Flue gas desulfurization, denitrification and dust removal integrated equipment

Abstract

The utility model discloses flue gas desulfurization, denitrification and dust removal integrated equipment which comprises a shell, the left side of the shell is fixedly connected with a flue gas inlet pipeline, the flue gas inlet pipeline is connected with an inner pipe, the top of the shell is fixedly provided with a flue gas exhaust pipeline, the side face of the shell is fixedly provided with a sleeve, and the sleeve is connected to the inner pipe in a sleeved mode. And a desulfurization powder discharging assembly is fixedly installed at the end of the sleeve, and a sealing plate is fixedly installed in the shell. By the adoption of the structure, the most advanced dry desulfurization and ceramic filter tube desulfurization, denitrification and dust removal integrated process is adopted for transformation, the existing flue gas treatment process of high-temperature electric dust removal, SCR denitrification, semi-dry desulfurization and bag dust removal is replaced, the desulfurization, denitrification and dust removal integrated process is achieved, the inner tube is sleeved with the sleeve, and the inner tube is sleeved with the sleeve. The retention time of the flue gas is prolonged by the sleeve, the desulfurization powder discharging assembly is used for spraying and fully mixing with the flue gas, and the occupied area is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas desulfurization, in particular to an integrated flue gas desulfurization, denitrification and dust removal device. Background Technique

[0002] The flue gas desulfurization and denitrification technology is a boiler flue gas purification technology applied to the chemical industry with multiple nitrogen oxides and sulfur oxides. Nitrogen oxides and sulfur oxides are one of the main sources of air pollution. At present, the flue gas desulfurization and denitrification process flows adopted at home and abroad are mostly the same: the flue gas enters the desulfurization device and contacts the alkaline limestone slurry droplets countercurrently. The acidic oxides and other pollutants such as HCL and HF are absorbed, and the slurry after absorbing SO2 reacts to form CaSO3. Desulfurization is to remove sulfate or sulfur-containing groups, denitrification generally refers to removing nitro groups, and deacidification refers to removing the acidity of substances and restoring neutrality. The technical level of desulfurization and denitrification will directly affect the content of nitrogen oxides and sulfur oxides discharged into the air. In underdeveloped areas, most production lines are equipped with relatively backward desulfurization and denitrification equipment and technologies, which cover a large area, have a high failure rate, and at the same time, the desulfurization and denitrification effects are not ideal, causing relatively large air pollution. In developed areas, the relevant governments have relatively high environmental protection requirements, and the corresponding factories are equipped with relatively advanced desulfurization and denitrification equipment and technologies, adopting advanced automatic control systems, with a low failure rate and relatively ideal desulfurization and denitrification effects, causing relatively small air pollution.

[0003] However, the existing flue gas treatment environmental protection equipment adopts a flue gas treatment process of "high-temperature electrostatic precipitation + SCR denitrification + semi-dry desulfurization + bag dust removal", and the high-temperature electrostatic precipitator, bag filter and related equipment of the traditional flue gas treatment process make the flue gas treatment process complex and cover a large area. Content of the Utility Model

[0004] The purpose of the utility model is to solve the defects existing in the prior art, and to propose an integrated flue gas desulfurization, denitrification and dust removal device to solve the problems of complex flue gas treatment process and large floor area.

[0005] To achieve the above purpose, the utility model provides the following technical scheme:

[0006] An integrated flue gas desulfurization, denitrification and dust removal device includes a housing. A smoke inlet pipe is fixedly connected to the left side of the housing, and the smoke inlet pipe is connected to an inner pipe. A smoke exhaust pipe is fixedly installed on the top of the housing. A sleeve is fixedly installed on the side of the housing, and the sleeve is sleeved on the inner pipe. A desulfurization powder discharge assembly is fixedly installed at the end of the sleeve. A sealing plate is fixedly installed inside the housing, and a plurality of ceramic fiber filter pipes are installed on the sealing plate. A blowing assembly is installed above the ceramic fiber filter pipes.

[0007] Preferably, the desulfurization powder discharging assembly includes a powder mixing tank, the bottom of the powder mixing tank is connected with a powder injection pump, the output end of the powder injection pump is provided with a spray head, and the spray head is arranged in a sleeve.

[0008] Preferably, the end of the inner pipe is connected with a bracket, and the end of the bracket is fixedly connected with a flow guiding cover.

