Lime kiln dust removal system

Abstract

The utility model relates to the technical field of lime kiln dust removal, in particular to a lime kiln dust removal system which comprises a lime kiln, an exhaust pipe is fixedly connected to the top end of the lime kiln, a one-way valve is fixedly connected to the end, away from the lime kiln, of the exhaust pipe, and a connecting pipe is fixedly connected to the other side of the one-way valve. The top end of the connecting pipe is fixedly connected with an inclined air inlet pipe, the top end of the air inlet pipe is fixedly connected with an air inlet box, the top end in the air inlet box is fixedly connected with a fan, the outer side of the air inlet box is fixedly connected with an air supply pipe, the outer side of the lime kiln is fixedly connected with a lower tank, and the top end of the lower tank is in threaded connection with an upper tank. Through the arrangement of the filtering device, the connecting pipe, the communicating pipe, the connecting bent pipe and other components, waste gas discharged out of the lime kiln can be filtered, lime powder contained in the waste gas is filtered out, and the waste gas is prevented from being discharged into the atmosphere.

Description

Technical Field

[0001] The utility model relates to the technical field of lime kiln dust removal, in particular to a lime kiln dust removal system. Background Art

[0002] A lime kiln is a process where limestone and fuel are loaded into the kiln, the limestone is calcined by burning the fuel, and after cooling, the limestone is unloaded from the kiln, completing the production of lime products. There are many fuels for burning lime, including solid fuel, gas fuel and liquid fuel. The most commonly used fuel is coke, which is cheap, easy to purchase and store, making it the main fuel for lime plants.

[0003] In the process of producing lime in a lime kiln, due to the use of coke and the air supply system providing wind in the lime kiln, part of the produced lime will be mixed in the exhaust gas and discharged from the lime kiln in the form of dust, which reduces the output of lime and is not conducive to the surrounding environment. Secondly, when the exhaust gas is discharged from the kiln, the temperature is relatively high, and it may cause damage to the filter device when passing through the filter device. Finally, the filter device cannot easily replace the filter screen. After filtering the lime for a period of time, the filter screen needs to be cleaned to avoid the accumulation of lime powder on one side of the filter screen, and the filtered lime powder needs to be collected. Therefore, a lime kiln dust removal system is proposed to address the above problems. Utility Model Content

[0004] The utility model aims to provide a lime kiln dust removal system to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A lime kiln dust removal system comprises a lime kiln, wherein the top of the lime kiln is fixedly connected with an exhaust pipe, one end of the exhaust pipe away from the lime kiln is fixedly connected with a one-way valve, the other side of the one-way valve is fixedly connected with a connecting pipe, the top of the connecting pipe is fixedly connected with an inclined air intake pipe, the top of the intake pipe is fixedly connected with an air intake box, the top of the air intake box is fixedly connected with a fan, the outside of the air intake box is fixedly connected with an air supply pipe, the outside of the lime kiln is fixedly connected with a lower tank, the top of the lower tank is threadedly connected with an upper tank, the top of the upper tank is threadedly connected with an L-shaped connecting elbow, the lower tank is threadedly connected with a conical filter, the bottom of the lower tank is provided with a dust outlet, the dust outlet is threadedly connected with a dust collecting box, the end of the connecting elbow away from the upper tank is threadedly connected with a connecting pipe, the other top of the upper tank is fixedly connected with a discharge pipe, and the top of the discharge pipe is fixedly connected with a rainproof cover.

[0007] Preferably, the number of the lower tank and the number of the upper tank are both two, and one lower tank and one upper tank form a group, which are arranged up and down on the outside of the lime kiln.

[0008] Preferably, one end of the connecting pipe away from the one-way valve is threadedly connected to the connecting elbow outside the lower tank.

[0009] Preferably, the number of the connecting elbows is three, two of which are respectively arranged on the outside of the upper filter device, and the other is arranged on the outside of the lower tank of the lower filter device.

