Formaldehyde production activated carbon filter

Abstract

The utility model relates to the technical field of formaldehyde production equipment, and particularly discloses an activated carbon filter for formaldehyde production. The filter comprises a filter body, a plurality of first activated carbon filter screen plates are arranged in the filter body in the gas flowing direction, the peripheries of the first activated carbon filter screen plates abut against the inner wall of the filter body, heating assemblies are arranged on the first activated carbon filter screen plates, and a control system is arranged on the filter body. The control system controls a plurality of heating assemblies to sequentially heat activated carbon in each first activated carbon filter screen plate in the flowing direction of gas; tail gas is adsorbed through the multiple first activated carbon filter screen plates, the control system controls the multiple heating assemblies to sequentially heat the first activated carbon filter screen plates and decompose tail gas such as formaldehyde adsorbed by activated carbon, and when one first activated carbon filter screen plate is heated, the other first activated carbon filter screen plates continuously adsorb the tail gas; the formaldehyde tail gas filtering efficiency of the activated carbon filter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of formaldehyde production equipment, in particular to an activated carbon filter for formaldehyde production. Background Art

[0002] Formaldehyde is an important raw material for industrial production and a basic industry for chemical production. A large amount of tail gas is generated during the production of formaldehyde. Every ton of formaldehyde product will produce 37% of tail gas, about 600 cubic meters. The tail gas contains formaldehyde, hydrogen, carbon monoxide, methane, carbon dioxide, nitrogen and a small amount of water. If the tail gas generated by formaldehyde production is naturally discharged, it will cause serious harm to the environment. The tail gas generated by formaldehyde production needs to be filtered.

[0003] For example, the Chinese utility model patent with publication (announcement) number CN220609546U discloses a formaldehyde production activated carbon filter, including a filter housing, activated carbon filter plates arranged on the upper and lower sides of the filter, which are used to absorb formaldehyde and other gases in the exhaust gas. A spring is arranged between the bottom activated carbon filter plate and the inner wall of the filter housing, and a pressure rod is arranged between the top of the top activated carbon filter plate and the cover plate of the filter. Under the action of the spring and the pressure rod, the activated carbon filter plate can be pressed down to the bottom, and automatically pops up after the cover is opened. When replacing the filter screen, the activated carbon filter plate can be taken out without going deep into the filter.

[0004] When replacing the activated carbon filter plate, it is necessary to stop the air intake into the filter, and then open the cover to replace the activated carbon filter plate, which affects the filtering efficiency of the activated carbon filter on formaldehyde exhaust. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model aims to provide a formaldehyde production activated carbon filter to improve the filtering efficiency of the activated carbon filter on formaldehyde tail gas.

[0006] The technical solution adopted by the utility model is:

[0007] A formaldehyde production activated carbon filter comprises a filter body, an air inlet pipe arranged at the top of the filter body and an exhaust pipe arranged at the bottom of the filter body, a plurality of first activated carbon filter screen plates are arranged in the filter body along the gas flow direction, the outer periphery of the first activated carbon filter screen plates abuts against the inner wall of the filter body, a heating component is arranged on the first activated carbon filter screen plate, a control system is arranged on the filter body, the plurality of heating components are electrically connected to the control system, and the control system controls the plurality of heating components to heat the activated carbon in each first activated carbon filter screen plate in turn along the gas flow direction.

[0008] The exhaust gas generated during the formaldehyde production process is adsorbed by multiple first activated carbon filter plates. The control system controls multiple heating components to heat the first activated carbon filter plates in turn to decompose the formaldehyde and other exhaust gases adsorbed by the activated carbon. While one first activated carbon filter plate is heated, the remaining first activated carbon filter plates continue to adsorb the exhaust gas, thereby improving the filtration efficiency of the activated carbon filter for formaldehyde exhaust gas.

[0009] Optionally, the first activated carbon filter screen plates are arranged in a W shape.

[0010] The first activated carbon filter screen plate is arranged in a W shape, which increases the contact area between the gas and the first activated carbon filter screen plate, thereby improving the filtering efficiency of the filter for formaldehyde gas.

[0011] Optionally, a first connecting rod is provided in the filter body, one end of the first connecting rod abuts against the top inner wall of the filter body, and the other end of the first connecting rod passes through multiple first activated carbon filter panels in sequence along the vertical direction and is detachably connected to the first activated carbon filter panels.

