High-temperature denitration equipment for brick and tile kiln

Abstract

The utility model discloses a kind of brick kiln high-temperature denitration equipment, belong to kiln denitration device technical field, the brick kiln high-temperature denitration equipment, comprising: brick kiln main body, the inside of brick kiln main body is provided with multiple brick embryo frames, waste heat recovery boiler is installed in the top surface of brick kiln main body;Debit component, debit component includes: multiple spray guns, multiple compressed air pipes and multiple denitration agent pipes, multiple spray guns are installed in the top surface of brick kiln main body.The brick kiln high-temperature denitration equipment, through spray gun mixed compressed air and denitration agent, and accelerate after spraying, make denitration agent maximum degree with flue gas mixing, again minimum degree influence product quality, through existing waste heat boiler takes hot water, hot water enters preparation tank and is dissolved to denitration agent, while part hot water enters heating module, and enters cleaning water tank and denitration agent tank and is heated and heat preservation to it, improve the utilization of energy.

Description

Technical Field

[0001] This utility model relates to the technical field of kiln denitrification devices, and more specifically, to a high-temperature denitrification device for brick and tile kilns. Background Technology

[0002] Brick and tile kilns are traditional or modern industrial equipment used to fire building materials such as bricks and tiles, which harden and shape raw materials such as clay by heating them at high temperatures.

[0003] At present, the control and treatment of NOx emissions from sintering kilns in my country is urgent. Most kiln denitrification methods use direct atomized spraying in the oxidation denitrification flue. However, due to the varying lengths of the flue, the reaction time is often too short, resulting in poor denitrification effect. If the denitrification agent is sprayed before the exhaust fan, it will cause serious corrosion to the fan.

[0004] In existing production processes, since the furnace is filled with product blanks, blindly installing denitrification spray guns not only fails to ensure that the denitrification agent and flue gas are fully mixed, but also affects the quality of the product by directly spraying the denitrification agent onto the blanks. Most brick and tile kilns are equipped with waste heat boilers, and the heat from these boilers is mainly used for simple purposes such as employee bathing, resulting in a large amount of heat being wasted due to insufficient utilization. Summary of the Invention

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a high-temperature denitrification device for brick and tile kilns. This device mixes compressed air and denitrification agent with a spray gun and sprays it out at high speed, maximizing the mixing of the denitrification agent with the flue gas while minimizing the impact on product quality. Hot water is obtained from an existing waste heat boiler and enters the preparation tank to dissolve the denitrification agent. At the same time, some of the hot water enters the heating module and then enters the cleaning water tank and the denitrification agent tank for heating and insulation, thereby improving energy utilization.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] A high-temperature denitrification device for brick and tile kilns includes: a brick and tile kiln body, wherein multiple brick blank racks are arranged inside the brick and tile kiln body, and a waste heat recovery boiler is installed on the top surface of the brick and tile kiln body; a denitrification assembly, wherein the denitrification assembly includes: multiple spray guns, multiple compressed air pipes, and multiple denitrification agent pipes, wherein the multiple spray guns are all installed on the top surface of the brick and tile kiln body, the multiple compressed air pipes are detachably connected to the input end of each spray gun, and the multiple denitrification agent pipes are detachably connected to the input end of each spray gun; and a heat recovery assembly, wherein the heat recovery assembly is disposed on one side of the brick and tile kiln body for recovering waste heat.

[0008] As a preferred embodiment of this utility model, the heat recovery assembly includes: a hot water pipe, a return water pipe, a preparation tank, a cleaning water tank, and a denitrification agent tank. The hot water pipe is installed on one side of the waste heat recovery boiler, the return water pipe is installed on one side of the waste heat recovery boiler, the preparation tank is installed at one end of the hot water pipe, the cleaning water tank is located on one side of the brick and tile kiln body, and the denitrification agent tank is located on one side of the brick and tile kiln body.

[0009] As a preferred embodiment of this utility model, two heating modules are fixedly installed between one end of the hot water pipe and the return water pipe, and the two heating modules are respectively installed in the cleaning water tank and the denitrification agent tank.

[0010] As a preferred embodiment of this utility model, a heat pump is installed inside the hot water pipe, and a one-way valve is installed in both the hot water pipe and the return water pipe.

[0011] As a preferred embodiment of this utility model, the output end of the preparation tank is equipped with an outlet pipe, which extends into the denitrification agent tank.

