CN210645664U - Multi-stage purification device for boiler flue gas emission treatment - Google Patents
Multi-stage purification device for boiler flue gas emission treatment Download PDFInfo
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- CN210645664U CN210645664U CN201920598949.4U CN201920598949U CN210645664U CN 210645664 U CN210645664 U CN 210645664U CN 201920598949 U CN201920598949 U CN 201920598949U CN 210645664 U CN210645664 U CN 210645664U
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Abstract
The utility model relates to a flue gas purification technical field specifically is a multistage purifier who relates to a boiler flue gas emission handles usefulness comprises flue gas dust pelletizing system, flue gas adsorption system, desorption system, flue gas monitored control system. Compared with the traditional flue gas treatment method, the utility model discloses an activated carbon fiber carries out dry process and adsorbs, possesses strong, the desorption efficient of adsorption capacity, no secondary pollution, can regenerate, advantage that the working costs is low. And the utility model designs this kind of activated carbon fiber adsorption cylinder with brand-new structure, carry out integral type dust removal SOx/NOx control purification treatment to the boiler flue gas, make whole equipment structure comparatively simple, area diminishes, the maintenance cost reduces.
Description
Technical Field
The utility model relates to a flue gas purification technical field specifically relates to a multistage purifier of boiler fume emission processing usefulness.
Background
At present, coal-fired power generation is still the most main component in the electric power structure of China, and SO discharged by coal-fired is2And NOXAnd the like cause serious environmental pollution, so the country increases the treatment strength on the environmental pollution year by year. Currently, the most commonly used flue gas desulfurization and denitrification processes are a wet lime/limestone method and a Selective Catalytic Reduction (SCR) method, but the processes can only treat a single pollutant, and the overall treatment effect on complex pollutants is not ideal: the wet process is more complex, and the occupied area and the investment are larger; the investment and the operating cost of SCR are high, the requirement on smoke components is high, and the problems that the catalyst is easy to be poisoned and lose efficacy and the like exist. At present, multi-pollutant integration control techniques such as desulfurization, denitrogenation, dust removal receive attention gradually simultaneously, and it compares and has huge advantage in single pollutant control: the method has the advantages of small occupied area, relatively small investment, low maintenance cost, capability of simultaneously controlling various pollutants and the like, so that the simultaneous control technology of the multiple pollutants is a necessary choice for the control treatment of the flue gas pollution in the future. In recent years, with the emergence of a new generation of carbon catalytic adsorption material, namely Activated Carbon Fiber (ACF), the technology has wider application space. But the activated carbon fiber absorbs SO2And NOXThereafter, H having adsorption active sites on the fiber surface adsorbed2SO4And HNO3Occupation, resulting in a large loss of the adsorption effect of the activated carbon fibers.
SUMMERY OF THE UTILITY MODEL
The utility model provides a multistage purifier of boiler flue gas emission processing usefulness has designed the adsorption drum structure and has made the desorption more convenient, and is high-efficient, has realized that dust removal adsorbs the desorption integration, has reduced the maintenance cost, has improved production efficiency.
In order to achieve the above purpose, the utility model provides the following technical scheme:
a multi-stage purifier for treating the fume discharged from boiler is composed of fume dusting system, fume adsorption system, desorption system and fume monitor system.
The flue gas dust removal system is formed by connecting a cyclone dust collector, a bag-type dust collector and a fan in sequence through pipelines; and the dust outlets of the bag-type dust collector and the cyclone dust collector are connected with a dust recovery tank. The fan is under negative pressure before the inlet and under positive pressure after the outlet, and can be automatically controlled by a frequency converter, so that the aims of energy conservation and environmental protection are fulfilled.
