Air return and dust collection system of pulverizer

Abstract

The utility model relates to the technical field of pulverizer return air dust collection, and discloses a pulverizer return air dust collection system, which comprises a pulverizer, a cyclone dust collector, an air return pipe and an exhaust cloth bag, the top of the cyclone dust collector is respectively connected with the air return pipe and the dust collection cloth bag through a three-way pipe, the side part of the cyclone dust collector is provided with an air outlet pipe, and the air outlet pipe is connected with the dust collection cloth bag through a three-way pipe. And the other end of the air return pipe and the other end of the air outlet pipe are communicated to the inner cavity of the crusher. Due to the fact that the air return pipe is additionally arranged on the top of the cyclone dust collector, most of air carrying micro dust can return to a cabin of the pulverizer again, a very small amount of air is exhausted through the air exhaust cloth bag, and due to the fact that the air return device is additionally arranged, the air pressure of the air exhaust cloth bag is very small (close to the atmospheric pressure), the dust overflow proportion is very small, and the dust is prevented from falling off. Therefore, the problems that in the prior art, dust is prone to blocking gaps of a cloth bag, the ventilation rate is reduced, finer dust penetrates out of the cloth bag, and the respiratory system of people is affected are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of return air dust collection for a pulverizer, in particular to a return air dust collection system for a pulverizer. Background Art

[0002] At present, the main technical methods for collecting powder and preventing dust in crushers are:

[0003] 1. Shakron + fan shutoff + multi-duct dust collection bag;

[0004] 2. Shakron + fan + pulse dust collector;

[0005] The function of the Shaklon is to collect powder, the function of the fan is to prevent dust during discharge, the function of the multi-channel dust collection bag is to exhaust air and filter fine dust, and the function of the pulse dust collector is to suck air and filter fine dust.

[0006] In the above two solutions, fresh air enters the crusher, and all air must be discharged through multi-duct dust bags or pulse dust collectors.

[0007] The main disadvantages of option 1 are:

[0008] The cost of shutting down the fan is high;

[0009] The air pressure in the multi-channel dust bag is high:

[0010] Dust can easily clog the gaps in the bags, causing a decrease in air permeability and thus reducing production;

[0011] There are still finer dust particles that pass through the bag and affect people's respiratory system.

[0012] The main disadvantages of option 2 are:

[0013] The cost of shutting down the fan is high, and the cost of the pulse dust collector is high;

[0014] Pulse dust collector, which makes loud operating noise;

[0015] Pulse bag filter elements also need to be replaced regularly. Utility Model Content

[0016] The purpose of the utility model is to solve the problems existing in the prior art and to propose a crusher return air dust collection system.

[0017] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0018] The return air dust collection system of the grinder includes a grinder, a Shaklon powder collector, a return air duct and an exhaust bag. The top of the Shaklon powder collector is connected to the return air duct and the dust collection bag respectively through a three-way pipe. The side of the Shaklon powder collector is provided with an outlet duct. The other end of the return air duct and the other end of the outlet duct are both connected to the inner cavity of the grinder.

[0019] Preferably, the input end of the return air duct is at the same level as the input end of the dust collecting bag.

[0020] Preferably, the crusher includes a body and a feed hopper arranged above the body, and its output end is connected to the input end of the body, the other end of the return air duct is connected to the inner cavity of the feed hopper output end, and the other end of the outlet air duct is connected to the inner cavity of the body through the side of the body.

[0021] Preferably, the bottom of the Shaklong powder collector is a discharge port, and a second cloth bag is sleeved on the discharge port.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The utility model adds an air return duct on the top of the Shaklon powder collector and sets exhaust bags, so that most of the wind carrying fine dust can be returned to the crusher cabin, and a very small amount of wind is discharged through the exhaust bags. Since the return air device is added, the air pressure of the exhaust bags is very small (close to atmospheric pressure), so the proportion of dust overflow is extremely small, which effectively solves the problem in the prior art that dust easily clogs the gaps in the bags, resulting in a decrease in air permeability, resulting in the existence of finer dust passing through the bags and affecting people's respiratory system. At the same time, since the dust problem is solved, the crusher can be continuously produced and processed, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the composition of Example 1 of the pulverizer return air dust collection system proposed by the utility model;

[0025] Figure 2 This is a schematic diagram of the composition of Example 2 of the pulverizer return air dust collection system proposed in the present utility model.

[0026] In the figure: 1. Crusher; 2. Shakron powder collector; 3. Return air duct; 4. Exhaust bag; 5. Outlet duct; 6. Machine body; 7. Feed hopper; 8. Closing device; 9. T-piece; 10. Second bag. DETAILED DESCRIPTION

[0027] 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 the embodiments.