[0009] Preferably, the blowing assembly includes an air pump, the air pump is communicated with an air pipe, a plurality of air jet heads are connected to the air pipe, the air jet heads are arranged inside a ceramic fiber filter tube, and a solenoid valve is connected to the connecting pipe of the air jet head and the air pipe.

[0010] Preferably, a swirl plate is arranged in the sleeve.

[0011] In summary, the beneficial effects of the present utility model are as follows: An integrated flue gas desulfurization, denitrification and dust removal device provided by the present utility model is transformed by adopting the most advanced "dry desulfurization + integrated desulfurization, denitrification and dust removal with ceramic filter tubes" process, replacing the existing flue gas treatment process of "high-temperature electrostatic precipitation + SCR denitrification + semi-dry desulfurization + bag dust removal", realizing the integrated process of desulfurization, denitrification and dust removal. By setting the sleeve to sleeved the inner pipe, the sleeve extends the residence time of the flue gas, uses the desulfurization powder discharging assembly for spraying and fully mixing with the flue gas, and reduces the occupied area. And it is integrally arranged with the ceramic fiber filter tube in the shell, greatly reducing the occupied area, solving the problems of complex traditional flue gas treatment process and large floor area, and at the same time improving the reliability and continuity of the overall system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is the basic structural schematic diagram of the present utility model;

[0013] Figure 2 is of the present utility model Figure 1 partial enlarged view of structure A in.

[0014] Reference numerals: 1, shell; 2, smoke inlet pipe; 3, inner pipe; 4, smoke exhaust pipe; 5, sleeve; 6, desulfurization powder discharging assembly; 61, powder mixing tank; 62, powder injection pump; 63, spray head; 7, sealing plate; 8, ceramic fiber filter tube; 9, blowing assembly; 91, air pump; 92, air pipe; 93, air jet head; 94, solenoid valve; 10, bracket; 11, flow guiding cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0017] As Figure 1 - Figure 2 shown, an integrated flue gas desulfurization, denitrification and dust removal device provided by the present invention includes a housing 1. A smoke inlet pipe 2 is fixedly connected to the left side of the housing 1. The smoke inlet pipe 2 is connected to an inner pipe 3. A smoke exhaust pipe 4 is fixedly installed on the top of the housing 1. A sleeve 5 is fixedly installed on the side surface of the housing 1. The sleeve 5 is sleeved on the inner pipe 3. A desulfurization powder discharge assembly 6 is fixedly installed at the end of the sleeve 5. A sealing plate 7 is fixedly installed inside the housing 1. A plurality of ceramic fiber filter tubes 8 are installed on the sealing plate 7. A blowing assembly 9 is installed above the ceramic fiber filter tubes 8.

[0018] High-temperature flue gas enters the boiler system, and the flue gas is led out from the high-temperature section of the boiler. After passing through the cooling tower to ensure that the flue gas temperature is between 350 and 380 °C, the flue gas in the appropriate temperature range of 350 to 380 °C is fully mixed with the sprayed slaked lime and ammonia and then passes through the dry desulfurization system. The desulfurization powder discharge assembly 6 sprays slaked lime and ammonia for flue gas desulfurization. The sleeve 5 is sleeved to extend the mixing channel, and the sleeve 5 is sleeved on the inner pipe 3 to reduce the occupied area and achieve simplification. Then it enters the catalyst ceramic fiber filter tube 8 dust collector. A filter cake layer is formed on the surface of the ceramic fiber filter tube 8 to filter the particulate matter in the flue gas. The NH3 and NOx in the flue gas undergo an oxidation-reduction reaction under the action of the catalyst loaded on the catalyst ceramic fiber filter tube 8 to generate nitrogen and water. At the same time, the SO2 in the flue gas further reacts with the filter cake layer on the surface of the catalyst ceramic fiber filter tube 8 to improve the dry desulfurization efficiency, thereby completing the entire desulfurization, denitrification and dust removal process.

[0019] The desulfurization powder discharge assembly 6 includes a powder mixing tank 61. A powder injection pump 62 is connected to the bottom of the powder mixing tank 61. A spray head 63 is installed at the output end of the powder injection pump 62, and the spray head 63 is arranged inside the sleeve 5. The powder mixing tank 61 mixes slaked lime and ammonia, uses the powder injection pump 62 for spraying, and fully mixes with the flue gas inside the sleeve 5 from the spray head 63.

[0020] A bracket 10 is connected to the end of the inner pipe 3, and a flow deflector 11 is fixedly connected to the end of the bracket 10. By setting the bracket 10 and the flow deflector 11, the flow direction of the flue gas is changed.

