CN115738630B - System and method for cooling and desulfurizing waste gas - Google Patents
System and method for cooling and desulfurizing waste gas Download PDFInfo
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- CN115738630B CN115738630B CN202211525127.6A CN202211525127A CN115738630B CN 115738630 B CN115738630 B CN 115738630B CN 202211525127 A CN202211525127 A CN 202211525127A CN 115738630 B CN115738630 B CN 115738630B
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- 238000001816 cooling Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000002912 waste gas Substances 0.000 title claims description 38
- 230000003009 desulfurizing effect Effects 0.000 title claims description 13
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 164
- 230000023556 desulfurization Effects 0.000 claims abstract description 164
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 238000001802 infusion Methods 0.000 claims abstract description 19
- 239000007789 gas Substances 0.000 claims description 62
- 239000007921 spray Substances 0.000 claims description 30
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 238000011010 flushing procedure Methods 0.000 claims description 12
- 238000010992 reflux Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 5
- 238000000889 atomisation Methods 0.000 claims description 2
- 230000008859 change Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 60
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 30
- 238000000926 separation method Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- -1 contains SiO2 Chemical compound 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The invention provides an exhaust gas cooling desulfurization system and method, comprising the following steps: the liquid storage tank is communicated with the desulfurization tank through an infusion pipeline, the infusion pipeline comprises a first pipeline, a water distributor and a plurality of second pipelines, the backwash pipeline comprises a third pipeline and a fourth pipeline, one end of the third pipeline is communicated with the liquid storage tank, the other end of the third pipeline is communicated with the rear section of the first pipeline, one end of the fourth pipeline is communicated with the water distributor, the other end of the fourth pipeline is communicated with the front section of the first pipeline, the rear section of the first pipeline is provided with an execution device, and the beneficial effects brought by the technical scheme of the invention at least comprise: the back flush pipeline is arranged, the desulfurization solution flows in from the back flush pipeline, enters the infusion pipeline, returns to the liquid storage tank from the infusion pipeline, and is washed once, so that the desulfurization solution can be effectively prevented from crystallizing.
Description
Technical Field
The application relates to the technical field of waste gas treatment, in particular to a waste gas cooling and desulfurizing system and a method.
Background
The high-temperature flue gas is generated in the smelting process of the industrial silicon electric furnace, the flue gas mainly contains SiO2, fe2O3, CO, N2, SO2 and the like, along with the improvement of people's knowledge of sulfur dioxide and dust pollution, strict emission standards are implemented in various places, various absorption devices are applied to an exhaust gas cooling desulfurization system, and the wet-process exhaust gas cooling desulfurization system widely adopted at present mainly comprises a spray tower, a cyclone plate tower, a bubbling tower, a Venturi and the like, or adopts a combination tower to further improve the desulfurization working efficiency, such as Venturi+cyclone plate tower combination and spray+tray combination.
At present, a NaOH solution is generally adopted for desulfurization operation, but the concentration of SO2 in waste gas is not at a high point for a long time, when the concentration of SO2 is low, the waste gas is still desulfurized by using a fixed frequency and solution amount, SO that a lot of resources are wasted, and the desulfurization cost is high.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a method for cooling and desulfurizing exhaust gas, which is used for solving the problem that when the concentration of SO2 is low, the exhaust gas is still desulfurized with a fixed frequency and a fixed solution amount, SO that a lot of resources are wasted in the prior art.
To achieve the above and other related objects, the present invention provides a method for cooling desulfurization of exhaust gas, comprising:
introducing desulfurization solution in the liquid storage tank into the desulfurization tank through a transfusion pipeline to desulfurize waste gas, and arranging a return pipeline on the transfusion pipeline;
an execution device for adjusting flow and pressure is arranged on the infusion pipeline, and an adjusting device for adjusting flow is arranged on the return pipeline;
The exhaust gas temperature and the SO2 concentration in the desulfurization tank are obtained, and the execution means and the adjustment means are controlled based on the changes in the exhaust gas temperature and the SO2 concentration.
