A temperature regulating device for a chain furnace SCR denitration system

Abstract

The utility model discloses a kind of temperature regulating device for chain grate SCR denitrification system, it is related to the field of boiler flue gas denitrification technology. Including mounting bracket, the top surface of the mounting bracket is fixedly connected with chain grate body, the top surface of the mounting bracket is provided with controller, characterized by, the temperature regulating device further includes cooling denitration component, cooling denitration component is set, by adjusting water intake, to adjust and reduce flue gas temperature, to avoid the reduction effect of high temperature carried by flue gas itself on catalyst, by setting low temperature regulating component, so that it is convenient to warm up the flue gas with lower temperature, to meet subsequent boiler full load denitrification operation, cooling denitration component and low temperature regulating component are used mutually by setting, to save raw material when fuel burner burns when flue gas temperature is insufficient, to reduce operating energy consumption and operating cost.

Description

Technical Field

[0001] This utility model relates to the field of boiler flue gas denitrification technology, specifically a temperature control device for a chain grate boiler SCR denitrification system. Background Technology

[0002] Chain grate boilers are commonly used equipment for industrial heating and power generation. Their flue gas contains a large amount of nitrogen oxides, which need to be removed by an SCR denitrification system to meet environmental standards. The core catalyst of the SCR denitrification system can only react efficiently within a specific temperature window. However, due to the combustion characteristics of chain grate boilers, the flue gas temperature is often lower than this range, resulting in a significant decrease in denitrification efficiency.

[0003] In existing technologies, when the flue gas temperature of a chain grate furnace is insufficient, additional fuel combustion is often used for heating. However, additional fuel combustion directly increases energy consumption and operating costs. Especially under low-load conditions, the amount of fuel required for heating can account for 10% to 15% of the total consumption of the chain grate furnace. At the same time, burner heating can easily lead to excessive fluctuations in flue gas temperature, exceeding the catalyst's tolerance range, accelerating catalyst sintering and aging, and shortening its service life. Therefore, there is an urgent need for a temperature control device for the SCR denitrification system of a chain grate furnace to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a temperature control device for a chain grate boiler SCR denitrification system, in order to solve the problem mentioned in the background art that when the flue gas temperature is insufficient, the traditional boiler flue gas denitrification method requires heating the flue gas by burning fuel, thereby increasing energy consumption and operating costs. At the same time, high-temperature flue gas can also easily affect the life of the catalyst.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a temperature control device for a chain grate SCR denitrification system, comprising a mounting frame, wherein the top surface of the mounting frame is fixedly connected to the chain grate furnace body, and a controller is provided on the top surface of the mounting frame; characterized in that the temperature control device further comprises:

[0006] A cooling and denitrification assembly, which is disposed on the top surface of the mounting frame, is used to regulate high-temperature flue gas;

[0007] A low-temperature regulating component is disposed on the top surface of the mounting bracket and is used to regulate low-temperature flue gas.

[0008] Preferably, the cooling and denitrification assembly includes a first temperature control box, which is fixedly connected to the top surface of the mounting frame. A smoke exhaust pipe is fixedly connected to the inner wall of the first temperature control box, and two spray plates are fixedly connected to the inner wall of the first temperature control box. A storage box is fixedly connected to the top surface of the mounting frame, and two first delivery pumps are fixedly connected to the top surface of the storage box. The input pipes of the first delivery pumps are fixedly connected to the inside of the storage box, and the output pipes of the first delivery pumps are fixedly connected to the inside of the spray plates. Both first delivery pumps are electrically connected to a controller.

[0009] Preferably, the low-temperature regulating component includes a circulation hood, which is disposed between the chain grate furnace body and the first temperature regulating box. Multiple high-temperature flue gas conveying fans are fixedly connected to the inner wall of the circulation hood. The output motors of the high-temperature flue gas conveying fans are electrically connected to the controller. Both ends of the circulation hood are fixedly connected to connecting channels, which are respectively fixedly connected to the inner wall of the flue of the chain grate furnace body and the inner wall of the first temperature regulating box.

[0010] Preferably, a mixing vessel is fixedly connected to the top surface of the mounting frame, a second delivery pump is fixedly connected to the top surface of the storage tank, the input pipe of the second delivery pump is fixedly connected to the interior of the mixing vessel, and the output pipe of the mixing vessel is fixedly connected to the interior of the storage tank.

[0011] Preferably, the controller is electrically connected to the second delivery pump and the controller is electrically connected to the motor output terminal of the mixing vessel.

