CN215276476U

CN215276476U - Desulfurization and denitrification dust removal system

Info

Publication number: CN215276476U
Application number: CN202120274113.6U
Authority: CN
Inventors: 姜保勤
Original assignee: Shandong Bochuan New Energy Equipment Co ltd
Current assignee: Shandong Bochuan New Energy Equipment Co ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-12-24
Anticipated expiration: 2031-01-29

Abstract

The utility model discloses a belong to atmosphere pollution control technical field, specifically be a SOx/NOx control dust pelletizing system, its technical scheme is: including desulphurization unit, dust collector, denitrification facility and discharging equipment, the desulphurization unit right side is equipped with dust collector, the dust collector right side is equipped with denitrification facility, the denitrification facility right side is equipped with discharging equipment, desulphurization unit includes the combustion chamber the beneficial effects of the utility model are that: the desulfurization is carried out under the condition of being arranged at the temperature of more than 400 ℃, the dust removal is carried out at the temperature of more than 280 ℃ by utilizing the high-temperature resistant ceramic dust remover, the denitration is carried out at the temperature of 400 ℃ plus one year, the ceramic dust remover is used, the ceramic dust remover does not need to be replaced in a short time, the service life is long, the use is convenient, the cost is low, and the denitration is carried out at the temperature of 400 ℃ plus one year, so that the SCR denitration catalyst can exert the optimal activity.

Description

Desulfurization and denitrification dust removal system

Technical Field

The utility model relates to an atmosphere pollution control technical field, concretely relates to SOx/NOx control dust pelletizing system.

Background

Through an efficient SDS dry deacidification spraying and uniform distribution device, the deacidification agent is thermally activated in the flue, the specific surface area is rapidly increased, the deacidification agent is fully contacted with the flue gas to generate physical and chemical reactions, and acidic substances such as SO2 in the flue gas are completely absorbed; the medium-low temperature SCR denitration technology is that NH3 and NOx are reduced into N2 and H2O in oxygen-rich flue gas on the surface of a manganese-based catalyst.

The existing method for treating the flue gas comprises the following steps: the method comprises the following steps of desulfurizing kiln flue gas at 280 ℃ by using an SDS dry desulfurization system, dedusting at 260 ℃ by using a PTFE bag-type dust remover, denitrifying at 180 ℃ and 200 ℃ by using an SCR low-temperature denitrification system, and finally discharging the treated flue gas into the atmosphere by using a fan; the disadvantages of this method are: the cloth bag is frequently damaged under the influence of temperature, and if the cloth bag is used at a reduced temperature, the low-temperature catalyst is lower than 180 ℃, and the denitration activity is lost; the price of the low-temperature catalyst is more than twice that of the medium-temperature catalyst; the replacement is carried out once every three years, the cost of the low-temperature catalyst is too high, even if the cloth bag is not damaged due to high temperature, the replacement period of the cloth bag is two years, so that the cloth bag needs to be replaced for two years, and the cost is increased.

Therefore, it is necessary to invent a desulfurization, denitrification and dust removal system.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a SOx/NOx control dust pelletizing system carries out the desulfurization through setting up under the condition more than 400 degrees centigrade to utilize high temperature resistant ceramic dust remover to remove dust more than 280 degrees centigrade, denitrate at 280 plus 400 degrees centigrade, solved the not enough of current flue gas treatment device.

In order to achieve the above object, the present invention provides the following technical solutions:

a desulfurization, denitrification and dust removal system comprises a desulfurization device, a dust removal device, a denitrification device and a discharge device, wherein the dust removal device is arranged on the right side of the desulfurization device, the denitrification device is arranged on the right side of the dust removal device, and the discharge device is arranged on the right side of the denitrification device;

the desulfurization device comprises a combustion chamber, the combustion chamber is fixedly connected with a spray deacidification tower through a guide pipe, a fan and an air preheater I are fixedly installed on the outer wall of the left end of the spray deacidification tower, an air outlet at the top of the spray deacidification tower is fixedly connected with an auxiliary tower, and a temperature sensor is fixedly installed on the inner wall of the spray deacidification tower;

