A cement kiln tail staged combustion device for cement production

Abstract

The utility model relates to the field of cement production and processing, and discloses a cement kiln tail staged combustion device for cement production, including a kiln tail smoke chamber, a rotary kiln is arranged on the left end outer wall of the kiln tail smoke chamber, a first one-way valve is arranged on the right end outer wall of the kiln tail smoke chamber, a filter chamber is arranged on the right end of the first one-way valve, a filter frame is inserted into the inner wall of the filter chamber, a rotating rod is elastically connected to the inner wall of the filter frame through a torsion spring, a block is fixedly connected to the right end of the rotating rod, a differential pressure sensor is arranged on the top of the filter chamber, a second one-way valve is arranged on the right end outer wall of the filter chamber, and a spray assembly is arranged on the right end of the second one-way valve. In the utility model, the activated carbon on the filter frame is used to adsorb impurities and harmful substances, and the spray gun sprays the purified air, so that smaller particles mixed with water will not be discharged with the air, thereby improving the effect of filtering the exhaust gas.

Description

Technical Field

[0001] The utility model relates to the field of cement production and processing, in particular to a cement kiln tail staged combustion device for cement production. Background Art

[0002] The cement kiln tail staged combustion device is a key equipment in the cement kiln production process. It is used to treat cement kiln tail gas and achieve efficient combustion. Through reasonable combustion and airflow control, the device decomposes, oxidizes and reduces harmful substances in the kiln tail gas to reduce pollution to the environment.

[0003] In the prior art, a large amount of harmful substances are generated during the combustion process of the existing cement kiln tail staged combustion device. Most of the existing staged combustion devices directly filter and purify a large amount of exhaust gas without batch processing of the exhaust gas, which easily leads to direct discharge of some particulate matter in the exhaust gas and affects the surrounding environment. Therefore, a cement kiln tail staged combustion device for cement production is proposed to solve the above problems. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a cement kiln tail staged combustion device for cement production, aiming to improve the problem that some equipment in the prior art cannot filter and purify the exhaust gas in batches.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a cement kiln tail staged combustion device for cement production, comprising a kiln tail smoke chamber, a rotary kiln is arranged on the left end outer wall of the kiln tail smoke chamber, a first one-way valve is arranged on the right end outer wall of the kiln tail smoke chamber, a filter chamber is arranged on the right end of the first one-way valve, a filter frame is inserted into the inner wall of the filter chamber, a rotating rod is elastically connected to the inner wall of the filter frame through a torsion spring, a clamping block is fixedly connected to the right end of the rotating rod, a differential pressure sensor is arranged on the top of the filter chamber, a second one-way valve is arranged on the right end outer wall of the filter chamber, and a spray assembly is arranged on the right end of the second one-way valve.

[0006] As a further description of the above technical solution:

[0007] The side wall of the kiln tail smoke chamber is penetrated and provided with a metal conduction plate, and the side wall of the kiln tail smoke chamber is fixedly connected with a conduction pipe through a bracket.

[0008] As a further description of the above technical solution:

[0009] The side wall of the kiln tail smoke chamber is fixedly connected to one end of the bracket, and the other end of the bracket is fixedly connected to the bottom end of the conduction pipe.

[0010] As a further description of the above technical solution:

[0011] The spray assembly includes a spray chamber, which is arranged at the right end of the second one-way valve. A spray gun is arranged on the top inner wall of the spray chamber, and a collection bucket is arranged at the bottom end of the spray chamber.

[0012] As a further description of the above technical solution:

[0013] The inner wall of the filter frame is fixedly connected to one end of the torsion spring, and the other end of the torsion spring is fixedly connected to the outer wall of the rotating rod.

[0014] As a further description of the above technical solution:

[0015] The rotating rod is rotatably connected to the inner wall of the filter frame.

[0016] As a further description of the above technical solution:

[0017] The clamping block penetrates and is rotatably connected to the inner wall of the filter frame, and the clamping block is plugged into the inner side wall of the filter chamber.