[0028] Reference Figure 1 The return air dust collection system of the grinder includes a grinder 1, a Shaklon powder collector 2, a return air duct 3 and an exhaust bag 4. The top of the Shaklon powder collector 2 is connected to the return air duct 3 and the dust collection bag through a three-way pipe 9. The side of the Shaklon powder collector 2 is provided with an outlet pipe 5. The other end of the return air duct 3 and the other end of the outlet pipe 5 are both connected to the inner cavity of the grinder 1.

[0029] When the device is in use, a return air duct 3 is added to the top of the Shaklon powder collector 2. On the basis of setting the exhaust bag 4, most of the wind carrying fine dust can be returned to the cabin of the grinder 1, and a very small amount of wind is discharged through the exhaust bag 4. Due to the addition of the return air device, the air pressure of the exhaust bag 4 is very small (close to atmospheric pressure), so the proportion of dust overflow is extremely small, which effectively solves the problem in the prior art that dust easily clogs the gaps in the bag, resulting in a decrease in air permeability, resulting in the presence of finer dust passing through the bag and affecting people's respiratory system. At the same time, since the dust problem has been solved, the grinder 1 can be continuously produced and processed to improve production efficiency.

[0030] In this embodiment, the input end of the return air duct 3 is at the same level as the input end of the dust collecting bag.

[0031] In this embodiment, the crusher 1 includes a body 6 and a feed hopper 7 arranged above the body 6, and its output end is connected to the input end of the body 6. The other end of the return air duct 3 is connected to the inner cavity of the output end of the feed hopper 7, and the other end of the outlet air duct 5 is connected to the inner cavity of the body 6 through the side of the body 6. The purpose is that when feeding, the material drives the reflux dust in the return air duct 3 to re-enter the body 6, so that most of the air flow and fine dust can be circulated internally and no longer flow to the outside of the system, thereby avoiding the escape of dust.

[0032] In this embodiment, the bottom of the Shakron powder collector 2 is the discharge port, and a second cloth bag 10 is sleeved at the discharge port. The length of the second cloth bag 10 is about 1.5 meters, which is greater than the distance from the discharge port to the ground. As an elastic exhaust device, it can dynamically reduce the internal air pressure of the Shakron, reduce the air volume of the discharge port of the Shakron powder collector 2, and collect dust at the same time. Because a return air duct 3 is provided, on the basis of a significant reduction in the air volume, even if the fan is not turned off, there is basically no dust floating when the material is discharged, thereby realizing dust-free processing and reducing costs.

[0033] Example 2

[0034] like Figure 2As shown, the return air dust collection system of the crusher includes a crusher 1, a Shaklon powder collector 2, a return air duct 3 and an exhaust bag 4. The top of the Shaklon powder collector 2 is connected to the return air duct 3 and the dust collection bag through a three-way pipe 9. The side of the Shaklon powder collector 2 is provided with an outlet duct 5. The other end of the return air duct 3 and the other end of the outlet duct 5 are both connected to the inner cavity of the crusher 1.

[0035] In this embodiment, the input end of the return air duct 3 is at the same level as the input end of the dust collecting bag.

[0036] In this embodiment, the crusher 1 includes a body 6 and a feed hopper 7 arranged above the body 6, and its output end is connected to the input end of the body 6. The other end of the return air duct 3 is connected to the inner cavity of the output end of the feed hopper 7, and the other end of the outlet air duct 5 is connected to the inner cavity of the body 6 through the side of the body 6.

[0037] In this embodiment, the bottom of the Shaklon powder collector 2 is a discharge port, and the discharge port is provided with a closing device 8, which can be a closed container or a fan. In this embodiment, the second cloth bag 10 may not be used, and the closing device 8 is still used to collect dust at the discharge port. Because a return air duct 3 is provided, the air output is greatly reduced, and there will be no dust clogging the gaps in the cloth bag, resulting in a decrease in air permeability, resulting in the presence of finer dust passing through the cloth bag.

[0038] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. The pulverizer return air dust collection system is characterized by: It includes a crusher, a Shaklon powder collector, a return air duct and an exhaust bag. The top of the Shaklon powder collector is connected to the return air duct and the dust collecting bag through a three-way pipe. The side of the Shaklon powder collector is provided with an outlet duct. The other end of the return air duct and the other end of the outlet duct are both connected to the inner cavity of the crusher.

2. The pulverizer return air dust collection system according to claim 1, characterized in that: The input end of the return air duct is at the same level as the input end of the dust collecting bag.

3. The pulverizer return air dust collection system according to claim 1, characterized in that: The crusher includes a body and a feed hopper arranged above the body, and its output end is connected to the input end of the body. The other end of the return air duct is connected to the inner cavity of the feed hopper output end, and the other end of the outlet air duct is connected to the inner cavity of the body through the side of the body.

4. The pulverizer return air dust collection system according to claim 2, characterized in that: The bottom of the Shaklong powder collector is a discharge port, and a second cloth bag is sleeved on the discharge port.

5. The pulverizer return air dust collection system according to claim 1, characterized in that: The bottom of the Shaklong powder collector is a discharge port, and the discharge port is provided with a closing device.

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