Biomass boiler flue gas wet desulphurization equipment

Abstract

The utility model relates to the technical field of flue gas desulfurization, and in particular relates to wet desulfurization equipment for flue gas of a biomass boiler. Comprising a treatment tower, a gas inlet pipe and an auxiliary mechanism, the included angle between the gas inlet pipe and the treatment tower is 60 degrees, the auxiliary mechanism comprises a supporting plate, a first guide pipe, a second guide pipe, an overflow pipe, a plug, a spraying device and a guiding-out device, and an inlet of the overflow pipe is lower than the lowest point of a gas outlet of the gas inlet pipe. When flue gas enters the treatment tower through the gas inlet pipe, the temperature of the flue gas can be reduced through cold and heat exchange between circulating cooling water and the flue gas, so that the treatment tower has higher high-temperature resistance, furthermore, a spraying device is arranged, and a sodium hydroxide solution is in rapid contact with the flue gas, so that rapid and sufficient desulfurization is realized; therefore, the high-temperature resistance of equipment can be effectively improved during use, and the desulfurization efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas desulfurization, in particular to a biomass boiler flue gas wet desulfurization device. Background Art

[0002] Whether it is traditional coal-fired power generation or emerging waste combustion power generation, biomass combustion power generation, etc., they will produce air pollutants such as NOX, SO2, heavy metals, fly ash, etc., which bring great harm to human production and life.

[0003] In the flue gas treatment system using biomass as fuel, it is found that the fly ash produced after biomass combustion contains a variety of heavy metals and their inorganic salts, and has low porosity, high viscosity and strength. If a traditional honeycomb or plate SCR denitrification device is used for denitrification before a bag-type dust collector, the fly ash containing alkaline metals will come into contact with the catalyst during the operation of the process, causing the catalyst to be deactivated, thereby reducing the denitrification efficiency and affecting the long-term stable operation of the denitrification system. At the same time, when the existing desulfurization tower is performing flue gas desulfurization, the temperature of the flue gas generated by the incineration of hazardous waste is relatively high, and the gas composition in the flue gas is relatively complex, which places relatively high requirements on the temperature resistance, corrosion resistance and deacidification efficiency of the desulfurization tower. Utility Model Content

[0004] The purpose of the utility model is to provide a biomass boiler flue gas wet desulfurization equipment, which can effectively improve the high temperature resistance of the equipment and improve the desulfurization efficiency when used.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: The utility model provides a biomass boiler flue gas wet desulfurization device, comprising a treatment tower and an air intake pipe, wherein the air intake pipe is integrally formed with the treatment tower and is located at the lower left side of the treatment tower and forms an angle of 60° with the treatment tower, and also comprises an auxiliary mechanism;

[0006] The auxiliary mechanism includes a support plate, a first conduit, a second conduit, an overflow pipe, a plug, a spray device and a guide device, the support plate is fixedly connected to the air inlet pipe and is located at one side of the air inlet pipe, the first conduit is fixedly connected to the support plate and is located at a side of the support plate close to the air inlet pipe, the second conduit is fixedly connected to the support plate and is located at a side of the support plate close to the first conduit, the overflow pipe is fixedly connected to the treatment tower and is located at the bottom side of the treatment tower, the plug is threadedly connected to the treatment tower and is located at the bottom of the treatment tower, the spray device is arranged in the treatment tower, and the guide device is arranged at the top of the treatment tower;

[0007] The inlet of the overflow pipe is lower than the lowest point of the air outlet of the air inlet pipe.

[0008] Wherein, the spray device includes a fixed plate and a conveying assembly, the fixed plate is fixedly connected to the processing tower and is arranged in a circular array on the processing tower; the conveying assembly is arranged on one side of the fixed plate.

[0009] Among them, the conveying assembly includes a conveying pipe and a conveying nozzle, the conveying pipe is fixedly connected to the fixed plate, the working part of the conveying pipe extends into the treatment tower and is located on the fixed plate; the conveying nozzle is threadedly connected to the conveying pipe and is arranged at a straight line interval at the bottom of the working part of the conveying pipe.

[0010] Among them, the export device includes a flue gas demister and an export pipe, the flue gas demister is fixedly connected to the top cover plate of the treatment tower and is located at the top of the treatment tower; the export pipe is detachably connected to the flue gas demister and is located on the air outlet of the flue gas demister.

