Desulfurization, denitration and dust removal device for boiler tail gas
By designing a boiler exhaust gas desulfurization and denitrification dust removal device, and using the cooperation of the dust collector and the treatment agent placement seat, the problem of insufficient contact between the desulfurization catalyst and the denitrition catalyst and the waste gas is solved, achieving more efficient desulfurization and denitrification effects and lower particulate emissions.
Patent Information
- Application Number
- CN202420629904.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-03-29
AI Technical Summary
In the dry desulfurization and denitrification equipment, the contact between the desulfurization catalyst and the denitrogenation catalyst and the sulfur and nitrate in the exhaust gas is insufficient, resulting in poor desulfurization and denitrogenation effects.
A boiler exhaust gas desulfurization, denitrification and dust removal device is designed, including two sets of processing chambers and dust collectors. A treatment agent placing seat and a dust collector are installed in the treatment room. Through the cooperation of the dust collector and the treatment agent placing seat, the exhaust gas flows in all directions in the cylinder and is fully in contact with the desulfurization catalyst or denitrification catalyst.
By fully contacting the catalyst, the desulfurization and denitrification effects of the waste gas are improved, the impurity content of particulate matter in the waste gas emission is reduced, and the purification effect is significantly improved.
Smart Images
Figure CN222586123U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boiler tail gas treatment, in particular to a boiler tail gas desulfurization, denitration and dust removal device. 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 denitration of boiler tail gas, the exhaust gas needs to contact with the desulfurization catalyst and the denitration catalyst during the flow process, so as to produce an oxidation reaction and remove impurities in the exhaust gas. In the existing desulfurization and denitration equipment, the contact between the desulfurization catalyst and the denitration catalyst and the sulfur and nitrate in the exhaust gas is often insufficient. For example, the desulfurization device and the denitration device can adsorb more sulfur and nitrate at one end of the air intake, but not much at the end far from the air intake. Utility Model Content
[0004] 1. Technical issues to be resolved
[0005] The utility model provides a boiler tail gas desulfurization, denitration and dust removal device, which solves the problem of insufficient contact between the desulfurization catalyst and the denitration catalyst in the dry desulfurization and denitration equipment of the boiler tail gas and the sulfur and nitrate in the exhaust gas.
[0006] (II) Technical solution
[0007] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a boiler exhaust desulfurization, denitrification and dust removal device, comprising two groups of treatment chambers that are connected and supported on a base, and exhaust pipes connected to the ends of the two groups of treatment chambers, the treatment chambers comprising a cylinder, a cover plate, a plurality of treatment agent placement seats, sliding covers equal to the number of treatment agent placement seats, and a dust collector, one end of the cylinder is formed with an opening, the cover plate is detachably covered at the opening of the cylinder, a plurality of treatment agent placement seats are fixed along the cover plate on a side of the cover plate facing the inner cavity of the cylinder, a sliding cover is detachably connected to the outer side of each treatment agent placement seat, a plurality of small holes are formed on the outer wall of the treatment agent placement seat, the dust collector is supported and fixed in the inner cavity of the cylinder, and the dust collector is located between the plurality of treatment agent placement seats, the air inlet end of the dust collector extends to the outside of the cylinder, and the air outlet end of the dust collector is located between the plurality of treatment agent placement seats.
[0008] Preferably, the processing chamber further comprises a plurality of guide buckles, wherein the plurality of guide buckles are formed on the inner wall of the cylinder, and each processing agent placement seat is inserted into a gap between two adjacent guide buckles.
[0009] It is further preferred that the two groups of treatment chambers are used as desulfurization chambers and denitrification chambers respectively, the inner cavity of the treatment agent placement seat of the desulfurization chamber is filled with a desulfurization catalyst, and the inner cavity of the treatment agent placement seat of the denitrification chamber is filled with a denitrification catalyst.
