Filter box for treating raised cement dust

Abstract

The utility model discloses a filter box for treating raised cement dust, which comprises a box body, two ends of the box body are respectively provided with a reducing part communicated with the inside of the box body, and the size of the reducing part is gradually increased from the outside of the box body to the inside of the box body; and at least one layer of filter screen is also arranged in the box body. The dust raising speed is firstly reduced through the reducing part, dust raising large particles can be captured by the filter screen and stay in the filter box, then the effect of preventing cement from caking in the main pipe to affect the air draft efficiency is achieved, the safety of the working environment and equipment is further improved, and the filter box is simple in structure, low in cost and suitable for popularization and application. And meanwhile, most lost cement can flow back to the stirring tank to be reused.

Description

Technical Field

[0001] This utility model relates to the technical field of dust-containing waste gas treatment devices, and in particular to a filter box for treating cement dust. Background Technology

[0002] When dust-laden exhaust gas is typically treated using dust-collecting ducts, it comes into contact with various media, such as sawdust, cement, powder, and smoke. Many of these media can be easily handled under normal conditions, but when moisture appears in the duct, the difficulty of dust extraction increases significantly, for example, with cement dust.

[0003] Existing dust removal ducts cannot handle situations where water vapor and cement dust enter the duct together. Prolonged handling of the aforementioned water vapor-containing dust can lead to blockages inside the duct, causing it to accumulate into clumps that are difficult to clean. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a filter box for treating cement dust. By reducing the dust velocity through the variable diameter section, large dust particles can be captured by the filter screen and retained in the filter box, thereby preventing cement from clumping inside the main pipe and affecting the ventilation efficiency. This further improves the safety of the working environment and equipment. Moreover, this filter box has a simple structure and low cost, and can also return most of the lost cement to the mixing tank for reuse.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A filter box for treating cement dust includes a box body, and two ends of the box body are respectively provided with variable diameter sections communicating with the inside of the box body. The size of the variable diameter sections gradually increases from the outside of the box body to the inside of the box body.

[0007] The box is also equipped with at least one layer of filter screen.

[0008] Furthermore, the variable diameter section is square to round, with the square opening of the variable diameter section connected to the housing and the round opening of the variable diameter section used to connect to the air duct.

[0009] Furthermore, the housing is equipped with a support frame, and the filter screen is detachably connected to the housing via the support frame.

[0010] Furthermore, the cross-section of the bracket is L-shaped.

[0011] Furthermore, the housing is equipped with multiple nozzles, which are connected to water pipes outside the housing, and the water outlet of the nozzles is oriented towards the filter screen.

[0012] Furthermore, the housing is equipped with an inspection door. Furthermore, the water pipe is equipped with a solenoid valve.

[0013] Furthermore, the filter screen is tilted.

[0014] Furthermore, the inspection door is equipped with an inclined water baffle.

[0015] The beneficial effects of this utility model are:

[0016] This invention reduces the dust velocity by using a variable diameter section, allowing large dust particles to be captured by the filter screen and retained inside the filter box. This prevents cement from caking inside the main pipe and affecting the ventilation efficiency, further improving the safety of the working environment and equipment. Moreover, this filter box has a simple structure and low cost, and can also return most of the lost cement to the mixing tank for reuse. Attached Figure Description

[0017] Figure 1 This is a front view of a filter box for treating cement dust in an embodiment of this utility model;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle section;

[0019] Figure 3 A side view of a filter box for treating cement dust;

[0020] Figure 4 A top view of a filter box for treating cement dust;

[0021] In the diagram, 1. housing; 2. reducing section; 3. filter screen; 4. bracket; 5. nozzle; 6. water pipe; 7. inspection door; 8. solenoid valve; 9. baffle plate. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] See Figures 1-4 This utility model provides a technical solution:

[0024] Example:

[0025] like Figures 1-4As shown, a filter box for treating cement dust includes a box body 1. Both ends of the box body 1 are respectively provided with variable diameter parts 2 that communicate with the interior of the box body 1. The size of the variable diameter parts 2 gradually increases from the outside of the box body 1 to the inside of the box body 1. The box body 1 is formed by bending sheet metal and pre-reserving spray pipe holes. After the outer shell is welded by bending sheet metal, the box body 1 can be fixed with a bracket 4 after it is formed.

[0026] The housing 1 is also equipped with at least one layer of over-sloped filter screen.