[0011] Among them, the auxiliary mechanism also includes a matching conduit and a matching nozzle, the matching conduit is fixedly connected to the processing tower and is located above the delivery pipe; the matching nozzle is threadedly connected to the matching conduit and is arranged at a straight line interval at the bottom of the matching conduit and is located above the delivery nozzle.

[0012] The utility model discloses a biomass boiler flue gas wet desulfurization equipment, wherein an air inlet pipe and a treatment tower are integrally formed and arranged at an angle of 60 degrees, a support plate is installed on the air inlet pipe, a first conduit and a second conduit are respectively installed on the support plate, an overflow pipe is installed on the treatment tower, an inlet of the overflow pipe is lower than the lowest point of an air outlet of the air inlet pipe, a plug is installed at the bottom of the treatment tower, a spray device is arranged in the treatment tower, and a lead-out device is arranged at the top of the treatment tower. When the flue gas is treated, circulating cooling water is respectively introduced through the first conduit and the second conduit. When the flue gas enters the treatment tower through the air inlet pipe, heat exchange is performed between the circulating cooling water and the flue gas, so that the flue gas temperature can be reduced, so that the treatment tower can have higher high temperature resistance. Furthermore, by arranging the spray device, sodium hydroxide solution is utilized to quickly contact with the flue gas, so as to realize rapid and sufficient desulfurization, thereby effectively improving the high temperature resistance of the equipment when in use, and improving the desulfurization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of the biomass boiler flue gas wet desulfurization equipment of the first embodiment of the utility model.

[0015] Figure 2 This is a schematic diagram of the installation position of the delivery nozzle of the first embodiment of the utility model.

[0016] Figure 3It is a structural schematic diagram of a support plate according to the first embodiment of the utility model.

[0017] Figure 4 This is a schematic diagram of the overall structure of a biomass boiler flue gas wet desulfurization device according to the second embodiment of the utility model.

[0018] Figure 5 This is a schematic diagram of the installation position of the matching nozzle of the second embodiment of the utility model.

[0019] In the figure: 101-treatment tower, 102-air inlet pipe, 103-support plate, 104-first conduit, 105-second conduit, 106-overflow pipe, 107-plug, 108-fixing plate, 109-delivery pipe, 110-delivery nozzle, 111-smoke demister, 112-export pipe, 201-matching conduit, 202-matching nozzle. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Embodiment 1:

[0022] like Figures 1 to 3 As shown, Figure 1 It is the overall structural diagram of the biomass boiler flue gas wet desulfurization equipment. Figure 2 is a schematic diagram of the setting position of the delivery nozzle 110, Figure 3 It is a structural schematic diagram of the support plate 103. The utility model provides a biomass boiler flue gas wet desulfurization equipment: including a treatment tower 101, an air inlet pipe 102 and an auxiliary mechanism, the air inlet pipe 102 is at an angle of 60° with the treatment tower 101, the auxiliary mechanism includes a support plate 103, a first conduit 104, a second conduit 105, an overflow pipe 106, a plug 107, a spray device and a lead-out device, the spray device includes a fixed plate 108 and a conveying assembly, the conveying assembly includes a conveying pipe 109 and a conveying nozzle 110, the lead-out device includes a flue gas demister 111 and a lead-out pipe 112, and the inlet of the overflow pipe 106 is lower than the lowest point of the air outlet of the air inlet pipe 102. Through the above scheme, it can be achieved that the high temperature resistance of the equipment can be effectively improved during use, and the desulfurization efficiency can be improved. It can be understood that the above scheme can effectively improve the high temperature resistance of the equipment and improve the desulfurization efficiency.

[0023] In this embodiment, the air intake pipe 102 is integrally formed with the treatment tower 101 and is located at the lower left side of the treatment tower 101 and is at an angle of 60° to the treatment tower 101. The connecting flange of the air intake pipe 102 is connected to the connecting flange of the flue gas exhaust pipe of the biomass boiler through a screw nut. The air intake pipe 102 is set at an angle of 60° to the treatment tower 101, and the fixing bolts of the treatment tower 101 are installed using a countersunk type.