the dust removal device comprises a first induced draft fan and a ceramic dust remover, wherein the output end of the first induced draft fan is fixedly connected with the input end of the ceramic dust remover through a guide pipe;

the denitration device comprises an SCR reactor, a flue gas distribution plate and a catalyst containing piece are fixedly installed on the inner wall of the SCR reactor, an SCR denitration catalyst is arranged in the catalyst containing piece, a draught fan II is arranged at the top of the SCR reactor, an air preheater II is fixedly installed on the outer wall of the left end of the SCR reactor, an ammonia tank and a vaporizer are fixedly installed on the outer wall of the SCR reactor, an air outlet of the ammonia tank is fixedly connected with an air inlet of the vaporizer through a guide pipe, and a temperature sensor is fixedly installed on the inner wall of the SCR reactor;

the discharging device comprises a third induced draft fan and a chimney, and the three output ends of the third induced draft fan are communicated with the inner cavity of the chimney through a guide pipe.

Preferably, the output end of the fan is fixedly connected with the input end of the first air preheater through a guide pipe, and the output end of the first air preheater is communicated with the inner cavity of the spray deacidification tower through a guide pipe.

Preferably, the two output ends of the induced draft fan are fixedly connected with the air inlet of the SCR reactor through a guide pipe, and the two output ends of the air preheater are fixedly connected with the air inlet of the SCR reactor through a guide pipe.

Preferably, the air outlet of the vaporizer is fixedly connected with the air inlet of the SCR reactor through a conduit.

Preferably, the gas outlet of the auxiliary tower is fixedly connected with the input end of the induced draft fan I through a guide pipe, and the output end of the ceramic dust remover is fixedly connected with the gas inlet of the SCR reactor through a guide pipe.

Preferably, the air outlet of the SCR reactor is fixedly connected with the input end of the induced draft fan III through a guide pipe.

Preferably, the reaction temperature of the spray deacidification tower is set to be more than 400 ℃, and the reaction temperature of the SCR reactor is set to be 280-400 ℃.

The utility model has the advantages that:

flue gas combusted in a combustion chamber enters a spray deacidification tower through a guide pipe, a temperature sensor detects the temperature in the spray deacidification tower in real time, the temperature in the spray deacidification tower is maintained to be higher than the centigrade degree through an air preheater I, the flue gas is desulfurized in the spray deacidification tower, the desulfurized flue gas enters an auxiliary tower, a first induced draft fan is used for pumping the flue gas in the auxiliary tower into a ceramic dust remover for dust removal, the flue gas dedusted by the ceramic dust remover enters an SCR reactor, a vaporizer is used for vaporizing ammonia gas in an ammonia gas tank and sending the ammonia gas into the SCR reactor, the air is pumped into the SCR reactor by a fan from two directions, and the ammonia gas, oxygen in the air and oxides of nitrogen react to generate water and nitrogen gas, so that the denitration process of the flue gas is completed; finally, pumping the gas of the SCR reactor into a chimney by a third fan for discharging; the temperature sensors monitor the temperature in the spray deacidification tower and the temperature in the SCR reactor in real time, so that the temperature can be adjusted according to the temperature conditions in the spray deacidification tower and the temperature conditions in the SCR reactor; the desulfurization and denitration effects of the flue gas in the spray deacidification tower and the SCR reactor are better;

the desulfurization is carried out under the condition of being arranged at the temperature of more than 400 ℃, the high-temperature resistant ceramic dust remover is used for removing dust at the temperature of more than 280 ℃, the denitration is carried out at the temperature of 400 ℃ plus one year, the ceramic dust remover is used, the ceramic dust remover does not need to be replaced in a short time, the service life is long, the use is convenient, the cost is low, the denitration is carried out at the temperature of 400 ℃ plus one year, so that the SCR denitration catalyst can exert the optimal activity, the price of the SCR denitration catalyst used by the 280 plus one year 400 is lower than that of a low-temperature catalyst, and the denitration cost is saved.

Drawings

Fig. 1 is a schematic structural diagram provided in embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of a desulfurization device provided in embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of a denitration device provided in embodiment 1 of the present invention;

fig. 4 is a side view of an SCR reactor provided in example 1 of the present invention.

