CN114993030A - System and method for eliminating peculiar smell of waste steam of tube bundle dryer - Google Patents
System and method for eliminating peculiar smell of waste steam of tube bundle dryer Download PDFInfo
- Publication number
- CN114993030A CN114993030A CN202210792731.9A CN202210792731A CN114993030A CN 114993030 A CN114993030 A CN 114993030A CN 202210792731 A CN202210792731 A CN 202210792731A CN 114993030 A CN114993030 A CN 114993030A
- Authority
- CN
- China
- Prior art keywords
- tube bundle
- pressure
- steam
- waste steam
- differential pressure
- 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.)
- Pending
Links
- 239000002699 waste material Substances 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 32
- 238000005406 washing Methods 0.000 claims abstract description 29
- 238000007599 discharging Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 22
- 238000000605 extraction Methods 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- 230000001877 deodorizing effect Effects 0.000 claims 6
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 abstract description 3
- 235000002017 Zea mays subsp mays Nutrition 0.000 abstract description 3
- 235000005822 corn Nutrition 0.000 abstract description 3
- 240000008042 Zea mays Species 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 239000002912 waste gas Substances 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 102000004169 proteins and genes Human genes 0.000 description 4
- 108090000623 proteins and genes Proteins 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 241000209149 Zea Species 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000752 ionisation method Methods 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention belongs to the field of eliminating pollution to the atmosphere by deep processing of corn, in particular to a method and a device system for eliminating the peculiar smell by eliminating the condition generated by the peculiar smell of waste steam of a tube bundle dryer (hereinafter referred to as tube bundle), comprising the following steps: the system comprises a tube bundle dryer, a waste steam direct exhaust chimney, a draught fan, a pressure difference sensor, a pressure difference air quantity controller, a steam washing tower, a washed waste steam exhaust chimney and a steam washed hot water flash tank; the tube bundle dryer is provided with a discharge end vent, a feed inlet, a return port, a condensate outlet, a discharge port, a steam inlet and a feed end vent; one side of the upper shell of the tube bundle dryer is communicated with a waste steam direct-discharging atmosphere chimney and is used for directly discharging waste steam; the invention provides a method and a device system for eliminating the odor of waste gas of a dryer to pollute the atmosphere, which adopt the condition of avoiding the contact of the surface of a material with higher temperature and air to eliminate the generated odor, thereby having no oxidation reaction of the generated odor and achieving the purpose of eliminating the odor from the root.
Description
Technical Field
The present invention belongs to the field of eliminating atmospheric pollution caused by deep processing of corn. In particular to a method and a device system for eliminating the peculiar smell by eliminating the condition generated by the peculiar smell of the waste steam of a tube bundle dryer.
Background
The products of the corn deep processing industry are starch, ethanol, fiber, germ, protein and the like. And (3) reducing the water content of the fiber, the germ and the protein from 50-60% to 12% by using a tube bundle dryer (hereinafter referred to as a tube bundle) to obtain a finished product. The main structure of the tube bundle is as follows: the shell is a box body made of steel plates and is divided into an upper shell and a lower shell, and the tube bundle is hung in the middle of the box body and can rotate by being dragged by a motor. One end of the tube array is filled with high-temperature raw steam, and the other end of the tube array discharges condensed water. The heat of the steam is conducted to the wet material by the tube wall to raise the temperature to 100 deg.C or above, the moisture is escaped and dried, and the generated steam releases heat and is condensed into condensed water. The tube bundle is provided with a shoveling plate, when the tube bundle rotates, the shoveling plate turns up the material from the lower part and pushes the material from the feeding end to the discharging end, and then the material is discharged out of the tube bundle from the discharging port. The tube bundle shell is provided with a feed inlet, a discharge outlet, a mixed gas, namely a waste steam discharge outlet, a feed end vent hole and a discharge end vent hole. Before drying, the fiber, germ and protein have no odor. The tube bundle is provided with a draught fan. When the air-conditioner runs, the fan sucks air into the tube bundle from the vent holes, and the sucked air accounts for 30-50% of the total amount of gas. The evaporation steam generated by the material drying, the air sucked into the tube bundle and the peculiar smell gas generated in the drying process are pumped out from the mixed gas outlet. The industry refers to the mixed gas as waste steam. The waste steam has strong peculiar smell, causes air pollution and damages the health of workers. It is therefore a common phenomenon that factories are penalized for environmental protection. The method for treating the peculiar smell comprises an ionization method and an alkaline water washing method. The odor of the ionized gas is not reduced, which proves that the ionization method can not decompose the odor gas at all and consumes a large amount of electric energy, thus increasing the burden of enterprises. The alkaline water washing can wash a part of dust, but the peculiar smell is not reduced, and the discharge of the alkaline sewage pollutes the environment while increasing the cost. Therefore, many enterprises do not carry out peculiar smell treatment and directly discharge the peculiar smell into the atmosphere through a chimney. Therefore, it is necessary to find out the source of the generation of the odor and further find out a method for eliminating the odor, and thoroughly eliminate the odor pollution.