[0024] The support plate 103 is fixedly connected to the air inlet pipe 102 and is located at one side of the air inlet pipe 102; the first conduit 104 is fixedly connected to the support plate 103 and is located at a side of the support plate 103 close to the air inlet pipe 102; the second conduit 105 is fixedly connected to the support plate 103 and is located at a side of the support plate 103 close to the first conduit 104; the overflow pipe 106 is fixedly connected to the treatment tower 101 and is located at the bottom side of the treatment tower 101; the plug 107 is threadedly connected to the treatment tower 101 and is located at the bottom of the treatment tower 101; the spray device is arranged in the treatment tower 101; the export device is arranged at the top of the treatment tower 101; the support plate 103 is installed on the outside of the installation cavity of the air inlet pipe 102 by bolts; the first conduit 104 and the second conduit 105 are of the same size. , are all U-shaped, one side is the water inlet, and is connected to the external circulating cooling water input pipe, the other side is the water return port, and is connected to the return water pipeline. During installation, the mounting plates of the first conduit 104 and the second conduit 105 are respectively mounted on the support plate 103 by bolts, and two second conduits 105 are provided. The mounting plate of the overflow pipe 106 is mounted on the outside of the overflow port of the treatment tower 101 by bolts, and its output side flange is connected to the external delivery pipeline. A threaded drain hole is provided at the bottom of the treatment tower 101 to facilitate the direct installation of the plug 107. An inner hexagonal cavity is provided on the plug 107 to facilitate the insertion of an inner hexagonal wrench. After the plug 107 is disassembled, the internal cleaning sewage can be exported. The spray device is provided in the treatment tower 101 for spraying sodium hydroxide solution, and the export device is provided at the top of the treatment tower 101 for discharging the treated flue gas.

[0025] The inlet of the overflow pipe 106 is lower than the lowest point of the outlet of the air inlet pipe 102. After the flue gas is desulfurized by the sodium hydroxide solution, part of the product flows back to the bottom of the tower with the solution. When the position of the solution rises to the height of the overflow port, it can flow out from the overflow port and the overflow pipe 106.

[0026] Secondly, the fixed plate 108 is fixedly connected to the treatment tower 101 and arranged in a circular array on the treatment tower 101; the conveying assembly is arranged on one side of the fixed plate 108. The fixed plate 108 is installed on the treatment tower 101 by bolts, arranged in a circular array, and the number can be set according to the usage. This application describes the working processing method by setting three groups. The conveying assembly is arranged on one side of the fixed plate 108 for conveying and spraying the sodium hydroxide solution.

[0027] Then, the delivery pipe 109 is fixedly connected to the fixing plate 108, the working part of the delivery pipe 109 extends into the treatment tower 101 and is located on the fixing plate 108; the delivery nozzle 110 is threadedly connected to the delivery pipe 109 and is arranged at the bottom of the working part of the delivery pipe 109. The fixing flange of the delivery pipe 109 is installed on the fixing plate 108 by bolts, and its internal delivery channel does not penetrate, the connection flange of the delivery pipe 109 is connected to the external sodium hydroxide solution delivery pipeline, and the threaded installation end of the delivery nozzle 110 will be directly installed in the threaded liquid outlet hole at the bottom of the delivery pipe 109 for spraying sodium hydroxide solution.

[0028] Finally, the flue gas demister 111 is fixedly connected to the top cover plate of the treatment tower 101 and is located at the top of the treatment tower 101; the outlet pipe 112 is detachably connected to the flue gas demister 111 and is located at the gas outlet of the flue gas demister 111. The flue gas demister 111 adopts a baffle plate demister made of polypropylene, and its mounting flange is bolted to the outside of the gas outlet of the cover plate at the top of the treatment tower 101. The connecting flange of the outlet pipe 112 is connected to the outlet connecting flange of the flue gas demister 111 through a screw nut. By setting the flue gas demister 111, the moisture content in the flue gas can be reduced, which is conducive to reducing the corrosion of the flue gas to the pipeline.

[0029] When the utility model is used to effectively improve the high temperature resistance of the equipment and the desulfurization efficiency, during the flue gas treatment, first, circulating cooling water is introduced through the first conduit 104 and the second conduit 105 respectively. When the flue gas enters the treatment tower 101 through the air inlet pipe 102, the circulating cooling water exchanges heat with the flue gas, which can reduce the flue gas temperature, so that the treatment tower 101 can have a higher high temperature resistance. Further, after the flue gas enters the treatment tower 101, the flue gas moves from bottom to top. At this time, the sodium hydroxide solution is transported into the treatment tower 101 through the multiple conveying pipes 109, and the sodium hydroxide solution moves from top to bottom. It is sprayed out by the delivery nozzle 110 and contacts and reacts with the flue gas, and the flue gas temperature can be further reduced during desulfurization. Then, the desulfurized flue gas passes through the flue gas demister 111 to reduce the moisture content and reduce the corrosiveness, and is finally discharged through the outlet pipe 112. After the flue gas is desulfurized by the sodium hydroxide solution, part of the product flows back to the bottom of the tower with the solution. When the position of the solution rises to the overflow port height position, it can flow out from the overflow port and the overflow pipe 106, so that the sodium hydroxide solution can be used to quickly contact with the flue gas, and rapid and sufficient desulfurization can be achieved, thereby effectively improving the high temperature resistance of the equipment and improving the desulfurization efficiency when in use.