The flue gas adsorption and desorption system comprises an adsorption tower, a first air supplement fan and a chimney; the adsorption tower is an up-flow adsorption tower with a double-cavity structure, a smoke inlet communicated with the inner cavity is formed in the side wall of the bottom end of the adsorption tower, a smoke outlet communicated with the inner cavity is formed in the top end of the adsorption tower, a waste discharge port communicated with the inner cavity and the outer cavity is formed in the bottom end of the adsorption tower, and an adsorption roller is arranged in the inner cavity; the waste discharge port is connected with the waste residue recovery tank.
The center pin when adsorption cylinder installs is 15 with the contained angle of horizontal plane, and certain angle is favorable to when adsorption cylinder utilizes the desorption of hot steam, separates out the inner chamber that the residue was more easily introduced into the adsorption tower from activated carbon fiber felt surface, reduces the top adsorption cylinder and drops the residue and cause secondary pollution to the adsorption cylinder below. The adsorption roller comprises a roller bracket and a scraper; the roller bracket is connected with the motor through a rotating shaft, and the outer wall of the roller bracket is wrapped with a layer of activated carbon fiber felt.
The scraper is positioned on the outer surface of the activated carbon fiber felt and is matched with the outer surface, and consists of a cutter head with a trapezoidal section at the upper part and a drainage groove with a W-shaped section at the lower part, and the material is stainless steel.
And the first air supplementing machine is connected to a pipeline between a smoke outlet of the adsorption tower and the chimney.
The desorption system comprises a hot second air supplement fan, a hot steam inlet, a condenser, a vacuum pump and a condensate recovery tank; each hot steam inlet is arranged below the corresponding adsorption drum; the hot steam enters the adsorption tower through a hot steam inlet communicated with the inner cavity under the traction of the second air supply machine, is purified by the adsorption roller and is condensed and liquefied by the condenser under the traction of the vacuum pump to enter the condensate recovery tank. The vacuum pump is arranged, so that steam conveyed in the previous process can smoothly enter the condensate recovery tank, pressure can be provided for condensate discharged from the condenser, and the condensate can be smoothly conveyed to the condensate recovery tank. And then make whole desorption device desorption effect promote, improved productivity ratio.
The flue gas monitoring system comprises a gas sensor, a dust sensor, a temperature sensor, an air speed sensor, a touch control integrated machine, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a fourth electromagnetic valve; the gas sensor and the dust sensor are arranged on a chimney, the temperature sensor is arranged on a pipeline connected with a hot steam inlet, and the wind speed sensor is respectively arranged on a connecting pipeline of the fan and the first air supplement fan; the first electromagnetic valve is arranged on a pipeline between the fan and the smoke inlet, the second electromagnetic valve is arranged on a pipeline between the smoke outlet and the condenser, the third electromagnetic valve is arranged on a pipeline between the first air supply fan and the chimney, and the fourth electromagnetic valve is arranged on a pipeline connected with each hot steam inlet; the sensor and the electromagnetic valve are electrically connected with the touch control integrated machine
Further, the rotation speed of the adsorption drum is 2 weeks/min. The peripheral air current of adsorption cylinder is not disturbed when the waste liquid waste residue can be clear away to low rotational speed, reduces adsorption efficiency.
Further, the temperature of hot steam used for desorption of the flue gas purification device is 120-150 ℃, and the time is 30 min. The surface adsorbed substances of the activated carbon fiber can not be removed at a low temperature, and the microstructure of the activated carbon fiber can be destroyed at a high temperature.
Further, the gas sensor includes an SO2Sensor, NOXSensor, CO sensor, and CO2A sensor. The monitoring of the tail gas can know whether the exhaust gas reaches the national emission standard. If the pollutants in the tail gas are found to slightly exceed the emission standard, the flow direction of the tail gas can be changed by utilizing the first electromagnetic valve and the third electromagnetic valve, and the tail gas is treated byThe tail gas is conveyed back to the adsorption tower again for secondary adsorption; if the pollutants in the tail gas greatly exceed the emission standard, indicating that the activated carbon fiber felt is adsorbed to reach saturation, the smoke adsorption system is closed by using the touch control integrated machine, the fourth electromagnetic valve is opened, the desorption system is opened, and the activated carbon fiber felt is subjected to thermal steam desorption regeneration.
