Device for reducing ammonia escape during cement denitration

Abstract

The utility model discloses a device for reducing ammonia escape during cement denitration, which comprises a chimney, the lower end of the inner cavity of the chimney is communicated with a groove for containing a denitration agent, the upper end of the groove is provided with a baffle plate, and the lower end of the baffle plate is arranged in the groove; according to the device for reducing cement denitration ammonia escape, soot entering from a smoke inlet in a chimney is divided and crushed into a plurality of small bubbles through a plurality of gas separation net plates, the small bubbles make full contact with clear water in the groove, nitrogen and oxygen particles in the soot bubbles are adhered and adsorbed by water molecules in the clear water, and the nitrogen and oxygen particles are separated and collected in the clear water in the groove; the low-speed flow pushing device slowly conveys clean water in the water tank into the groove, the clean water in the groove is pushed to flow, nitrogen and oxygen particles are filtered and collected on the high-temperature-resistant efficient filter, ammonia gas does not need to be added in real time according to the change of the content of nitric oxide in soot, and ammonia gas is correspondingly added in the later period according to the amount of the collected nitrogen and oxygen particles; therefore, excessive ammonia gas input is avoided, and the purpose of reducing ammonia escape is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cement denitration process, in particular to a device for reducing ammonia escape during cement denitration. Background Art

[0002] In the cement production process, the soot produced by coal combustion contains a large amount of nitrogen oxides. In order to meet environmental protection requirements, the soot needs to be denitrated to reduce the nitrogen oxides emitted in the soot into harmless nitrogen and water, thereby meeting environmental protection requirements. In the process of using the SCR denitration reactor for denitration treatment, since the nitrogen oxide content in the soot is not evenly distributed, it is difficult to accurately add ammonia as a reducing agent, which often leads to excessive emission of ammonia, that is, "ammonia escape", which not only pollutes the air, but also increases the content of ammonia oxides in the atmosphere, further aggravating environmental problems. This article aims to propose a device for reducing ammonia emissions. Utility Model Content

[0003] The purpose of the utility model is to solve the problem that in the prior art, during the denitration process using an SCR denitration reactor, the nitrogen oxide content in the soot is not evenly distributed, making it difficult to accurately add ammonia as a reducing agent, which often leads to excessive emission of ammonia, that is, the problem of "ammonia escape". In view of this, a device for reducing ammonia escape in cement denitration is proposed.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A device for reducing ammonia escape from cement denitration comprises a chimney, wherein the lower end of the chimney inner cavity is connected to a groove for containing a denitration agent, and a baffle is provided at the upper end of the groove;

[0006] The lower end of the baffle is arranged in the groove.

[0007] Preferably, the left side of the chimney inner cavity is connected with a smoke inlet, the right side of the chimney inner cavity is connected with a smoke outlet, and both sides of the lower end of the smoke outlet are respectively fixedly bent downward to be connected with a water inlet pipe and a water outlet pipe.

[0008] Preferably, a circulation filtering mechanism is connected between the water inlet pipe and the water outlet pipe, and the circulation filtering mechanism includes a low-speed flow pusher and a water tank. One side of the lower end of the water tank is connected to a liquid outlet, and the liquid outlet and the inlet of the low-speed flow pusher are connected to each other.

[0009] Preferably, a liquid injection port and a liquid inlet are connected at the upper end of the water tank, the liquid inlet and the outlet of the water outlet pipe are connected to each other, and an external thread plug is provided at the upper end of the liquid injection port.

[0010] Preferably, a plurality of air-isolating mesh plates are arranged in the groove, and two sides of the air-isolating mesh plates are respectively fixedly mounted on the lower end of the baffle and the inner wall of the groove.

[0011] Preferably, a high temperature resistant and high efficiency filter is installed in the water tank, and a handshake groove is provided on the outer side of the high temperature resistant and high efficiency filter.

