Desulfurization and denitrification device for thermal power plant

Abstract

The utility model discloses a desulfurization and denitrification device for a thermal power plant, which relates to the field of desulfurization and denitrification devices and comprises feeding pipes, catalytic reaction materials are conveyed in the feeding pipes by gas, the feeding pipes are diffused into a plurality of groups of feeding pipes through one or more uniform distributors, the tail ends of the feeding pipes are connected to a spray gun, the spray gun is arranged on the side wall of a boiler, and the spray gun is connected with the boiler. A spray head of the spray gun is positioned in the boiler; a high-pressure gas source is further arranged to provide high-pressure gas, the high-pressure gas source is connected with a gas pipe, the tail end of the gas pipe is connected to the spray gun, and the high-pressure gas is conveyed to the spray gun through the gas pipe. The improved boiler is low in cost and high in operability; the materials can be fully and uniformly diffused into the boiler, the diffusion degree of the catalytic reaction materials in the boiler is improved, and the desulfurization and denitrification reaction efficiency is improved; and the uniform distributor performs anti-blocking detection by adopting an observation window or a camera, so that the response efficiency of discovering that the catalytic reaction material is blocked is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of desulfurization and denitration devices, in particular to a desulfurization and denitration device for a thermal power plant. Background Art

[0002] The thermal power plant industry uses coal as the main energy source for power generation. During the combustion process, a large amount of waste gas is emitted. The waste gas contains a large amount of sulfide and nitrate. If the waste gas is directly discharged into the atmosphere, it will cause serious pollution to the environment. The desulfurization and denitrification equipment of thermal power plants is used to treat these waste gases containing a large amount of sulfur and nitrate.

[0003] One of the desulfurization and denitrification processes uses in-furnace desulfurization and denitrification, that is, reactants or catalysts are sprayed into the furnace to promote the conversion or decomposition of sulfides and nitrates. However, the existing desulfurization and denitrification devices occupy a large area, the boiler modification cost is high, the equipment investment is large, and even the operating efficiency of the boiler is affected.

[0004] Therefore, it is necessary to develop a low-cost and high-efficiency desulfurization and denitrification device for thermal power plants. Utility Model Content

[0005] The utility model aims to design a desulfurization and denitration device for a thermal power plant in view of the deficiencies in the prior art, so as to solve the problems of high boiler transformation cost and low desulfurization and denitration efficiency.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a desulfurization and denitrification device for a thermal power plant, which adopts the following technical scheme, including: a feed pipe, in which catalytic reaction materials are transported by gas, and the feed pipe is diffused into multiple groups of feed pipes via one or more equal distributors, and the end of the feed pipe is connected to a spray gun, and the spray gun is arranged on the side wall of the boiler, and the nozzle of the spray gun is located inside the boiler; a high-pressure gas source is also provided to provide high-pressure gas, and the high-pressure gas source is connected to an air pipe, and the end of the air pipe is connected to the spray gun, and the high-pressure gas is transported to the spray gun via the air pipe.

[0007] Furthermore, the equal distributor includes a cavity, the top of the cavity is hemispherical, a connecting cone is provided at the bottom of the cavity, the diameter of the connecting cone is wide at the top and narrow at the bottom, a fixed flange is provided at the bottom of the connecting cone, a feed port is provided in the middle of the fixed flange, and a plurality of discharge ports are provided at the top of the cavity.

[0008] Furthermore, an observation window is provided on the side wall of the equal distributor, and a glass window is used for observation in the middle of the observation window.

[0009] Furthermore, a through hole is provided in the middle of the glass window, a rotating shaft is provided in the through hole, a cleaning operating rod is provided on the rotating shaft outside the glass window, and a cleaning scraping rod is provided on the rotating shaft inside the glass window.

[0010] Furthermore, a camera is arranged on the inner side wall of the equal distributor.

[0011] Furthermore, the spray gun includes an outer sleeve, a mounting flange is provided at one end of the outer sleeve, the mounting flange is fixedly arranged on the side wall of the boiler, an injection pipe is provided inside the outer sleeve, one end of the injection pipe is a feed inlet, the feed inlet is connected to the feed pipe, and the other end of the injection pipe is a nozzle; an air inlet is provided between the inner wall of one end of the outer sleeve and the outer wall of the injection pipe, the air inlet is connected to the air pipe, and an air outlet is provided between the inner wall of the other end of the outer sleeve and the outer wall of the injection pipe.

[0012] Furthermore, the nozzle comprises two parts separated from each other, and a fan-shaped spray port is arranged between the two parts of the nozzle separated from each other.