Optionally, the controlling the recirculation of the desulfurization solution based on the changes in the exhaust gas temperature and the SO2 concentration includes:
when the temperature of the waste gas in the desulfurization tank is greater than the lowest set value or the SO2 concentration exceeds the lowest set value, executing the low-frequency operation of the device, adjusting the opening of the device to be 100%, and maximizing the reflux flow of the desulfurization solution;
When the temperature of the waste gas in the desulfurization tank is higher than the lowest set value and the SO2 concentration exceeds the set value, executing low-frequency operation of the device, gradually reducing the opening of the regulating device until the temperature in the desulfurization tank is lower than the first set value and the SO2 concentration is lower than the first set value, and gradually reducing the reflux flow of the desulfurization solution;
When the temperature of the waste gas in the desulfurization tank is higher than the lowest set value and the SO2 concentration exceeds the second set value, the regulating device is completely closed, the executing device gradually increases the frequency until the temperature in the desulfurization tank is lower than the second set value and the SO2 concentration is lower than the second set value, and the reflux flow of the desulfurization solution is zero;
when the temperature of the waste gas in the desulfurization tank is greater than the lowest set value and the SO2 concentration exceeds the set value III, the regulating device is completely closed, the executing device runs at full load, the flow rate of the desulfurization solution is zero, and if the SO2 concentration is maintained at a high level, the concentration of the desulfurization solution is increased.
Optionally, the exhaust gas cooling desulfurization method further comprises:
When the system is in a stop state or a standby state, a back flushing function is started to back flush the infusion pipeline.
Optionally, back flushing the infusion line comprises:
The infusion pipeline comprises a first pipeline, a water separator and a second pipeline, the water separator is communicated with the liquid storage tank through the first pipeline, and then the water separator is communicated with the desulfurization tank through the second pipeline;
a third pipeline is connected in parallel with the rear section of the first pipeline, a fourth pipeline is connected in parallel with the front section of the first pipeline, the third pipeline is communicated with the liquid storage tank, the fourth pipeline penetrates through the water separator, a first valve is arranged on the first pipeline, second valves are arranged on the third pipeline and the fourth pipeline, the first valve is positioned between the third pipeline and the fourth pipeline, and the executing device is arranged on the rear section of the first pipeline;
when back flushing is carried out, the first valve on the first pipeline is closed, the desulfurization solution enters the first pipeline from the third pipeline, the desulfurization solution is pressurized by the execution device, then enters the water separator to back flush the water separator, the desulfurization solution returns to the front section of the first pipeline through the fourth pipeline, back flushing is carried out on the front section of the first pipeline, and finally the desulfurization solution after back flushing returns to the liquid storage tank.
Optionally, the exhaust gas cooling desulfurization method further comprises the step of atomizing a desulfurization solution:
the second pipeline is provided with a spray cavity for atomizing the desulfurization solution, and is also provided with an air input device and a gas transmission pipeline, wherein the gas transmission pipeline communicates the air output device with the spray cavity;
Compressed air is output from the air input device, reaches the spray cavity through the gas pipeline and is mixed with the desulfurization solution, the compressed air atomizes the desulfurization solution in the spray cavity, and the atomized desulfurization solution is sprayed into the desulfurization tank.
Optionally, a fifth pipeline and a sixth pipeline are arranged on the first pipeline in parallel, third valves are arranged on the first pipeline, the fifth pipeline and the sixth pipeline,
When the first pipeline is blocked, the third valve on the first pipeline is closed, the third valve on the fifth pipeline or the sixth pipeline is opened, and the desulfurization solution is conveyed from the fifth pipeline or the sixth pipeline;
When the fifth pipeline is blocked, the third valve on the fifth pipeline is closed, the third valve on the first pipeline or the sixth pipeline is opened, and the desulfurization solution is conveyed from the first pipeline or the sixth pipeline;
when the sixth pipeline is blocked, the third valve on the sixth pipeline is closed, the third valve on the first pipeline or the fifth pipeline is opened, and the desulfurization solution is conveyed from the first pipeline or the fifth pipeline.
Optionally, the exhaust gas cooling desulfurization method further comprises:
the second pipelines, the spray cavity and the gas pipeline are arranged in a plurality of consistent quantity, and the second pipelines are uniformly arranged on the side wall of the desulfurization tank, so that atomized desulfurization solution is more uniformly sprayed in the desulfurization tank;
and the gas pipelines are provided with control devices, and the control devices are adjusted 5 based on the temperature of the waste gas.
Optionally, the exhaust gas cooling desulfurization method further comprises:
When the temperature of the exhaust gas is lower than the lowest set value, the system alarms and automatically stops.