In the figure: the device comprises a desulfurization device 100, a dust removal device 200, a denitration device 300, an exhaust device 400, a combustion chamber 101, an auxiliary tower 102, a spray deacidification tower 103, a first air preheater 104, a fan 105, a first induced draft fan 201, a ceramic dust remover 202, an SCR reactor 301, a second fan 302, a temperature sensor 304, a flue gas distribution plate 305, a catalyst accommodating piece 306, an SCR denitration catalyst 307, a second air preheater 308, an ammonia gas tank 309, a vaporizer 310, a third induced draft fan 401 and a chimney 402.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Referring to fig. 1-4 of the specification, the desulfurization, denitrification and dust removal system of the embodiment comprises a desulfurization device 100, a dust removal device 200, a denitrification device 300 and a discharge device 400;

further, the desulfurization device 100 comprises a combustion chamber 101, an auxiliary tower 102, a spray deacidification tower 103, a first air preheater 104 and a fan 105, specifically, the combustion chamber 101 is fixedly connected with the spray deacidification tower 103 through a conduit, the fan 105 and the first air preheater 104 are fixedly installed on the outer wall of the left end of the spray deacidification tower 103, the air outlet at the top of the spray deacidification tower 103 is fixedly connected with the auxiliary tower 102, and the inner wall of the spray deacidification tower 103 is fixedly installed with a temperature sensor 304.

Further, the dust removing device 200 comprises a first induced draft fan 201 and a ceramic dust remover 202, specifically, an output end of the first induced draft fan 201 is fixedly connected with an input end of the ceramic dust remover 202 through a conduit; the first induced draft fan 201 is used for pumping the gas in the secondary tower into the ceramic dust collector 202, and the type of the first induced draft fan 201 is set to be GDF 2.5-8; the ceramic dust collector 202 functions to remove dust from the gas in the sub-tower, and the ceramic dust collector 202 is configured as an XZTD type ceramic multi-cyclone.

Further, the denitration device 300 comprises an SCR reactor 301, a second fan 302, a temperature sensor 304, a flue gas distribution plate 305, a catalyst accommodating part 306, an SCR denitration catalyst 307, a second air preheater 308, an ammonia tank 309 and a vaporizer 310, specifically, the flue gas distribution plate 305 and the catalyst accommodating part 306 are fixedly installed on the inner wall of the SCR reactor 301, the SCR denitration catalyst 307 is arranged in the catalyst accommodating part 306, the second fan 302 is arranged on the top of the SCR reactor 301, the second air preheater 308 is fixedly installed on the outer wall of the left end of the SCR reactor 301, the ammonia tank 309 and the vaporizer 310 are fixedly installed on the outer wall of the SCR reactor 301, the air outlet of the ammonia tank 309 is fixedly connected with the air inlet of the vaporizer 310 through a guide pipe, and the temperature sensor 304 is fixedly installed on the inner wall of the SCR reactor 301; the second fan 302 is set to be GDF1.4-4, and the second fan 302 is used for pumping outside air into the SCR reactor 301 and providing oxygen required by denitration reaction into the SCR reactor 301; the catalyst holder 306 is used for holding the SCR denitration catalyst 307 and the air preheater two 308.

Further, the discharge device 400 comprises a third induced draft fan 401 and a chimney 402, specifically, the output end of the third induced draft fan 401 is communicated with the inner cavity of the chimney 402 through a conduit; the model of the third fan 401 is set to be 1.4-8 GDF, and the third fan 401 is used for pumping the gas in the SCR reactor 301 into the chimney 402 and discharging the gas.

The implementation scenario is specifically as follows: when the utility model is used, flue gas combusted in the combustion chamber 101 enters the spray deacidification tower 103 through the guide pipe, the temperature sensor 304 detects the temperature in the spray deacidification tower 103 in real time, and the temperature in the spray deacidification tower 103 is maintained above 400 ℃ through the air preheater 104, the flue gas is desulfurized in the spray deacidification tower 103, the flue gas after desulfurization enters the auxiliary tower, the flue gas in the auxiliary tower is pumped into the ceramic dust collector 202 by the draught fan I201 for dedusting, the flue gas after dedusting by the ceramic dust collector 202 enters the SCR reactor 301, the ammonia in the ammonia tank is vaporized and sent into the SCR reactor 301 by the vaporizer 310, the air is pumped into the SCR reactor 301 by the fan II 302, the ammonia, the oxygen in the air and the oxide of nitrogen react to generate water and nitrogen, and the denitration process of the flue gas is completed; finally, a third fan 401 pumps the gas of the SCR reactor 301 into a chimney 402 for emission.

