Chemical formaldehyde removal composite air filtration system

Abstract

The present application relates to the field of air purification, more particularly to a chemical formaldehyde removal composite air filtration system, comprising a filter box and a circulating pipe component installed on the filter box, a side box cover with an air outlet being detachably connected to the top of the side of the filter box, and an air inlet component being assembled to the bottom of the side of the filter box; the filter box is internally provided with a filter component, the bottom of the filter component being a formaldehyde removal solvent reflux area, the air inlet component being inserted into the formaldehyde removal solvent reflux area, the top of the filter component being a purified air discharge area, the purified air discharge area being in communication with the air outlet; the lower end of the circulating pipe component being inserted into the formaldehyde removal solvent reflux area. The present application can effectively purify air and reduce formaldehyde in the air, and when purifying air, the formaldehyde removal solvent is sprayed to make the air and the formaldehyde removal solvent mix and contact, so as to decompose formaldehyde; then the formaldehyde and the amino group on the activated carbon in the high polymer composite activated carbon area react chemically, so as to decompose formaldehyde.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air purification, more particularly to a chemical formaldehyde removal composite air filtration system. BACKGROUND

[0002] Formaldehyde pollution in indoor air directly affects people's health. Formaldehyde has great damage to human health, including respiratory tract, liver, immune function, central nervous system, etc.

[0003] The current common method for removing formaldehyde is mainly to open the window and ventilate, use activated carbon and plants to adsorb formaldehyde, and the efficiency of removing formaldehyde is low, the effect is poor, and formaldehyde cannot be quickly and efficiently absorbed and removed, and secondary pollution will be caused. SUMMARY

[0004] The present application is to solve the problems in the prior art, and proposes a chemical formaldehyde removal composite air filtration system.

[0005] To have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not a general review, nor is it intended to determine key / important components or delineate the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a prelude to the detailed description that follows.

[0006] According to a first aspect of the embodiments of the present application, a chemical formaldehyde removal composite air filtration system is provided, comprising a filter box and a circulating pipe component installed on the filter box, a side box cover with an air outlet is detachably connected to the upper side of the filter box, and an air inlet component is assembled to the lower side of the filter box; a filter component is arranged inside the filter box, the lower side of the filter component is a formaldehyde removal solvent reflux area, the air inlet component is inserted into the formaldehyde removal solvent reflux area, the upper side of the filter component is a purified gas discharge area, and the purified gas discharge area is in communication with the air outlet; the lower end of the circulating pipe component is inserted into the formaldehyde removal solvent reflux area, the upper end of the circulating pipe component is inserted into the filter component, and the formaldehyde removal solvent is sent into the formaldehyde removal solvent reflux area through the filter component.

[0007] Preferably, the filter component comprises a sliding frame, the sliding frame is slidingly fitted inside the filter box, the inner side of the sliding frame is fixedly connected with a filter screen one, a filter screen two and a filter screen three from top to bottom in sequence, and the filter screen one and the filter screen two form a high polymer composite activated carbon area for filling high polymer composite activated carbon.

[0008] As preferably, the circulating pipe component comprises a lifting drive assembly installed on the filter box, the lifting drive assembly is drivingly connected with the backflow box, the backflow port of the backflow box is connected with one end of the flexible hose through the cross pipe, the other end of the flexible hose is connected with the circulating pipe body with the circulating pump, the circulating pipe body is inserted into the formaldehyde removal solvent backflow area; the backflow box is fixed on the two sliding outflow pipes, the middle parts of the two sliding outflow pipes are relatively sealed and slide on the upper surface of the filter box, the lower ends of the two sliding outflow pipes are fixed in the pipe penetrating holes of the sliding frame, the bottom ends of the two sliding outflow pipes are both fixed with the outer ends of the flow guide cross pipes, the two flow guide cross pipes are relatively fixed in the circular holes on the two sides of the disc flow distribution box, the disc flow distribution box is located in the outflow area between the filter screen two and the filter screen three, and a plurality of outflow holes are uniformly arranged on the lower surface of the disc flow distribution box.

[0009] As preferably, the inner ends of the two flow guide cross pipes are respectively fixed with an arc-shaped elbow pipe, the two arc-shaped elbow pipes are oppositely arranged, and the two arc-shaped elbow pipes are both arranged towards the arc-shaped surface of the vortex impeller, the vortex impeller is fixed in the middle part of the central shaft, the central shaft is rotatably connected in the middle of the disc flow distribution box, a plurality of stirring rods are uniformly and circumferentially fixed on the shaft body penetrating out of the upper end of the disc flow distribution box, and the plurality of stirring rods are rotatably arranged in the high-molecular composite active carbon area, so as to stir the high-molecular composite active carbon filled in the high-molecular composite active carbon area.

[0010] As preferably, a plurality of cleaning brushes are uniformly and circumferentially fixed on the shaft body penetrating out of the lower end of the disc flow distribution box, and the plurality of cleaning brushes are slidably matched on the upper surface of the filter screen three.

[0011] As preferably, the lifting drive assembly comprises a motor installed on the filter box, one end of the motor is fixed with a rotating disc, and an eccentric shaft is fixed at the eccentric position of the other end of the rotating disc and slidably matched in the transverse slide way on the side of the filter box.