Optionally, a storage tank is further arranged beside the desulfurization tank, the storage tank is communicated with the desulfurization tank, and desulfurization substances in the storage tank are input into the desulfurization tank for desulfurization.
An exhaust gas cooling desulfurization system for implementing any one of the above cooling desulfurization methods.
As described above, the technical solution of the present invention at least includes:
1. and the flow of the desulfurization solution can be reduced when the concentration of SO2 in the waste gas is low by controlling the flow of the return pipeline, SO that the cost of cooling and desulfurizing the waste gas is saved.
5 2. Set up transfer line, gas-supply pipeline and spout the chamber, desulfurization solution and compressed air are spouting the intracavity and mixing, and compressed air atomizes desulfurization solution, spouts the desulfurization solution after atomizing again into the digester, and the desulfurization solution after atomizing is more abundant with the contact of waste gas to solution heat absorption effect after atomizing is better, can effectively reduce the temperature of waste gas, more is convenient for follow-up purification treatment to the waste gas.
Drawings
FIG. 1 shows a process flow diagram of an exemplary embodiment of the present invention;
fig. 2 shows a schematic view of the structure of a backwash pipeline according to an exemplary embodiment of the present invention.
Description of the part reference numerals
1. A desulfurizing tank; 2. a liquid storage tank; 3. an air input device; 4. an infusion tube; 5. a spray cavity; 6. a gas line; 7. a first pipeline; 8. a water separator; 9. a second pipeline; 10. a seventh pipeline; 11. an air separator; 12. an eighth pipeline; 13. a variable frequency centrifugal pump; 14. a return line; 15. a flow regulating valve; 16. a third pipeline; 17. a fourth pipeline; 18. a fifth pipeline; 19. a sixth pipeline; 20. a filter; 21. a filter screen; 22. and a storage bin.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
The portion of the first pipe 7 close to the reservoir 2 is designated as a front stage, and the portion of the first pipe 7 close to the water separator 8 is designated as a rear stage.
Fig. 1 is a process flow chart of an exemplary embodiment of the present application, please refer to fig. 1, the present application provides an exhaust gas cooling desulfurization system, which includes a desulfurization tank 1, a liquid storage tank 2 and an air input device 3, the desulfurization tank 1 is used for allowing a desulfurization solution to react with SO2 to perform desulfurization, the desulfurization solution is filled in the liquid storage tank 2, in this embodiment, naOH solution is selected for desulfurization, the liquid storage tank 2 is communicated with the desulfurization tank 1 through a transfusion pipeline 4, naOH solution is conveyed into the desulfurization tank 1 through transfusion management, a spray cavity 5 is provided on the transfusion pipeline 4, the air input device 3 is used for inputting compressed air, the air input device 3 is communicated with the spray cavity 5 through a gas pipeline 6, naOH solution is conveyed into the spray cavity 5 through the transfusion pipeline 4, the compressed air is atomized in the spray cavity 5, and finally sprayed into the desulfurization tank 1 through the end of the transfusion pipeline 4 to perform desulfurization on industrial exhaust gas, and a backwash pipeline is further provided, when the transfusion pipeline 4 is blocked by crystallization of NaOH solution or stopped in the whole device, naOH solution flows into the backwash pipeline 4 to the transfusion pipeline 4 to prevent the transfusion pipeline 4 from being blocked.
Further, the infusion pipeline 4 comprises a first pipeline 7, a water separator 8 and three second pipelines 9, one end of the first pipeline 7 is communicated with the liquid storage tank 2, the other end of the first pipeline 7 is communicated with the water separator 8, three water separation joints are arranged on the water separator 8, the three water separation joints are respectively communicated with one ends of the three second pipelines 9, the three second pipelines 9 are respectively communicated with the desulfurization tank 1, each second pipeline 9 is provided with a spray cavity 5, the air pipeline 6 comprises a seventh pipeline 10, a gas separator 11 and three eighth pipelines 12, one end of the seventh pipeline 10 is communicated with the air input device 3, the other end of the seventh pipeline 10 is communicated with the gas separator 11, three gas separation ports are arranged on the gas separator 11, the three gas separation ports are respectively communicated with one ends of the three eighth pipelines 12, the other ends of the three eighth pipelines 12 are respectively communicated with the three spray cavities 5, the spray cavities are arranged to realize more uniform desulfurization, the number of the gas separation ports, the water separation structures, the second pipelines and the eighth pipelines are not limited to be three, and the rest numbers are also applicable to the application.