Disclosure of Invention
Research has proved that the odorous gas is the product of the chemical reaction of oxygen in the air with part of the higher temperature material. The invention provides a method and a device system for eliminating the conditions of chemical reaction, thereby not generating chemical reaction and thoroughly eliminating the peculiar smell of waste steam.
The technical scheme adopted for solving the technical problems is as follows:
the invention provides a system for eliminating peculiar smell of waste steam of a tube bundle dryer, which comprises the tube bundle dryer, a waste steam directly-discharged atmosphere chimney, a stop valve, an induced draft fan, a pressure difference sensor, a pressure difference air quantity controller, a steam washing tower, a washed waste steam discharged atmosphere chimney and a hot water flash tank after steam washing;
the tube bundle dryer is provided with a discharge end vent, a feed inlet, a return port, a condensate outlet, a discharge port, a steam inlet and a feed end vent;
one side of the upper shell of the tube bundle dryer is communicated with a waste steam direct-discharging atmosphere chimney and is used for directly discharging waste steam into the atmosphere;
the other side of the upper shell of the tube bundle dryer is communicated with an induced draft fan, the output end of the induced draft fan is communicated with a gas washing tower, the upper end of the gas washing tower is provided with a washed waste steam exhaust chimney, and the other side of the gas washing tower is communicated with a flash tank;
the air quantity control device is electrically connected with the induced draft fan and used for controlling the induced draft fan.
Preferably, the differential pressure sensor is a micro differential pressure type differential pressure sensor
Preferably, the pressure difference air volume controller is a frequency converter with a PID function, the pressure difference sensor is electrically connected with the frequency converter, and the frequency converter is electrically connected with the induced draft fan.
Preferably, the differential pressure air quantity controller is composed of one of a computer and a PLC and a frequency converter, the sensor is electrically connected with one of the computer or the PLC, the one of the computer or the PLC is electrically connected with the frequency converter, and the frequency converter is electrically connected with the induced draft fan.
Preferably, the pressure and air volume controller is a manual potentiometer, the potentiometer is electrically connected with a frequency converter, and the frequency converter is electrically connected with the induced draft fan.
Preferably, the waste steam direct exhaust air chimney and the material returning port are both provided with a stop valve.
Preferably, the shut-off valve is a plug-in plate type or a flap type.
Preferably, the induced draft fan is one of a centrifugal type and a centrifugal axial flow mixed flow type.
Preferably, the differential pressure sensor is a differential pressure sensor of a micro differential pressure type.
Preferably, the pressure air volume controller is a frequency converter with a PID when a computer or a PLC is not arranged.
Preferably, the shut-off valve is a plug-in plate type or a flap type.