[0012] As a preferred embodiment of this utility model, a control valve is installed inside the hot water pipe.

[0013] Compared with existing technologies, this utility model provides a high-temperature denitrification device for brick and tile kilns, which has the following beneficial effects:

[0014] This high-temperature denitrification equipment for brick and tile kilns mixes compressed air and denitrifying agent through a spray gun, accelerates the spray, and maximizes the mixing of the denitrifying agent with the flue gas while minimizing the impact on product quality. Hot water is obtained from the existing waste heat boiler and enters the preparation tank to dissolve the denitrifying agent. At the same time, some of the hot water enters the heating module and then enters the cleaning water tank and the denitrifying agent tank for heating and insulation, thereby improving energy utilization. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the present invention;

[0016] Figure 2 This is a side view of the main body of the brick and tile kiln of this utility model.

[0017] Explanation of the labels in the diagram:

[0018] 1. Main body of brick and tile kiln; 2. Heat pump; 3. Check valve; 4. Hot water pipe; 5. Return water pipe; 6. Preparation tank; 7. Control valve; 8. Cleaning water tank; 9. Denitrifying agent tank; 10. Spray gun; 11. Compressed air pipe; 12. Denitrifying agent pipe; 13. Brick blank frame. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. Example

[0020] Please see Figure 1-2 A high-temperature denitrification device for brick and tile kilns includes: a brick and tile kiln body 1, with multiple brick blank racks 13 arranged inside the brick and tile kiln body 1, and a waste heat recovery boiler installed on the top surface of the brick and tile kiln body 1; a denitrification assembly, which includes: multiple spray guns 10, multiple compressed air pipes 11, and multiple denitrifying agent pipes 12, with the multiple spray guns 10 all installed on the top surface of the brick and tile kiln body 1, the multiple compressed air pipes 11 being detachably connected to the input end of each spray gun 10, and the multiple denitrifying agent pipes 12 being detachably connected to the input end of each spray gun 10; and a heat recovery assembly, which is located on one side of the brick and tile kiln body 1 for recovering waste heat.

[0021] In a specific embodiment of this utility model, a brick frame 13 is set up in the main body 1 of the brick kiln. Then, compressed air and denitrifying agent are mixed by a spray gun 10 and sprayed out after acceleration. The spray gun is designed with a small angle or a longitudinal fan-shaped spray gun 10. When spraying denitrifying agent in the high temperature zone of 850℃-1100℃, the brick frame 13 is left as far as possible to select the ventilation space of the kiln car. The spray is carried out at a small angle and with a large depth. Since the kiln car moves longitudinally, the brick frame 13 is stacked in groups to form multiple longitudinal ventilation channels. The spray gun 10 is installed on the top of the kiln. The spray guns on both sides cover the gaps in the kiln car and the kiln wall. Multiple spray guns in the middle spray to cover the air ducts between the stacks, so that the denitrifying agent is mixed with the flue gas to the maximum extent and the impact on product quality is minimized. Hot water is taken from the existing waste heat boiler and guided through the hot water pipe 4 and the return water pipe 5. The hot water will enter the preparation tank 6 to dissolve the denitrifying agent. At the same time, some hot water enters the heating module and enters the cleaning water tank 8 and the denitrifying agent tank 9 for heating and heat preservation, which improves the energy utilization rate.

[0022] Specifically, the heat recovery assembly includes: hot water pipe 4, return water pipe 5, preparation tank 6, cleaning water tank 8, and denitrification agent tank 9. Hot water pipe 4 is installed on one side of the waste heat recovery boiler, return water pipe 5 is installed on one side of the waste heat recovery boiler, preparation tank 6 is installed at one end of hot water pipe 4, cleaning water tank 8 is located on one side of the brick and tile kiln body 1, and denitrification agent tank 9 is located on one side of the brick and tile kiln body 1.

[0023] In this embodiment, water storage and transportation are accomplished through hot water pipe 4, return water pipe 5, waste heat recovery boiler and heating module, thereby achieving heat recovery and heating and insulation effects.

[0024] Specifically, two heating modules are fixedly installed between one end of the hot water pipe 4 and the return water pipe 5. The two heating modules are respectively installed in the cleaning water tank 8 and the denitrification agent tank 9.