[0027] like Figure 1 and Figure 4 As shown, the variable diameter section 2 is square to round. The square opening of the variable diameter section 2 is connected to the box 1 (rectangular structure), and the round opening of the variable diameter section 2 is used to connect the air duct (connected to the air duct branch pipe).

[0028] The housing 1 is equipped with a (welded and fixed) bracket 4, and the filter screen is detachably connected to the housing 1 through the bracket 4.

[0029] The cross-section of the bracket 4 is L-shaped.

[0030] like Figure 2 and Figure 3 As shown, the housing 1 is equipped with multiple nozzles 5 (the nozzles 5 are clip nozzles 5), the nozzles 5 are connected to the water pipe 6 outside the housing 1, the water pipe 6 is equipped with a solenoid valve 8, and the water outlet end of the nozzle 5 is set towards the filter screen.

[0031] like Figure 1 , Figure 3 and Figure 4 As shown, an inspection door 7 is connected to the housing 1 via a hinge. A sealing strip is provided between the inspection door 7 and the housing 1 to prevent air leakage.

[0032] like Figure 1 and Figure 3 As shown, the inspection door 7 is equipped with an inclined baffle 9.

[0033] Working principle: This embodiment uses a mixing tank as an example for explanation:

[0034] The cement dust and water vapor generated by the mixing tank enter the box 1 from the lower diameter section 2. The cross-sectional area (i.e. the air passage cross-sectional area) of the diameter section 2 increases from bottom to top. As the air passage cross-sectional area increases, the wind speed will decrease sharply.

[0035] During the rising process of cement dust and water vapor, the cement dust and water vapor combine to form cement particles, which increase in weight and decrease in speed. There are two layers of filter screens 3 above the lower diameter section 2. Most of the cement particles will clump together and adhere to the filter screens 3. A small portion will still enter the main duct. However, this portion of dust entering the main duct is of very low quality and will be directly sucked away. Therefore, its impact on the blockage inside the duct is very small and can even be ignored.

[0036] Meanwhile, during the dust control process, the solenoid valve 8 opens every so often, and water is used to clean the filter screen 3 through the nozzle 5, breaking up the cement blocks attached to it and mixing them with the water to flow back to the mixing tank below the variable diameter section 2 for reuse.

[0037] The water output time of nozzle 5 should not be too long, and should be controlled within 10 seconds. A longer time will affect the solid-liquid ratio in the mixing tank. At the same time, a baffle plate 9 is welded on the inspection door 7 to prevent water from flowing out from the gap on the lower side of the inspection door 7 during spraying and affecting the on-site working environment.

[0038] This invention reduces the dust velocity by using a variable diameter section, allowing large dust particles to be captured by the filter screen and retained inside the filter box. This prevents cement from caking inside the main pipe and affecting the ventilation efficiency, further improving the safety of the working environment and equipment. Moreover, this filter box has a simple structure and low cost, and can also return most of the lost cement to the mixing tank for reuse.

[0039] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A filter box for treating cement dust, characterized by: The device includes a housing, and each end of the housing is provided with a variable diameter section that communicates with the interior of the housing. The size of the variable diameter section gradually increases from the outside of the housing to the inside of the housing. The box is also equipped with at least one layer of filter screen.

2. The filter box for treating cement dust according to claim 1, characterized in that: The variable diameter section is square to round. The square opening of the variable diameter section is connected to the housing, and the round opening of the variable diameter section is used to connect the air duct.

3. The filter box for treating cement dust according to claim 1, characterized in that: The housing is equipped with a support frame, and the filter screen is detachably connected to the housing via the support frame.

4. The filter box for treating cement dust according to claim 3, characterized in that: The cross-section of the bracket is L-shaped.

5. The filter box for treating cement dust according to claim 1, characterized in that: The chamber is equipped with multiple nozzles, which are connected to water pipes outside the chamber, with the water outlet of each nozzle facing the filter screen.

6. The filter box for treating cement dust according to claim 1, characterized in that: The enclosure is equipped with an inspection door.

7. The filter box for treating cement dust according to claim 5, wherein: The water pipe is equipped with a solenoid valve.

8. The filter box for treating cement dust according to claim 1, characterized in that: The filter screen is tilted.

9. The filter box for treating cement dust according to claim 6, characterized in that: The inspection door is equipped with an inclined water baffle.

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