[0021] The jetting assembly 9 includes an air pump 91. The air pump 91 is communicated with an air pipe 92. A plurality of jet nozzles 93 are connected to the air pipe 92. The jet nozzles 93 are arranged inside the ceramic fiber filter tube 8. An electromagnetic valve 94 is connected to the connecting pipe of the jet nozzle 93 and the air pipe 92. By setting the air pump 91, the air pipe 92 can be blown, so that the jet nozzles 93 blow the inside of the ceramic fiber filter tube 8, that is, the ceramic fiber filter tube 8 can be blown reversely. By setting the electromagnetic valve 94, the on-off of the jet nozzles 93 can be controlled intermittently, so that the ceramic fiber filter tube 8 can be blown intermittently, the filter matter can fall off, and the maintenance of the dust removal device can be reduced.

[0022] A swirl plate is arranged inside the sleeve 5. To ensure the full mixing and reaction of the flue gas and the desulfurization agent powder, it is required that the residence time of the flue gas and the desulfurization agent powder in the desulfurization reaction pipeline is not less than 4 s. The structure of the spiral baffle is used to realize the swirl effect, which can swirl and mix the desulfurization powder and the flue gas, so that the flue gas can be fully mixed with the flue gas.

[0023] Working principle: When in use, the flue gas enters from the inlet flue pipe 2, passes through the dry desulfurization system, uses the sulfur powder discharge assembly to spray slaked lime and ammonia for flue gas desulfurization, and then enters the catalyst ceramic fiber filter tube 8 dust collector. A filter cake layer is formed on the surface of the ceramic fiber filter tube 8 to filter the particulate matter in the flue gas. The NH3 and NOx in the flue gas undergo an oxidation-reduction reaction under the action of the catalyst loaded on the ceramic fiber filter tube 8 to generate nitrogen and water. At the same time, the SO2 in the flue gas further reacts with the filter cake layer on the surface of the ceramic fiber filter tube 8 to improve the dry desulfurization efficiency. By setting the air pump 91, the air pipe 92 can be blown, so that the jet nozzles 93 blow the inside of the ceramic fiber filter tube 8, that is, the ceramic fiber filter tube 8 can be blown reversely. By setting the electromagnetic valve 94, the on-off of the jet nozzles 93 can be controlled intermittently, so that the ceramic fiber filter tube 8 can be blown intermittently, the filter matter can fall off, and the maintenance of the dust removal device can be reduced, thus completing the entire desulfurization, denitrification, and dust removal process.

[0024] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present utility model, and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An integrated flue gas desulfurization, denitrification and dust removal device, comprising a housing (1), characterized in that: The left side of the shell (1) is fixedly connected to a smoke inlet pipe (2), the smoke inlet pipe (2) is connected to an inner pipe (3), the top of the shell (1) is fixedly mounted with a smoke exhaust pipe (4), the side of the shell (1) is fixedly mounted with a sleeve (5), the sleeve (5) is sleeved on the inner pipe (3), the end of the sleeve (5) is fixedly mounted with a desulfurization powder discharge assembly (6), the interior of the shell (1) is fixedly mounted with a sealing plate (7), a plurality of ceramic fiber filter tubes (8) are mounted on the sealing plate (7), and a spray assembly (9) is mounted above the ceramic fiber filter tubes (8).

2. The integrated flue gas desulfurization, denitrification and dust removal equipment according to claim 1 is characterized in that: The desulfurization powder discharge assembly (6) comprises a powder mixing box (61), the bottom of the powder mixing box (61) is connected to a powder injection pump (62), the output end of the powder injection pump (62) is equipped with a nozzle (63), and the nozzle (63) is arranged in the sleeve (5).

3. The integrated flue gas desulfurization, denitrification and dust removal equipment according to claim 1 is characterized in that: The end of the inner tube (3) is connected to a bracket (10), and the end of the bracket (10) is fixedly connected to a flow deflector (11).

4. The integrated flue gas desulfurization, denitrification and dust removal equipment according to claim 1 is characterized in that: The spray assembly (9) comprises an air pump (91), the air pump (91) being connected to an air pipe (92), the air pipe (92) being connected to a plurality of spray heads (93), the spray heads (93) being arranged inside the ceramic fiber filter tube (8), and a solenoid valve (94) being connected to a connecting pipe between the spray heads (93) and the air pipe (92).

5. The integrated flue gas desulfurization, denitrification and dust removal equipment according to claim 1 is characterized in that: A swirl plate is arranged inside the sleeve (5).

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