[0010] Preferably, there are two dust collection boxes.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. In the utility model, the waste gas discharged from the lime kiln can be filtered by the provided filtering device and the connecting pipe, the connecting pipe, the connecting elbow and other components, and the lime powder contained in the waste gas can be filtered down to avoid being discharged into the atmosphere;

[0013] 2. In the utility model, the exhaust gas can be cooled by the connecting pipe, air inlet box, fan and air supply pipe. The fan draws the external air into the connecting pipe, and the low-temperature external air is mixed with the high-temperature exhaust gas, which can reduce the temperature of the exhaust gas. In addition, the inlet of the air supply pipe is equipped with a filter to filter the debris in the external air.

[0014] 3. In the utility model, the exhaust gas can be filtered by arranging the lower tank, the upper tank, the conical filter, the dust outlet and the dust collecting box. After the conical filter has been used for a period of time, the lower tank and the upper tank can be separated, and the conical filter can be taken out for cleaning or replacement. In addition, the lime powder filtered by the conical filter during use will fall into the dust collecting box through the dust outlet, thereby recycling the lime powder in the exhaust gas and reducing the loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a half-section schematic diagram of the structure of the filter device of the utility model;

[0017] Figure 3 It is a half-section schematic diagram of the air intake box structure of the utility model.

[0018] In the figure: 1. Lime kiln; 2. Exhaust pipe; 3. One-way valve; 4. Connecting pipe; 5. Inlet pipe; 6. Inlet box; 7. Air supply pipe; 8. Lower tank; 9. Upper tank; 10. Connecting elbow; 11. Conical filter; 12. Dust outlet; 13. Dust collection box; 14. Connecting pipe; 15. Discharge pipe; 16. Rain cover; 17. Fan. DETAILED DESCRIPTION

[0019] 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.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0021] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0022] See also Figure 1-3 , the utility model provides a technical solution:

[0023] A lime kiln dust removal system comprises a lime kiln 1, wherein an exhaust pipe 2 is fixedly connected to the top of the lime kiln 1, a one-way valve 3 is fixedly connected to one end of the exhaust pipe 2 away from the lime kiln 1, a connecting pipe 4 is fixedly connected to the other side of the one-way valve 3, an inlet pipe 5 arranged obliquely is fixedly connected to the top of the connecting pipe 4, an air inlet box 6 is fixedly connected to the top of the air inlet pipe 5, a fan 17 is fixedly connected to the top of the air inlet box 6, an air supply pipe 7 is fixedly connected to the outside of the air inlet box 6, a lower tank 8 is fixedly connected to the outside of the lime kiln 1, an upper tank 9 is threadedly connected to the top of the lower tank 8, an L-shaped connecting elbow 10 is threadedly connected to the top of the upper tank 9, a conical filter 11 is threadedly connected to the inside of the lower tank 8, a dust outlet 12 is provided at the bottom of the lower tank 8, a dust collecting box 13 is threadedly connected to the inside of the dust outlet 12, a connecting pipe 14 is threadedly connected to one end of the connecting elbow 10 away from the upper tank 9, a discharge pipe 15 is fixedly connected to the top of the other upper tank 9, and a rainproof cover 16 is fixedly connected to the top of the discharge pipe 15.

[0024] There are two lower tanks 8 and two upper tanks 9, one lower tank 8 and one upper tank 9 form a group, and are arranged up and down on the outside of the lime kiln 1; the end of the connecting pipe 4 away from the one-way valve 3 is threadedly connected to the connecting elbow 10 on the outside of the lower tank 8; there are three connecting elbows 10, two connecting elbows 10 are respectively arranged on the outside of the upper filtering device, and the other is arranged on the outside of the lower tank 8 of the lower filtering device; there are two dust collecting boxes 13.