[0025] In this embodiment, the hot water pipe 4 and the return water pipe 5 are connected by a heating module, so that the hot water will not come into contact with the inside of the cleaning water tank 8 and the denitrification agent tank 9.

[0026] Specifically, a heat pump 2 is installed inside the hot water pipe 4, and a one-way valve 3 is installed in both the hot water pipe 4 and the return water pipe 5.

[0027] In this embodiment, water is pumped from the waste heat recovery boiler by the heat pump 2, thereby completing the water flow.

[0028] Specifically, the output end of the preparation tank 6 is equipped with an outlet pipe that extends into the denitrification agent tank 9.

[0029] In this embodiment, the dissolved denitrifying agent in the preparation tank 6 is discharged through the discharge pipe and enters the denitrifying agent tank 9.

[0030] Specifically, a control valve 7 is installed inside the hot water pipe 4.

[0031] In this embodiment, hot water backflow is prevented by controlling valve 7.

[0032] Working principle: Brick blank racks 13 are set up in the main body 1 of the brick kiln. Then, compressed air and denitrifying agent are mixed by spray guns 10 and sprayed out after acceleration. The design of small-angle spray guns or longitudinal fan-shaped spray guns 10 is used to spray denitrifying agent in the high temperature zone of 850℃-1100℃. The brick blank racks 13 are arranged to select the ventilation space of the kiln car as much as possible. The spray is small-angle and deep. Since the kiln car moves longitudinally, the brick blank racks 13 are stacked in groups to form multiple longitudinal ventilation channels. The spray guns 10 are installed on the top of the kiln. The spray guns on both sides cover the gaps in the kiln car and the kiln wall. Multiple spray guns 10 in the middle spray to cover the air ducts between stacks, so that the denitrifying agent is mixed with the flue gas to the maximum extent and the impact on product quality is minimized. Hot water is taken from the existing waste heat boiler and guided through hot water pipes 4 and return water pipes 5. The hot water will enter the preparation tank 6 to dissolve the denitrifying agent. At the same time, some hot water enters the heating module and then enters the cleaning water tank 8 and the denitrifying agent tank 9 for heating and heat preservation, which improves the energy utilization rate.

[0033] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A high-temperature denitrification device for brick and tile kilns, characterized in that, include: The brick and tile kiln body (1) is provided with multiple brick blank racks (13) inside the brick and tile kiln body (1), and a waste heat recovery boiler is installed on the top surface of the brick and tile kiln body (1). A denitrification assembly, comprising: multiple spray guns (10), multiple compressed air pipes (11), and multiple denitrifying agent pipes (12), wherein the multiple spray guns (10) are all installed on the top surface of the brick kiln body (1), the multiple compressed air pipes (11) are detachably connected to the input end of each spray gun (10), and the multiple denitrifying agent pipes (12) are detachably connected to the input end of each spray gun (10); and A heat recovery component is provided on one side of the brick and tile kiln body (1) to recover waste heat.

2. The high-temperature denitrification equipment for brick and tile kilns according to claim 1, characterized in that: The heat recovery assembly includes: a hot water pipe (4), a return water pipe (5), a preparation tank (6), a cleaning water tank (8), and a denitrification agent tank (9). The hot water pipe (4) is installed on one side of the waste heat recovery boiler, the return water pipe (5) is installed on one side of the waste heat recovery boiler, the preparation tank (6) is installed at one end of the hot water pipe (4), the cleaning water tank (8) is located on one side of the brick and tile kiln body (1), and the denitrification agent tank (9) is located on one side of the brick and tile kiln body (1).

3. The high-temperature denitrification equipment for brick and tile kilns according to claim 2, characterized in that: Two heating modules are fixedly installed between one end of the hot water pipe (4) and the return water pipe (5), and the two heating modules are respectively set in the cleaning water tank (8) and the denitrification agent tank (9).

4. The high-temperature denitrification equipment for brick and tile kilns according to claim 3, characterized in that: A heat pump (2) is installed inside the hot water pipe (4), and a one-way valve (3) is installed inside both the hot water pipe (4) and the return water pipe (5).

5. The high-temperature denitrification equipment for brick and tile kilns according to claim 4, characterized in that: The output end of the preparation tank (6) is equipped with an outlet pipe that extends into the denitrification agent tank (9).

6. The high-temperature denitrification equipment for brick and tile kilns according to claim 5, characterized in that: A control valve (7) is installed inside the hot water pipe (4).

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