Preferably, the method comprises the following steps:
s1: arranging an induced draft fan, and drying the evaporation steam, namely the waste steam generated in the wet material drying process by a suction pipe bundle;
s2: and a micro differential pressure sensor is arranged, one end of the sensor is connected into the tube bundle box body, and the other end of the sensor is connected with the atmosphere and converts differential pressure signals into electric signals. Transmitting to a differential pressure air quantity controller;
s3: arranging a tube bundle differential pressure air quantity control device which is a frequency converter with a PID function, or one of a computer and a PLC and a frequency converter, or a potentiometer; the frequency converter receives an electric signal sent by a differential pressure sensor or a computer or a PLC or given by a potentiometer, and controls the rotating speed of the induced draft fan according to one of the three signals to change the steam extraction amount of the induced draft fan;
s4: the method of changing the steam extraction quantity of the induced draft fan is used for realizing that the pressure in the tube bundle box body is equal to the local atmospheric pressure, namely the pressure difference between the two is zero;
s5: the control point of the differential pressure air quantity control device is zero, namely, the pressure in the tube bundle box is kept equal to the local atmospheric pressure;
the low-pressure end of the differential pressure sensor is connected with the tube bundle box body, the high-pressure end is connected with the atmosphere, and when the signal sent by the differential pressure sensor is greater than zero, namely the pressure in the tube bundle is lower than the atmospheric pressure, the rotating speed of the fan is reduced, the steam extraction amount is reduced, the pressure in the tube bundle box body is increased, and the differential pressure signal returns to zero. When the signal from the pressure difference sensor is less than zero, that is, the pressure in the tube bundle is higher than atmospheric pressure, the rotating speed of the induced draft fan is increased to increase the steam extraction amount so as to make the pressure difference signal return to zero. Thus, the pressure in the tube bundle is equal to the local atmospheric pressure, air cannot enter the tube bundle, the possibility that materials at higher temperature contact with oxygen to generate chemical reaction is eliminated, and peculiar smell gas is not generated;
or the rotating speed of the fan is changed by a signal given by a potentiometer so as to change the steam extraction quantity to ensure that the pressure in the tube bundle is equal to the local atmospheric pressure;
s6: conversely, the high-pressure end of the differential pressure sensor is connected with the tube bundle box body, the low-pressure end is connected with the atmosphere, when the differential pressure signal is a positive value, namely the pressure in the tube bundle box body is higher than the local atmospheric pressure, the differential pressure air quantity control device increases the rotating speed of the fan to increase the steam extraction quantity so that the pressure in the tube bundle box body is reduced to the local atmospheric pressure to enable the differential pressure signal to return to zero; when the pressure difference signal is less than zero, namely the pressure in the tube bundle box body is lower than the local atmospheric pressure, reducing the rotating speed of the fan to reduce the steam extraction amount, and increasing the pressure in the tube bundle box body to the local atmospheric pressure to enable the pressure difference signal to return to zero;
s7: a steam washing tower is arranged to wash the waste steam, and the waste steam is not added with alkali, so that only dust in the waste steam is removed, and dust pollution is eliminated;
s8: the washed waste steam is discharged into the atmosphere through a waste steam exhaust chimney after washing;
s9: when the fan works normally, the waste steam direct-exhaust air chimney cut-off valve of the pipe bundle is closed, and when the fan cannot work normally, the waste steam direct-exhaust air chimney cut-off valve is opened;
s10: when the device normally operates, the air vent at the feed end and the air vent at the discharge end are shielded or closed;
s11: and when no material return exists, closing the material return stop valve.
Compared with the prior art, the method has the following advantages:
the system and the method of the invention prevent air from entering the tube bundle and generating peculiar smell gas by chemical reaction with the surface of the dried material with higher temperature by keeping the pressure in the tube bundle equal to the local atmospheric pressure, thereby removing the source of the peculiar smell gas and avoiding the pollution of the peculiar smell gas to the atmosphere and the harm to human bodies. Realizes emission reduction and environmental protection and has strong practical value.
Drawings
FIG. 1 is a schematic diagram of the operation of the system of the present invention.
In the drawings: 10-a tube bundle dryer, 11-a discharge end vent, 12-a feed inlet, 13-a material return port, 14-a condensate outlet, 16-a discharge port, 17-a steam inlet, 18-a feed end vent, 20-a waste steam direct exhaust air chimney, 21-a cut-off valve, 40-an induced draft fan, 50-a differential pressure air quantity controller, 60-a differential pressure sensor, 70-a gas washing tower, 80-a washed waste steam exhaust air chimney and 90-a flash tank.
Detailed Description
The invention is further described below with reference to the accompanying drawings and embodiments.
As shown in fig. 1, the present embodiment discloses embodiment 1:
a system for eliminating peculiar smell of waste steam of a tube bundle dryer comprises a tube bundle dryer 10, a waste steam direct exhaust atmospheric chimney 20, a cut-off valve 21, a draught fan 40, a pressure air quantity controller 50, a differential pressure sensor 60, a steam washing tower 70, a washed waste steam exhaust atmospheric chimney 80 and a steam washed hot water flash tank 90;
the tube bundle dryer 10 is provided with a discharge end vent 11, a feed inlet 12, a material returning port 13, a condensed water outlet 14, a discharge port 16, a steam inlet 17 and a feed end vent 18;
one end of the upper shell of the tube bundle dryer 10 is communicated with a waste steam direct-discharging atmosphere chimney 20 and is used for directly discharging waste steam;
the other end of the upper shell of the tube bundle dryer 10 is communicated with an induced draft fan 40, the output end of the induced draft fan 40 is communicated with a scrubber 70, the upper end of the scrubber 70 is provided with a waste steam exhaust chimney after washing, and the other side of the scrubber is communicated with a flash tank;
the air quantity control device is characterized by further comprising a differential pressure air quantity controller 50 electrically connected with the induced draft fan 40, and the differential pressure air quantity controller 50 is used for controlling the induced draft fan.
