Biomass boiler flue gas desulfurization, denitrification, dust removal and ultralow emission device

Abstract

The utility model discloses a biomass boiler flue gas desulfurization denitration dedusting ultralow emission device relates to flue gas treatment technical field, including biomass boiler and processing mechanism, processing mechanism includes high temperature economizer, multi-tube dedusting equipment, bag-type dust collector, low temperature SCR denitration equipment and low temperature economizer, high temperature economizer is connected with biomass boiler, multi-tube dedusting equipment, bag-type dust collector, low temperature SCR denitration equipment and low temperature economizer. The multi-tube dust removal equipment is connected with the high-temperature coal economizer, the bag-type dust remover is connected with the multi-tube dust removal equipment, the low-temperature SCR denitration equipment is connected with the bag-type dust remover, and the low-temperature coal economizer is connected with the low-temperature SCR denitration equipment. Compared with the traditional wet desulfurization process, the dry desulfurization process disclosed by the utility model has the advantages that the occupied area, the investment cost, the operation cost and the construction period are saved, the secondary sewage treatment investment caused by the wet desulfurization process is avoided, and compared with the traditional flue gas dust removal, desulfurization and denitrification process, the occupied area, the investment and the operation and maintenance cost are reduced; the resource utilization rate is improved, so that the economic benefits of enterprises are increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas treatment technical field especially relates to a kind of biomass boiler flue gas desulfurization and denitrification dust removal ultra-low emission device. BACKGROUND

[0002] Currently, the desulfurization and denitrification of coal-fired flue gas generally uses "limestone-gypsum desulfurization and NH3 selective catalytic reduction method" denitrification, however, the respective management of SO2 and NO X , there are problems such as large floor area, complex equipment, high investment and operation cost, low utilization value of byproduct, secondary pollution, etc., which are difficult to meet the increasingly stringent environmental protection requirements, therefore, we propose a kind of biomass boiler flue gas desulfurization and denitrification dust removal ultra-low emission device. UTILITY MODEL CONTENT

[0003] The utility model aims at providing a kind of biomass boiler flue gas desulfurization and denitrification dust removal ultra-low emission device to solve the problems raised in the above background technology.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of biomass boiler flue gas desulfurization and denitrification dust removal ultra-low emission device, comprising:

[0005] Biomass boiler, the biomass boiler is used to discharge high-temperature flue gas;

[0006] Processing mechanism, the processing mechanism includes high-temperature economizer, multi-tube dust removal equipment, bag-type dust collector, low-temperature SCR denitrification equipment and low-temperature economizer, the high-temperature economizer is connected with biomass boiler, the multi-tube dust removal equipment is connected with high-temperature economizer, the bag-type dust collector is connected with multi-tube dust removal equipment, the low-temperature SCR denitrification equipment is connected with bag-type dust collector, the low-temperature economizer is connected with low-temperature SCR denitrification equipment, the side of low-temperature economizer is provided with discharge mechanism, the external of multi-tube dust removal equipment is provided with grinding mechanism.

[0007] Preferably, the discharge mechanism includes chimney and induced draft fan, the chimney is connected with the output end of induced draft fan, heating mechanism is arranged between induced draft fan and low-temperature economizer.

[0008] Preferably, the heating mechanism includes air preheater, the input end of air preheater is connected with low-temperature economizer, the output end of air preheater is connected with induced draft fan.

[0009] Preferably, the grinding mechanism includes grinder, the input end of grinder is provided with first storage mechanism, the output end of grinder is provided with second storage mechanism.

[0010] Preferably, the first storage mechanism comprises a sodium bicarbonate raw material bin, and the discharge port of the sodium bicarbonate raw material bin is connected with the input end of the grinder.

[0011] Preferably, the second storage mechanism comprises a fine sodium bicarbonate bin, the output end of the grinder is connected with the feeding port of the fine sodium bicarbonate bin, and the fine sodium bicarbonate bin is provided with a feeding mechanism between the fine sodium bicarbonate bin and the multi-tube dust removal equipment.

[0012] Preferably, the feeding mechanism comprises an SDS desulfurizer injection and uniform distribution equipment, the input end of the SDS desulfurizer injection and uniform distribution equipment is connected with the discharge port of the fine sodium bicarbonate bin, and the output end of the SDS desulfurizer injection and uniform distribution equipment is connected with the multi-tube dust removal equipment.