Further, the executing device can adopt the variable frequency centrifugal pump 13, the variable frequency centrifugal pump 13 is arranged on the first pipeline 7, the second variable frequency centrifugal pump 13 is further arranged on the first pipeline 7 in parallel, when the executing device is used, only one variable frequency centrifugal pump 13 is started, the other variable frequency centrifugal pump 13 is used as a standby, and thus, if one variable frequency centrifugal pump 13 is damaged or blocked, the other variable frequency centrifugal pump 13 is started, and the efficiency of cooling and desulfurizing the waste gas is not affected.
Further, a return pipeline 14 is further arranged on the infusion pipeline 4, one end of the return pipeline 14 is communicated with the liquid storage tank 2, the other end of the return pipeline 14 is communicated with the first pipeline 7, and a flow regulating valve 15 is further arranged on the return pipeline 14 and used for controlling the return flow.
Fig. 2 is a schematic diagram of a back flush pipeline structure shown in an exemplary embodiment of the present application, please refer to fig. 2, the back flush pipeline includes a third pipeline 16 and a fourth pipeline 17, one end of the third pipeline 16 is communicated with the liquid storage tank 2, the other end of the third pipeline 16 is communicated with the first pipeline 7, one end of the fourth pipeline 17 is communicated with the water separator 8, the other end of the fourth pipeline 17 is communicated with the first pipeline 7, and the communication position of the fourth pipeline 17 and the first pipeline 7 is located between the liquid storage tank 2 and the communication position of the third pipeline 16 and the first pipeline 7, that is, the communication position of the fourth pipeline 17 and the first pipeline 7 is arranged near the liquid storage tank 2, and a first valve is arranged between the communication position of the fourth pipeline 17 and the first pipeline 7 and the communication position of the third pipeline 16 and the first pipeline 7, and second valves are respectively arranged on the fourth pipeline 17 and the third pipeline 16, and when back flush is performed, the two second valves are opened, the first valves are closed, that is, the desulfurization solution can not flow into the first pipeline 7 from the third pipeline 16 to the first pipeline 7, and then flow into the second pipeline 7 from the first pipeline 7 to the second pipeline 7, and the second pipeline 8 from the second pipeline 7 can not flow into the first pipeline 7, and the second pipeline 8, and the water can not flow into the second pipeline 7 from the first pipeline 7, and the second pipeline can not flow into the second pipeline 7, and the second pipeline from the second pipeline 8, and the water separator 8, the water separator can not flow from the first pipeline 7, and the second pipeline 7, and the water channel can be the water, the waste flow from the second pipeline and the second pipeline can and the water, and the second pipeline can be the water.
Optionally, a fifth pipeline 18 and a sixth pipeline 19 are arranged on the front section of the first pipeline 7 in parallel, the fifth pipeline 18 and the sixth pipeline 19 are located between the liquid storage tank 2 and the communicating positions of the fourth pipeline 17 and the first pipeline 7, a filter 20 and a third valve are arranged on the first pipeline 7, the fifth pipeline 18 and the sixth pipeline 19, and in normal operation, the third valves on the fifth pipeline 18 and the sixth pipeline 19 are in a closed state, naOH solution enters the water separator 8 from the first pipeline 7, and when the filter 20 of any one of the first pipeline 7, the fifth pipeline 18 and the sixth pipeline 19 needs maintenance, the corresponding third valve is closed, so that the desulfurization solution passes through other pipelines, and the filter 20 needing maintenance can be maintained.
Further, a filter screen 21 is also arranged at the joint of the liquid storage tank 2 and the first pipeline 7.
Further, a storage bin 22 is further arranged, naHCO3 is arranged in the storage bin 22, and the storage bin 22 is communicated with the desulfurization tank 1 through a conveying pipe.
