Dust removal device for kiln

Abstract

The utility model discloses a kiln dust removal device in the technical field of industrial waste gas treatment, which comprises a primary dust removal box, the top of the primary dust removal box is provided with a trumpet-shaped air inlet, the air inlet extends into the primary dust removal box, the bottom of the primary dust removal box is provided with a dust collection port, and the side wall of the primary dust removal box is provided with an air outlet. The air outlet is communicated with a second-stage dust removal box, a sludge discharge port is formed in the bottom of the second-stage dust removal box, a baffle is arranged in the second-stage dust removal box, an air passing port which is gradually reduced is formed in the bottom of the baffle, a spraying piece is arranged on the side, away from the air outlet, of the baffle, and an exhaust port is formed in the top of the second-stage dust removal box. According to the device in the scheme, during lime production, large-particle dust can be filtered firstly, and then wet dust removal is performed, so that the wet dust removal device can be prevented from being blocked by a large amount of large-particle dust.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial waste gas treatment technical field, especially a kiln dust removal device. BACKGROUND

[0002] In modern industrial production, especially in the building material and chemical industry, kiln is an indispensable important equipment. However, kiln will produce a large amount of dust and other pollutants in the running process, and these substances will cause serious influence on air quality if directly discharged into the atmospheric environment, and may cause a series of environmental problems. Therefore, in order to solve this problem, various forms of kiln dust removal device emerge as the times require.

[0003] The traditional kiln dust removal method mainly includes mechanical dust removal (such as cyclone separator), wet scrubber, electrostatic precipitator and bag filter etc. These methods have their own advantages in dust removal, and in lime production, wet scrubber is often used for dust removal, but due to the large amount of dust in lime and the large particle dust, direct use of wet scrubber for dust removal is easy to cause the dust removal device to be blocked, and further affect the dust removal effect. UTILITY MODEL CONTENTS

[0004] The utility model intends to provide a kiln dust removal device, to solve the problem of easy to block due to the large amount of dust and the large amount of large particle dust produced in the process when the existing dust removal device is directly applied in lime production.

[0005] The kiln dust removal device in the scheme, including the first dust removal box, the top of the first dust removal box is equipped with the flared gas inlet, the gas inlet extends to the inside of the first dust removal box, the bottom of the first dust removal box is equipped with the dust collection port, the sidewall of the first dust removal box is equipped with the gas outlet, the gas outlet is connected with the second dust removal box, the bottom of the second dust removal box is equipped with the sludge discharge port, the second dust removal box is equipped with the baffle, the bottom of the baffle is equipped with the gradually reduced air outlet, the side of the baffle away from the gas outlet is equipped with the spray part, the top of the second dust removal box is equipped with the exhaust port.

[0006] The working principle and beneficial effects of this solution are as follows: During use, dust-laden gas is introduced into the inlet. After entering the inlet, large dust particles fall to the bottom of the primary dust collector. Utilizing the inertia of the dust particles, they separate from the airflow when the gas flow direction changes abruptly. Large dust particles remain directly at the bottom of the primary dust collector, accumulating at the dust collection port. Small dust particles remain in the gas and, along with the gas, bypass the funnel-shaped inlet and enter the secondary dust collector through the outlet. The baffles inside the secondary dust collector block the gas, causing it to sink and enter the side of the baffle furthest from the outlet through the air passages. The dust-laden gas comes into full contact with the water mist formed by the spray system. When the dust particles collide, adsorb, and agglomerate with the liquid droplets, they settle together with the liquid, forming a muddy, wet ash. The purified gas is then discharged through the exhaust port. This solution divides the dust collection box into two stages. Large dust particles are filtered out in the first-stage dust collection box. During wet dust collection in the second-stage dust collection box, water is sprayed by the spray nozzles to settle the dust particles. In this process, the sludge discharge port is not opened initially, and the spray nozzles continue to spray water. After the water level reaches the air passage, the sludge discharge port is opened to gradually drain the water, maintaining the water level at the air passage position. This allows the gas blocked by the baffle to come into contact with the water first and then rise to the bottom of the spray nozzles, which can more effectively remove dust and prevent the walls, spray nozzles, or sludge discharge port of the wet dust collection device from being blocked.

[0007] Furthermore, the bottom of the primary dust collector and the secondary dust collector are connected to fixed supports. The fixed supports are used to support the primary dust collector and the secondary dust collector.

[0008] Furthermore, the bottom of the primary dust collector is funnel-shaped. This design facilitates the sliding of large dust particles to the dust collection port.

[0009] Furthermore, the bottom of the secondary dust collector is funnel-shaped. This design facilitates the discharge of sludge from the sludge outlet.

[0010] Furthermore, the secondary dust collector has a water inlet parallel to the air outlet on its side. The spray system includes a water seal tank connected to the water inlet, with an overflow outlet at the top. The water seal tank is connected to a circulating water tank, which in turn is connected to a spray pipe located inside the secondary dust collector. The water seal tank maintains the water level in the secondary dust collector parallel to the air outlet. The overflowing water is then recycled through the circulation system and sprayed out from the spray pipe.