[0010] It is further preferred that the dust collector includes a diverter hood, a first pressure cover, a support rod, a support seat and a filter layer, a plurality of air outlet holes are formed on the outer wall of the diverter hood, and the plurality of air outlet holes constitute the air outlet end of the dust collector, openings are formed at both ends of the diverter hood, the first pressure cover and the support seat respectively cover the openings at both ends of the diverter hood, the support rod is formed on the side of the first pressure cover facing away from the diverter hood, and the support rod is fixedly connected to the inner wall of the cylinder, the support seat extends into the inner cavity of the diverter hood, and the filter layer can be removably inserted into the middle gap of the support seat.
[0011] It is further preferred that the support seat includes a second pressure cover, an air inlet pipe, a first double-ring frame, a second double-ring frame and a multi-section limiting frame, the second pressure cover covers the opening at one end of the diversion cover, the air inlet pipe is formed in the middle of the second pressure cover and communicates with the inner cavity of the diversion cover, the first double-ring frame is formed on the side of the second pressure cover facing the inner cavity of the diversion cover, the second double-ring frame is connected and fixed to the first double-ring frame by a multi-section limiting frame, and the middle gaps of the first double-ring frame, the second double-ring frame and the limiting frame accommodate a cylindrical filter layer.
[0012] In a further embodiment, the filter layer is configured as an electrostatic electret meltblown nonwoven fabric having a fine porous structure.
[0013] (III) Beneficial effects
[0014] Compared with the prior art, the utility model provides a boiler tail gas desulfurization, denitrification and dust removal device, which has the following beneficial effects:
[0015] 1. In the utility model, the dust collector and the treatment agent placement seat are arranged in coordination, so that the exhaust gas can flow in the cylinder after dust removal, and the exhaust gas can be more fully contacted with the desulfurization catalyst or denitrification catalyst in the treatment agent placement seat, thereby improving the desulfurization or denitrification effect of the exhaust gas.
[0016] 2. In the utility model, by using two sets of treatment chambers in combination, the waste gas can be desulfurized and denitrified, and at the same time, the waste gas can be subjected to two dust removal and filtration treatments, thereby reducing the content of particulate impurities in the waste gas emissions. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic diagram of an exploded structure of a processing chamber according to an embodiment;
[0018] Figure 2 is a schematic diagram of an exploded structure of a dust collector according to an embodiment of the present invention;
[0019] Figure 3 is a schematic structural diagram of a support base according to an implementation scheme;
[0020] Figure 4 It is a schematic diagram of the overall structure of a boiler exhaust gas desulfurization, denitrification and dust removal device according to the implementation plan.
[0021] In the figure: 10, treatment chamber; 11, cylinder; 12, guide buckle; 13, cover plate; 14, treatment agent placement seat; 15, sliding cover; 16, dust collector; 161, diversion hood; 162, first pressure cover; 163, support rod; 164, support seat; 1641, second pressure cover; 1642, air inlet pipe; 1643, first double-ring frame; 1644, second double-ring frame; 1645, limit frame; 165, filter layer; 20, base; 30, exhaust pipe. DETAILED DESCRIPTION
[0022] 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.
[0023] See also Figure 4 A boiler tail gas desulfurization, denitration and dust removal device comprises two groups of treatment chambers 10 connected and supported on a base 20, and an exhaust pipe 30 connected to the ends of the two groups of treatment chambers 10. The two groups of treatment chambers 10 are used as a desulfurization chamber and a denitration chamber respectively. The inner cavity of the treatment agent placement seat 14 of the desulfurization chamber is filled with a desulfurization catalyst, and the inner cavity of the treatment agent placement seat 14 of the denitration chamber is filled with a denitration catalyst. During the exhaust gas treatment process, the exhaust gas flows through the two groups of treatment chambers 10 in sequence, and desulfurization and denitration treatment are performed in the two groups of treatment chambers 10 respectively. In addition, dust removal treatment can also be performed in the two groups of treatment chambers 10; the exhaust gas can be discharged through the exhaust pipe 30 after treatment and purification.
