to next process from containing salt waste water multiple-effect flash distillation plant bottom after the salt waste water multiple-effect flash distillation plant is concentrated.
Further, the heating heat exchanger group has two kinds of operating modes, do respectively: heating working conditions and non-heating working conditions;
and (3) heating working conditions: heating water enters the heating water heat exchanger group from the first-effect heat exchanger with the lowest temperature, absorbs the heat of the steam flash evaporation of the saline wastewater, and is sent to a heat user after being heated and heated step by step; each effect of condensed water is collected to a condensed water tank;
and (3) non-heating working condition: heating water enters the heating water heat exchanger group from the first-effect heat exchanger with the lowest temperature, absorbs the heat of the steam flash of the saline wastewater, is sent to the cooling tower after being heated and heated step by step, and returns to the inlet of the heating water heat exchanger group after being cooled and cooled by the cooling tower; each effect of condensed water is collected to a condensed water tank.
To sum up, the utility model discloses an above-mentioned technical scheme's beneficial effect as follows:
utilize a large amount of towards sediment water waste heat to contain the concentration of salt waste water, heat supply season is external heat supply simultaneously, improves steel mill's energy availability factor.
Drawings
Fig. 1 is a structural view of the present invention.
In the figure:
1 flushing slag water multiple-effect flash distillation device, 2 contain salt waste water heat exchanger group, 3 contain salt waste water multiple-effect flash distillation device, 4 heating heat exchanger group, 5 condensation water pitcher, 6 cooling tower.
Detailed Description
The features and principles of the present invention will be described in detail below with reference to the accompanying drawings, and the illustrated embodiments are only for explaining the present invention, and do not limit the scope of the present invention.
As shown in figure 1, this kind of towards slag water waste heat drive contains salt waste water multiple-effect flash distillation concentrated system, including towards slag water multiple-effect flash distillation plant 1, towards slag water multiple-effect flash distillation plant 1's flash steam passes through the pipeline and gets into containing salt waste water multiple-effect flash distillation plant 2, and the strong brine gets into containing salt waste water multiple-effect flash distillation plant 3 after containing salt waste water multiple-effect flash distillation plant 2 and the heat transfer of flash steam, contains salt waste water multiple-effect flash distillation plant 3's flash steam and passes through the pipeline and get into heating heat exchanger group 4, heats after the heat transfer of flash steam in heating water and the heating.
The slag flushing water multi-effect flash evaporation device 1 comprises at least three effects, namely a first effect to an Nth effect from top to bottom, wherein the upper part of each effect is provided with a flash evaporation steam outlet correspondingly. The utility model discloses use five effects to explain as the example, from the top down is first effect in proper order promptly, the second is imitated, the third is imitated, fourth is imitated and fifth is imitated, and each flash steam outlet from the top down that imitates the correspondence is first effect flash steam outlet in proper order, and flash steam outlet is imitated to the second, and flash steam outlet is imitated to the third, and flash steam outlet is imitated to the fourth and flash steam outlet is imitated to the fifth. The high-temperature slag flushing water enters through a water inlet at the top of the slag flushing water multi-effect flash evaporation device 1 and is discharged through a water outlet at the bottom of the slag flushing water multi-effect flash evaporation device 1 and returns to the slag flushing water tank.
The strong brine gets into from the 2 bottoms of salt waste water heat exchanger group, carries out a lot of heat transfer with the flash steam that comes from sluicing water multiple-effect flash distillation plant 1 after discharging from the 2 tops of salt waste water heat exchanger group and getting into from the 3 tops of salt waste water multiple-effect flash distillation plant 3 that contain salt, discharges to condensation water tank 5 after the flash steam that comes from sluicing water multiple-effect flash distillation plant 1 exchanges heat with the strong brine.
The multi-effect salt-containing wastewater flash evaporation device 3 also comprises at least three effects, namely a first effect to an Nth effect from top to bottom, wherein the upper part of each effect is provided with a flash evaporation steam outlet correspondingly. Similarly, the utility model discloses use five effects to explain as the example, from the top down is first effect in proper order promptly, the second is imitated, the third is imitated, fourth is imitated and fifth is imitated, and the flash steam export from the top down that each is imitated corresponds is first effect flash steam outlet in proper order, second effect flash steam outlet, third is imitated flash steam outlet, fourth is imitated flash steam outlet and fifth is imitated flash steam outlet. Concentrated brine is concentrated by the multiple-effect salt-containing wastewater flash evaporation device 3 and then is discharged to the next procedure from the bottom of the multiple-effect salt-containing wastewater flash evaporation device 3.
