Desulfurization and denitrification dust remover for boiler flue gas purification

Abstract

The utility model relates to a desulfurization denitration deduster for boiler flue gas purification, which comprises a desulfurization chamber and a denitration chamber, the desulfurization chamber is communicated with the denitration chamber through a communicating pipe, the bottom end of the denitration chamber is communicated with an exhaust pipe, the desulfurization denitration deduster also comprises a dedusting chamber, the input end of the dedusting chamber is connected with an external flue gas pipeline, and the output end of the dedusting chamber is connected with an external flue gas pipeline. And the output end of the dust removal chamber is communicated with the desulfurization chamber. The dust removal chamber is matched with the desulfurization chamber and the denitration chamber, so that the flue gas can be subjected to dust removal treatment by utilizing equipment during purification, desulfurization and denitration, and the flue gas does not need to be additionally connected with dust removal equipment in the purification treatment and emission process; the first motor can be utilized to rotate through the filter screen cover in the dust removal chamber, so that the accumulation of dust impurities on the filter screen cover can be reduced by utilizing centrifugal force when the filter screen cover is used for filtering flue gas and intercepting dust, and the problem that the flue gas is unsmooth in circulation when flowing through the dust removal chamber after the equipment is used for a long time is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler tail gas treatment, in particular to a desulfurization and denitrification dust collector for boiler flue gas purification. Background Art

[0002] The boiler is one of the main equipment in a thermal power plant, usually used in conjunction with a steam turbine and a generator. It converts the thermal energy of the fuel into mechanical energy for the rotation of the steam turbine, and finally converts it into electrical energy through the generator. In the process of thermal power generation, some flue gas that is harmful to the human body is generated, so a desulfurization and denitrification device is needed to purify the gas.

[0003] In the process of dry desulfurization and denitrification of boiler exhaust gas, the exhaust gas needs to contact with the desulfurization catalyst and the denitrification catalyst during the flow process, so as to produce an oxidation reaction and remove impurities in the exhaust gas. However, when using the existing desulfurization and denitrification equipment for boiler flue gas purification, it is necessary to connect additional dust removal equipment such as bag filters to filter particulate impurities in the exhaust gas, and the dust removal equipment is easily blocked by particulate impurities after long-term use, affecting the input and flow of flue gas. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The utility model provides a desulfurization and denitrification dust collector for boiler flue gas purification, which solves the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a desulfurization and denitrification dust collector for boiler flue gas purification, comprising a desulfurization chamber and a denitrification chamber, the desulfurization chamber and the denitrification chamber are connected by a connecting pipe, the bottom end of the denitrification chamber is connected with an exhaust pipe, and it also includes a dust removal chamber, the input end of the dust removal chamber is connected to an external flue gas pipeline, the output end of the dust removal chamber is connected to the desulfurization chamber, the dust removal chamber comprises a cover body, a lower end cover, an upper end cover, a filter screen cover and a first motor, the upper and lower ends of the cover body have openings, and the outer An input end connected to an external flue gas duct is formed on the wall, the lower end cover and the upper end cover are respectively fixedly connected to the bottom opening and the top opening of the cover body, and the lower end cover and the upper end cover are sealed to the cover body, the filter screen cover is rotatably arranged on the lower end cover and the upper end cover, the first motor is mounted and fixed on the upper end cover, and the output end of the first motor is connected to the filter screen cover, so that the first motor drives the rotation of the filter screen cover, and the dust removal chamber also includes a filter layer, the filter layer is bonded and fixed to the outer wall of the positioning cylinder, and the filter layer covers the outer wall of the positioning cylinder.

[0008] Preferably, the filter screen cover includes a positioning cylinder, two limiting plates, a plurality of air outlet grooves and a connecting shaft. The positioning cylinder is configured to be cylindrical, and the plurality of air outlet grooves are formed on the outer wall of the positioning cylinder. The two limiting plates are respectively formed at the top and bottom ends of the positioning cylinder, and the two limiting plates are respectively embedded in the upper end cover and the lower end cover. The connecting shaft is formed in the inner middle part of the positioning cylinder, and the top end of the connecting shaft is connected to the output end of the first motor. The height of the positioning cylinder is adapted to the spacing between the upper end cover and the lower end cover, and the outer diameter of the positioning cylinder is smaller than the inner diameter of the cover body.

[0009] It is further preferred that the desulfurization chamber includes a base, a second motor and a toggling blade, the upper end and the lower end of the base are respectively connected to the dust removal chamber and the denitrification chamber, the second motor is mounted and fixed on the outer wall of the base, and the output end of the second motor is connected to the end of the toggling blade located in the base, so that the toggling blade is driven to rotate in the base, the inner cavity of the base is filled with a desulfurization catalyst, and the desulfurization chamber also includes a leak-proof plate, which is embedded and fixed at the connection between the base and the connecting pipe, and a plurality of small holes are formed on the surface of the leak-proof plate.

