Construction waste negative pressure impurity removal device

Abstract

The utility model relates to fitment garbage treatment equipment technical field especially building garbage negative pressure edulcoration device, including sedimentation tank body, the inside of sedimentation tank body is equipped with filter screen, the bottom of sedimentation tank body is equipped with lower hopper, the bottom discharge gate of lower hopper is equipped with star type dust discharging valve, the below of star type dust discharging valve is equipped with light material collection box, the top of sedimentation tank body is connected with fan and still is equipped with a plurality of air suction pipes, the bottom end air inlet of air suction pipe is inclined, the bottom end of air suction pipe is through filter screen and extends to its below. The scheme is through the form that air suction pipe is designed to insert the inside of box and is opened the oblique mouth, increases the airflow diffusion area, suddenly expands in combination with the inside space of sedimentation tank body, makes the airflow speed sudden drop, and the light material can be efficiently settled under the action of gravity, avoids direct impact filter screen or enters the fan, has played the effect of efficient separation and settlement.

Description

Technical Field

[0001] This utility model relates to the technical field of construction waste treatment equipment, and in particular to a negative pressure impurity removal device for construction waste. Background Technology

[0002] In current construction waste disposal processes, positive pressure air separation is used at the front end, effectively removing 80% of lightweight materials. However, some lightweight materials cannot be separated and flow into the subsequent crushing process. After crushing, fine lightweight materials cannot be sorted manually, but positive pressure air separation can effectively remove them, although it generates significant dust. Negative pressure air separation is an effective solution, using airflow to draw lightweight materials away from the main materials. However, existing negative pressure air separation equipment often suffers from complex structures, low separation efficiency, high energy consumption, or inconvenient maintenance. For example, some equipment has poor settling effects, causing lightweight materials to be directly sucked into the fan, accelerating fan wear; some equipment has poor sealing at the discharge port, affecting the stability of the system's negative pressure. Therefore, there is an urgent need for a negative pressure air separation device with a reasonable structure, high separation efficiency, stable operation, and easy maintenance. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a negative pressure impurity removal device for construction waste.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a negative pressure impurity removal device for construction waste, comprising a settling box, a filter screen inside the settling box, a hopper at the bottom of the settling box, a star-shaped ash discharge valve at the bottom outlet of the hopper, a lightweight material collection box below the star-shaped ash discharge valve, a fan connected through the top of the settling box, and multiple suction pipes also connected through the top of the settling box. The bottom air outlet of the suction pipes is inclined, and the bottom end of the suction pipes passes through the filter screen and extends below it.

[0005] Preferably, a bamboo-joint tube is installed at the top of the suction pipe, and a suction hood is connected to one end of the bamboo-joint tube. The suction hood is located above the belt conveyor.

[0006] Preferably, the top of the settling box is provided with an air inlet, and the air inlet pipe is inserted into the air inlet.

[0007] Preferably, the air outlet of the fan is connected to an air outlet pipe, and the air outlet pipe is connected to a dust removal system.

[0008] Preferably, the bottom of the settling tank is equipped with multiple support legs, which are arranged at equal angles.

[0009] Preferably, the side of the settling tank is provided with an inspection port, and an inspection door is sealed and installed at the inspection port, the inspection door being located below the filter screen.

[0010] Compared with the prior art, the present invention has the following beneficial effects: This solution increases the airflow diffusion area by designing the suction pipe to be inserted into the box with an angled opening. Combined with the sudden expansion of the internal space of the settling box, the airflow speed drops sharply, and lightweight materials can settle efficiently under the action of gravity, avoiding direct impact on the filter or entry into the fan, thus achieving efficient separation and settling.

[0011] The system employs a two-stage separation process using a filter screen. Most of the lightweight materials are collected in the settling chamber, while only extremely fine dust and lightweight materials pass through the filter screen into the fan and are discharged to the external dust removal system through the outlet duct. This significantly reduces the amount of material entering the fan, effectively reducing fan wear and extending equipment life. By using a rotary valve as the discharge device, continuous and automatic discharge is achieved while maintaining negative pressure inside the system, ensuring the continuity and stability of the sorting process. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] In the diagram: Belt conveyor 100, suction hood 101, bamboo joint tube 102, suction pipe 103, suction port 201, filter screen 202, settling box 203, inspection door 204, support leg 205, hopper 206, rotary valve 207, lightweight material collection box 208, fan 301, exhaust pipe 302. Detailed Implementation