[0012] Preferably, a temperature sensor is fixedly connected to the inner wall of the connection channel, and the temperature sensor is electrically connected to the controller.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] By adjusting the cooling and denitrification components, the flue gas temperature can be reduced by regulating the influent flow rate, thereby preventing the high temperature carried by the flue gas from affecting the reduction effect of the catalyst. The low-temperature regulation components facilitate the heating of the low-temperature flue gas, thus meeting the requirements of the boiler's full-load denitrification operation. The cooling and denitrification components work together to save fuel for the fuel burner when the flue gas temperature is insufficient, thereby reducing operating energy consumption and operating costs. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a partial cross-sectional view of the cooling and denitrification component of this utility model.

[0017] In the diagram: 1. Mounting frame; 2. Chain grate furnace body; 3. Cooling and denitrification assembly; 301. First temperature control box; 302. Exhaust pipe; 303. Spray plate; 304. Storage tank; 305. First transfer pump; 306. Mixing vessel; 307. Second transfer pump; 4. Low temperature control assembly; 401. Circulation hood; 402. High temperature flue gas conveying fan; 403. Connecting channel; 404. Temperature sensor. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1 - Figure 2 This utility model provides a temperature control device for a chain grate SCR denitrification system, including a mounting frame 1, a chain grate furnace body 2 fixedly connected to the top surface of the mounting frame 1, and a controller provided on the top surface of the mounting frame 1. The temperature control device further includes:

[0020] Cooling and denitrification component 3 is installed on the top surface of mounting frame 1 and is used to regulate high-temperature flue gas;

[0021] Low temperature regulating component 4 is disposed on the top surface of mounting bracket 1 and is used to regulate low temperature flue gas;

[0022] The cooling and denitrification component 3 allows for adjustment of the flue gas temperature by regulating the influent flow rate, thereby preventing the high temperature carried by the flue gas from affecting the reduction effect of the catalyst. The low-temperature regulating component 4 facilitates the heating of the low-temperature flue gas, thus meeting the requirements of the boiler's full-load denitrification operation. The cooling and denitrification component 3 and the low-temperature regulating component 4 work together to save fuel for the fuel burner when the flue gas temperature is insufficient, thereby reducing operating energy consumption and operating costs. The controller, as a common control component, is considered prior art in this technology and will not be described in detail here.

[0023] Furthermore, the cooling and denitrification assembly 3 includes a first temperature control box 301, which is fixedly connected to the top surface of the mounting frame 1. A flue gas pipe 302 is fixedly connected to the inner wall of the first temperature control box 301, and two spray plates 303 are fixedly connected to the inner wall of the first temperature control box 301. A storage box 304 is fixedly connected to the top surface of the mounting frame 1, and two first delivery pumps 305 are fixedly connected to the top surface of the storage box 304. The input pipes of the first delivery pumps 305 are fixedly connected to the inside of the storage box 304, and the output pipes of the first delivery pumps 305 are fixedly connected to the inside of the spray plates 303. Both first delivery pumps 305 are electrically connected to the controller. Through the cooling and denitrification assembly 3, the inner wall of the storage box 304 is filled with clean water. The two first delivery pumps 305 respectively deliver the clean water to the inside of the corresponding spray plates 303, and the flue gas inside the first temperature control box 301 is cooled by spraying through the two spray plates 303.

[0024] Furthermore, the low-temperature regulating component 4 includes a circulation hood 401, which is disposed between the chain grate furnace body 2 and the first temperature regulating box 301. Multiple high-temperature flue gas conveying fans 402 are fixedly connected to the inner wall of the circulation hood 401. The output motors of the high-temperature flue gas conveying fans 402 are electrically connected to the controller. Connecting channels 403 are fixedly connected to both ends of the circulation hood 401. The two connecting channels 403 are respectively fixedly connected to the inner wall of the flue of the chain grate furnace body 2 and the inner wall of the first temperature regulating box 301. Temperature sensors 404 are fixedly connected to the inner wall of the connecting channels 403. The sensor 404 is electrically connected to the controller. Through the low-temperature adjustment component 4, the blades of multiple high-temperature flue gas conveying fans 402 rotate synchronously, so that the high-temperature flue gas generated by the front chain grate boiler body 2 is directly introduced into the first temperature control box 301, thereby adjusting the flue gas temperature at low temperatures, which is convenient to meet the requirements of subsequent full-load denitrification operation of the boiler. At the same time, the temperature sensor 404 and the controller work together to facilitate real-time monitoring of the temperature passing through the circulation hood 401, so that the flue gas entering the first temperature control box 301 can maintain a good reduction range.