[0018] As a further description of the above technical solution:

[0019] The right end outer wall of the kiln tail smoke chamber is fixedly connected to the filter chamber and the spray chamber respectively.

[0020] The utility model has the following beneficial effects:

[0021] 1. In the utility model, the waste gas flow in the filter chamber is monitored by a differential pressure sensor, and the first one-way valve is opened or closed, so that the air in the kiln tail smoke chamber can be filtered in batches, which can ensure that the treatment equipment can effectively treat each batch of waste gas to avoid exceeding the equipment load range, and use the activated carbon on the filter frame to adsorb impurities and harmful substances, and the spray gun to spray the purified air, so that smaller particles mixed with water will not be discharged with the air, thereby improving the filtering effect of the waste gas.

[0022] 2. In the utility model, the heat of the exhaust gas in the kiln tail smoke chamber is transferred to the conduction pipe through the metal conduction plate, so that the liquid or gas in the conduction pipe absorbs the heat energy for utilization, thereby preventing the waste of the exhaust gas heat resources, reducing the emission of greenhouse gases, and improving the energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional schematic diagram of the overall structure of a kiln tail smoke chamber and a rotary kiln of a cement kiln tail graded combustion device for cement production proposed by the utility model;

[0024] Figure 2 This is an exploded schematic diagram of a filter chamber and a filter frame of a cement kiln tail staged combustion device for cement production proposed by the utility model;

[0025] Figure 3 This is a schematic cross-sectional view of the entirety of a filter frame of a cement kiln tail staged combustion device for cement production proposed by the utility model;

[0026] Figure 4 The utility model provides an overall cross-sectional schematic diagram of a spray chamber of a cement kiln tail staged combustion device for cement production.

[0027] Legend:

[0028] 1. Kiln tail smoke chamber; 2. Rotary kiln; 3. First one-way valve; 4. Filter chamber; 5. Filter frame; 6. Torsion spring; 7. Rotating rod; 8. Block; 9. Differential pressure sensor; 10. Second one-way valve; 11. Spray chamber; 12. Spray gun; 13. Collection barrel; 14. Metal conduction plate; 15. Bracket; 16. Conducting pipe. DETAILED DESCRIPTION

[0029] 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.

[0030] Reference Figure 1-Figure 3, the utility model provides an embodiment: a cement kiln tail staged combustion device for cement production, comprising a kiln tail smoke chamber 1, the kiln tail smoke chamber 1 can cooperate with the rotary kiln 2 for calcination treatment, so that the exhaust gas from the rotary kiln 2 enters the kiln tail smoke chamber 1 for collection, the left end outer wall of the kiln tail smoke chamber 1 is provided with a rotary kiln 2, under high temperature conditions, the rotary kiln 2 can pyrolyze, oxidize and reduce solid waste, and convert the waste into ash, charcoal, gas and other harmless substances, the right end outer wall of the kiln tail smoke chamber 1 is provided with a first one-way valve 3, the opening and closing of the first one-way valve 3 can be controlled by an external device, the right end of the first one-way valve 3 is provided with a filter chamber 4, the filter chamber 4 and the kiln tail smoke chamber 1 are communicated through the first one-way valve 3, so that the exhaust gas can enter the filter chamber 4, the inner wall of the filter chamber 4 is plugged with a filter frame 5, and the filter frame 5 is provided with activated carbon, the activated carbon has a porous structure and a large surface area, and the activated carbon can adsorb and To remove impurities, organic matter, color and odor in gases, solutions and vapors, the inner wall of the filter frame 5 is elastically connected to a rotating rod 7 through a torsion spring 6. The torsion spring 6 of the filter frame 5 is provided with a slot, which allows enough space for the torsion spring 6 to be compressed. A clamping block 8 is fixedly connected to the right end of the rotating rod 7. The inner wall of the filter frame 5 is provided with an operation for rotating the clamping block 8, which allows the clamping block 8 to rotate along the inner wall. A differential pressure sensor 9 is provided at the top of the filter chamber 4. The differential pressure sensor 9 can measure the pressure difference in the filter chamber 4, and estimate the flow rate of the exhaust gas according to the change of the differential pressure, and control the start and end of the batch treatment of the exhaust gas according to the preset differential pressure range. When the exhaust gas flow rate of the filter chamber 4 reaches the upper limit, the staff is reminded to close or open the first one-way valve 3, and open or close the second one-way valve 10 respectively. The right end outer wall of the filter chamber 4 is provided with a second one-way valve 10, and the right end of the second one-way valve 10 is provided with a spray assembly.