[0024] See also Figure 1The treatment chamber 10 may include a cylinder 11, a plurality of guide buckles 12, a cover plate 13, a plurality of treatment agent placement seats 14, a sliding cover 15 equal in number to the number of treatment agent placement seats 14, and a dust collector 16. One end of the cylinder can be penetrated by the air inlet end of the dust collector 16, and the air inlet end of the dust collector 16 extends to the outside of the cylinder 11 so that the exhaust gas can be introduced; the other end of the cylinder 11 is formed with an opening, and the cover plate 13 is detachably covered at the opening of the cylinder 11 to cover its inner cavity. A plurality of treatment agent placement seats 14 are fixed along the cover plate 13 on the side of the cover plate 13 facing the inner cavity of the cylinder 11, and a sliding cover 15 is detachably connected to the outer side of each treatment agent placement seat 14, so that a desulfurization catalyst or a denitration catalyst can be placed in the treatment agent placement seat 14 after the sliding cover 15 is removed. The dust collector 16 is supported and fixed in the inner cavity of the cylinder 11, and the dust collector 16 is located between the multiple treatment agent placement seats 14, and the gas outlet end of the dust collector 16 is located between the multiple treatment agent placement seats 14. A plurality of small holes are formed on the outer wall of the treatment agent placement seat 14, so that the exhaust gas can flow through the small holes on the treatment agent placement seat 14 and contact the corresponding catalyst after being dusted and discharged by the dust collector 16. A plurality of guide buckles 12 are formed on the inner wall of the cylinder 11, and each treatment agent placement seat 14 is inserted into the gap between two adjacent guide buckles 12, so that the covering of the cover plate 13 and the position of the treatment agent placement seat 14 can be positioned during installation.
[0025] See also Figure 2 The dust collector 16 may include a diverter cover 161, a first gland 162, a support rod 163, a support seat 164 and a filter layer 165. A plurality of air outlets are formed on the outer wall of the diverter cover 161, and the plurality of air outlets constitute the air outlet end of the dust collector 16, so that the exhaust gas can flow through the plurality of air outlets and disperse when discharged, and the exhaust gas can contact and react with the catalysts in the plurality of treatment agent placement seats 14. Openings are formed at both ends of the diverter cover 161, and the first gland 162 and the support seat 164 are respectively covered at the openings at both ends of the diverter cover 161. The support rod 163 is formed on the side of the first gland 162 facing away from the diverter cover 161, so that the dust collector 16 as a whole is supported and fixed on the inner wall of the cylinder 11 by the support rod 163. The support seat 164 extends into the inner cavity of the diverter cover 161 at the opening at the other end of the diverter cover 161, and the filter layer 165 is detachably inserted into the middle gap of the support seat 164, so that the exhaust gas can be filtered by the filter layer 165 after flowing in from the support seat 164, and then discharged through the air outlet.
[0026] See also Figure 3The support seat 164 may include a second gland 1641, an air inlet pipe 1642, a first double-ring frame 1643, a second double-ring frame 1644 and a multi-section limit frame 1645. The second gland 1641 covers the opening at one end of the diverter cover 161, and the air inlet pipe 1642 is formed in the middle of the second gland 1641 and communicates with the inner cavity of the diverter cover 161. The first double-ring frame 1643 is formed on the side of the second gland 1641 facing the inner cavity of the diverter cover 161, and the second double-ring frame 1644 is connected and fixed to the first double-ring frame 1643 by using a multi-section limit frame 1645, so that the middle gaps of the first double-ring frame 1643, the second double-ring frame 1644 and the limit frame 1645 can accommodate the cylindrical filter layer 165.
[0027] In this embodiment, the filter layer 165 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 form an electrostatic electret melt-blown nonwoven filter paper with a fiber diameter of 2 to 5 μm. The surface of the filter layer 165 has a fine porous structure and can filter the exhaust gas and absorb particulate impurities.