As a further preferred embodiment of the present invention, the differential pressure air volume controller 50 is a frequency converter with a PI D function, and has an input end electrically connected to the differential pressure sensor and an output end electrically connected to the induced draft fan.
As a further preferred embodiment of the present invention, the differential pressure air volume controller 50 is one of a computer or a PLC and a frequency converter, the differential pressure sensor is electrically connected to the one of the computer or the PLC, the one of the computer or the PLC is electrically connected to the frequency converter, and the frequency converter is electrically connected to the induced draft fan.
In a further preferred embodiment of the present invention, the waste steam direct exhaust chimney 20 and the return port 13 are both provided with a shut-off valve.
As a further preferred embodiment of the present invention, the induced draft fan 40 is one of a centrifugal type and a mixed flow type.
In a further preferred embodiment of the present invention, the differential pressure sensor is a differential pressure sensor of a micro differential pressure type.
In a further preferred embodiment of the present invention, the differential pressure air volume controller 50 is an inverter.
In a further preferred embodiment of the present invention, the differential pressure air volume controller 50 is an inverter with a PI D function.
In a further preferred embodiment of the present invention, the shut valve 21 is of a plate type or a flap type.
The difference from the first embodiment is that: the differential pressure air quantity controller 50 is composed of one of a computer and a PLC frequency converter.
In the above, the pressure difference between the waste steam pressure in the tube bundle dryer 10 and the atmospheric pressure is monitored and converted into an electric signal through the pressure difference sensor, the electric signal is transmitted to the computer or the PLC, the computer or the PLC calculates the signal, the calculation result is compared with the set value and then converted into an instruction, the instruction is transmitted to the frequency converter, the frequency converter controls and adjusts the rotating speed of the induced draft fan 40 according to the instruction to change the steam extraction amount, the pressure difference between the waste steam pressure in the tube bundle and the atmospheric pressure is zero, and air cannot enter the tube bundle.
The invention also discloses a third embodiment:
the difference between the first embodiment and the second embodiment is that: the pressure air volume controller 50 is a potentiometer, and the potentiometer is electrically connected with a differential pressure air volume controller frequency converter, and the frequency converter is electrically connected with the induced draft fan 40.
In the aforesaid, but manual operation potentiometre, control resistance for draught fan 40 carries the required electric current, and then makes the steam extraction volume of draught fan 40 guarantee that the pressure differential of interior exhaust steam pressure of tube bank and atmospheric pressure is zero, makes the air can not get into the tube bank.
As a further preference in the present invention, the method comprises the following steps:
s1: arranging an induced draft fan, and sucking the evaporation steam generated in the process of drying the wet materials by a tube bundle;
s2: a micro-differential pressure sensor is arranged, one negative pressure end of the sensor is connected into the tube bundle box, and the other high pressure end of the sensor is connected with atmosphere and converts differential pressure signals into electric signals. Transmitting to a frequency converter of a differential pressure air quantity control device;
s3: the control device receives an electric signal sent by a differential pressure sensor or a computer or given by a potentiometer, controls the rotating speed of the induced draft fan according to one of the differential pressure signal, the induced draft fan and the electric signal, and changes the steam extraction amount of the induced draft fan;
s4: the method of changing the air exhaust quantity of the fan is used for realizing that the pressure in the tube bundle box body is equal to the local atmospheric pressure, namely the pressure difference between the two is zero;
s5: when the signal sent by the pressure difference sensor is less than zero, namely the pressure in the tube bundle is higher than the atmospheric pressure, the rotating speed control device increases the rotating speed of the fan, increases the air suction amount and enables the pressure difference signal to return to zero;
when the signal sent by the differential pressure sensor is greater than zero, namely the pressure in the tube bundle is lower than the atmospheric pressure, the rotating speed of the fan is reduced, the air suction amount is reduced, the pressure in the tube bundle box is increased, and the differential pressure signal returns to zero. Thus, the pressure in the tube bundle is equal to the local atmospheric pressure, air cannot enter the tube bundle, the possibility that materials at higher temperature contact with oxygen to generate chemical reaction is eliminated, and peculiar smell gas is not generated; or the rotating speed of the fan is changed according to a signal given by the potentiometer or a signal sent by a computer, so that the steam extraction amount is changed, and the pressure in the tube bundle is equal to the local atmospheric pressure;