[0013] Furthermore, a front injection port is provided at the front end of the two separated upper and lower nozzle parts.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The cost of transforming the boiler by using this utility model is low and the operability is strong;

[0016] 2. The nozzle of the spray gun of the utility model is set as a fan, which can make the material fully and evenly diffuse into the boiler, thereby improving the efficiency of desulfurization and denitrification reactions;

[0017] 3. The catalytic reaction material channel and the high-pressure gas channel in the spray gun of the utility model adopt a split design, which can improve the diffusion degree of the catalytic reaction material in the boiler and also improve the desulfurization and denitrification reaction efficiency;

[0018] 4. The equal-distributor of the utility model adopts an observation window or a camera to perform anti-blockage detection, which effectively improves the response efficiency of detecting blockage of catalytic reaction materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the layout structure of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the equal distributor of the utility model;

[0021] Figure 3 This is another structural schematic diagram of the equal distributor of the utility model from another perspective;

[0022] Figure 4 It is a structural schematic diagram of the observation window in the equal-distributor of the utility model;

[0023] Figure 5 This is a half-section structural diagram of the equal distributor of the utility model;

[0024] Figure 6 It is a structural schematic diagram of the spray gun of the utility model;

[0025] Figure 7 This is a schematic diagram of the structure of the feed inlet of the spray gun of the utility model;

[0026] Figure 8 It is a structural schematic diagram of the spray gun nozzle of the utility model.

[0027] In the figure: 1-equal distributor; 2-spray gun; 3-boiler; 4-high-pressure gas source; 5-feed pipe; 6-gas pipe; 101-cavity; 102-connecting cone; 103-fixing flange; 104-feed port; 105-discharge port; 106-observation window; 107-glass window; 108-cleaning operating lever; 109-rotating shaft; 110-cleaning scraper rod; 111-camera; 201-outer sleeve; 202-mounting flange; 203-injection pipe; 204-feed port; 205-air inlet; 206-nozzle; 207-front injection port; 208-fan injection port; 209-air outlet. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0029] In the description of the present invention, it should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] like Figure 1-Figure 8As shown, the utility model is a desulfurization and denitrification device for a thermal power plant, comprising: a feed pipe 5, in which catalytic reaction materials are transported by gas, the feed pipe 5 is diffused into multiple groups of feed pipes 5 via one or more equal distributors 1, the end of the feed pipe 5 is connected to a spray gun 2, the spray gun 2 is arranged on the side wall of a boiler 3, and the nozzle 206 of the spray gun 2 is located inside the boiler 3; a high-pressure gas source 4 is also provided to provide high-pressure gas, the high-pressure gas source 4 is connected to an air pipe 6, the end of the air pipe 6 is connected to the spray gun 2, and the high-pressure gas is transported to the spray gun 2 via the air pipe 6.

[0032] Specifically, the equal distributor 1 includes a cavity 101, the top of the cavity 101 is hemispherical, a connecting cone 102 is arranged at the bottom of the cavity 101, the diameter of the connecting cone 102 is wide at the top and narrow at the bottom, a fixed flange 103 is arranged at the bottom of the connecting cone 102, and a feed port 104 is arranged in the middle of the fixed flange 103. After the catalytic reaction material enters from the feed port 104, it diffuses along the connecting cone 102 and moves to the top of the hemispherical shape, and then enters the next section of the feed pipe 5 through a plurality of discharge ports 105 at the top.

[0033] In actual operation, the number of the discharge ports 105 of the equal distributor 1 is usually 2-10.

[0034] Since the catalytic reaction material conveyed by the equal distributor 1 is a powder material, there is a certain probability that blockage will occur in the equal distributor 1 during operation, which will affect the conveying of the material. Therefore, an observation window 106 is designed to be provided on the side wall of the equal distributor 1, and a glass window 107 is used for observation in the middle of the observation window 106; and long-term powder material conveying will cause the inside of the glass window 107 to be covered with materials, which is not conducive to observation. Therefore, a through hole is provided in the middle of the glass window 107, and a rotating shaft 109 is provided on the through hole. A cleaning operating rod 108 is provided on the outside of the glass window 107, and a cleaning scraper 110 is provided on the inside of the glass window 107. The observer can operate the cleaning operating rod 108 on the outside to rotate, which can drive the cleaning scraper 110 to scrape off the powder material on the inside of the glass window 107.

[0035] At the same time, a camera 111 may be arranged on the inner wall of the equal distributor 1, so as to remotely observe whether blockage of the catalytic reaction materials occurs in real time during monitoring.