[0031] Reference Figure 1 The side wall of the kiln tail smoke chamber 1 is penetrated and provided with a metal conduction plate 14. The metal conduction plate 14 can transfer the heat in the exhaust gas in the kiln tail smoke chamber 1 to the conduction pipe 16, so that the heat of the exhaust gas to be treated can be recovered and utilized. The side wall of the kiln tail smoke chamber 1 is fixedly connected with the conduction pipe 16 through a bracket 15. The side wall of the kiln tail smoke chamber 1 is fixedly connected to one end of the bracket 15. The entire conduction pipe 16 is supported by the bracket 15, and the conduction pipe 16 can receive heat energy transfer through liquid or gas. The other end of the bracket 15 is fixedly connected to the bottom end of the conduction pipe 16.

[0032] Reference Figure 1 and Figure 4The spray assembly includes a spray chamber 11, which is arranged at the right end of the second one-way valve 10. A spray gun 12 is arranged on the inner wall of the top of the spray chamber 11. The spray gun 12 sprays in a mist form, and the water mist can mix the smaller particles in the purified air and flow into the collection bucket 13. The bottom end of the spray chamber 11 is provided with a collection bucket 13. The collection bucket 13 can allow the collected water to precipitate and is connected to the spray gun 12 through an external pipe so that the collected water can be recycled.

[0033] Reference Figure 1-Figure 3 The inner wall of the filter frame 5 is fixedly connected to one end of the torsion spring 6, and the other end of the torsion spring 6 is fixedly connected to the outer wall of the rotating rod 7. When the rotating rod 7 rotates, the torsion spring 6 will be compressed. At this time, the torsion spring 6 is in the initial state. When resetting, the elastic force of the torsion spring 6 is used to reset the rotating rod 7. The rotating rod 7 is rotatably connected to the inner wall of the filter frame 5. The block 8 penetrates and is rotatably connected to the inner wall of the filter frame 5. The block 8 is plugged into the inner side wall of the filter chamber 4. A slot is provided at the insertion point of the filter frame 5 of the filter chamber 4, which can allow the block 8 to be plugged into it to limit the filter frame 5. The outer wall of the right end of the kiln tail smoke chamber 1 is fixedly connected to the filter chamber 4 and the spray chamber 11 respectively.

[0034] Working principle: First, the calcination process of the rotary kiln 2 will generate a large amount of waste gas. The waste gas generated by the rotary kiln 2 will be sucked into the kiln tail smoke chamber 1 for storage through the existing method. The high-calorie waste gas in the kiln tail smoke chamber 1 will be transferred to the liquid or gas in the conduction pipe 16 through the metal conduction plate 14, which is convenient for the collection and utilization of heat energy. When the waste gas needs to be filtered, it is only necessary to start the first one-way valve 3 to let the waste gas in the kiln tail smoke chamber 1 enter the filter chamber 4. Since the volume of the filter chamber 4 is constant, the differential pressure sensor 9 is used to detect the flow of the waste gas in the filter chamber 4. When a certain flow is reached, the staff is reminded to close the first one-way valve 3. , the activated carbon on the filter frame 5 in the filter chamber 4 adsorbs harmful substances, impurities and particulate matter in the exhaust gas to avoid the discharge affecting the surrounding environment. After the filtration is completed, the spray gun 12 is opened in advance to allow the spray gun 12 to spray in the form of water mist. At this time, the second one-way valve 10 is opened to allow the filtered air in the filter chamber 4 to pass through the spray chamber 11, and the smaller particles in the air are mixed with the water mist and flow into the collection barrel 13 for collection. Finally, the air is discharged from the top of the spray chamber 11. When the purified air in the filter chamber 4 is discharged, the second one-way valve 10 is closed. When purifying again, follow the above purification operation steps.