s6: conversely, the high pressure of the pressure difference sensor is connected into the tube bundle box body, the low pressure end is connected with the atmosphere, when the pressure difference signal is a positive value, namely the pressure in the tube bundle box body is higher than the local atmospheric pressure, the pressure control device of the tube bundle box body increases the rotating speed of the fan to increase the air suction volume so that the pressure in the tube bundle box body is reduced to the local atmospheric pressure to enable the pressure difference signal to return to zero; when the pressure difference signal is less than zero, namely the pressure in the tube bundle box body is lower than the local atmospheric pressure, the rotating speed of the fan is reduced to reduce the air suction amount, and the pressure in the tube bundle box body is increased to the local atmospheric pressure to enable the pressure difference signal to return to zero;
s7: a steam washing tower is arranged to wash the waste steam, and the waste steam is not added with alkali, so that only dust in the waste steam is removed, and dust pollution is eliminated;
s8: the waste steam after being washed is discharged into the atmosphere through a chimney;
s9: closing the waste steam straight discharge port of the pipe bundle when the fan works normally, and opening the straight discharge port when the fan cannot work normally;
s10: when the chimney is in normal operation, the air vent at the feeding end and the air vent at the discharging end are shielded or sealed, and the inserting plate in the waste steam direct exhaust air chimney is closed;
s11: and when no material is returned, closing the material returning plugboard.
The working process is as follows: when in operation, the cut-off valve 21 of the waste steam direct exhaust chimney 20 is closed, the vent hole 18 at the feeding end and the vent hole 11 at the discharging end are shielded or sealed, the material return cut-off valve 21 is closed when no material return exists, high-temperature and high-pressure raw steam is introduced through the steam inlet 17 of the tube bundle dryer 10, wet materials to be dried, such as fiber, germ and protein powder materials, enter from the feeding port 12, are turned over from bottom to top by the rotating tube bundle and are pushed to the discharging end from the feeding end, and are discharged from the discharging port 16 after being dried;
the steam heats the tube bundle, the heat is released to form condensed water which is discharged from a condensed water outlet 14; the evaporation steam generated in the drying process is sucked by the induced draft fan 40, discharged through the top of the tube bundle dryer 10, enters the steam washing tower 70 through the induced draft fan 40, is washed by the washing steam, enters the waste steam exhaust chimney 80 after washing, and is exhausted into the atmosphere;
the washing steam enters the waste steam washing from the steam washing tower, the temperature of the washing steam rises, the washing steam enters the flash tank 9 and is flashed into flash steam, and the flash steam is discharged to supply heat.
The flow of the air needs pressure to overcome the flow resistance, and because the passage of the air entering the tube bundle from the direct exhaust atmospheric chimney is closed by the tube bundle waste steam direct exhaust atmospheric chimney cut-off valve 21, the air inlet end vent 11 and the air outlet end vent 18 are closed at the moment, and the air can not enter the tube bundle from the vent holes;
the material return port 13 is closed by the cut-off valve 21 when no material is returned, air can not enter the tube bundle from the material return port 13, more importantly, the pressure difference between the waste steam pressure in the box body of the tube bundle drying box 10 and the atmosphere is measured on line at all times by the pressure difference wind power controller 60, a pressure difference signal is transmitted to the pressure difference wind power controller 60 at all times, the pressure difference wind power controller 60 adjusts the rotating speed of the induced draft fan 40 in time, namely, the air suction amount is adjusted, so that the waste steam pressure in the box body of the tube bundle drying box 10 is equal to the atmospheric pressure, namely, the pressure difference between the waste steam pressure and the atmospheric pressure is equal to zero, the working process of the tube bundle is stable, the working process of the tube bundle is not changed violently, the flow of fluid needs the pressure difference, the fluid can not flow due to the absence of the pressure difference or the small pressure difference which is not enough to overcome the flow resistance, therefore, the condition that the oxygen in the air can not enter the tube bundle drying machine 10, the surface contact with the dried material is eliminated, the possibility of generation of odor gas is eliminated, and odor pollution is eliminated.