[0030] Embodiment 2:

[0031] like Figure 4 and Figure 5 As shown, Figure 4 It is the overall structural diagram of the biomass boiler flue gas wet desulfurization equipment. Figure 5 It is a schematic diagram of the setting position of the matching nozzle 202. On the basis of the first embodiment, the utility model provides a biomass boiler flue gas wet desulfurization device, and the auxiliary mechanism also includes a matching duct 201 and a matching nozzle 202.

[0032] The matching conduit 201 is fixedly connected to the treatment tower 101 and is located above the delivery pipe 109; the matching nozzle 202 is threadedly connected to the matching conduit 201 and is arranged at the bottom of the matching conduit 201 with a space between the two and is located above the delivery nozzle 110. A rectangular plate is welded on the matching conduit 201 for easy installation. The rectangular plate is fixed to the outside of the installation cavity of the treatment tower 101 by bolts. The connection flange of the matching conduit 201 is connected to the connection flange of the external sodium hydroxide solution delivery pipe by a screw nut. The threaded installation part of the matching nozzle 202 is directly installed in the threaded water outlet of the matching conduit 201.

[0033] In this embodiment, by providing the matching conduit 201 and the matching nozzle 202, the sodium hydroxide solution injection points are further increased, which is beneficial for the flue gas and the sodium hydroxide solution to fully contact and react, thereby improving the treatment efficiency.

[0034] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A biomass boiler flue gas wet desulfurization equipment, comprising a treatment tower and an air inlet pipe, wherein the air inlet pipe is integrally formed with the treatment tower and is located at the lower left side of the treatment tower and forms an angle of 60° with the treatment tower, characterized in that: It also includes auxiliary institutions; The auxiliary mechanism includes a support plate, a first conduit, a second conduit, an overflow pipe, a plug, a spray device and a guide device, the support plate is fixedly connected to the air inlet pipe and is located at one side of the air inlet pipe, the first conduit is fixedly connected to the support plate and is located at a side of the support plate close to the air inlet pipe, the second conduit is fixedly connected to the support plate and is located at a side of the support plate close to the first conduit, the overflow pipe is fixedly connected to the treatment tower and is located at the bottom side of the treatment tower, the plug is threadedly connected to the treatment tower and is located at the bottom of the treatment tower, the spray device is arranged in the treatment tower, and the guide device is arranged at the top of the treatment tower; The inlet of the overflow pipe is lower than the lowest point of the air outlet of the air inlet pipe.

2. The biomass boiler flue gas wet desulfurization equipment according to claim 1, characterized in that: The spray device comprises a fixed plate and a conveying assembly. The fixed plate is fixedly connected to the processing tower and arranged in a circular array on the processing tower. The conveying assembly is arranged on one side of the fixed plate.

3. The biomass boiler flue gas wet desulfurization equipment according to claim 2, characterized in that: The conveying assembly includes a conveying pipe and a conveying nozzle. The conveying pipe is fixedly connected to the fixed plate. The working part of the conveying pipe extends into the treatment tower and is located on the fixed plate. The conveying nozzle is threadedly connected to the conveying pipe and is arranged at a straight line interval at the bottom of the working part of the conveying pipe.

4. The biomass boiler flue gas wet desulfurization equipment according to claim 1, characterized in that: The degassing device includes a flue gas demister and a degassing pipe. The flue gas demister is fixedly connected to the top cover plate of the treatment tower and is located at the top of the treatment tower. The degassing pipe is detachably connected to the flue gas demister and is located on the gas outlet of the flue gas demister.

5. The biomass boiler flue gas wet desulfurization equipment according to claim 3, characterized in that: The auxiliary mechanism also includes a matching conduit and a matching nozzle. The matching conduit is fixedly connected to the processing tower and is located above the delivery pipe. The matching nozzle is threadedly connected to the matching conduit and is arranged at a 1 / 4 interval at the bottom of the matching conduit and is located above the delivery nozzle.

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