Chloride ash removal device for cement kiln

Abstract

The utility model discloses a cement kiln removes chlorine ash path control ash removal device, including steel sheet storehouse, three -way valve, steel sheet storehouse is connected with ash pipe, the ash pipe has communicated grate cooler, the grate cooler has communicated clinker storehouse, three -way valve is connected with ash pipe, three -way valve is connected with belt dust collection hopper, belt dust collection hopper is connected with filter bag dust collector, through three -way valve changes the flow of chlorine ash, when producing high -strength cement, chlorine ash is sent into belt dust collection hopper, separates gas and chlorine ash, and can solve chlorine ash dust problem with filter bag dust collector, and cement production is more environmental protection, prevents chlorine ash and mixes into high -strength cement, guarantees the quality of high -strength cement, when producing ordinary cement, three -way valve guides chlorine ash mixed cement, realizes the reuse of chlorine ash.

Description

Technical Field

[0001] This utility model relates to the field of cement production technology, specifically to a cement kiln dechlorination ash distribution control device. Background Technology

[0002] In the cement production process, when various solid and hazardous wastes or combustible wastes are used as alternative fuels, a certain amount of chlorine will inevitably be introduced into the rotary kiln system. After passing through the rotary kiln system, this chlorine will undergo high-temperature volatilization and low-temperature condensation reactions, eventually resulting in enrichment and altering the atmosphere of the kiln system. In severe cases, it can lead to crusting and blockage within the rotary kiln system, interfering with the entire thermal regime and affecting the normal operation of the cement kiln system. At the same time, a large amount of chlorine and other elements will also be solidified into the clinker, thereby affecting the quality of the cement clinker. Therefore, it is necessary to perform dechlorination treatment on the rotary kiln system.

[0003] In related technologies, most employ dechlorination systems to reduce the chloride ion content in particles, further decreasing the amount of chloride ions returned to the kiln system. While dechlorination systems reduce the concentration of sulfur, alkali, and chloride enrichment and circulation within the kiln, and decrease the sulfur, alkali, and chloride content carried out of the clinker, which is beneficial for the production of high-strength cement clinker, the dechlorination system quantitatively discharges dechlorinated ash through a feeder and rotor scale. This ash is then discharged via a spiral solid pump and directly blown to the grate cooler by a Roots blower through the ash discharge pipe. Combined with the clinker exiting the kiln, it is transported to the clinker silo via a roller crusher and inclined conveyor. The relatively high sulfur, chlorine, and alkali content in the dechlorinated ash is then mixed into the clinker silo, which is detrimental to the production of high-strength cement clinker. Utility Model Content

[0004] The purpose of this invention is to provide a cement kiln dechlorination ash distribution control device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cement kiln dechlorination ash distribution control device, including a steel silo, the steel silo being connected to an ash pipe, the ash pipe being connected to a grate cooler, the grate cooler being connected to a clinker silo, the steel silo temporarily storing dechlorination ash, which can be conveniently and promptly used when needed;

[0006] A three-way valve is connected to an ash pipe, and the three-way valve is connected to a belt dust collector hopper, which is connected to a filter bag dust collector.

[0007] The ash pipe is used to transport dechlorinated ash. The three-way valve changes the transport path of the dechlorinated ash according to the quality of cement. When producing high-strength cement clinker, it can prevent dechlorinated ash from mixing into the cement clinker and reduce impurities in the cement clinker.

[0008] Furthermore, a bucket elevator is installed on the side of the steel silo. The inlet of the bucket elevator is connected to a zipper machine, and the inlet of the zipper machine is connected to a gas-box pulse bag dust collector and a gas cooler. The gas cooler is connected to the gas-box pulse bag dust collector. The dechlorinated ash in the gas cooler and the gas-box pulse bag dust collector is automatically fed into the steel silo through the zipper machine and the bucket elevator, which facilitates centralized storage of the dechlorinated ash.

[0009] Furthermore, the air-box type pulse bag dust collector is connected to an exhaust fan, which is connected to a decomposition furnace. The gas discharged by the exhaust fan is temperature-controlled and reused.