[0025] Furthermore, a mixing vessel 306 is fixedly connected to the top surface of the mounting frame 1, and a second delivery pump 307 is fixedly connected to the top surface of the storage tank 304. The input pipe of the second delivery pump 307 is fixedly connected to the interior of the mixing vessel 306, and the output pipe of the mixing vessel 306 is fixedly connected to the interior of the storage tank 304. The controller is electrically connected to the second delivery pump 307 and the motor output terminal of the mixing vessel 306. By setting the mixing vessel 306 and the second delivery pump 307 to work together, it is convenient to mix and stir different cooling materials according to more actual needs, and at the same time, the cooling materials are automatically delivered to the interior of the storage tank 304. By setting the controller to be electrically connected to the second delivery pump 307 and the motor output terminal of the mixing vessel 306, it is convenient to adjust the mixing speed of the mixing vessel 306 and the delivery speed of the second delivery pump 307 according to actual needs, thereby improving the overall practicality. The mixing vessel 306 is a common mixing component and is considered prior art in this technology, so it will not be described in detail here.

[0026] Working principle: During use, the temperature sensor 404 works in conjunction with the controller to facilitate real-time monitoring of the temperature of the flue gas passing through the circulation hood 401, thereby ensuring that the flue gas entering the first temperature control chamber 301 maintains a good reduction range. The cooling and denitrification component 3 ensures that the inner wall of the storage tank 304 is filled with clean water. The two first delivery pumps 305 deliver the clean water to the interior of the corresponding spray plates 303, and the flue gas inside the first temperature control chamber 301 is cooled by the spray from the two spray plates 303.

[0027] Secondly, by setting the low-temperature regulating component 4, the blades of multiple high-temperature flue gas conveying fans 402 rotate synchronously, so that the high-temperature flue gas generated by the front chain grate boiler body 2 is directly introduced into the first temperature regulating box 301, thereby regulating the flue gas temperature at low temperatures, which makes it easier to meet the subsequent full-load denitrification operation of the boiler. By setting the cooling denitrification component 3 and the low-temperature regulating component 4 to work together, the raw materials for fuel combustion when the flue gas temperature is insufficient are saved, thereby reducing operating energy consumption and operating costs.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A temperature control device for a chain grate SCR denitrification system, comprising a mounting frame (1), wherein a chain grate furnace body (2) is fixedly connected to the top surface of the mounting frame (1), and a controller is provided on the top surface of the mounting frame (1), characterized in that, The temperature control device also includes: Cooling and denitrification assembly (3), the cooling and denitrification assembly (3) is disposed on the top surface of the mounting frame (1) and is used to regulate high temperature flue gas; Low temperature regulating component (4), which is disposed on the top surface of the mounting bracket (1) and is used to regulate low temperature flue gas.

2. The temperature control device for a chain grate SCR denitrification system according to claim 1, characterized in that: The cooling and denitrification assembly (3) includes a first temperature control box (301), which is fixedly connected to the top surface of the mounting frame (1). A smoke exhaust pipe (302) is fixedly connected to the inner wall of the first temperature control box (301). Two spray plates (303) are fixedly connected to the inner wall of the first temperature control box (301). A storage box (304) is fixedly connected to the top surface of the mounting frame (1). Two first delivery pumps (305) are fixedly connected to the top surface of the storage box (304). The input pipes of the first delivery pumps (305) are all fixedly connected to the inside of the storage box (304). The output pipes of the first delivery pumps (305) are fixedly connected to the inside of the spray plates (303). Both first delivery pumps (305) are electrically connected to the controller.

3. A temperature control device for a chain grate SCR denitrification system according to claim 2, characterized in that: The low-temperature regulating component (4) includes a circulation hood (401), which is disposed between the chain grate furnace body (2) and the first temperature regulating box (301). Multiple high-temperature flue gas conveying fans (402) are fixedly connected to the inner wall of the circulation hood (401). The output motor of the high-temperature flue gas conveying fan (402) is electrically connected to the controller. Both ends of the circulation hood (401) are fixedly connected to a connecting channel (403). The two connecting channels (403) are fixedly connected to the inner wall of the flue of the chain grate furnace body (2) and the inner wall of the first temperature regulating box (301), respectively.

4. A temperature control device for a chain grate SCR denitrification system according to claim 2, characterized in that: The top surface of the mounting bracket (1) is fixedly connected to a mixing vessel (306), and the top surface of the storage tank (304) is fixedly connected to a second delivery pump (307). The input pipe of the second delivery pump (307) is fixedly connected to the interior of the mixing vessel (306), and the output pipe of the mixing vessel (306) is fixedly connected to the interior of the storage tank (304).

5. A temperature control device for a chain grate SCR denitrification system according to claim 4, characterized in that: The controller is electrically connected to the second delivery pump (307) and the controller is electrically connected to the motor output terminal of the stirring mixing vessel (306).

6. A temperature control device for a chain grate SCR denitrification system according to claim 3, characterized in that: A temperature sensor (404) is fixedly connected to the inner wall of the connection channel (403), and the temperature sensor (404) is electrically connected to the controller.

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