[0010] (III) Beneficial effects

[0011] Compared with the prior art, the utility model provides a desulfurization and denitrification dust collector for boiler flue gas purification, which has the following beneficial effects:

[0012] In the utility model, by coordinating the dust removal chamber with the desulfurization chamber and the denitrification chamber, the flue gas can also be subjected to dust removal treatment by the equipment during purification, desulfurization and denitrification, so that the flue gas does not need to be additionally connected to dust removal equipment during the purification and discharge process; the filter screen cover in the dust removal chamber can be rotated by the first motor, so that the filter screen cover can utilize centrifugal force to reduce the accumulation of dust and impurities on the filter screen cover during the use of the filter screen cover to filter and intercept dust in the flue gas, thereby reducing the problem of poor circulation when the flue gas flows through the dust removal chamber after the equipment has been used for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of a desulfurization and denitrification dust collector for boiler flue gas purification according to the implementation plan;

[0014] Figure 2 is a schematic diagram of an exploded structure of a dust removal chamber according to an embodiment;

[0015] Figure 3 is a schematic structural diagram of a filter screen cover according to an implementation scheme;

[0016] Figure 4 It is a schematic diagram of the structure of the desulfurization chamber after being cut open according to the implementation scheme.

[0017] In the figure: 10, dust removal chamber; 11, cover body; 12, lower end cover; 13, upper end cover; 14, filter screen cover; 141, positioning cylinder; 142, limit plate; 143, air outlet groove; 144, connecting shaft; 15, filter layer; 16, first motor; 20, desulfurization chamber; 21, base; 22, second motor; 23, toggle blade; 24, leak-proof plate; 30, denitrification chamber; 40, connecting pipe; 50, exhaust pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1 A desulfurization and denitration dust collector for boiler flue gas purification includes a dust removal chamber 10, a desulfurization chamber 20 and a denitration chamber 30. The input end of the dust removal chamber 10 is connected to an external flue gas pipeline, the output end of the dust removal chamber 10 is connected to the desulfurization chamber 20, the desulfurization chamber 20 and the denitration chamber 30 are connected by a connecting pipe 40, and the bottom end of the denitration chamber 30 is connected with an exhaust pipe 50, so that the flue gas can be directly input into the device, and the dust removal chamber 10, the desulfurization chamber 20 and the denitration chamber 30 are used to purify the flue gas by dust removal, desulfurization and denitration.

[0020] See also Figure 2The dust removal chamber 10 includes a cover body 11, a lower end cover 12, an upper end cover 13, a filter screen cover 14, a filter layer 15 and a first motor 16. The cover body 11 has openings at both the upper and lower ends, and an input end connected to an external flue gas duct is formed on the outer wall of the cover body 11, so that the flue gas can be pre-input into the cover body 11 for dust removal. The lower end cover 12 and the upper end cover 13 are respectively fixedly connected to the bottom opening and the top opening of the cover body 11, and the lower end cover 12 and the upper end cover 13 are sealed and connected to the cover body 11, so that the two block the opening of the cover body 11. The filter screen cover 14 is rotatably set on the lower end cover 12 and the upper end cover 13, and the first motor 16 is installed and fixed on the upper end cover 13, and the output end of the first motor 16 is connected to the filter screen cover 14, so that the first motor 16 can drive the filter screen cover 14 to rotate. The filter layer 15 is bonded and fixed on the outer wall of the positioning cylinder 141, and the filter layer 15 covers the outer wall of the positioning cylinder 141. The filter layer 15 can be made of electrostatic electret melt-blown nonwoven filter paper. For example, polypropylene fiber can be electrostatically charged during the melt-blown manufacturing process to make it an electrostatic electret melt-blown nonwoven filter paper with a fiber diameter of 2 to 5 μm. The surface of the filter layer 15 has a fine porous structure and can filter the exhaust gas and absorb particulate impurities.

[0021] See also Figure 3 The filter screen cover 14 includes a positioning cylinder 141, two limiting plates 142, a plurality of air outlet grooves 143 and a connecting shaft 144. The positioning cylinder 141 is set to be cylindrical, and a plurality of air outlet grooves 143 are formed on the outer wall of the positioning cylinder 141, so that the smoke can flow through the air outlet grooves 143 for filtration. Two limiting plates 142 are respectively formed at the top and bottom ends of the positioning cylinder 141, and the two limiting plates 142 are respectively embedded in the upper end cover 13 and the lower end cover 12. The height of the positioning cylinder 141 is adapted to the spacing between the upper end cover 13 and the lower end cover 12. The outer diameter of the positioning cylinder 141 is smaller than the inner diameter of the cover body 11, so that the positioning cylinder 141 can be limited by the upper end cover 13 and the lower end cover 12 when rotating, and the smoke can be filtered in the cover body 11 by the filter layer 15 and the air outlet grooves 143, and then discharged downward from the inner cavity of the positioning cylinder 141.