According to the working principle, a variable frequency centrifugal pump 13 is opened, naOH solution enters a first pipeline 7 from a liquid storage tank 2 and then enters a water separator 8 for diversion, the diverted NaOH solution respectively enters three second pipelines 9 and enters a spray cavity 5, compressed air is input into an air input device 3, the compressed air enters a seventh pipeline 10 and then enters a gas separator 11, the diverted compressed air respectively enters three eighth pipelines 12, the compressed air also enters the spray cavity 5, the compressed air atomizes the NaOH solution, the atomized NaOH solution is sprayed into a desulfurization tank 1 along with the compressed air, the NaOH solution and SO2 perform desulfurization reaction, meanwhile, the atomized NaOH solution absorbs the heat of waste gas for gasification, the temperature of the waste gas is reduced, the subsequent purification is facilitated, and meanwhile, naHCO3 is input into a storage bin 22 for performing desulfurization reaction on the SO2, and the desulfurization effect is better;
When the first pipeline 7 needs to be washed to avoid crystallization, the first valve is closed, so that NaOH solution enters the water separator 8 from the third pipeline 16 to wash the water separator 8, then enters the fourth pipeline 17, finally enters the first pipeline 7 to wash the first pipeline 7.
The invention also provides an exhaust gas cooling and desulfurizing method, which is based on the exhaust gas cooling and desulfurizing system and comprises the following steps:
Introducing the desulfurization solution in the liquid storage tank 2 into the desulfurization tank 1 through the infusion pipeline 4 to desulfurize waste gas, and arranging a return pipeline 14 on the infusion pipeline 4;
An execution device for adjusting the flow rate and the pressure is arranged on the infusion pipeline 4, and an adjusting device for adjusting the flow rate is arranged on the return pipeline 14;
The exhaust gas temperature and the SO2 concentration in the desulfurization tank 1 are obtained, and the execution means and the adjustment means are controlled based on the changes in the exhaust gas temperature and the SO2 concentration.
The execution device can adopt a variable frequency centrifugal pump 13, the adjustment device can adopt a flow adjusting valve 15, and a temperature sensor and an SO2 detection instrument are arranged in the desulfurization tank to obtain the temperature of the waste gas and the concentration of SO 2.
In one embodiment of the application, specifically, the controlling of the recirculation of the desulfurization solution based on the changes in the exhaust gas temperature and the SO2 concentration comprises:
when the temperature of the waste gas in the desulfurization tank 1 is greater than the lowest set value or the SO2 concentration exceeds the lowest set value, the variable frequency centrifugal pump 13 operates at low frequency, the opening of the flow regulating valve 15 is 100%, and the flow of the desulfurization solution is the largest;
When the temperature of the waste gas in the desulfurization tank 1 is higher than the lowest set value and the SO2 concentration exceeds the set value, the variable frequency centrifugal pump 13 operates at low frequency, the opening of the flow regulating valve 15 is gradually reduced until the temperature in the desulfurization tank is lower than the set value I and the SO2 concentration is lower than the set value I, and the reflux flow of the desulfurization solution is gradually reduced;
When the temperature of the waste gas in the desulfurization tank 1 is higher than the lowest set value and the SO2 concentration exceeds the second set value, the flow regulating valve 15 is completely closed, the frequency conversion centrifugal pump 13 gradually increases the frequency until the temperature in the desulfurization tank is lower than the second set value and the SO2 concentration is lower than the second set value, and the reflux flow of the desulfurization solution is zero;
When the temperature of the waste gas in the desulfurization tank 1 is higher than the lowest set value and the SO2 concentration exceeds the set value III, the flow regulating valve 15 is completely closed, the variable frequency centrifugal pump 13 runs at full load, the flow rate of the desulfurization solution is zero, and if the SO2 concentration is maintained at a high level, the concentration of the desulfurization solution is increased.
In one embodiment of the application, the exhaust gas cooling desulfurization method further comprises:
When the system is in a stop state or a standby state, a back flushing function is started to back flush the infusion pipeline 4.
In one embodiment of the present application, the flushing of the infusion line 4 specifically comprises: closing the first valve, opening the two second valves, allowing desulfurization solution to enter from the third pipeline 16, passing through the rear section of the first pipeline 7, pressurizing by the execution device, entering into the water separator 8, flowing into the fourth pipeline 17 from the water separator 8, flowing into the front section of the first pipeline 7 from the fourth pipeline 17, and finally returning to the liquid storage tank 2 to finish back flushing.
In one embodiment of the present application, in particular, the exhaust gas cooling desulfurization method further includes subjecting the desulfurization solution to atomization treatment:
A spray cavity 5 for atomizing the desulfurization solution is arranged on the second pipeline 9, and an air input device 3 and a gas pipeline 6 are also arranged, wherein the gas pipeline 6 communicates the air output device 3 with the spray cavity 5;
Compressed air is output from the air input device 3, reaches the spray cavity 5 through the air pipeline 6 and is mixed with the desulfurization solution, the compressed air atomizes the desulfurization solution in the spray cavity 5, and the atomized desulfurization solution is sprayed into the desulfurization tank 1.