[0014] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0015] like Figure 1The illustrated negative pressure impurity removal device for construction waste includes a settling chamber 203. A filter screen 202 is installed inside the settling chamber 203. A hopper 206 is located at the bottom of the settling chamber 203, and a star-shaped ash discharge valve 207 is installed at the bottom outlet of the hopper 206. A lightweight material collection box 208 is located below the star-shaped ash discharge valve 207. A fan 301 is connected through the top of the settling chamber 203. Multiple suction pipes 103 are also installed through the top of the settling chamber 203. The bottom air outlet of each suction pipe 103 is inclined. The bottom end of each suction pipe 103 passes through the filter screen 202 and extends below it. The filter screen 202 can be a drawer type for easy access. Cleaning and maintenance of filter screen 202: After the intake mixed airflow enters the wide settling chamber of settling box 203 through the suction pipe 103, the flow rate decreases rapidly. Most of the light materials settle under the action of gravity, while the fine particles that fail to settle rise with the airflow and are intercepted by filter screen 202. The intercepted dust will eventually fall back to the bottom of the settling chamber under the action of airflow disturbance and its own weight. The settled light materials fall into the discharge hopper 206 and are discharged in batches and quantities into the light material collection box 208 below through the continuously operating star-shaped ash discharge valve 207. The operator can observe the internal situation through the inspection door 204 or pull out the filter screen 202 for cleaning.

[0016] A bamboo-joint tube 102 is installed at the top of the suction pipe 103. One end of the bamboo-joint tube 102 is connected to a suction hood 101, which is located above the belt conveyor 100. The suction hood 101 can be flexibly positioned via the bamboo-joint tube 102, so that the opening of the suction hood 101 is aligned with the material approaching the belt conveyor 100, thereby improving the adaptability of the material suction operation.

[0017] The top of the settling box 203 is provided with an air inlet 201, and the air inlet 103 is inserted into the air inlet 201. The air inlet 201 can be used to install the air inlet 103.

[0018] The outlet of the fan 301 is connected to an outlet duct 302, which in turn connects to a dust removal system. The outlet duct 302 delivers the gas to the dust removal system, preventing fine impurities in the gas from being emitted into the working environment and thus protecting the working environment. A baghouse dust collector can be used as the dust removal system.

[0019] The bottom of the settling box 203 is equipped with multiple support legs 205, which are arranged at equal angles. The multiple support legs 205 are used to support the settling box 203, thereby improving the stability of the settling box 203 in its position.

[0020] The settling chamber 203 has an inspection port on its side, and a sealed inspection door 204 is installed at the inspection port, located below the filter screen 202. Sealing strips are installed around the four edges of the inspection door 204, increasing the seal between the inspection door 204 and the inspection port, preventing gas leakage, and improving the stability of the internal air pressure of the settling chamber 203. When performing maintenance on the interior of the settling chamber 203, the inspection door 204 can be simply removed from the inspection port, facilitating operation by staff.

[0021] Working principle: Start the fan 301 to discharge the gas in the settling chamber 203 and establish negative pressure. After a stable negative pressure is formed inside the settling chamber 203 (about 5-10 seconds), start the rotary valve 207. When the material on the belt conveyor 100 passes under the suction hood 101, the light impurities are adsorbed by the negative pressure and enter the settling chamber 203 through the suction pipe 103. The light impurities settle and are collected in the settling chamber 203 and discharged through the rotary valve 207. Fine dust is intercepted by the filter screen 202, while the gas is discharged to the dust removal system through the fan 301, completing the entire sorting process.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A negative pressure impurity removal device for construction waste, comprising a settling box (203), characterized in that, The settling box (203) is equipped with a filter screen (202) inside. The bottom of the settling box (203) is equipped with a hopper (206). The bottom outlet of the hopper (206) is equipped with a star-shaped ash discharge valve (207). A lightweight material collection box (208) is provided below the star-shaped ash discharge valve (207). A fan (301) is connected through the top of the settling box (203). Multiple suction pipes (103) are also connected through the top of the settling box (203). The bottom air outlet of the suction pipe (103) is inclined. The bottom end of the suction pipe (103) passes through the filter screen (202) and extends to its bottom.

2. The negative pressure impurity removal device for construction waste according to claim 1, characterized in that, The top end of the suction pipe (103) is equipped with a bamboo joint pipe (102), and one end of the bamboo joint pipe (102) is connected to a suction hood (101), which is located above the belt conveyor (100).

3. The negative pressure impurity removal device for construction waste according to claim 1, characterized in that, The top of the settling box (203) is provided with an air inlet (201), and the air inlet pipe (103) is inserted into the air inlet (201).

4. The negative pressure impurity removal device for construction waste according to claim 1, characterized in that, The air outlet of the fan (301) is connected to an air outlet pipe (302), and the air outlet pipe (302) is connected to a dust removal system.

5. The negative pressure impurity removal device for construction waste according to claim 1, characterized in that, The bottom of the settling box (203) is equipped with multiple support legs (205), which are arranged at equal angles.

6. The negative pressure impurity removal device for construction waste according to claim 1, characterized in that, The settling box (203) has an inspection port on its side, and an inspection door (204) is sealed and installed at the inspection port. The inspection door (204) is located below the filter screen (202).

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