[0010] Furthermore, the decomposition furnace is connected to a cyclone separator, which is connected to a gas cooler. A portion of the dust with low levels of harmful components is collected by the cyclone separator and then reintroduced into the decomposition furnace, while another portion of the flue gas with high chlorine and alkali content enters the cooler for rapid cooling.

[0011] Furthermore, the decomposition furnace is connected to a blower, which provides high-pressure air supply and pneumatic conveying to the decomposition furnace.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: By changing the flow direction of dechlorination ash through a three-way valve, when producing high-strength cement, the dechlorination ash is fed into the belt dust collector hopper to separate the gas and dechlorination ash. Combined with a filter bag dust collector, the problem of dechlorination ash dust can be solved, making cement production more environmentally friendly, preventing dechlorination ash from mixing into high-strength cement, and ensuring the quality of high-strength cement; when producing ordinary cement, the three-way valve guides the dechlorination ash to mix with the cement, realizing the reuse of dechlorination ash. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the dechlorination ash separation control principle of this utility model.

[0014] In the diagram: 1. Decomposition furnace; 2. Cyclone separator; 3. Gas cooler; 4. Blower; 5. Pulse jet bag dust collector; 6. Zipper conveyor; 7. Bucket elevator; 8. Steel silo; 9. Three-way valve; 10. Grate cooler; 11. Clinker silo; 12. Belt conveyor dust collector hopper; 13. Bag filter dust collector; 14. Ash pipe; 15. Exhaust fan. Detailed Implementation

[0015] 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.

[0016] Example:

[0017] Please see Figure 1 This utility model provides a technical solution: a cement kiln dechlorination ash distribution control device, including a steel silo 8, the steel silo 8 is connected to an ash pipe 14, the ash pipe 14 is connected to a grate cooler 10, the grate cooler 10 is connected to a clinker silo 11, the clinker silo 11 stores cement clinker, and the steel silo 8 centrally stores the dechlorination ash from each route, which facilitates the centralized utilization of the dechlorination ash;

[0018] A three-way valve 9 is connected to an ash pipe 14. The three-way valve 9 is connected to a belt dust collector 12. The belt dust collector 12 is connected to a filter bag dust collector 13. When the clinker silo 11 discharges cement clinker through the belt conveyor, the belt dust collector 12 can prevent cement clinker from generating dust and reduce dust pollution. The filter bag dust collector 13 can collect cement clinker for reuse and reduce waste.

[0019] The ash pipe 14 is used to transport dechlorinated ash. The three-way valve 9 changes the transport path of the dechlorinated ash according to the cement quality. When producing ordinary cement, the dechlorinated ash is mixed with the cement. When producing high-strength cement, the dechlorinated ash is separated from the cement.

[0020] In this embodiment, a bucket elevator 7 is installed on the side of the steel silo 8. A zipper 6 is connected to the inlet of the bucket elevator 7. The zipper 6 operates at low speed to avoid dust generation from the dechlorination ash and ensure continuous and stable feeding. Both the zipper 6 and the elevator adopt a sealed design to prevent dust from overflowing and meet environmental protection requirements.

[0021] In this embodiment, the inlet of the zipper machine 6 is connected to a gas box type pulse bag dust collector 5 and a gas cooler 3. The gas cooler 3 is connected to the gas box type pulse bag dust collector 5. The gas cooler 3 first cools down the gas to avoid high temperature directly impacting the filter bag and extend the filter bag life.

[0022] In this embodiment, the air-box type pulse bag dust collector 5 is connected to an exhaust fan 15, which is connected to a decomposition furnace 1. The gas discharged from the air-box type pulse bag dust collector 5 is reused after temperature adjustment.

[0023] In this embodiment, the decomposition furnace 1 is connected to a cyclone separator 2, which is connected to a gas cooler 3. The flue gas discharged from the decomposition furnace 1 is cooled and sent to the cyclone separator 2 for coarse collection. A portion of the dust with low content of harmful components is collected by the cyclone separator 2 and then re-enters the decomposition furnace 1, while another portion of the flue gas with high chlorine and alkali content enters the gas cooler 3.

