CN210048799U - Novel dry dedusting gas purification and recovery device - Google Patents
Novel dry dedusting gas purification and recovery device Download PDFInfo
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- CN210048799U CN210048799U CN201920561179.6U CN201920561179U CN210048799U CN 210048799 U CN210048799 U CN 210048799U CN 201920561179 U CN201920561179 U CN 201920561179U CN 210048799 U CN210048799 U CN 210048799U
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Abstract
The utility model relates to a converter gas purifies recovery unit, a novel dry process dust removal gas purifies recovery unit, including drum electrostatic precipitator, export pipeline, power station fan, gas cooler and clean gas pipeline, wherein drum electrostatic precipitator includes flue gas entry and exhanst gas outlet, the inlet end butt joint of exhanst gas outlet pipeline, the end of giving vent to anger of gas outlet pipeline and gas cooler's entry butt joint, the power station fan sets up in the gas outlet pipeline and provides the interior gas flow power of gas outlet pipeline, gas cooler's export and clean gas pipeline's inlet end butt joint, gas cooler is used for cooling and dust removal purification to gas before gas treatment. The device can realize dust removal treatment and cooling treatment of flue gas generated by a converter of a steel company, and can selectively carry out emission to the external environment or recovery storage treatment, even if the gas is finally emitted to the external environment, the emitted gas meets the environmental protection requirement.
Description
Technical Field
The utility model relates to a gas purification recovery device, in particular to a gas recovery device with dry dedusting.
Background
The steel company uses coal in the production process, waste flue gas can be generated in the production process, the flue gas contains a large amount of coal gas, dust and other gases, the direct emission of the flue gas does not accord with the environmental protection standard, and meanwhile, the direct emission of the coal gas causes environmental pollution and the direct emission of the coal gas also causes energy waste.
Disclosure of Invention
In order to solve the problem, the utility model provides a novel dry process dust removal coal gas purifies recovery unit, the device can filter the dust in the flue gas, can also realize the purification of coal gas simultaneously and retrieve.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a novel dry process dust removal coal gas purifies recovery unit, includes drum electrostatic precipitator, gas outlet pipeline, power station fan, gas cooler and clean gas pipeline, wherein drum electrostatic precipitator includes flue gas entry and exhanst gas outlet, the exhanst gas outlet docks with the inlet end of gas outlet pipeline, the end of giving vent to anger of gas outlet pipeline docks with the entry of gas cooler, the power station fan sets up in the gas outlet pipeline and provides the interior gas flow power of gas outlet pipeline, the export of gas cooler docks with the inlet end of clean gas pipeline, the gas cooler is used for cooling and dust removal purification to coal gas before coal gas is handled.
Preferably, the gas outlet end of the clean gas pipeline is provided with a three-way pipe and a switching valve, the two remaining branch ports of the three-way pipe are respectively connected with a gas recovery pipeline and a gas discharge pipeline, the tail end of the gas recovery pipeline is provided with a gas recovery device, and the tail end of the gas discharge pipeline is provided with a diffusion chimney.
Preferably, the gas outlet pipeline is arranged close to the smoke outlet of the cylindrical electrostatic dust collector in a right-angle bending mode, and the power station fan is arranged at the right-angle bending position of the gas outlet pipeline.
Preferably, a gas analyzer for detecting the gas density of the gas in the gas outlet pipeline is arranged at the position, close to the gas cooler, of the gas outlet pipeline.
Preferably, the diameter of the part of the air outlet pipeline between the gas analyzer and the power station fan is thickened, and a dust discharge port is formed in the thickened section of the air outlet pipeline.
Preferably, the flue gas inlet of the cylindrical electrostatic precipitator is in butt joint with an evaporative cooler, the evaporative cooler is used for filtering coarse ash in the flue gas, and the cylindrical electrostatic precipitator is used for filtering fine ash in the flue gas.
Preferably, the flue gas inlet of the evaporative cooler is in butt joint with a vaporization cooling flue, and the vaporization cooling flue is used for cooling the flue gas to 950 ℃.
Preferably, the power station fan is a variable frequency motor.
Preferably, the gas recovery device is a gas tank.
Preferably, the cylindrical electrostatic precipitator is a cylindrical four-electric-field or five-electric-field electrostatic precipitator.