[0028] In this embodiment, the desulfurization catalyst and the denitration catalyst are both known technologies in the art and will not be described in detail herein.
[0029] 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 boiler tail gas desulfurization, denitrification and dust removal device, comprising two sets of treatment chambers (10) connected and supported on a base (20), and an exhaust pipe (30) connected to the ends of the two sets of treatment chambers (10), characterized in that: The treatment chamber (10) comprises a barrel (11), a cover plate (13), a plurality of treatment agent placement seats (14), a sliding cover (15) whose number is equal to the number of the treatment agent placement seats (14), and a dust collector (16); an opening is formed at one end of the barrel (11); the cover plate (13) is detachably covered on the opening of the barrel (11); the plurality of treatment agent placement seats (14) are fixed along the cover plate (13) on one side of the cover plate (13) facing the inner cavity of the barrel (11); each A sliding cover (15) is detachably connected to the outer side of the treatment agent placement seat (14); a plurality of small holes are formed on the outer wall of the treatment agent placement seat (14); the dust collector (16) is supported and fixed in the inner cavity of the cylinder (11); and the dust collector (16) is located between the plurality of treatment agent placement seats (14); an air inlet end of the dust collector (16) extends to the outside of the cylinder (11); and an air outlet end of the dust collector (16) is located between the plurality of treatment agent placement seats (14).
2. A boiler tail gas desulfurization, denitrification and dust removal device according to claim 1, characterized in that: The treatment chamber (10) further comprises a plurality of guide buckles (12), wherein the plurality of guide buckles (12) are formed on the inner wall of the cylinder (11), and each treatment agent placement seat (14) is inserted into the gap between two adjacent guide buckles (12).
3. A boiler tail gas desulfurization, denitrification and dust removal device according to claim 1 or 2, characterized in that: The two groups of treatment chambers (10) are used as a desulfurization chamber and a denitrification chamber respectively. The inner cavity of the treatment agent placement seat (14) of the desulfurization chamber is filled with a desulfurization catalyst, and the inner cavity of the treatment agent placement seat (14) of the denitrification chamber is filled with a denitrification catalyst.
4. A boiler tail gas desulfurization, denitrification and dust removal device according to claim 1, characterized in that: The dust collector (16) comprises a diverter hood (161), a first pressure cover (162), a support rod (163), a support seat (164) and a filter layer (165). A plurality of air outlet holes are formed on the outer wall of the diverter hood (161). The plurality of air outlet holes constitute the air outlet end of the dust collector (16). Openings are formed at both ends of the diverter hood (161). The first pressure cover (162) and the support seat (164) respectively cover the openings at both ends of the diverter hood (161). The support rod (163) is formed on the side of the first pressure cover (162) facing away from the diverter hood (161), and the support rod (163) is fixedly connected to the inner wall of the cylinder (11). The support seat (164) extends into the inner cavity of the diverter hood (161). The filter layer (165) is detachably inserted into the middle gap of the support seat (164).
5. A boiler tail gas desulfurization, denitrification and dust removal device according to claim 4, characterized in that: The support seat (164) includes a second gland (1641), an air inlet pipe (1642), a first double-ring frame (1643), a second double-ring frame (1644) and a multi-section limit frame (1645); the second gland (1641) covers an opening at one end of the diverter cover (161); the air inlet pipe (1642) is formed in the middle of the second gland (1641) and communicates with the inner cavity of the diverter cover (161); the first double-ring frame (1643) is formed on the side of the second gland (1641) facing the inner cavity of the diverter cover (161); the second double-ring frame (1644) is connected and fixed to the first double-ring frame (1643) by means of a multi-section limit frame (1645); the central gaps of the first double-ring frame (1643), the second double-ring frame (1644) and the limit frame (1645) accommodate a cylindrical filter layer (165).
6. A boiler tail gas desulfurization, denitrification and dust removal device according to claim 5, characterized in that: The filter layer (165) is configured as an electrostatic electret melt-blown nonwoven fabric having a fine porous structure.