The gas transmission pipeline 6 comprises a seventh pipeline 10, a gas distributor 11 and three eighth pipelines 12, one end of the seventh pipeline 10 is communicated with the air input device 3, the other end of the seventh pipeline 10 is communicated with the gas distributor 11, three gas distribution ports are formed in the gas distributor 11 and are respectively communicated with one ends of the three eighth pipelines 12, the other ends of the three eighth pipelines 12 are respectively communicated with the three spraying cavities 5, so that the spraying is more uniform, the desulfurization is more thorough, and the number of the gas distribution ports, the water distribution structure, the second pipelines and the eighth pipelines is not limited to three, and the rest of the number is applicable to the application.
Further, a fifth valve is arranged on each eighth pipeline 12, when the temperature change of the waste gas in the desulfurization tank is detected, the fifth valve can be regulated to regulate the inlet amount of compressed air, and the amount of desulfurization solution entering the desulfurization tank is controlled;
when the opening of the fifth valve is larger, the content of compressed air entering the spray cavity 5 is more, so that the desulfurization solution in the second pipeline 9 enters the spray cavity 5 to form a barrier, the entering amount of the desulfurization solution is reduced, and the flow of the desulfurization solution entering the desulfurization tank is reduced;
When the opening of the fifth valve is smaller, the content of compressed air entering the spray cavity 5 is smaller, the obstruction of the desulfurization solution entering the spray cavity 5 is smaller, and the flow of the desulfurization solution entering the desulfurization tank is increased.
In one embodiment of the application, a fifth pipeline 18 and a sixth pipeline 19 are arranged on the first pipeline 7 in parallel, and third valves are arranged on the first pipeline 7, the fifth pipeline 18 and the sixth pipeline 19;
When the first pipeline 7 is blocked, a third valve on the first pipeline 7 is closed, a third valve on a fifth pipeline 18 or a sixth pipeline 19 is opened, and the desulfurization solution is conveyed from the fifth pipeline 18 or the sixth pipeline 19;
When the fifth pipeline 18 is blocked, a third valve on the fifth pipeline 18 is closed, a third valve on the first pipeline 7 or the sixth pipeline 19 is opened, and the desulfurization solution is conveyed from the first pipeline 7 or the sixth pipeline 19;
when the sixth pipeline 19 is blocked, the third valve on the sixth pipeline 19 is closed, and the third valve on the first pipeline 7 or the fifth pipeline 18 is opened, so that the desulfurization solution is conveyed from the first pipeline 7 or the fifth pipeline 18.
In one embodiment of the present application, in particular, the exhaust gas cooling desulfurization method further includes:
When the temperature of the waste gas is lower than the lowest set value, the system alarms and automatically stops, so that waste caused by the fact that the desulfurizing solution is conveyed in the desulfurizing tank when no waste gas exists in the desulfurizing tank is avoided.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (6)
1. A method for cooling and desulfurizing exhaust gas, comprising:
introducing desulfurization solution in the liquid storage tank into the desulfurization tank through a transfusion pipeline to desulfurize waste gas, and arranging a return pipeline on the transfusion pipeline;
an execution device for adjusting flow and pressure is arranged on the infusion pipeline, and an adjusting device for adjusting flow is arranged on the return pipeline;
A temperature sensor and an SO2 detection instrument are arranged in the desulfurization tank to acquire the temperature of the waste gas and the concentration of SO2, the temperature of the waste gas and the concentration of SO2 in the desulfurization tank are acquired, and the execution device and the regulating device are controlled based on the change generated by the temperature of the waste gas and the concentration of SO 2;
The controlling of the back flow of the desulfurization solution based on the changes in the exhaust gas temperature and the SO2 concentration includes:
when the temperature of the waste gas in the desulfurization tank is greater than the lowest set value or the SO2 concentration exceeds the lowest set value, executing the low-frequency operation of the device, adjusting the opening of the device to be 100%, and maximizing the reflux flow of the desulfurization solution;
When the temperature of the waste gas in the desulfurization tank is higher than the lowest set value and the SO2 concentration exceeds the set value, executing low-frequency operation of the device, gradually reducing the opening of the regulating device until the temperature in the desulfurization tank is lower than the first set value and the SO2 concentration is lower than the first set value, and gradually reducing the reflux flow of the desulfurization solution;