The heating heat exchanger group 4 has two working conditions, which are respectively: heating working condition and non-heating working condition.
And (3) heating working conditions: heating water enters the heating water heat exchanger group from the first-effect heat exchanger with the lowest temperature, absorbs the heat of the steam flash evaporation of the saline wastewater, and is sent to a heat user after being heated and heated step by step; each effect of the condensed water is collected to the condensed water tank 5.
And (3) non-heating working condition: heating water enters the heating water heat exchanger group from the first-effect heat exchanger with the lowest temperature, absorbs the heat of the steam flash of the saline wastewater, is sent to the cooling tower 6 after being heated and heated step by step, and returns to the inlet of the heating water heat exchanger group after being cooled and cooled in the cooling tower 6; each effect of the condensed water is collected to the condensed water tank 5.
Specifically, the high-temperature slag flushing water firstly enters a first-stage closed space (first effect for short) in a negative pressure state from the upper part of the slag flushing water multi-effect flash evaporation device 1, and the negative pressure is formed by an external vacuum pump. In the first effect, as shown in fig. 1, there is a water space and a steam space. During operation, the water space is kept at a reasonable water level, and the steam space of the first effect and the second effect is isolated. Under the action of an external vacuum pump, under a certain proper vacuum/pressure, the high-temperature sewage in the first effect reaches a saturated state, and after a part of water vapor evaporated from the sewage in the first effect water space flows out from a first effect flash evaporation steam outlet, heat energy and working medium recovery are carried out outside the slag flushing water multi-effect flash evaporation device 1.
The residual high-temperature sewage in the first effect water space flows into the second effect of the slag flushing water multi-effect flash evaporation device 1 under the action of gravity, and the principle of the second effect is the same as that of the first effect. The main difference is that the second effect has a lower saturation temperature and saturation pressure than the first effect, and thus the temperature of the steam exiting the flash steam outlet from the second effect is also lower than the first effect.
The effect number of the multi-effect flash evaporation device depends on the actual industrial situation, and the total effect number is generally between three and seven (not limited to). From the first effect to the last effect, the steam pressure and temperature gradually decrease. The same is true for the working principle of the multi-effect salt-containing wastewater flash evaporation device 3.
The utility model consists of four parts (as shown in figure 1), the first part is a multi-effect flash evaporation device 1 for slag flushing water; the second part is a salt-containing wastewater heat exchanger group 2; the third part is a multi-effect salt-containing wastewater flash evaporation device 3; the fourth part is a heating water heat exchanger group.
The working principle is as follows:
1. the high-temperature slag flushing water enters a multi-effect flash evaporation device 1 for the slag flushing water, and steam generated in each effect enters a salt-containing wastewater heat exchanger group 2; the concentrated slag flushing water returns to the slag flushing water pool.
2. The normal-temperature salt-containing wastewater enters the salt-containing wastewater heat exchanger group 2 from the first-effect heat exchanger with the lowest temperature, absorbs the heat of flash steam of the slag flushing water, and is heated step by step to raise the temperature; each effect of the condensed water is collected to a condensed water tank.
3. The heated salt-containing wastewater enters a multi-effect salt-containing wastewater flash evaporation device 3, and steam generated in each effect enters a heating water heat exchanger group; the concentrated salt-containing wastewater enters the next working procedure (crystallization).
4. And (3) heating working conditions:
heating water enters the heating water heat exchanger group from the first-effect heat exchanger with the lowest temperature, absorbs the heat of the steam flash evaporation of the saline wastewater, and is sent to a heat user after being heated and heated step by step; each effect of the condensed water is collected to a condensed water tank.
5. And (3) non-heating working condition:
heating water enters the heating water heat exchanger group from the first-effect heat exchanger with the lowest temperature, absorbs the heat of the steam flash of the saline wastewater, is sent to the cooling tower 6 after being heated and heated step by step, and returns to the inlet of the heating water heat exchanger group after being cooled and cooled in the cooling tower 6; each effect of the condensed water is collected to a condensed water tank.