[0036] Specifically, the spray gun 2 includes an outer sleeve 201, one end of which is provided with a mounting flange 202, which is fixedly arranged on the side wall of the boiler 3, an injection pipe 203 is arranged inside the outer sleeve 201, one end of the injection pipe 203 is a feed port 204, which is connected to the feed pipe 5, and the other end of the injection pipe 203 is a nozzle 206; an air inlet 205 is arranged between the inner wall of one end of the outer sleeve 201 and the outer wall of the injection pipe 203, and the air inlet 205 is connected to the air pipe 6, an air outlet 209 is arranged between the inner wall of the other end of the outer sleeve 201 and the outer wall of the injection pipe 203, and a front injection port 207 is arranged at the front end of the two-part nozzle 206 separated from each other.

[0037] In a specific embodiment, the nozzle 206 includes two parts separated from each other, and a fan-shaped injection port 208 is provided between the two parts of the nozzle 206. The fan-shaped injection port 208 can make the material fully and evenly diffuse into the boiler, thereby improving the efficiency of the desulfurization and denitrification reactions.

[0038] The above embodiments are only preferred embodiments of the present invention. The above descriptions do not limit the protection scope of the present invention in turn. The above descriptions are exemplary and not exhaustive. Therefore, any equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention. Without departing from the scope and spirit of the described embodiments, many modifications and changes are obvious to ordinary technicians in this technical field.

Claims

1. A desulfurization and denitrification device for a thermal power plant, characterized in that: include: A feed pipe (5), in which catalytic reaction materials are transported by gas, the feed pipe (5) is diffused into multiple groups of feed pipes (5) via one or more equal distributors (1), the end of the feed pipe (5) is connected to a spray gun (2), the spray gun (2) is arranged on the side wall of the boiler (3), and the nozzle (206) of the spray gun (2) is located inside the boiler (3); a high-pressure gas source (4) is also provided to provide high-pressure gas, the high-pressure gas source (4) is connected to an air pipe (6), the end of the air pipe (6) is connected to the spray gun (2), and the high-pressure gas is transported to the spray gun (2) via the air pipe (6).

2. A desulfurization and denitrification device for a thermal power plant according to claim 1, characterized in that: The equal distributor (1) comprises a cavity (101), the top of the cavity (101) is hemispherical, a connecting cone (102) is arranged at the bottom of the cavity (101), the diameter of the connecting cone (102) is wide at the top and narrow at the bottom, a fixing flange (103) is arranged at the bottom of the connecting cone (102), a feed port (104) is arranged in the middle of the fixing flange (103), and a plurality of discharge ports (105) are arranged at the top of the cavity (101).

3. A desulfurization and denitrification device for a thermal power plant according to claim 2, characterized in that: The side wall of the equal distributor (1) is provided with an observation window (106), and a glass window (107) is used for observation in the middle of the observation window (106).

4. A desulfurization and denitrification device for a thermal power plant according to claim 3, characterized in that: A through hole is provided in the middle of the glass window (107), a rotating shaft (109) is sleeved in the through hole, a cleaning operating rod (108) is provided on the outside of the glass window (107) on the rotating shaft (109), and a cleaning scraping rod (110) is provided on the inside of the glass window (107) on the rotating shaft (109).

5. A desulfurization and denitrification device for a thermal power plant according to claim 2, characterized in that: A camera (111) is arranged on the inner side wall of the equal distributor (1).

6. A desulfurization and denitrification device for a thermal power plant according to claim 1, characterized in that: The spray gun (2) comprises an outer sleeve (201), one end of which is provided with a mounting flange (202), the mounting flange (202) being fixedly mounted on the side wall of the boiler (3), an injection pipe (203) being arranged inside the outer sleeve (201), one end of which is a feed inlet (204), the feed inlet (204) being connected to the feed pipe (5), and the other end of which is a nozzle (206); an air inlet (205) is arranged between the inner wall of one end of the outer sleeve (201) and the outer wall of the injection pipe (203), the air inlet (205) being connected to the air pipe (6), and an air outlet (209) is arranged between the inner wall of the other end of the outer sleeve (201) and the outer wall of the injection pipe (203).

7. A desulfurization and denitrification device for a thermal power plant according to claim 6, characterized in that: The nozzle (206) comprises two parts separated from each other, and a fan-shaped spray port (208) is arranged between the two parts of the nozzle (206) separated from each other.

8. A desulfurization and denitrification device for a thermal power plant according to claim 7, characterized in that: A front injection port (207) is provided at the front end of the two-part spray head (206) separated into upper and lower parts.

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