Use the utility model discloses a beneficial effect is:
the device can realize the dust removal treatment and cooling treatment of the flue gas generated by the converter of the steel company, monitor the content of the coal gas in the flue gas on line, switch the gas treatment mode when the content of the coal gas reaches the standard, and selectively discharge the flue gas to the external environment or recycle and store the flue gas so as to meet the requirement of environmental protection.
The gas cooler is arranged in front of the clean gas pipeline, and the gas is stored, filtered and finally cooled before the gas is processed by the clean gas pipeline, so that even if the gas is finally discharged to the external environment, the discharged gas meets the environmental protection requirement so as to meet increasingly strict gas discharge conditions.
Drawings
Fig. 1 is a schematic structural diagram of the novel dry dedusting gas purification and recovery device of the utility model.
FIG. 2 is a process flow chart of the novel dry dedusting gas purification and recovery device of the utility model.
Fig. 3 is a schematic structural view of an evaporative cooler in the dry dedusting gas purification and recovery device of the utility model.
Fig. 4 is a performance curve diagram of the power station fan in the dry dedusting gas purification and recovery device of the utility model.
The reference numerals include:
100-cylinder electrostatic precipitator, 200-gas outlet pipeline, 210-power station fan, 220-dust discharge port, 230-gas analyzer, 300-gas cooler, 310-maintenance platform, 400-clean gas pipeline, 410-tee pipe and switching valve, 420-gas recovery pipeline, 430-gas discharge pipeline and 500-blow-off chimney.
Detailed Description
In order to make the purpose, technical solution and advantages of the present technical solution more clear, the present technical solution is further described in detail below with reference to specific embodiments. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present teachings.
As shown in fig. 1-4, the novel dry dedusting gas purification and recovery device provided in this embodiment includes a cylindrical electrostatic precipitator 100, a gas outlet pipeline 200, a power station fan 210, a gas cooler 300, and a clean gas pipeline 400, where the cylindrical electrostatic precipitator 100 includes a flue gas inlet and a flue gas outlet, the flue gas outlet is in butt joint with an air inlet end of the gas outlet pipeline 200, an air outlet end of the gas outlet pipeline 200 is in butt joint with an inlet of the gas cooler 300, the power station fan 210 is disposed in the gas outlet pipeline 200 and provides gas flow power in the gas outlet pipeline 200, an outlet of the gas cooler 300 is in butt joint with an air inlet end of the clean gas pipeline 400, and the gas cooler 300 is used for cooling and dedusting gas before gas treatment. A service platform 310 may be provided at the gas cooler 300.
The device can realize the dust removal treatment and cooling treatment of the flue gas generated by the converter of the steel company, monitor the content of the coal gas in the flue gas on line, switch the gas treatment mode when the content of the coal gas reaches the standard, and selectively discharge the flue gas to the external environment or recycle and store the flue gas so as to meet the requirement of environmental protection. The gas cooler 300 is arranged in front of the clean gas pipeline 400, gas is stored, filtered and finally cooled before the clean gas pipeline 400 processes the gas, the gas is timely and finally discharged to the external environment, and the discharged gas meets the environmental protection requirement so as to meet increasingly strict gas discharge conditions.
The gas outlet end of the clean gas pipeline 400 is provided with a three-way pipe and a switching valve 410, the remaining two branch ports of the three-way pipe are respectively connected with a gas recovery pipeline 420 and a gas discharge pipeline 430, wherein the tail end of the gas recovery pipeline 420 is provided with a gas recovery device, and the tail end of the gas discharge pipeline 430 is provided with a diffusion chimney 500.
The gas outlet pipeline 200 is arranged close to the flue gas outlet of the cylindrical electrostatic dust collector 100 in a right-angle bending mode, and the power station fan 210 is arranged at the right-angle bending position of the gas outlet pipeline 200.
A gas analyzer 230 for detecting the gas density of the gas in the gas outlet pipeline 200 is arranged at the position of the gas outlet pipeline 200 close to the gas cooler 300.
The diameter of the part of the gas outlet pipeline 200 between the gas analyzer 230 and the power station fan 210 is thickened, and the thickened section of the gas outlet pipeline 200 is provided with a dust discharge port 220.
The flue gas inlet of the cylindrical electrostatic precipitator 100 is in butt joint with an evaporative cooler, the evaporative cooler is used for filtering coarse ash in the flue gas, and the cylindrical electrostatic precipitator 100 is used for filtering fine ash in the flue gas.