[0035] When it is necessary to replace the activated carbon on the filter frame 5, it is only necessary to rotate the rotating rod 7 clockwise to let the rotating rod 7 carry the card block 8 ninety degrees. At this time, the torsion spring 6 is in a compressed state, allowing the card block 8 to overlap with the inner wall of the filter frame 5 in a vertical state, allowing the card block 8 to separate from the inner side wall groove of the filter chamber 4, releasing the limit of the entire filter frame 5, and then moving the filter frame 5 outward by the rotating rod 7. When it is necessary to install the filter frame 5, it is only necessary to let the card block 8 overlap with the inner wall of the filter frame 5 in a vertical state, and then insert the filter frame 5 into the filter chamber 4. When the card block 8 overlaps with the inner side wall groove of the filter chamber 4, release the rotating rod 7 and use the reverse elastic force of the torsion spring 6 to bring the card block 8 to reset counterclockwise, so that the card block 8 is stuck in the inner side wall groove of the filter chamber 4.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cement kiln tail staged combustion device for cement production, comprising a kiln tail smoke chamber (1), characterized in that: A rotary kiln (2) is arranged on the left outer wall of the kiln tail smoke chamber (1), a first one-way valve (3) is arranged on the right outer wall of the kiln tail smoke chamber (1), a filter chamber (4) is arranged on the right end of the first one-way valve (3), a filter frame (5) is inserted into the inner wall of the filter chamber (4), a rotating rod (7) is elastically connected to the inner wall of the filter frame (5) via a torsion spring (6), a clamping block (8) is fixedly connected to the right end of the rotating rod (7), a differential pressure sensor (9) is arranged on the top end of the filter chamber (4), a second one-way valve (10) is arranged on the right outer wall of the filter chamber (4), and a spray assembly is arranged on the right end of the second one-way valve (10).

2. The cement kiln tail staged combustion device for cement production according to claim 1, characterized in that: A metal conduction plate (14) is penetrated through and provided on the side wall of the kiln tail smoke chamber (1), and a conduction pipe (16) is fixedly connected to the side wall of the kiln tail smoke chamber (1) via a bracket (15).

3. The cement kiln tail staged combustion device for cement production according to claim 2, characterized in that: The side wall of the kiln tail smoke chamber (1) is fixedly connected to one end of a bracket (15), and the other end of the bracket (15) is fixedly connected to the bottom end of the conduction pipe (16).

4. The cement kiln tail staged combustion device for cement production according to claim 1, characterized in that: The spray assembly comprises a spray chamber (11), the spray chamber (11) being arranged at the right end of the second one-way valve (10), a spray gun (12) being arranged on the inner wall of the top end of the spray chamber (11), and a collection bucket (13) being arranged at the bottom end of the spray chamber (11).

5. The cement kiln tail staged combustion device for cement production according to claim 1, characterized in that: The inner wall of the filter frame (5) is fixedly connected to one end of a torsion spring (6), and the other end of the torsion spring (6) is fixedly connected to the outer wall of the rotating rod (7).

6. The cement kiln tail staged combustion device for cement production according to claim 1, characterized in that: The rotating rod (7) is rotatably connected to the inner wall of the filter frame (5).

7. The cement kiln tail staged combustion device for cement production according to claim 1, characterized in that: The clamping block (8) penetrates and is rotatably connected to the inner wall of the filter frame (5), and the clamping block (8) is plugged into the inner side wall of the filter chamber (4).

8. The cement kiln tail staged combustion device for cement production according to claim 1, characterized in that: The right end outer wall of the kiln tail smoke chamber (1) is fixedly connected to the filter chamber (4) and the spray chamber (11) respectively.

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