Various modifications and variations of the present invention may be made by those skilled in the art, and they are also within the scope of the present invention provided they are within the scope of the claims of the present invention and their equivalents.
What is not described in detail in the specification is prior art that is well known to those skilled in the art.
Claims (9)
1. The utility model provides a system for eliminate tube bank desiccator exhaust steam peculiar smell condition which characterized in that: the system comprises a tube bundle dryer, a waste steam direct-exhaust atmospheric chimney, a shut-off valve, an induced draft fan, a pressure difference sensor, a pressure difference air quantity controller, a steam washing tower, a washed waste steam exhaust atmospheric chimney and a washed steam hot-water flash tank;
the tube bundle dryer is provided with a discharge end vent, a feed inlet, a return port, a condensate outlet, a discharge port, a steam inlet and a feed end vent;
one end of the upper shell of the tube bundle dryer is communicated with a waste steam direct-discharging atmosphere chimney and is used for directly discharging waste steam into the atmosphere;
the other end of the upper shell of the tube bundle dryer is communicated with an induced draft fan, the output end of the induced draft fan is communicated with a gas washing tower, the upper end of the gas washing tower is provided with a waste steam exhaust chimney after washing, and the other side of the gas washing tower is communicated with a flash tank;
one end of the differential pressure sensor is connected to the upper shell of the tube bundle, the other end of the differential pressure sensor is connected to the atmosphere, the pressure of the waste steam in the tube bundle is compared with the atmospheric pressure, the differential pressure of the waste steam and the atmospheric pressure is converted into an electric signal, and the output end of the differential pressure sensor is electrically connected with the differential pressure air quantity controller;
the air conditioner also comprises a differential pressure air volume controller which is electrically connected with the induced draft fan and is used for controlling the induced draft fan.
2. The system for deodorizing conditions in the exhaust stream of a tube bundle dryer as set forth in claim 1, wherein: the pressure air volume controller is a frequency converter with a PID function.
3. The system for deodorizing conditions in the exhaust stream of a tube bundle dryer as set forth in claim 1, wherein: the pressure difference air quantity controller comprises one of a PLC or a computer, the frequency converter is a driver at the moment, the control system is electrically connected with the pressure difference sensor, and the frequency converter is electrically connected with the induced draft fan.
4. The system for deodorizing conditions in the exhaust stream of a tube bundle dryer as set forth in claim 1, wherein: the pressure air quantity controller is a potentiometer, the potentiometer is electrically connected with a frequency converter, and the frequency converter is electrically connected with the induced draft fan.
5. The system for deodorizing conditions in the exhaust stream of a tube bundle dryer as set forth in claim 1, wherein: and the waste steam direct exhaust air chimney and the material returning port are provided with stop valves.
6. The system for deodorizing conditions in the exhaust stream of a tube bundle dryer as set forth in claim 1, wherein: the induced draft fan is one of a centrifugal type and a centrifugal axial flow mixed flow type.
7. The system for eliminating the exhaust steam odor condition of the tube bundle dryer as claimed in claim 1, wherein: the differential pressure sensor is a micro differential pressure type sensor.
8. The system for deodorizing conditions in the exhaust stream of a tube bundle dryer as set forth in claim 1, wherein: the stop valve is of a plug board type or a flap board type.