The flue gas inlet of the evaporative cooler is in butt joint with the evaporative cooling flue, and the evaporative cooling flue is used for cooling the flue gas to 950 ℃.
The power station fan 210 is a variable frequency motor. The gas recovery device is a gas tank. The cylindrical electrostatic precipitator 100 is a cylindrical four-field or five-field electrostatic precipitator.
Generally speaking, the device firstly cools the flue gas through the vaporization cooling flue, the flue gas enters the evaporation cooler after being cooled to 950 ℃, the evaporation cooler filters coarse ash in the flue gas through water mist, the flue gas further enters the cylinder electrostatic dust collector 100, and the cylinder electrostatic dust collector 100 filters fine ash in the flue gas through four electric fields or five electric fields. At the moment, the flue gas basically does not contain solid particles, the flue gas is finally subjected to final coal gas cooling and coal gas purification through a coal gas cooler 300, the temperature of the coal gas is reduced to be below 70 ℃ after the coal gas is washed and cooled, the coal gas content in the gas is analyzed through a coal gas analyzer 230, and when the coal gas content exceeds a threshold value, a three-way pipe and a switching valve 410 switch a clean coal gas pipeline 400 to be communicated with a coal gas recovery pipeline 420; when the gas content is lower than the threshold value, the clean gas pipeline 400 is switched to be communicated with the gas discharge pipeline 430, and the gas discharge pipeline 430 discharges gas to the external environment through the diffusion chimney 500.
Specifically, as shown in fig. 3, in the evaporative cooler, eight symmetrical spray gun holes are formed at the tail end of the evaporative cooling flue, eight double-medium spray guns are additionally arranged, the spray guns adopt stainless steel double-medium spray guns manufactured by american spray companies, the spray direction and the flue gas flow direction are in the same direction, so that the blockage of the spray nozzles can be prevented, and the airflow resistance can be reduced; the sprayed water amount is automatically adjusted according to the size of the system smoke amount and the inlet and outlet temperature of the evaporative cooler. The sprayed mist water is totally evaporated in the evaporative cooler.
The best cooling effect is achieved after the water and steam (nitrogen) mixed gas is subjected to sufficient heat exchange in the process that the high-temperature flue gas passes through the evaporation cooler main body, and the condition of dripping water cannot be generated. Meanwhile, large-particle dust can fall into an ash bin at the lower part of the evaporative cooler under the action of gravity and water mist, and is collected through the ash bin and then recycled. The CO2 flue gas, which contains mostly small particle dust, enters the next process stage through the flue. Wherein about 40% of the dust in the evaporative cooler settles under the action of the water mist. The temperature of the flue gas is reduced from 950 ℃ to 200-300 ℃.
The lower frame of the cylindrical electrostatic precipitator 100 is composed of five ring beams, and a single field chamber is formed between two adjacent ring beams by a steel plate reel. In the cylindrical electrostatic precipitator 100, the flue gas cooled by the evaporative cooler enters the electrostatic precipitator body through the flue. High-voltage direct current is conducted on the positive pole and the negative pole of the electric dust collector, and an electrostatic field which is enough to ionize gas is maintained between the two poles. The smoke containing the smoke dust enters a high-voltage electric field of the dust remover, the dust particles are charged in the ionization process of the high-voltage electric field, the charged dust particles move to electrodes with opposite polarities under the action of the electric field force and are deposited on the electrodes, the dust particles are separated from the dust-containing gas, then the dust falls to the lower part of the dust remover by a method of vibrating the electrodes, the dust is scraped into a dust conveying groove by front and rear dust scrapers, and then the dust is conveyed into a dust bin by a chain type dust conveyor. And (4) discharging ash through an ash discharge valve according to the ash amount in the bin reflected by the level indicator.
The tee and the switching valve 410 form a switching station which is mainly composed of two cup valves which are hydraulically regulated and separated from each other. With this station, the operation can be switched without any pressure shocks to the system. In the steelmaking process, the emission or recovery of the flue gas is triggered and switched by the concentration condition of CO, and the control is realized by opening two bell-shaped valves which are respectively communicated with a gas tank and a chimney of the switching station. Before the process of diffusing and recovering, the pressure at the downstream of the fan is suppressed through a chimney bell valve, the recovering operation cannot be carried out until the pressure is higher than a certain pressure of a gas chamber, when the recovering is switched to the diffusing, a small positive pressure must be kept to prevent gas from flowing back from the gas chamber, therefore, aiming at the two different switching modes, a switching process must be controlled by a differential pressure control loop with two different set values in a program, the opening degree of the chimney bell valve is controlled by an output signal of a controller, the differential pressure at the front and the rear of the gas chamber bell valve reaches the corresponding set value, and the gas can be switched without pressure disturbance in the normal switching or emergency quick switching process.