[0013] The technical effects and advantages of the present application are as follows:

[0014] The whole system of the present application does not need a water pump, the dry desulfurization can adjust the use frequency of the electric equipment according to the sulfur content, meanwhile, the high-temperature cloth bag is no longer the bottleneck of limiting the exhaust gas temperature, the low-temperature coal economizer is arranged after the cloth bag dust collector, the flue gas temperature can be reduced to below 80 degrees Celsius, the heat efficiency is improved, meanwhile, the integrated arrangement improves the service life of the cloth bag and the catalyst, the high-temperature area also prevents the cloth bag from being pasted, the SCR denitration catalyst is arranged after the cloth bag dust collector, the flue gas is clean, the catalyst poisoning and blockage phenomenon are effectively prevented, the maintenance cost is reduced, compared with the traditional wet desulfurization process, the dry desulfurization process saves the land occupation area, saves the investment cost, the operation cost and the construction period, meanwhile, the wet desulfurization process brings the sewage secondary treatment investment, compared with the traditional flue gas dust removal and desulfurization and denitration process, the present application reduces the land occupation area, the investment and operation cost, improves the resource utilization rate, and thus increases the economic benefit of enterprises. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a whole structure schematic view of the present application.

[0016] In the drawing: 101, biomass boiler; 102, high-temperature coal economizer; 103, multi-tube dust removal equipment; 104, cloth bag dust collector; 105, low-temperature SCR denitration equipment; 106, low-temperature coal economizer; 201, grinder; 301, sodium bicarbonate raw material bin; 401, fine sodium bicarbonate bin; 501, SDS desulfurizer injection and uniform distribution equipment; 601, chimney; 602, induced draft fan; 701, air preheater. DETAILED DESCRIPTION

[0017] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0018] The utility model provides a kind of biomass boiler flue gas desulfurization and denitrification dust removal ultra-low emission device as Figure 1 As shown in a kind of biomass boiler flue gas desulfurization and denitrification dust removal ultra-low emission device provided by the utility model, including biomass boiler 101 and processing mechanism, biomass boiler 101 is used to discharge high-temperature flue gas, coal is burned during the working process of biomass boiler 101, biomass resources are converted into heat energy, and high-temperature high-pressure flue gas is generated in biomass boiler 101;

[0019] In a preferred embodiment, the processing mechanism comprises a high-temperature economizer 102, a multi-tube dust removal device 103, a bag-type dust collector 104, a low-temperature SCR denitration device 105, and a low-temperature economizer 106, the high-temperature economizer 102 is connected with the biomass boiler 101, the multi-tube dust removal device 103 is connected with the high-temperature economizer 102, the bag-type dust collector 104 is connected with the multi-tube dust removal device 103, the low-temperature SCR denitration device 105 is connected with the bag-type dust collector 104, the bag-type dust collector 104 and the low-temperature SCR denitration device 105 are integrally arranged, the low-temperature economizer 106 is connected with the low-temperature SCR denitration device 105, one side of the low-temperature economizer 106 is provided with a discharge mechanism, the outside of the multi-tube dust removal device 103 is provided with a grinding mechanism, the high-temperature flue gas discharged by the biomass boiler 101 enters the high-temperature economizer 102, the high-temperature economizer 102 is heated, the temperature of the flue gas is reduced, the temperature of the flue gas after passing through the high-temperature economizer 102 is 240 degrees Celsius, then the flue gas enters the multi-tube dust removal device 103 to be subjected to multi-tube dust removal and SDS dry desulfurization, then enters the bag-type dust collector 104 to be subjected to high-temperature bag-type dust removal, then enters the low-temperature SCR denitration device 105 to be subjected to low-temperature SCR denitration, then enters the low-temperature economizer 106 to be subjected to heat recovery again, the whole system does not need a water pump, the dry desulfurization can adjust the use frequency of the electric equipment according to the sulfur content, the bag-type dust collector is no longer a bottleneck for limiting the flue gas temperature, the low-temperature economizer 106 arranged after the bag-type dust collector 104 can reduce the flue gas temperature to below 80 degrees Celsius, improves the heat efficiency, the integrated arrangement improves the service life of the bag-type dust collector and the catalyst, the high-temperature zone also prevents the bag-type dust collector from being clogged, the SCR denitration catalyst is arranged after the bag-type dust collector 104, the flue gas is clean, effectively prevents the catalyst from being poisoned and blocked, reduces the maintenance cost, compared with the traditional wet desulfurization process, the dry desulfurization process saves the land occupation, investment cost, operation cost, construction period, and avoids the sewage secondary treatment investment caused by the wet desulfurization process, compared with the traditional flue gas dust removal and desulfurization and denitration process, the process reduces the land occupation, investment and operation cost, improves the resource utilization rate, and thus increases the economic benefit of enterprises.

[0020] The discharge mechanism comprises a chimney 601 and an induced draft fan 602, the chimney 601 is connected with the output end of the induced draft fan 602, a heating mechanism is arranged between the induced draft fan 602 and the low-temperature economizer 106, the heating mechanism comprises an air preheater 701, the input end of the air preheater 701 is connected with the low-temperature economizer 106, the output end of the air preheater 701 is connected with the induced draft fan 602, the flue gas discharged from the low-temperature economizer 106 passes through the air preheater 701, then passes through the induced draft fan 602, and is discharged from the chimney 601, the arrangement of the air preheater 701 reduces the temperature of the discharged flue gas to below 80 degrees Celsius.