Compare with current gas cleaning device, the beneficial effects of the utility model are that:
compare in traditional SOx/NOx control technique, the utility model discloses a dry process technique have not consume water, no secondary pollution, recoverable resource waste utilization, the relatively simple characteristics of system. In dry adsorption, the activated carbon fiber has the advantages of strong adsorption capacity, high removal efficiency, no secondary pollution, reproducibility and low operation cost.
Present activated carbon fiber adsorption equipment needs extra desorption associated device, and the cost is noble, and area is big, and the utility model discloses an adsorption cylinder structure make the desorption more convenient, and the maintenance cost reduces, has accomplished the absorption desorption integration.
Drawings
FIG. 1 is a schematic structural view of a flue gas purification device of the present invention;
FIG. 2 is a schematic structural view of the adsorption drum of the present invention;
fig. 3 is a schematic cross-sectional view of the scraper of the present invention.
In the figure: 1. a flue gas dust removal system, 11, a cyclone dust collector, 12, a bag-type dust collector, 13, a dust recovery tank, 14, a fan, 2, a flue gas adsorption system, 21, an adsorption tower, 211, an outer cavity, 212, an inner cavity, 213, a smoke inlet, 214, a smoke outlet, 215, an adsorption roller, 2151, a roller support, 2152, an activated carbon fiber felt, 2153, a scraper, 21531, a cutter head, 21532, a drainage groove, 2154, a motor, 216, a waste discharge port, 217, a waste residue recovery tank, 22, a first air supplement fan, 23, a chimney, 3, a desorption system, 31, a second air supplement fan, 32, a hot steam inlet, 33, a condenser, 34, a vacuum pump, 35, a condensate recovery tank, 4, a flue gas monitoring system, 41, a gas sensor, 42, a dust sensor, 43, a temperature sensor, 44, a wind speed sensor, 45, a touch control integrated machine, 461, a first electromagnetic valve, 462, a second electromagnetic valve, 463, a second electromagnetic, A third solenoid valve, 464 and a fourth solenoid valve.
Detailed Description
To further illustrate the manner in which the present invention is made and the effects obtained, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings.
As shown in fig. 1, a multi-stage purification device for treating boiler flue gas emission is composed of a flue gas dust removal system 1, a flue gas adsorption system 2, a desorption system 3 and a flue gas monitoring system 4.
The flue gas dust removal system 1 is formed by connecting a cyclone dust collector 11, a bag-type dust collector 12 and a fan 14 in sequence through pipelines; the dust outlets of the bag-type dust collector 12 and the cyclone dust collector 11 are connected with a dust recovery tank 13. The blower 14 is under negative pressure before the inlet and under positive pressure after the outlet, and can be automatically controlled by a frequency converter, so as to achieve the purposes of energy conservation and environmental protection.
The flue gas adsorption and desorption system 2 comprises an adsorption tower 21, a first air supplement fan 22 and a chimney 23; the adsorption tower 21 is an up-flow adsorption tower with a double-cavity structure, a smoke inlet 213 communicated with the inner cavity 212 is arranged on the side wall of the bottom end, a smoke outlet 214 communicated with the inner cavity 212 is arranged at the top end, a waste discharge port 216 communicated with the inner cavity 212 and the outer cavity 211 simultaneously is arranged at the bottom end, and an adsorption drum 215 is arranged in the inner cavity 212; the waste discharge port 216 is connected with a waste residue recovery tank 217.
As shown in fig. 1 and 2, when the adsorption drum 215 is installed, the included angle between the central axis and the horizontal plane is 15 °, and a certain angle is favorable for guiding the residue precipitated from the surface of the activated carbon fiber felt into the inner cavity of the adsorption tower more easily when the adsorption drum is desorbed by using hot steam, so that the secondary pollution of the residue falling from the adsorption drum 215 above to the adsorption drum 215 below is reduced. The adsorption roller 215 includes a roller support 2151 and a scraper 2153; the roller bracket 2151 is connected with the motor 2154 through a rotating shaft, and a layer of activated carbon fiber felt 2152 is wrapped on the outer wall of the roller bracket 2151.