[0025] Working process: When the device is used, the external power supply provides power to the electrical equipment of the device. There is an exhaust pipe 2 at the top of the lime kiln 1. The one-way valve 3 is arranged between the exhaust pipe 2 and the connecting pipe 4 to prevent the exhaust gas in the lime kiln 1 from returning to the kiln. There is an air supply cooling device at the top of the connecting pipe 4. The air intake pipe 5 is fixed at the top of the connecting pipe 4. The air intake box 6 is fixed at the top of the air intake pipe 5. The fan 17 is arranged inside the air intake box 6. The air supply pipe 7 is fixed on the outside of the air intake box 6. There are two sets of filtering devices with the same structure on the outside of the lime kiln 1 to filter the exhausted exhaust gas. The end of the connecting pipe 4 is connected to the lower tank 8 of a group of filtering devices through a connecting elbow 10. The top of the upper tank 9 is connected with a connecting elbow 10 and a connecting pipe 14. The end of the connecting pipe 14 is connected to the lower tank 8 of the second group of filtering devices. There is a conical filter 11 inside the filtering device. When it is necessary to process the exhausted exhaust gas, the fan 17 is started first, and the external air enters the inside of the air intake box 6 through the air supply pipe 7, and then enters the connecting pipe 4 through the air intake pipe 5. The one-way valve 3 at one end of the connecting pipe 4 can prevent the exhaust gas and the external air entering the connecting pipe 4 from entering the stone In the lime kiln 1, in the connecting pipe 4, the exhaust gas is cooled by the outside air and then enters the first group of filtering devices. The exhaust gas enters from the bottom of the conical filter 11. After filtering by the conical filter 11, part of the lime powder contained in the exhaust gas can be filtered down. The filtered lime powder will enter the dust collecting box 13 through the dust outlet 12 to form the recovery of lime powder. The filtered exhaust gas enters the connecting pipe 14 from the connecting elbow 10 at the top of the upper tank 9, and enters the lower tank 8 of the second group of filtering devices through the connecting pipe 14. The exhaust gas passes through the second group of filtering devices. After filtration, it is discharged from the discharge pipe 15 at the top of the upper tank 9 and enters the air. The conical filter 11 in the second group of filtering devices can perform secondary filtration on the exhaust gas to remove the lime powder that is not completely filtered out. There is a rain cover 16 at the top of the discharge pipe 15 to prevent rainwater from entering the filtering device and affecting the operation of the filtering device. When it is necessary to clean or replace the conical filter 11, all the pipelines outside the filtering device are removed, and the lower tank 8 and the upper tank 9 are separated. The conical filter 11 can be taken out from the lower tank 8 and can be cleaned, repaired or replaced.

[0026] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The standard parts used in this utility model can be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt the conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lime kiln dust removal system, comprising a lime kiln (1), characterized in that: The top of the lime kiln (1) is fixedly connected to an exhaust pipe (2); one end of the exhaust pipe (2) away from the lime kiln (1) is fixedly connected to a one-way valve (3); the other side of the one-way valve (3) is fixedly connected to a connecting pipe (4); the top of the connecting pipe (4) is fixedly connected to an air intake pipe (5) arranged obliquely; the top of the air intake pipe (5) is fixedly connected to an air intake box (6); the top of the air intake box (6) is fixedly connected to a fan (17); the outside of the air intake box (6) is fixedly connected to an air supply pipe (7); the outside of the lime kiln (1) is fixedly connected to a lower tank (8); The top end of the lower tank (8) is threadedly connected to the upper tank (9), the top end of the upper tank (9) is threadedly connected to an L-shaped connecting elbow (10), the lower tank (8) is internally threadedly connected to a conical filter (11), the bottom end of the lower tank (8) is provided with a dust outlet (12), the dust outlet (12) is internally threadedly connected to a dust collecting box (13), one end of the connecting elbow (10) away from the upper tank (9) is threadedly connected to a connecting pipe (14), the other top end of the upper tank (9) is fixedly connected to a discharge pipe (15), the top end of the discharge pipe (15) is fixedly connected to a rainproof cover (16).

2. A lime kiln dust removal system according to claim 1, characterized in that: The number of the lower tank (8) and the number of the upper tank (9) are both two, and one lower tank (8) and one upper tank (9) form a group, which are arranged up and down on the outer side of the lime kiln (1).

3. A lime kiln dust removal system according to claim 1, characterized in that: One end of the connecting pipe (4) away from the one-way valve (3) is threadedly connected to a connecting elbow (10) outside the lower tank (8).

4. A lime kiln dust removal system according to claim 1, characterized in that: The number of the connecting elbows (10) is three, two of which are arranged on the outside of the upper filtering device, and the other is arranged on the outside of the lower tank (8) of the lower filtering device.

5. A lime kiln dust removal system according to claim 1, characterized in that: The number of the dust collecting boxes (13) is two.

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