The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solutions described above. Therefore, any simple modifications or equivalent replacements made according to the technical solution of the present invention belong to the scope of the claimed invention as far as possible.

Claims

1. The utility model provides a SOx/NOx control dust pelletizing system, includes desulphurization unit (100), dust collector (200), denitrification facility (300) and discharging equipment (400), its characterized in that: the dust removal device (200) is arranged on the right side of the desulfurization device (100), the denitration device (300) is arranged on the right side of the dust removal device (200), and the discharge device (400) is arranged on the right side of the denitration device (300);

the desulfurization device (100) comprises a combustion chamber (101), wherein the combustion chamber (101) is fixedly connected with a spray deacidification tower (103) through a guide pipe, a fan (105) and an air preheater I (104) are fixedly installed on the outer wall of the left end of the spray deacidification tower (103), an air outlet at the top of the spray deacidification tower (103) is fixedly connected with an auxiliary tower (102), and a temperature sensor (304) is fixedly installed on the inner wall of the spray deacidification tower (103);

the dust removal device (200) comprises a first induced draft fan (201) and a ceramic dust remover (202), wherein the output end of the first induced draft fan (201) is fixedly connected with the input end of the ceramic dust remover (202) through a guide pipe;

the denitration device (300) comprises an SCR reactor (301), a flue gas distribution plate (305) and a catalyst containing piece (306) are fixedly installed on the inner wall of the SCR reactor (301), an SCR denitration catalyst (307) is arranged in the catalyst containing piece (306), a draught fan II (302) is arranged at the top of the SCR reactor (301), an air preheater II (308) is fixedly installed on the outer wall of the left end of the SCR reactor (301), an ammonia tank (309) and a vaporizer (310) are fixedly installed on the outer wall of the SCR reactor (301), the air outlet of the ammonia tank (309) is fixedly connected with the air inlet of the vaporizer (310) through a guide pipe, and a temperature sensor (304) is fixedly installed on the inner wall of the SCR reactor (301);

and the discharge device (400) comprises a third induced draft fan (401) and a chimney (402), wherein the output end of the third induced draft fan (401) is communicated with the inner cavity of the chimney (402) through a guide pipe.

2. The desulfurization, denitrification and dust removal system of claim 1, wherein: the output end of the fan (105) is fixedly connected with the input end of the first air preheater (104) through a guide pipe, and the output end of the first air preheater (104) is communicated with the inner cavity of the spray deacidification tower (103) through a guide pipe.

3. The desulfurization, denitrification and dust removal system of claim 1, wherein: the output end of the induced draft fan II (302) is fixedly connected with the air inlet of the SCR reactor (301) through a guide pipe, and the output end of the air preheater II (308) is fixedly connected with the air inlet of the SCR reactor (301) through a guide pipe.

4. The desulfurization, denitrification and dust removal system of claim 1, wherein: the air outlet of the vaporizer (310) is fixedly connected with the air inlet of the SCR reactor (301) through a conduit.

5. The desulfurization, denitrification and dust removal system of claim 1, wherein: the gas outlet of the secondary tower (102) is fixedly connected with the input end of the induced draft fan I (201) through a guide pipe, and the output end of the ceramic dust collector (202) is fixedly connected with the gas inlet of the SCR reactor (301) through a guide pipe.

6. The desulfurization, denitrification and dust removal system of claim 1, wherein: and the air outlet of the SCR reactor (301) is fixedly connected with the input end of the induced draft fan III (401) through a guide pipe.

7. The desulfurization, denitrification and dust removal system of claim 1, wherein: the reaction temperature of the spray deacidification tower (103) is set to be more than 400 ℃, and the reaction temperature of the SCR reactor (301) is set to be 280-400 ℃.