9. A method for eliminating the peculiar smell of waste steam of a tube bundle dryer is characterized in that: the method comprises the following steps:
s1: arranging an induced draft fan, and drying the evaporation steam, namely the waste steam generated in the wet material drying process by a suction pipe bundle;
s2: setting a micro differential pressure sensor and a differential pressure air quantity control device, wherein one end of the sensor is connected into the tube bundle box body, the other end of the sensor is connected with atmosphere, and converts differential pressure signals into electric signals which are transmitted to a frequency converter of the differential pressure air quantity control device or one of a PLC and a computer, and then one of the PLC or the computer sends instructions to the frequency converter according to a set program;
s3: arranging a frequency converter, receiving an electric signal sent by a differential pressure sensor or a PLC or a computer or given by a potentiometer, controlling the rotating speed of an induced draft fan according to one of the three, and changing the steam extraction quantity of the induced draft fan;
s4: the method of changing the steam extraction quantity of the induced draft fan is used for realizing that the pressure in the tube bundle box body is equal to the local atmospheric pressure, namely the pressure difference between the two is zero;
s5: when the low-pressure end of the pressure difference sensor is connected with the high-pressure end of the tube bundle and is connected with the atmosphere, and when a signal sent by the pressure difference sensor is smaller than zero, namely the pressure in the tube bundle is higher than the atmosphere pressure, the rotating speed control device increases the rotating speed of the fan, increases the steam extraction amount and enables the pressure difference signal to return to zero;
when the signal sent by the differential pressure sensor is greater than zero, namely the pressure in the tube bundle is lower than the atmospheric pressure, the rotating speed of the fan is reduced, the steam extraction amount is reduced, the pressure in the tube bundle box is increased, and the differential pressure signal returns to zero. Thus, the pressure in the tube bundle is equal to the local atmospheric pressure, air cannot enter the tube bundle, the possibility that materials with higher temperature contact with oxygen to generate chemical reaction is eliminated, and peculiar smell gas is not generated; or the rotating speed of the fan is changed according to a signal given by the potentiometer so as to change the steam extraction quantity to enable the pressure in the tube bundle to be equal to the local atmospheric pressure;
s6: conversely, the high-pressure end of the differential pressure sensor is connected into the tube bundle box body, the low-pressure end is connected with the atmosphere, and when the differential pressure signal is a positive value, namely the pressure in the tube bundle box body is higher than the local atmospheric pressure, the differential pressure air quantity control device increases the rotating speed of the fan to increase the steam extraction quantity so that the pressure in the tube bundle box body is reduced to the local atmospheric pressure to enable the differential pressure signal to return to zero; when the pressure difference signal is smaller than zero, namely the pressure in the tube bundle box body is lower than the local atmospheric pressure, the rotating speed of the fan is reduced to reduce the steam extraction amount, and the pressure in the tube bundle box body is increased to the local atmospheric pressure to enable the pressure difference signal to return to zero;
s7: a steam washing tower is arranged to wash the waste steam, and the waste steam is not added with alkali, so that only dust in the waste steam is removed, and dust pollution is eliminated;
s8: the washed waste steam is discharged into the atmosphere through a waste steam exhaust chimney after washing;
s9: when the fan works normally, the cut-off valve of the waste steam direct-exhaust air chimney of the pipe bundle is closed, and when the fan cannot work normally, the cut-off valve of the waste steam direct-exhaust air chimney is opened;
s10: when the device normally operates, the vent holes at the feeding end and the discharge end are shielded or closed, and the waste steam direct-exhaust air chimney cut-off valve is closed;
s11: and when no material return exists, closing the material return stop valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210792731.9A CN114993030A (en) | 2022-07-05 | 2022-07-05 | System and method for eliminating peculiar smell of waste steam of tube bundle dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210792731.9A CN114993030A (en) | 2022-07-05 | 2022-07-05 | System and method for eliminating peculiar smell of waste steam of tube bundle dryer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114993030A true CN114993030A (en) | 2022-09-02 |
Family