A large amount of slag flushing water and strong brine discharged by a steel plant pollute the environment and are not suitable for direct discharge. The temperature of the slag flushing water is generally between 70 and 80 ℃, the flow is large, and a large amount of low-temperature waste heat is contained; the salt-containing wastewater has high concentration, can not be directly discharged, and needs to be subjected to reduction after concentration or further crystallization treatment. If directly concentrate the waste water that contains salt, need consume a large amount of heats, reduced steel mill's energy availability factor. The utility model discloses utilize a large amount of towards sediment water waste heat to contain the concentration of salt waste water, the outside heat supply of concurrent heating season improves the energy availability factor of steel mill.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, which is defined by the appended claims.
Claims (5)
1. The utility model provides a towards slag water waste heat drive contains salt waste water multiple-effect flash distillation concentrated system, a serial communication port, including towards slag water multiple-effect flash distillation plant, towards slag water multiple-effect flash distillation plant's flash steam passes through the pipeline and gets into containing salt waste water multiple-effect flash distillation plant after containing salt waste water heat exchanger group and flash steam heat transfer, and the strong brine gets into containing salt waste water multiple-effect flash distillation plant through the pipeline, contains salt waste water multiple-effect flash distillation plant's flash steam and gets into heating heat exchanger group, heats after the flash steam heat transfer in heating water and the heating heat exchanger group.
2. The multi-effect flash evaporation concentration system for the brine wastewater driven by the waste heat of the slag flushing water as claimed in claim 1, wherein the multi-effect flash evaporation device for the slag flushing water comprises at least three effects, the first effect to the Nth effect are sequentially performed from top to bottom, the upper part of each effect corresponds to one flash evaporation steam outlet, the high-temperature slag flushing water enters through a water inlet in the top of the multi-effect flash evaporation device for the slag flushing water and is discharged through a water outlet in the bottom of the multi-effect flash evaporation device for the slag flushing water and returns to the slag flushing water tank.
3. The system of claim 1, wherein strong brine enters from the bottom of the salt-containing wastewater heat exchanger set, is subjected to multiple heat exchanges with flash steam from the slag flushing water multiple-effect flash evaporation device and then is discharged from the top of the salt-containing wastewater heat exchanger set, and enters the salt-containing wastewater multiple-effect flash evaporation device from the top of the salt-containing wastewater multiple-effect flash evaporation device, and flash steam from the slag flushing water multiple-effect flash evaporation device exchanges heat with the strong brine and then is discharged to the condensate tank.
4. The system of claim 1, wherein the salt-containing wastewater multi-effect flash evaporation concentration system driven by waste heat of the slag washing water also comprises at least three effects, the first effect to the Nth effect are sequentially formed from top to bottom, the upper part of each effect is provided with a flash evaporation steam outlet, and the concentrated brine is concentrated by the salt-containing wastewater multi-effect flash evaporation device and then discharged from the bottom of the salt-containing wastewater multi-effect flash evaporation device to the next process.
5. The multi-effect flash evaporation and concentration system for the saline wastewater driven by the waste heat of the slag flushing water as claimed in claim 1, wherein the heating heat exchanger group has two working conditions which are respectively: heating working conditions and non-heating working conditions;
and (3) heating working conditions: heating water enters the heating water heat exchanger group from the first-effect heat exchanger with the lowest temperature, absorbs the heat of the steam flash evaporation of the saline wastewater, and is sent to a heat user after being heated and heated step by step; each effect of condensed water is collected to a condensed water tank;
and (3) non-heating working condition: heating water enters the heating water heat exchanger group from the first-effect heat exchanger with the lowest temperature, absorbs the heat of the steam flash of the saline wastewater, is sent to the cooling tower after being heated and heated step by step, and returns to the inlet of the heating water heat exchanger group after being cooled and cooled by the cooling tower; each effect of condensed water is collected to a condensed water tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022143621.9U CN213265806U (en) | 2020-09-25 | 2020-09-25 | Multi-effect flash evaporation concentration system for salt-containing wastewater driven by waste heat of slag flushing water |
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| CN202022143621.9U CN213265806U (en) | 2020-09-25 | 2020-09-25 | Multi-effect flash evaporation concentration system for salt-containing wastewater driven by waste heat of slag flushing water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198736A (en) * | 2021-11-19 | 2022-03-18 | 山东鲁润热能科技有限公司 | A vacuum phase change flash evaporation condensation heat and water extraction device |
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- 2020-09-25 CN CN202022143621.9U patent/CN213265806U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198736A (en) * | 2021-11-19 | 2022-03-18 | 山东鲁润热能科技有限公司 | A vacuum phase change flash evaporation condensation heat and water extraction device |
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