[0021] The grinding mechanism comprises a grinder 201, the input end of the grinder 201 is provided with a first storage mechanism, the output end of the grinder 201 is provided with a second storage mechanism, the first storage mechanism comprises a sodium bicarbonate raw material bin 301, the discharge port of the sodium bicarbonate raw material bin 301 is connected with the input end of the grinder 201, the second storage mechanism comprises a fine sodium bicarbonate bin 401, the output end of the grinder 201 is connected with the feeding port of the fine sodium bicarbonate bin 401, the fine sodium bicarbonate bin 401 is provided with a feeding mechanism between the fine sodium bicarbonate bin 401 and the multi-tube dust removal equipment 103, the feeding mechanism comprises SDS desulfurizer injection and distribution equipment 501, the input end of the SDS desulfurizer injection and distribution equipment 501 is connected with the discharge port of the fine sodium bicarbonate bin 401, the output end of the SDS desulfurizer injection and distribution equipment 501 is connected with the multi-tube dust removal equipment 103, the sodium bicarbonate is SDS desulfurizer, the sodium bicarbonate discharged from the sodium bicarbonate raw material bin 301 is ground through the grinder 201, the ground sodium bicarbonate is stored in the fine sodium bicarbonate bin 401, when the desulfurizer is needed, the sodium bicarbonate is injected into the multi-tube dust removal equipment 103 through the SDS desulfurizer injection and distribution equipment 501, and then the flue gas desulfurization work can be performed.

[0022] Finally, it should be noted that: the above only for the preferred embodiments of the utility model have described, and do not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. made within the spirit and principles of the utility model, should be contained in the protection scope of the utility model.

Claims

1. A biomass boiler flue gas desulfurization, denitrification, and dust removal ultra-low emission device, characterized in that, include: A biomass boiler (101) is used to discharge high-temperature flue gas; The processing mechanism includes a high-temperature economizer (102), a multi-tube dust collector (103), a bag filter (104), a low-temperature SCR denitrification device (105), and a low-temperature economizer (106). The high-temperature economizer (102) is connected to the biomass boiler (101), the multi-tube dust collector (103) is connected to the high-temperature economizer (102), the bag filter (104) is connected to the multi-tube dust collector (103), the low-temperature SCR denitrification device (105) is connected to the bag filter (104), and the low-temperature economizer (106) is connected to the low-temperature SCR denitrification device (105). A discharge mechanism is provided on one side of the low-temperature economizer (106), and a grinding mechanism is provided on the outside of the multi-tube dust collector (103).

2. The ultra-low emission device for desulfurization, denitrification, and dust removal of biomass boiler flue gas according to claim 1, characterized in that, The emission mechanism includes a chimney (601) and an induced draft fan (602). The chimney (601) is connected to the output end of the induced draft fan (602), and a heating mechanism is provided between the induced draft fan (602) and the low-temperature economizer (106).

3. The ultra-low emission device for desulfurization, denitrification, and dust removal of biomass boiler flue gas according to claim 2, characterized in that, The heating mechanism includes an air preheater (701), the input end of which is connected to a low-temperature economizer (106), and the output end of which is connected to an induced draft fan (602).

4. The ultra-low emission device for desulfurization, denitrification, and dust removal of biomass boiler flue gas according to claim 1, characterized in that, The grinding mechanism includes a grinder (201), the input end of which is provided with a first storage mechanism, and the output end of which is provided with a second storage mechanism.

5. The ultra-low emission device for desulfurization, denitrification, and dust removal of biomass boiler flue gas according to claim 4, characterized in that, The first storage mechanism includes a sodium bicarbonate raw material silo (301), the outlet of which is connected to the input end of a grinding mill (201).

6. The ultra-low emission device for desulfurization, denitrification, and dust removal of biomass boiler flue gas according to claim 4, characterized in that, The second storage mechanism includes a fine sodium bicarbonate silo (401), the output end of the grinder (201) is connected to the inlet of the fine sodium bicarbonate silo (401), and a feeding mechanism is provided between the fine sodium bicarbonate silo (401) and the multi-tube dust removal device (103).

7. The ultra-low emission device for desulfurization, denitrification, and dust removal of biomass boiler flue gas according to claim 6, characterized in that, The feeding mechanism includes an SDS desulfurizing agent injection and distribution device (501), the input end of which is connected to the outlet of the fine sodium bicarbonate silo (401), and the output end of which is connected to the multi-tube dust removal device (103).

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