[0012] Compared with the prior art, the utility model provides a device for reducing cement denitrification ammonia escape, which has the following beneficial effects:

[0013] The device for reducing ammonia escape from cement denitrification divides and breaks the soot entering the smoke inlet of the chimney into a plurality of small bubbles through a plurality of air-isolating mesh plates, which are fully in contact with the clean water in the groove, and the water molecules in the clean water adhere to and adsorb the nitrogen oxide particles in the soot bubbles, that is, the nitrogen oxide particles in the soot are filtered, separated and collected in the clean water in the groove, and then the clean water in the water tank is slowly transported to the groove by a low-speed flow pusher to promote the flow of the clean water in the groove, so that the nitrogen oxide particles flow from the water outlet pipe into the liquid inlet, and the nitrogen oxide particles are filtered and retained on the high-temperature resistant and high-efficiency filter for centralized collection. The present application centrally processes the nitrogen oxide particles, and does not need to add ammonia according to the change of nitrogen oxide content in the soot in real time. Instead, ammonia is added accordingly according to the amount of nitrogen oxide particles collected at a later stage, thereby avoiding excessive input of ammonia and achieving the purpose of reducing ammonia escape. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a device for reducing cement denitrification ammonia escape proposed by the utility model;

[0015] Figure 2 This is a cross-sectional view of a chimney in a device for reducing cement denitrification ammonia escape proposed by the utility model;

[0016] Figure 3 The utility model discloses a cross-sectional view of a water tank in a device for reducing cement denitrification ammonia escape.

[0017] In the figure: 1. Chimney; 1-1. Smoke inlet; 1-2. Smoke outlet; 1-3. Groove; 1-4. Baffle; 1-5. Air-blocking mesh plate; 2. Water inlet pipe; 3. Water outlet pipe; 4. Low-speed flow pusher; 5. Water tank; 5-1. Liquid filling port; 5-2. Liquid outlet; 5-3. Liquid inlet; 6. High-temperature resistant and high-efficiency filter; 6-1. Handshake slot; 7. External thread plug. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0020] Reference Figure 1-3 , a device for reducing cement denitrification ammonia escape, comprising a chimney 1, a groove 1-3 is connected to the lower end of the inner cavity of the middle end of the chimney 1, a baffle 1-4 is arranged just above the groove 1-3, the top of the baffle 1-4 is fixedly installed on the inner top surface of the inner cavity of the chimney 1, the lower end of the baffle 1-4 is arranged on the upper end of the groove 1-3, the left side of the inner cavity of the chimney 1 is connected with a smoke inlet 1-1, the right side of the inner cavity of the chimney 1 is connected with a smoke outlet 1-2, the groove 1-3 is mainly used to hold clean water, three air-isolating mesh plates 1-5 are fixedly connected in the groove 1-3, a plurality of densely arranged fine holes are arranged on the air-isolating mesh plates 1-5, the inner diameter of the fine holes is about 0.5-2mm, and the two sides of the air-isolating mesh plates 1-5 are respectively fixedly installed on the left side of the lower end of the baffle 1-4 and the left inner wall of the groove 1-3;

[0021] The lower end of the baffle 1-4 is inserted into the clean water, and the middle air-isolating mesh plate 1-5 is also inserted into the clean water. The lower ends of the two air-isolating mesh plates 1-5 on both sides are in the clean water, and the upper ends are mainly used to cover the clean water to reduce the natural volatilization of the clean water. That is, the soot entering the smoke inlet 1-1 in the chimney 1 will pass through the air-isolating mesh plate 1-5, and the entering soot will be divided into several small bubbles and enter the clean water in the groove 1-3, so that the soot will be fully contacted with the water molecules in the clean water as much as possible. The water molecules can adhere to and absorb the nitrogen oxide particles in the soot bubbles, that is, the nitrogen oxide particles in the soot will be adhered and retained in the clean water when passing through the clean water.

[0022] In the present embodiment, the two sides of the lower end of the groove 1-3 are respectively fixed and bent downward to be connected with an inlet pipe 2 and an outlet pipe 3, and a circulating filtering mechanism is connected between the inlet pipe 2 and the outlet pipe 3 for filtering, and the circulating filtering mechanism includes a low-speed flow pusher 4 and a water tank 5, and the upper end of the injection port 5-1 is threadedly connected with an external wire plug 7, and the low-speed flow pusher 4 is connected to an external power supply through a wire;

[0023] The upper end of the water tank 5 is fixedly connected with a liquid injection port 5-1 and a liquid inlet 5-3, the lower end of the water tank 5 is fixedly connected with a liquid outlet 5-2, the liquid outlet 5-2 is fixedly connected with the inlet of the low-speed flow pusher 4, the outlet of the low-speed flow pusher 4 is fixedly connected with the inlet of the water inlet pipe 2, the outlet of the water outlet pipe 3 is fixedly connected with the liquid inlet 5-3, when the low-speed flow pusher 4 is in working state, the low-speed flow pusher 4 slowly draws clean water in the water tank 5 through the inlet, and then transports it from the outlet of the low-speed flow pusher 4 and the water inlet pipe 2 to the groove 1-3, and then discharges it into the liquid inlet 5-3 at the upper end of the water tank 5 through the outlet pipe 3.