[0011] Furthermore, the spray pipe is a ring-shaped spray pipe. This results in a wider and more uniform spray range of water mist.

[0012] Furthermore, a demister is installed near the exhaust port in the secondary dust collector, positioned above the spray pipe. A sprayer is also provided to remove liquid droplets entrained in the gas. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a kiln dust removal device according to the present invention. Detailed Implementation

[0014] The following detailed explanation illustrates the specific implementation methods:

[0015] The reference numerals in the accompanying drawings of the instruction manual include: fixed bracket 1, primary dust collector 2, air inlet 3, dust collection port 4, air outlet 5, secondary dust collector 6, baffle 7, air passage 8, sludge discharge port 9, spray pipe 10, demister 11, water seal tank 12, overflow port 13, circulating water tank 14, and air outlet 15.

[0016] The basic implementation examples are as follows: Figure 1 As shown: A kiln dust removal device includes a primary dust collector 2, a funnel-shaped air inlet 3 at the top of the primary dust collector 2 extending into the interior of the primary dust collector 2, a dust collection port 4 at the bottom of the primary dust collector 2, an air outlet 5 on the side wall of the primary dust collector 2, the air outlet 5 being connected to a secondary dust collector 6, a mud discharge port 9 at the bottom of the secondary dust collector 6, a baffle 7 inside the secondary dust collector 6, a gradually narrowing air passage 8 on the baffle 7, a spray element on the side of the baffle 7 away from the air outlet 5, an exhaust port at the top of the secondary dust collector 6, and the bottoms of the primary dust collector 2 and the secondary dust collector 6 being funnel-shaped, with a fixed support 1 connected to the bottoms of the primary dust collector 2 and the secondary dust collector 6.

[0017] The secondary dust collector 6 has a water inlet parallel to the air outlet 8 on its side. The spraying components include a water seal tank 12, which is connected to the water inlet. The top of the water seal tank 12 has an overflow outlet 13. The water seal tank 12 is connected to a circulating water tank 14, which is connected to an annular spray pipe 10. The spray pipe 10 is located inside the secondary dust collector 6. The secondary dust collector 6 has a demister 11 near the exhaust port, which is located above the spray pipe 10.

[0018] The working principle and beneficial effects of the scheme are as follows: when in use, the dust-containing gas is introduced into the air inlet 3, and the large dust particles in the gas fall to the bottom of the primary dust removal tank 2, and the inertia force of the dust particles is used to make the dust particles separate from the gas flow when the gas flow direction is sharply changed, the large dust particles are directly left at the bottom of the primary dust removal tank 2 and accumulated at the dust collecting port 4, and the small dust particles are still in the gas and bypass the horn-shaped air inlet 3 together with the gas, enter the secondary dust removal tank 6 from the air outlet 5, and the baffle 7 in the secondary dust removal tank 6 blocks the gas, so that the gas sinks and enters the side of the baffle 7 away from the air outlet 5 through the gas passing port 8 formed on the baffle 7, the dust-containing gas is fully contacted with the water mist formed by the spray pipe 10, and the dust particles are adsorbed and coagulated when colliding with the liquid droplets, so that the dust particles sink together with the liquid to form muddy wet dust, and the evolved gas is removed through the demister 11, and then discharged through the exhaust port. The dust removal tank is divided into two stages in the scheme, the large dust particles are filtered out in the primary dust removal tank 2, and the spray member sprays water when wet dust removal is performed in the secondary dust removal tank 6, so that the dust particles sink, and in this process, the mud discharge port 9 is not opened first, the spray member continuously sprays water, the water level reaches the gas passing port 8, the water seal tank 12 keeps the water in the secondary dust removal tank 6 at the parallel position of the gas passing port 8, and the water level is kept at the position of the gas passing port 8, so that the gas blocked by the baffle 7 is first contacted with the water and then rises to the lower side of the spray member, which can more effectively remove dust, and the overflowed water is recycled through the circulating system and sprayed from the spray pipe 10, and the mud is discharged when the mud discharge port 9 is opened.

[0019] The above is only an embodiment of the present application, and the specific structure and characteristics of the scheme are not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should be regarded as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A dust removal device for a kiln, characterized by: The dust removal device comprises a primary dust removal box, a secondary dust removal box and a circulating water tank.

2. A dust removal device for a kiln according to claim 1, characterized in that: The bottom of the primary dust removal box is funnel-shaped.

3. A dust removal device for a kiln according to claim 2, characterized in that: The bottom of the secondary dust removal box is funnel-shaped.

4. A dust removal device for a kiln according to claim 3, characterized in that: The side of the secondary dust removal box is provided with a water inlet parallel to the air outlet.

5. A kiln dust extraction device according to claim 4, characterised in that: The spray pipe is an annular spray pipe.

6. A kiln dust extraction device according to claim 5, characterised in that: The secondary dust removal box is provided with a demister near the air outlet, and the demister is located above the spray pipe.

7. A kiln dust extraction device according to claim 6, characterised in that: ​

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