[0012] When the first activated carbon filter screen plate needs to be replaced, multiple first activated carbon filter screen plates are taken out from the filter body at the same time through the first connecting rod and then replaced, thereby improving the replacement efficiency of the first activated carbon filter screen plates.

[0013] Optionally, a plurality of first connecting rods are provided, and the plurality of first connecting rods are evenly spaced and arranged in the filter body.

[0014] Optionally, the heating assembly includes a plurality of heating wires, and the activated carbon abuts against the outer periphery of the heating wires.

[0015] Optionally, a second activated carbon filter screen is provided in the exhaust pipe, the outer periphery of the second activated carbon filter screen is in contact with the inner wall of the exhaust pipe, the second activated carbon filter screen heats the activated carbon in the second activated carbon filter screen through a heating component, and the heating component in the second activated carbon filter screen is electrically connected to the control system.

[0016] The second activated carbon filter plate further absorbs the filtered exhaust gas, thereby improving the filtering efficiency of the activated carbon filter on formaldehyde exhaust gas.

[0017] Optionally, a second connecting rod is provided between the second activated carbon filter screen plate and the first activated carbon filter screen plate, and two ends of the second connecting rod are respectively connected to the center of the first activated carbon filter screen plate and the center of the second activated carbon filter screen plate.

[0018] When the first activated carbon filter screen plate is replaced, the second connecting rod drives the second activated carbon filter screen plate to be separated from the exhaust pipe, so as to facilitate the replacement of the second activated carbon filter screen plate.

[0019] Optionally, a cover body is disposed on the top of the filter body, and the air inlet pipe is disposed on the top of the cover body and is connected to the interior of the filter body.

[0020] The beneficial effects of the utility model are:

[0021] The tail gas generated in the formaldehyde production process is adsorbed by multiple first activated carbon filter plates, and the control system controls multiple heating components to heat the first activated carbon filter plates in turn to decompose the formaldehyde and other tail gases adsorbed by the activated carbon. While one first activated carbon filter plate is heated, the remaining first activated carbon filter plates continue to adsorb the tail gas, thereby improving the filtering efficiency of the activated carbon filter on formaldehyde tail gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a cross-sectional view of the overall structure of the utility model;

[0023] Figure 2 It is a schematic structural diagram of the first activated carbon filter screen plate of the utility model.

[0024] The numbers and names in the figure correspond to each other as follows: 1. filter body; 11. air inlet pipe; 12. exhaust pipe; 13. cover body; 2. first activated carbon filter screen; 31. heating wire; 32. heater; 4. first connecting rod; 5. second activated carbon filter screen; 6. second connecting rod. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figure 1-2 , the utility model provides a technical solution:

[0027] A formaldehyde production activated carbon filter includes a filter body 1, an air inlet pipe 11 arranged at the top of the filter body 1, and an exhaust pipe 12 arranged at the bottom of the filter body 1. A cover body 13 is arranged on the top of the filter body 1, and the cover body 13 is rotatably connected to the filter body 1. The air inlet pipe 11 is fixedly connected to the top of the cover body 13 and communicates with the inside of the filter body 1, and the exhaust pipe 12 is fixedly connected to the filter body 1.

[0028] A plurality of first activated carbon filter screen plates 2 are arranged in the filter body 1 along the gas flow direction. The plurality of first activated carbon filter screen plates 2 are arranged in a W shape. Adjacent first activated carbon filter screen plates 2 abut against each other, thereby increasing the contact area between the exhaust gas and the first activated carbon filter screen plates 2 and improving the filtering efficiency of the exhaust gas. The outer periphery of the first activated carbon filter screen plates 2 abuts against the inner wall of the filter body 1. A first connecting rod 4 is vertically arranged in the filter body 1. One end of the first connecting rod 4 passes through the plurality of first activated carbon filter screen plates 2 in sequence along the vertical direction and abuts against the bottom of the filter body 1. The other end of the first connecting rod 4 extends toward the cover body 13. The first connecting rod 4 and the first activated carbon filter screen plates 2 are detachably connected by bolts. In order to improve the stability between the first activated carbon filter screen plates 2 and the filter body 1, a plurality of first connecting rods 4 are provided. The plurality of first connecting rods 4 are evenly spaced in the filter body 1. In this embodiment, four first connecting rods 4 are provided.