[0024] In this embodiment, the decomposition furnace 1 is connected to a blower 4, which provides the necessary airflow to the decomposition furnace 1 and maintains the furnace temperature, thereby ensuring the decomposition efficiency of the raw materials.

[0025] Specifically, during use, a certain amount of high-temperature flue gas (containing high levels of harmful components such as alkali, sulfur, and chlorine) is drawn from the kiln tail flue of the decomposition furnace 1 by the exhaust fan 15 in conjunction with a high-temperature extraction probe. The flue gas is then thoroughly mixed with cold air, and the cooled flue gas is sent to the cyclone separator 2 for coarse collection. A portion of the dust with low levels of harmful components is collected by the cyclone separator 2 and returned to the decomposition furnace 1, while the other portion of the flue gas with high levels of chlorine and alkali enters the gas cooler 3 for rapid cooling, thereby achieving the separation of chlorine, alkali, and other elements from the dust.

[0026] Gas cooler 3 cools the flue gas. The cooled dechlorinated ash is sent into steel silo 8 through zipper 6 and bucket elevator 7. The cooled flue gas enters air box type pulse bag dust collector 5 through pipeline for dust removal. The dust removed flue gas enters deodorizing fan pipeline through induced draft fan. The dechlorinated ash collected by air box type pulse bag dust collector 5 is sent into steel silo 8 through zipper 6 and bucket elevator 7.

[0027] The dechlorinated ash in the steel silo 8 is discharged through a feeder, a rotor scale, and a spiral solid pump. Then, the dechlorinated ash is sent into the ash pipe 14 by a Roots blower. When producing ordinary cement, the three-way valve 9 controls the dechlorinated ash to be sent to the first position of the grate cooler 10. It is then transported to the clinker silo 11 by the roller crusher and the inclined chain, in combination with the clinker discharged from the kiln. This realizes the utilization of the dechlorinated ash.

[0028] When producing high-strength cement, the three-way valve 9 controls the dechlorination ash to be sent to the belt dust collector hopper 12. The dust is then collected by the filter bag dust collector 13 to solve the dust problem in the belt dust collector hopper 12, preventing the dechlorination ash from entering the cement and ensuring better quality of high-strength cement.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cement kiln dechlorination ash distribution control device, characterized in that, include: A steel silo (8) is connected to a ash pipe (14), which is connected to a grate cooler (10), which is connected to a clinker silo (11). A three-way valve (9) is connected to a dust pipe (14). The three-way valve (9) is connected to a belt dust collector hopper (12). The belt dust collector hopper (12) is connected to a filter bag dust collector (13). The ash pipe (14) is used to transport dechlorinated ash, and the three-way valve (9) changes the transport path of the dechlorinated ash according to the cement quality.

2. The cement kiln dechlorination ash distribution control device according to claim 1, characterized in that: A bucket elevator (7) is installed on the side of the steel silo (8), and a zipper machine (6) is connected to the inlet of the bucket elevator (7).

3. The cement kiln dechlorination ash distribution control device according to claim 2, characterized in that: The inlet of the zipper machine (6) is connected to a gas box type pulse bag dust collector (5) and a gas cooler (3), and the gas cooler (3) is connected to the gas box type pulse bag dust collector (5).

4. The cement kiln dechlorination ash distribution control device according to claim 3, characterized in that: The air-box type pulse bag dust collector (5) is connected to an exhaust fan (15), and the exhaust fan (15) is connected to a decomposition furnace (1).

5. The cement kiln dechlorination ash distribution control device according to claim 4, characterized in that: The decomposition furnace (1) is connected to a cyclone separator (2), which is connected to a gas cooler (3).

6. The cement kiln dechlorination ash distribution control device according to claim 4, characterized in that: The decomposition furnace (1) is connected to a blower (4).

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