[0022] See also Figure 4 The desulfurization chamber 20 includes a base 21, a second motor 22, and a toggle blade 23. The upper end and the lower end of the base 21 are respectively connected to the dust removal chamber 10 and the denitrification chamber 30. The second motor 22 is fixed on the outer wall of the base 21, and the output end of the second motor 22 is connected to the end of the toggle blade 23 located in the base 21, so that the toggle blade 23 can be driven to rotate in the base 21. The inner cavity of the base 21 is filled with a desulfurization catalyst, so that the toggle blade 23 can stir the desulfurization catalyst when it rotates, so that it can better contact with the input flue gas and perform desulfurization treatment.

[0023] In this embodiment, the desulfurization chamber 20 also includes a leak-proof plate 24, which is embedded and fixed at the connection between the base 21 and the connecting pipe 40, and a plurality of small holes are formed on the surface of the leak-proof plate 24, so that the airflow can flow through the leak-proof plate 24 and the falling of the reagent can be prevented.

[0024] In this embodiment, the denitrification chamber 30 may also adopt the same structural setting as the desulfurization chamber 20 , and the difference between the two may only be that the base of the denitrification chamber 30 is filled with a denitrification catalyst, and the leak-proof plate of the denitrification chamber 30 is arranged at the connection between it and the exhaust pipe 50 .

[0025] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described one by one here. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A desulfurization and denitration dust remover for boiler flue gas purification, comprising a desulfurization chamber (20) and a denitration chamber (30), wherein the desulfurization chamber (20) and the denitration chamber (30) are connected by a connecting pipe (40), and an exhaust pipe (50) is provided at the bottom of the denitration chamber (30), and further comprising a dust removal chamber (10), wherein the input end of the dust removal chamber (10) is connected to an external flue gas pipeline, and the output end of the dust removal chamber (10) is connected to the desulfurization chamber (20), in, The dust removal chamber (10) comprises a cover body (11), a lower end cover (12), an upper end cover (13), a filter screen cover (14) and a first motor (16); the cover body (11) has openings at both upper and lower ends, and an input end connected to an external smoke pipe is formed on the outer wall of the cover body (11); the lower end cover (12) and the upper end cover (13) are respectively fixedly connected to the bottom opening and the top opening of the cover body (11), and the lower end cover (12) and the upper end cover (13) are sealedly connected to the cover body (11); the filter screen cover (14) is rotatably arranged on the lower end cover (12) and the upper end cover (13); the first motor (16) is mounted and fixed on the upper end cover (13), and the output end of the first motor (16) is connected to the filter screen cover (14), so that the first motor (16) drives the filter screen cover (14) to rotate.

2. The desulfurization and denitrification dust collector for boiler flue gas purification according to claim 1 is characterized in that: The filter screen cover (14) comprises a positioning cylinder (141), two limiting plates (142), a plurality of air outlet grooves (143) and a connecting shaft (144); the positioning cylinder (141) is configured to be cylindrical, and the plurality of air outlet grooves (143) are formed on the outer wall of the positioning cylinder (141); the two limiting plates (142) are respectively formed at the top and bottom ends of the positioning cylinder (141), and the two limiting plates (142) are respectively embedded in the upper end cover (13) and the lower end cover (12); the connecting shaft (144) is formed in the inner middle part of the positioning cylinder (141), and the top end of the connecting shaft (144) is connected to the output end of the first motor (16).

3. The desulfurization and denitrification dust collector for boiler flue gas purification according to claim 2 is characterized in that: The height of the positioning tube (141) is matched to the distance between the upper end cover (13) and the lower end cover (12), and the outer diameter of the positioning tube (141) is smaller than the inner diameter of the cover body (11).

4. A desulfurization and denitrification dust collector for boiler flue gas purification according to any one of claims 1 to 3, characterized in that: The dust removal chamber (10) further comprises a filter layer (15), wherein the filter layer (15) is bonded and fixed to the outer wall of the positioning cylinder (141), and the filter layer (15) covers the outer wall of the positioning cylinder (141).

5. The desulfurization and denitrification dust collector for boiler flue gas purification according to claim 1 is characterized in that: The desulfurization chamber (20) comprises a base (21), a second motor (22) and a toggling blade (23); the upper end and the lower end of the base (21) are respectively connected to the dust removal chamber (10) and the denitrification chamber (30); the second motor (22) is mounted and fixed on the outer wall of the base (21); and the output end of the second motor (22) is connected to the end of the toggling blade (23) located in the base (21), so that the toggling blade (23) is driven to rotate and is arranged in the base (21); and the inner cavity of the base (21) is filled with a desulfurization catalyst.

6. The desulfurization and denitrification dust collector for boiler flue gas purification according to claim 5 is characterized in that: The desulfurization chamber (20) further comprises a leak-proof plate (24), which is embedded and fixed at the connection between the base (21) and the connecting pipe (40), and a plurality of small holes are formed on the surface of the leak-proof plate (24).

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