[0029] A second activated carbon filter panel 5 is horizontally arranged in the exhaust pipe 12, and the outer periphery of the second activated carbon filter panel 5 is in contact with the inner wall of the exhaust pipe 12. A second connecting rod 6 is arranged between the second activated carbon filter panel 5 and the first activated carbon filter panel 2, and the two ends of the second connecting rod 6 are respectively fixedly connected to the center of the first activated carbon filter panel 2 and the second activated carbon filter panel 5, so that the staff can take out the first activated carbon filter panel 2 and the second activated carbon filter panel 5 at the same time.

[0030] A heating component is provided on the first activated carbon filter screen plate 2, and a control system is provided on the filter body 1. Multiple heating components are electrically connected to the control system. The control system controls the multiple heating components to heat the activated carbon in each first activated carbon filter screen plate 2 in turn along the flow direction of the gas to decompose the formaldehyde absorbed therein. When the first activated carbon filter screen plate 2 is heated, the absorption and filtering effect of the remaining first activated carbon filter screen plates 2 on formaldehyde is not affected. The heating component includes multiple heating wires 31 and a heater 32. The heating wires 31 are arranged in parallel with the corresponding first activated carbon filter screen plates 2. Multiple heating wires 31 are evenly spaced in the first activated carbon filter screen plates 2. The heater 32 is detachably connected to the outside of the filter body 1 by bolts. One end of the heating wire 31 is electrically connected to the heater 32, and the other end of the heating wire 31 is arranged in the first activated carbon filter screen plate 2. The activated carbon abuts against the outer periphery of the heating wire 31, and the heater 32 is electrically connected to the control system.

[0031] The second activated carbon filter screen plate 5 is provided with a heating component, and the activated carbon in the second activated carbon filter screen plate is heated by the heating component. The heating component in the second activated carbon filter screen plate 5 is electrically connected to the control system. When the first activated carbon filter screen plate 2 is heated, the activated carbon in the second activated carbon filter screen plate 5 is heated to decompose the formaldehyde absorbed therein.

[0032] Finally, it should be noted that the above are only preferred examples of the utility model and are not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A formaldehyde production activated carbon filter, comprising a filter body (1), an air inlet pipe (11) arranged at the top of the filter body (1), and an exhaust pipe (12) arranged at the bottom of the filter body (1), characterized in that: A plurality of first activated carbon filter screens (2) are arranged in the filter body (1) along the gas flow direction, the outer periphery of the first activated carbon filter screens (2) abuts against the inner wall of the filter body (1), a heating component is arranged on the first activated carbon filter screen (2), a control system is arranged on the filter body (1), the plurality of heating components are electrically connected to the control system, and the control system controls the plurality of heating components to heat the activated carbon in each first activated carbon filter screen (2) in turn along the gas flow direction.

2. A formaldehyde production activated carbon filter according to claim 1, characterized in that: The plurality of first activated carbon filter screen plates (2) are arranged in a W shape.

3. A formaldehyde production activated carbon filter according to claim 2, characterized in that: A first connecting rod (4) is arranged inside the filter body (1), one end of the first connecting rod (4) abuts against the top inner wall of the filter body (1), and the other end of the first connecting rod (4) sequentially penetrates through a plurality of first activated carbon filter screens (2) in a vertical direction and is detachably connected to the first activated carbon filter screens (2).

4. A formaldehyde production activated carbon filter according to claim 3, characterized in that: A plurality of the first connecting rods (4) are provided, and the plurality of the first connecting rods (4) are evenly spaced and arranged in the filter body (1).

5. The formaldehyde production activated carbon filter according to claim 3, characterized in that: The heating component comprises a plurality of heating wires (31), and the activated carbon abuts against the outer periphery of the heating wires (31).

6. The formaldehyde production activated carbon filter according to claim 1, characterized in that: A second activated carbon filter screen (5) is arranged in the exhaust pipe (12); the outer periphery of the second activated carbon filter screen (5) abuts against the inner wall of the exhaust pipe (12); the second activated carbon filter screen (5) heats the activated carbon in the second activated carbon screen via a heating component; and the heating component in the second activated carbon filter screen (5) is electrically connected to a control system.

7. A formaldehyde production activated carbon filter according to claim 6, characterized in that: A second connecting rod (6) is provided between the second activated carbon filter screen plate (5) and the first activated carbon filter screen plate (2), and two ends of the second connecting rod (6) are respectively connected to the center of the first activated carbon filter screen plate (2) and the center of the second activated carbon filter screen plate (5).

8. The formaldehyde production activated carbon filter according to claim 1, characterized in that: A cover body (13) is arranged on the top of the filter body (1), and the air inlet pipe (11) is arranged on the top of the cover body (13) and is in communication with the interior of the filter body (1).

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