When the temperature of the waste gas in the desulfurization tank is higher than the lowest set value and the SO2 concentration exceeds the second set value, the regulating device is completely closed, the executing device gradually increases the frequency until the temperature in the desulfurization tank is lower than the second set value and the SO2 concentration is lower than the second set value, and the reflux flow of the desulfurization solution is zero;
When the temperature of the waste gas in the desulfurization tank is higher than the lowest set value and the SO2 concentration exceeds the third set value, the regulating device is completely closed, the executing device runs at full load, the flow rate of the desulfurization solution is zero, and if the SO2 concentration is maintained at a high level, the concentration of the desulfurization solution is increased;
When the system is in a stop state or a standby state, a back flushing function is started to back flush the infusion pipeline;
The infusion pipeline comprises a first pipeline, a water separator and a second pipeline, the water separator is communicated with the liquid storage tank through the first pipeline, and then the water separator is communicated with the desulfurization tank through the second pipeline;
a third pipeline is connected in parallel with the rear section of the first pipeline, a fourth pipeline is connected in parallel with the front section of the first pipeline, the third pipeline is communicated with the liquid storage tank, the fourth pipeline penetrates through the water separator, a first valve is arranged on the first pipeline, second valves are arranged on the third pipeline and the fourth pipeline, the first valve is positioned between the third pipeline and the fourth pipeline, and the executing device is arranged on the rear section of the first pipeline;
when back flushing is carried out, the first valve on the first pipeline is closed, the desulfurization solution enters the first pipeline from the third pipeline, the desulfurization solution is pressurized by the execution device, then enters the water separator to back flush the water separator, the desulfurization solution returns to the front section of the first pipeline through the fourth pipeline, back flushing is carried out on the front section of the first pipeline, and finally the desulfurization solution after back flushing returns to the liquid storage tank.
2. The exhaust gas cooling desulfurization method according to claim 1, characterized in that the exhaust gas cooling desulfurization method further comprises subjecting a desulfurization solution to atomization treatment:
the second pipeline is provided with a spray cavity for atomizing the desulfurization solution, and is also provided with an air input device and a gas transmission pipeline, wherein the gas transmission pipeline communicates the air output device with the spray cavity;
Compressed air is output from the air input device, reaches the spray cavity through the gas pipeline and is mixed with the desulfurization solution, the compressed air atomizes the desulfurization solution in the spray cavity, and the atomized desulfurization solution is sprayed into the desulfurization tank.
3. The exhaust gas cooling desulfurization method according to claim 2, characterized in that:
a fifth pipeline and a sixth pipeline are arranged on the first pipeline in parallel, third valves are arranged on the first pipeline, the fifth pipeline and the sixth pipeline,
When the first pipeline is blocked, the third valve on the first pipeline is closed, the third valve on the fifth pipeline or the sixth pipeline is opened, and the desulfurization solution is conveyed from the fifth pipeline or the sixth pipeline;
When the fifth pipeline is blocked, the third valve on the fifth pipeline is closed, the third valve on the first pipeline or the sixth pipeline is opened, and the desulfurization solution is conveyed from the first pipeline or the sixth pipeline;
when the sixth pipeline is blocked, the third valve on the sixth pipeline is closed, the third valve on the first pipeline or the fifth pipeline is opened, and the desulfurization solution is conveyed from the first pipeline or the fifth pipeline.
4. The exhaust gas cooling desulfurization method according to claim 2, characterized in that the exhaust gas cooling desulfurization method further comprises:
the second pipelines, the spray cavity and the gas pipeline are arranged in a plurality of consistent quantity, and the second pipelines are uniformly arranged on the side wall of the desulfurization tank, so that atomized desulfurization solution is more uniformly sprayed in the desulfurization tank;
and the gas pipelines are provided with control devices, and the control devices are regulated based on the temperature of the waste gas.
5. The exhaust gas cooling desulfurization method according to claim 1, characterized in that the exhaust gas cooling desulfurization method further comprises:
When the temperature of the exhaust gas is lower than the lowest set value, the system alarms and automatically stops.