ID=83019798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210792731.9A Pending CN114993030A (en) | 2022-07-05 | 2022-07-05 | System and method for eliminating peculiar smell of waste steam of tube bundle dryer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114993030A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3508014C1 (en) * | 1985-03-07 | 1986-06-26 | Th. Goldschmidt Ag, 4300 Essen | Method for preventing the gas exchange at the inlet and outlet openings of a continuous drier as well as device for implementing the method |
| DE102010054493A1 (en) * | 2010-12-14 | 2012-06-14 | Hildebrand Holztechnik Gmbh | drying device |
| CN203672102U (en) * | 2013-11-18 | 2014-06-25 | 北京天达京丰技术开发有限公司 | Steam seasoning system |
| CN104654741A (en) * | 2013-11-18 | 2015-05-27 | 北京天达京丰技术开发有限公司 | Material drying device |
| CN105865191A (en) * | 2016-04-22 | 2016-08-17 | 天华化工机械及自动化研究设计院有限公司 | Method for vinasse tube bank type drying and exhaust gas and steam condensed liquid heat recycling |
| CN109847537A (en) * | 2018-12-24 | 2019-06-07 | 昆山名士电子科技有限公司 | A kind of emission-control equipment |
| CN110836596A (en) * | 2019-10-09 | 2020-02-25 | 宝鸡阜丰生物科技有限公司 | Method for utilizing waste heat in tube bundle drying process and application thereof |
| CN211977407U (en) * | 2020-01-07 | 2020-11-20 | 盐都华杰化纤机械有限公司 | Steam heating drying box with uniformly distributed internal airflow |
| CN112325601A (en) * | 2020-10-27 | 2021-02-05 | 崔顺甫 | Drying oven for preventing powder particles on surface of tablet from bonding by temperature control |
| CN113606015A (en) * | 2021-08-10 | 2021-11-05 | 北京工业大学 | Device and method for DPF active regeneration based on ozone |
-
2022
- 2022-07-05 CN CN202210792731.9A patent/CN114993030A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3508014C1 (en) * | 1985-03-07 | 1986-06-26 | Th. Goldschmidt Ag, 4300 Essen | Method for preventing the gas exchange at the inlet and outlet openings of a continuous drier as well as device for implementing the method |
| DE102010054493A1 (en) * | 2010-12-14 | 2012-06-14 | Hildebrand Holztechnik Gmbh | drying device |
| CN203672102U (en) * | 2013-11-18 | 2014-06-25 | 北京天达京丰技术开发有限公司 | Steam seasoning system |
| CN104654741A (en) * | 2013-11-18 | 2015-05-27 | 北京天达京丰技术开发有限公司 | Material drying device |
| CN105865191A (en) * | 2016-04-22 | 2016-08-17 | 天华化工机械及自动化研究设计院有限公司 | Method for vinasse tube bank type drying and exhaust gas and steam condensed liquid heat recycling |
| CN109847537A (en) * | 2018-12-24 | 2019-06-07 | 昆山名士电子科技有限公司 | A kind of emission-control equipment |
| CN110836596A (en) * | 2019-10-09 | 2020-02-25 | 宝鸡阜丰生物科技有限公司 | Method for utilizing waste heat in tube bundle drying process and application thereof |
| CN211977407U (en) * | 2020-01-07 | 2020-11-20 | 盐都华杰化纤机械有限公司 | Steam heating drying box with uniformly distributed internal airflow |
| CN112325601A (en) * | 2020-10-27 | 2021-02-05 | 崔顺甫 | Drying oven for preventing powder particles on surface of tablet from bonding by temperature control |
| CN113606015A (en) * | 2021-08-10 | 2021-11-05 | 北京工业大学 | Device and method for DPF active regeneration based on ozone |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110207484B (en) | Material drying evaporation gas recycling system and method | |
| CN114993030A (en) | System and method for eliminating peculiar smell of waste steam of tube bundle dryer | |
| CN203878071U (en) | Negative pressure exhaust food waste treatment device | |
| CN207031224U (en) | A kind of sludge rapid drying equipment | |
| CN108264209A (en) | Sludge dry system and method | |
| CN201246977Y (en) | Waste heat recovery utilizing apparatus of steam injecting vacuum pump | |
| CN207439063U (en) | A kind of material drying device with sterilizing function | |
| CN216049031U (en) | Drying and ventilating system | |
| CN203878076U (en) | Humidity detection negative pressure exhaust kitchen waste treatment device | |
| CN207515477U (en) | Slime drying device | |
| CN112325600B (en) | A paint slag drying system and control method | |
| CN211823629U (en) | A desiccator for plastic production | |
| CN211635990U (en) | Waste incineration flue gas treatment device | |
| CN207805273U (en) | Throwing host humidity discharging exhaust treatment system | |
| CN209185581U (en) | Fumigator energy circulating box | |
| CN111659234A (en) | Compost fermentation tail gas emission reduction system based on heat pump technology | |
| CN115183571A (en) | Equipment and method for eliminating waste gas peculiar smell of tube bundle dryer | |
| CN206755804U (en) | A kind of chemical experiment medicine drying device | |
| CN203947014U (en) | A kind of gas-recycling plant for sludge drying chamber | |
| CN209735246U (en) | Water film dust pelletizing system of sodium chlorite | |
| CN213631331U (en) | Energy-conserving lacquer sediment drying-machine device and system | |
| CN219757011U (en) | Chemical energy-saving heat recovery structure | |
| CN219463001U (en) | Biological environment-friendly box capable of actively cooling | |
| CN204897687U (en) | Solar energy sludge treatment equipment | |
| CN217490330U (en) | Vacuum pump waste gas peculiar smell processing apparatus |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220902 |
|
| WD01 | Invention patent application deemed withdrawn after publication |