As shown in fig. 3, the scraper 2153 is located on the outer surface of the activated carbon fiber felt 2152, is fitted with the outer surface, and is composed of a cutter head 21531 with a trapezoidal section at the upper part and a drainage groove 21532 with a W-shaped section at the lower part, and is made of stainless steel.
As shown in fig. 1, the first air supply blower 22 is connected to a duct between the smoke outlet 214 of the adsorption tower 21 and the stack 23.
The desorption system 3 comprises a hot second air supplementing machine 31, a hot steam inlet 32, a condenser 33, a vacuum pump 34 and a condensate recovery tank 35; each of the hot steam inlets 32 is disposed below the corresponding adsorption drum 215; the hot steam enters the adsorption tower 21 through the hot steam inlet 32 communicated with the inner cavity 212 under the traction of the second air supply fan 31, is purified by the adsorption roller 215, and is condensed and liquefied by the condenser 33 under the traction of the vacuum pump 34 to enter the condensate recovery tank 35. The vacuum pump 34 is arranged to smoothly feed the vapor delivered from the previous process into the condensate recovery tank 35 and to provide pressure to the condensate discharged from the condenser 33, thereby ensuring smooth delivery of the condensate to the condensate recovery tank 35. And then make whole desorption device desorption effect promote, improved productivity ratio.
The flue gas monitoring system 4 comprises a gas sensor 41, a dust sensor 42, a temperature sensor 43, a wind speed sensor 44, a touch control integrated machine 45, a first electromagnetic valve 461, a second electromagnetic valve 462, a third electromagnetic valve 463 and a fourth electromagnetic valve 464; the gas sensor 41 and the dust sensor 42 are arranged on the chimney 23, the temperature sensor 43 is arranged on a pipeline connected with the hot steam inlet 31, and the wind speed sensor 44 is respectively arranged on a connecting pipeline of the fan 14 and the first air supplement fan 22; the first solenoid valve 461 is disposed on the pipe between the fan 14 and the smoke inlet 213, the second solenoid valve 462 is disposed on the pipe between the smoke outlet 214 and the condenser 33, the third solenoid valve 463 is disposed on the pipe between the first complement fan 22 and the chimney 23, and the fourth solenoid valve 464 is disposed on the pipe connecting each hot steam inlet 32; the sensor and the electromagnetic valve are electrically connected with the touch control integrated machine 45
The rotation speed of the adsorption drum 215 is 2 r/min. The peripheral air current of adsorption cylinder is not disturbed when the waste liquid waste residue can be clear away to low rotational speed, reduces adsorption efficiency.
The temperature of hot steam used for desorption of the flue gas purification device is 150 ℃, and the time is 30 min. The surface adsorbed substances of the activated carbon fiber can not be removed at a low temperature, and the microstructure of the activated carbon fiber can be destroyed at a high temperature.
The gas sensor 41 includes an SO2Sensor, NOXSensor, CO sensor, and CO2A sensor. The monitoring of the tail gas can know whether the exhaust gas reaches the national emission standard. If the pollutants in the tail gas are found to slightly exceed the emission standard, the flow direction of the tail gas can be changed by using the first electromagnetic valve 461 and the third electromagnetic valve 463, and the tail gas is conveyed back to the adsorption tower 21 again for secondary adsorption; if the pollutants in the tail gas greatly exceed the emission standard, which indicates that the activated carbon fiber felt 2152 is adsorbed to reach saturation, the flue gas adsorption system 2 needs to be closed by the touch control integrated machine 45, the fourth electromagnetic valve 464 is opened, the desorption system 3 is opened, and the activated carbon fiber felt 2152 is subjected to thermal steam desorption regeneration.