The foregoing is only a preferred embodiment of the present invention, and many variations can be made in the specific embodiments and applications of the present invention by those skilled in the art without departing from the spirit of the present invention.
Claims (10)
1. The utility model provides a novel dry process dust removal coal gas purifies recovery device which characterized in that: the gas cooling device comprises a cylindrical electrostatic dust collector, a gas outlet pipeline, a power station fan, a gas cooler and a clean gas pipeline, wherein the cylindrical electrostatic dust collector comprises a gas inlet and a gas outlet, the gas outlet is in butt joint with the gas inlet end of the gas outlet pipeline, the gas outlet end of the gas outlet pipeline is in butt joint with the inlet of the gas cooler, the power station fan is arranged in the gas outlet pipeline and provides gas flowing power in the gas outlet pipeline, the outlet of the gas cooler is in butt joint with the gas inlet end of the clean gas pipeline, and the gas cooler is used for cooling, dedusting and purifying gas before gas treatment.
2. The novel dry dedusting gas purification and recovery device according to claim 1, is characterized in that: the gas outlet end of the purified gas pipeline is provided with a three-way pipe and a switching valve, the rest two branch ports of the three-way pipe are respectively connected with a gas recovery pipeline and a gas discharge pipeline, the tail end of the gas recovery pipeline is provided with a gas recovery device, and the tail end of the gas discharge pipeline is provided with a diffusion chimney.
3. The novel dry dedusting gas purification and recovery device according to claim 1, is characterized in that: the gas outlet pipeline is arranged close to the smoke outlet of the cylindrical electrostatic dust collector in a right-angle bending mode, and the power station fan is arranged at the right-angle bending position of the gas outlet pipeline.
4. The novel dry dedusting gas purification and recovery device according to claim 1, is characterized in that: and a gas analyzer for detecting the gas content of the gas in the gas outlet pipeline is arranged at the position, close to the gas cooler, of the gas outlet pipeline.
5. The novel dry dedusting gas purification and recovery device according to claim 4, is characterized in that: the diameter of the part of the gas outlet pipeline between the gas analyzer and the power station fan is thickened, and a dust discharge port is formed in the thickened section of the gas outlet pipeline.
6. The novel dry dedusting gas purification and recovery device according to claim 1, is characterized in that: the smoke inlet of the cylindrical electrostatic dust collector is in butt joint with an evaporative cooler, the evaporative cooler is used for filtering coarse ash in smoke, and the cylindrical electrostatic dust collector is used for filtering fine ash in smoke.
7. The novel dry dedusting gas purification and recovery device according to claim 6, is characterized in that: the flue gas inlet of the evaporative cooler is in butt joint with the evaporative cooling flue, and the evaporative cooling flue is used for cooling the flue gas to 950 ℃.
8. The novel dry dedusting gas purification and recovery device according to claim 1, is characterized in that: the power station fan is a variable frequency motor.
9. The novel dry dedusting gas purification and recovery device according to claim 2, is characterized in that: the coal gas recovery device is a coal gas cabinet.
10. The novel dry dedusting gas purification and recovery device according to claim 1, is characterized in that: the cylindrical electrostatic dust collector is a cylindrical four-electric-field or five-electric-field electrostatic dust collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920561179.6U CN210048799U (en) | 2019-04-24 | 2019-04-24 | Novel dry dedusting gas purification and recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920561179.6U CN210048799U (en) | 2019-04-24 | 2019-04-24 | Novel dry dedusting gas purification and recovery device |
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| Publication Number | Publication Date |
|---|---|
| CN210048799U true CN210048799U (en) | 2020-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920561179.6U Active CN210048799U (en) | 2019-04-24 | 2019-04-24 | Novel dry dedusting gas purification and recovery device |
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| CN (1) | CN210048799U (en) |
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- 2019-04-24 CN CN201920561179.6U patent/CN210048799U/en active Active
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