[0024] In this embodiment, the upper inner cavity of the water tank 5 is installed with a push-pull card connection on the high temperature resistant high efficiency filter 6, and a handshake groove 6-1 is provided on one side of the high temperature resistant high efficiency filter 6. The handshake groove 6-1 in this application can be inserted with a finger, which is convenient for manual pulling of the high temperature resistant high efficiency filter 6, that is, Figure 3 The clean water entering through the middle liquid inlet 5-3 will fall on the high temperature resistant high efficiency filter 6 for particle collection.

[0025] In the utility model, the soot entering from the smoke inlet 1-1 in the chimney 1 passes through three air separation mesh plates 1-5, and the entering soot is divided and broken into a plurality of small bubbles, which are fully contacted with the clean water in the groove 1-3. The water molecules in the clean water can adhere to and adsorb the nitrogen oxide particles in the soot bubbles, that is, the nitrogen oxide particles in the soot are filtered, separated and collected in the clean water in the groove 1-3, and then the clean water in the water tank 5 is slowly transported to the groove 1-3 with the low-speed flow pusher 4, and the nitrogen oxide particles in the soot bubbles are adhered and adsorbed, and with the flow of the clean water, the nitrogen oxide particles flow from the water outlet pipe 3 into the liquid inlet 5-3, and the nitrogen oxide particles are filtered and left on the high-temperature resistant and high-efficiency filter 6, and collected together;

[0026] The present application processes nitrogen oxide particles in a centralized manner, and does not need to add ammonia in real time according to the changes in the nitrogen oxide content in the soot. Instead, ammonia is added periodically according to the amount of collected nitrogen oxide particles, thereby avoiding excessive ammonia input and achieving the purpose of reducing ammonia escape.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for reducing cement denitrification ammonia escape, comprising a chimney (1), It is characterized in that The lower end of the inner cavity of the chimney (1) is connected to a groove (1-3) for containing a denitrifying agent, and the upper end of the groove (1-3) is provided with a baffle (1-4); The lower end of the baffle (1-4) is arranged in the groove (1-3), and a plurality of air-isolating mesh plates (1-5) are arranged in the groove (1-3). The two sides of the air-isolating mesh plates (1-5) are respectively fixedly mounted on the lower end of the baffle (1-4) and the inner wall of the groove (1-3).

2. A device for reducing cement denitrification ammonia escape according to claim 1, It is characterized in that The left side of the inner cavity of the chimney (1) is connected to a smoke inlet (1-1), the right side of the inner cavity of the chimney (1) is connected to a smoke outlet (1-2), and both sides of the lower end of the smoke outlet (1-2) are respectively fixedly bent downwards and connected to a water inlet pipe (2) and a water outlet pipe (3).

3. A device for reducing cement denitrification ammonia escape according to claim 2, It is characterized in that A circulation filtering mechanism is connected between the water inlet pipe (2) and the water outlet pipe (3), and the circulation filtering mechanism comprises a low-speed flow pusher (4) and a water tank (5). One side of the lower end of the water tank (5) is connected to a liquid outlet (5-2), and the liquid outlet (5-2) and the inlet of the low-speed flow pusher (4) are connected to each other.

4. A device for reducing cement denitrification ammonia escape according to claim 3, It is characterized in that The upper end of the water tank (5) is connected with a liquid injection port (5-1) and a liquid inlet (5-3), the liquid inlet (5-3) and the outlet of the water outlet pipe (3) are connected with each other, and the upper end of the liquid injection port (5-1) is provided with an external thread plug (7).

5. A device for reducing cement denitrification ammonia escape according to claim 3, It is characterized in that A high temperature resistant and high efficiency filter (6) is installed in the water tank (5), and a handshake groove (6-1) is arranged on the outer side of the high temperature resistant and high efficiency filter (6).

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