Application example:
under the traction of the fan 14, the boiler flue gas firstly enters the cyclone dust collector 11, and the capture efficiency of the cyclone dust collector is only 50% -80% in the actual operation, so that the boiler flue gas is used as primary dust collection; after primary dust removal, the flue gas enters the bag-type dust remover 12, and the efficiency of the bag-type dust remover 12 can reach more than 99 percent when the bag-type dust remover 12 captures particles with the particle size of less than 20 microns, so the flue gas is used as secondary dust removal. The captured dust is recycled into the dust recycling tank.
The flue gas enters the upflow adsorption tower 21 from the flue gas inlet 213 after being dedusted, and desulfurization and denitrification are carried out on the activated carbon fiber felt 2152 of the adsorption drum 215:
the desulfurization mechanism of the activated carbon fiber is as follows: sigmaγThe number of the empty active bits is represented,*indicating the adsorption state.
The adsorption principle is as follows: SO (SO)2+σγ→SO3 *
H2O+σγ→H2O*
O2+σγ→2O*
The oxidation mechanism is as follows: 2SO2 *+O*→2SO3 *
SO2(g)+O*→SO3 *
SO3 *+H2O→H2SO4 *+σγ
The desulfurization mechanism of the activated carbon fiber is as follows:
the monitoring of the tail gas can know whether the exhaust gas reaches the national emission standard.
The flue gas after desulfurization and denitrification enters a chimney 23 under the action of a first air supply machine 22, and whether the flue gas reaches the national emission standard is detected by a flue gas monitoring system. If the pollutants in the flue gas slightly exceed the emission standard, the flow direction of the flue gas can be changed by using the first electromagnetic valve 461 and the third electromagnetic valve 463, and the flue gas is conveyed back to the adsorption tower 21 again for secondary adsorption; if the pollutants in the flue gas greatly exceed the emission standard, which indicates that the adsorption of the activated carbon fiber felt 2152 has reached saturation, the flue gas adsorption system 2 needs to be closed by the touch control integrated machine 45, the fourth electromagnetic valve 464 is opened, the desorption system 3 is opened, and the activated carbon fiber felt 2152 is subjected to thermal steam desorption regeneration.
The desorption mechanism is as follows: h2SO4 *+H2O→H2SO4(l)+σγ
The desorbed acid vapor is drawn by the vacuum pump 34, changes the flow direction through the second electromagnetic valve 462, and enters the condensate recovery tank 35 after being condensed in the condenser 33.
And after the desorption is finished, the desorption system 3 can be closed, the flue gas adsorption system 2 is restarted, and a new round of flue gas purification is carried out.
The above is a complete integrated dedusting, desulfurization, denitrification and purification process for the boiler flue gas.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (4)
1. A multi-stage purification device for boiler flue gas emission treatment is characterized by comprising a flue gas dust removal system (1), an adsorption system (2), a desorption system (3) and a flue gas monitoring system (4);
the flue gas dust removal system (1) is formed by connecting a cyclone dust collector (11), a bag-type dust collector (12) and a fan (14) in sequence through pipelines; the dust outlets of the bag-type dust collector (12) and the cyclone dust collector (11) are connected with a dust recovery tank (13);
the adsorption system (2) comprises an adsorption tower (21), a first air supplement machine (22) and a chimney (23); the adsorption tower (21) is an up-flow adsorption tower with a double-cavity structure, a smoke inlet (213) communicated with the inner cavity (212) is formed in the side wall of the bottom end of the adsorption tower, a smoke outlet (214) communicated with the inner cavity (212) is formed in the top end of the adsorption tower, a waste discharge port (216) communicated with the inner cavity (212) and the outer cavity (211) simultaneously is formed in the bottom end of the adsorption tower, and an adsorption roller (215) is arranged in the inner cavity (212); the waste discharge port (216) is connected with a waste residue recovery tank (217); the included angle between the central axis of the adsorption roller (215) and the horizontal plane is 15 degrees when the adsorption roller (215) is installed, and the adsorption roller (215) comprises a roller bracket (2151) and a scraper (2153); the roller bracket (2151) is connected with the motor (2154) through a rotating shaft, and a layer of activated carbon fiber felt (2152) is wrapped on the outer wall of the roller bracket (2151); the scraper (2153) is positioned on the outer surface of the activated carbon fiber felt (2152) and is matched with the outer surface, and the scraper (2153) consists of a cutter head (21531) with a trapezoidal section at the upper part and a drainage groove (21532) with a W-shaped section at the lower part; the first air supplement fan (22) is connected to a pipeline between a smoke outlet (214) of the adsorption tower (21) and a chimney (23);
the desorption system (3) comprises a second air supply fan (31), a hot steam inlet (32), a condenser (33), a vacuum pump (34) and a condensate recovery tank (35); each hot steam inlet (32) is arranged below the corresponding adsorption drum (215); hot steam enters the adsorption tower (21) through a hot steam inlet (32) communicated with the inner cavity (212) under the traction of the second air supply fan (31), is purified by an adsorption roller (215), and is condensed and liquefied by a condenser (33) under the traction of a vacuum pump (34) to enter a condensate recovery tank (35);
the flue gas monitoring system (4) comprises a gas sensor (41), a dust sensor (42), a temperature sensor (43), a wind speed sensor (44), a touch control integrated machine (45), a first electromagnetic valve (461), a second electromagnetic valve (462), a third electromagnetic valve (463) and a fourth electromagnetic valve (464); the gas sensor (41) and the dust sensor (42) are arranged on a chimney (23), the temperature sensor (43) is arranged on a pipeline connected with the hot steam inlet (32), and the wind speed sensor (44) is respectively arranged on a connecting pipeline of the fan (14) and the first air supplement fan (22); the first solenoid valve (461) is arranged on a pipeline between the fan (14) and the smoke inlet (213), the second solenoid valve (462) is arranged on a pipeline between the smoke outlet (214) and the condenser (33), the third solenoid valve (463) is arranged on a pipeline between the first air supply fan (22) and the chimney (23), and the fourth solenoid valve (464) is arranged on a pipeline connected with each hot steam inlet (32); the sensor and the electromagnetic valve are electrically connected with the touch control integrated machine (45).
2. The multi-stage purification apparatus for boiler flue gas emission treatment according to claim 1, wherein the rotation speed of the adsorption drum (215) is 2 r/min.
3. The multi-stage purification apparatus for boiler flue gas emission treatment according to claim 1, wherein the temperature of the hot steam used for desorption is 120-150 ℃ for 30 min.
4. The multi-stage purification apparatus for boiler flue gas emission treatment according to claim 1, wherein the gas sensor (41) comprises SO2Sensor, NOXSensor, CO sensor, and CO2A sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920598949.4U CN210645664U (en) | 2019-04-28 | 2019-04-28 | Multi-stage purification device for boiler flue gas emission treatment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920598949.4U CN210645664U (en) | 2019-04-28 | 2019-04-28 | Multi-stage purification device for boiler flue gas emission treatment |
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| Publication Number | Publication Date |
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| CN210645664U true CN210645664U (en) | 2020-06-02 |
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| CN201920598949.4U Expired - Fee Related CN210645664U (en) | 2019-04-28 | 2019-04-28 | Multi-stage purification device for boiler flue gas emission treatment |
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Address after: 214200 no.8-1, Czech Road, Yixing Economic Development Zone, Yixing City, Wuxi City, Jiangsu Province Patentee after: WUXI DOUBLE-WIN ENVIRONMENT SCIENCE TECHNOLOGY Co.,Ltd. Address before: Room 602, 88-2 Dongshan Road, Yicheng Street, Yixing City, Wuxi City, Jiangsu Province Patentee before: WUXI DOUBLE-WIN ENVIRONMENT SCIENCE TECHNOLOGY Co.,Ltd. |
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