6. The exhaust gas cooling desulfurization method according to claim 1, characterized in that:
And a storage tank is arranged beside the desulfurization tank, the storage tank is communicated with the desulfurization tank, and desulfurization substances in the storage tank are input into the desulfurization tank for desulfurization.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08126814A (en) * | 1994-10-31 | 1996-05-21 | Babcock Hitachi Kk | Wet type flue gas desulfurizer and method therefor |
| CN103831001A (en) * | 2014-02-28 | 2014-06-04 | 唐山梦牌瓷业有限公司 | Flue gas purification device for gas firing furnace |
| CN105080329A (en) * | 2015-09-01 | 2015-11-25 | 中冶焦耐工程技术有限公司 | Dust removal and flue gas desulfurization and purification process and device for coke oven |
| CN106076100A (en) * | 2016-08-08 | 2016-11-09 | 浙江大学 | A kind of coal-fired flue-gas semidry method takes off the desulfurization wastewater Zero discharging system of fluorine and chlorine removal |
| CN207169406U (en) * | 2017-08-25 | 2018-04-03 | 鞍钢股份有限公司 | Desulfurization slurry reflux system with pressure relief device |
| CN109107369A (en) * | 2018-09-04 | 2019-01-01 | 北京慧峰仁和科技股份有限公司 | SO in a kind of flue gas3Removing system and method |
| CN208320437U (en) * | 2018-01-18 | 2019-01-04 | 福建龙净环保股份有限公司 | A kind of coal-fired plant flue gas SO3Removing system |
| KR102038950B1 (en) * | 2018-05-10 | 2019-10-31 | 주식회사 파나시아 | Flue Gas Cleaning Liquid Purification System |
| CN110756032A (en) * | 2019-10-22 | 2020-02-07 | 武汉天空蓝环保科技有限公司 | SO in flue gas3Desorption system and desorption method |
| CN212156660U (en) * | 2020-04-24 | 2020-12-15 | 大唐环境产业集团股份有限公司 | Solution conveying device |
| CN216498256U (en) * | 2021-11-03 | 2022-05-13 | 国能铜陵发电有限公司 | Desulfurization dust pelletizing system |
| CN219462991U (en) * | 2022-11-29 | 2023-08-04 | 重庆凯杰林环保工程有限公司 | Waste gas desulfurization device |
-
2022
- 2022-11-29 CN CN202211525127.6A patent/CN115738630B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08126814A (en) * | 1994-10-31 | 1996-05-21 | Babcock Hitachi Kk | Wet type flue gas desulfurizer and method therefor |
| CN103831001A (en) * | 2014-02-28 | 2014-06-04 | 唐山梦牌瓷业有限公司 | Flue gas purification device for gas firing furnace |
| CN105080329A (en) * | 2015-09-01 | 2015-11-25 | 中冶焦耐工程技术有限公司 | Dust removal and flue gas desulfurization and purification process and device for coke oven |
| CN106076100A (en) * | 2016-08-08 | 2016-11-09 | 浙江大学 | A kind of coal-fired flue-gas semidry method takes off the desulfurization wastewater Zero discharging system of fluorine and chlorine removal |
| CN207169406U (en) * | 2017-08-25 | 2018-04-03 | 鞍钢股份有限公司 | Desulfurization slurry reflux system with pressure relief device |
| CN208320437U (en) * | 2018-01-18 | 2019-01-04 | 福建龙净环保股份有限公司 | A kind of coal-fired plant flue gas SO3Removing system |
| KR102038950B1 (en) * | 2018-05-10 | 2019-10-31 | 주식회사 파나시아 | Flue Gas Cleaning Liquid Purification System |
| CN109107369A (en) * | 2018-09-04 | 2019-01-01 | 北京慧峰仁和科技股份有限公司 | SO in a kind of flue gas3Removing system and method |
| CN110756032A (en) * | 2019-10-22 | 2020-02-07 | 武汉天空蓝环保科技有限公司 | SO in flue gas3Desorption system and desorption method |
| CN212156660U (en) * | 2020-04-24 | 2020-12-15 | 大唐环境产业集团股份有限公司 | Solution conveying device |
| CN216498256U (en) * | 2021-11-03 | 2022-05-13 | 国能铜陵发电有限公司 | Desulfurization dust pelletizing system |
| CN219462991U (en) * | 2022-11-29 | 2023-08-04 | 重庆凯杰林环保工程有限公司 | Waste gas desulfurization device |
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