[0012] As preferably, the air inlet component comprises an air inlet box, the air inlet box is fixed in the air inlet below the side of the filter box, the outer end of the air inlet box is fixed with an air suction pipe with an air suction fan, the inner end of the air inlet box is fixed with a plurality of air supply pipes inserted into the formaldehyde removal solvent backflow area side by side, a plurality of primary filter plates are slidably matched in the air inlet box, the plurality of primary filter plates are fixed on a pulling cover, and the pulling cover is connected in the maintenance opening on the side of the air inlet box through bolts.

[0013] As preferably, the inner end of each of the plurality of air supply pipes is rotatably connected with a rotating pipe, the end of each of the plurality of rotating pipes away from the air supply pipe is provided with an arc-shaped curved air supply port, a belt pulley is fixed on each of the plurality of rotating pipes, the plurality of belt pulleys are connected through a synchronous belt, a gear is fixed on one of the rotating pipes, and the gear is engaged with a rack fixed below the sliding frame.

[0014] As preferably, the horizontal height of the rotating pipe is higher than the liquid level height of the formaldehyde removal solvent in the formaldehyde removal solvent backflow area.

[0015] The technical scheme provided by the embodiment of the present application can include the following beneficial effects:

[0016] The chemical formaldehyde removal composite air filtration system can effectively purify air, reduce formaldehyde in the air, and decompose formaldehyde by mixing and contacting the air with formaldehyde removal solvent when purifying the air; the formaldehyde decomposition effect is enhanced by the chemical reaction between the formaldehyde and the large amount of amino groups in the polymer material compounded on the activated carbon in the high polymer composite activated carbon area, and the byproduct is only water; finally, the harmful gases such as formaldehyde, VOCs (volatile organic compounds) and odor are removed by the activated carbon in the filtering component.

[0017] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application.

[0019] Figure 1 The first angle schematic view of the chemical formaldehyde removal composite air filtration system provided by the embodiment of the present application;

[0020] Figure 2 The second angle schematic view of the chemical formaldehyde removal composite air filtration system provided by the embodiment of the present application;

[0021] Figure 3 The cross-sectional view of the chemical formaldehyde removal composite air filtration system provided by the embodiment of the present application;

[0022] Figure 4 The local structure schematic view provided by the embodiment of the present application Figure 1 ;

[0023] Figure 5 The structure schematic view of the filter box provided by the embodiment of the present application;

[0024] Figure 6 The structure schematic view of the circulation pipe component provided by the embodiment of the present application;

[0025] Figure 7 The local structure schematic view of the circulation pipe component provided by the embodiment of the present application;

[0026] Figure 8 The structure schematic view of the air inlet component provided by the embodiment of the present application;

[0027] Figure 9A structural schematic diagram of the filter component provided for the embodiment of the present application is shown in the figure.

[0028] Figure 10 A structural schematic diagram of the lifting driving assembly provided for the embodiment of the present application is shown in the figure.

[0029] Figure 11 A structural schematic diagram of the backflow box provided for the embodiment of the present application is shown in the figure.

[0030] Figure 12 A local structural schematic diagram provided for the embodiment of the present application is shown in the figure. Figure 1

[0031] Figure 13 A principle schematic diagram of the imine polymer modified activated carbon for removing formaldehyde provided for the embodiment of the present application is shown in the figure.

[0032] Figure 14 A graph of the formaldehyde removal rate of the imine polymer modified activated carbon for removing formaldehyde provided for the embodiment of the present application changing with time is shown in the figure.

[0033] Figure 15 A schematic diagram of the sodium alginate hydrogel ball and the sodium alginate hydrogel ball grafted with polyethylene imine provided for the embodiment of the present application is shown in the figure.

[0034] Figure 16 A synthesis route diagram of the sodium alginate hydrogel ball grafted with polyethylene imine provided for the embodiment of the present application is shown in the figure.

[0035] Figure 17 A scanning electron micrograph of SA@PEI provided for the embodiment of the present application is shown in the figure.

[0036] Figure 18 An X-ray spectrogram of SA and SA@PEI provided for the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0037] ​The following description and drawings are illustrative of specific embodiments thereof and are not intended to limit the scope of the embodiments. Parts and features of some embodiments can be included or substituted in or for parts and features of other embodiments. The scope of the embodiments encompassed herein includes the whole scope of the claims together with all available equivalents of the claims. In this document, the terms "first", "second", etc. are used merely to distinguish one element from another, and do not require or imply any actual relationship or order between the elements. In fact, the first element can be referred to as the second element, and vice versa. Also, the terms "comprises", "comprising", or any other variations thereof are intended to cover a non-exclusive inclusion, such that a structure, device, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such structure, device, or apparatus. Without further limitation, an element defined by an "includes a" statement does not exclude the presence of additional identical elements in the structure, device, or apparatus that includes the element. Various embodiments are described in progressive stages, each of which focuses on the differences from other embodiments, and the same or similar parts between various embodiments can be referred to each other.

[0038] In this document, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are used only for the convenience of description and simplification of the description herein, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description herein, unless otherwise specified and limited, the terms "mount", "connect", "connection" should be interpreted broadly, for example, it can be a mechanical connection or an electrical connection, it can be a communication between two elements inside, it can be a direct connection or an indirect connection through an intermediate medium, and the specific meaning of the above terms can be understood by the person skilled in the art according to the specific circumstances.

[0039] In this document, the term "multiple" means two or more, unless otherwise specified.

[0040] In this document, the character " / " represents an "or" relationship between the objects before and after it. For example, A / B means A or B.

[0041] In this document, the term "and / or" is a description of the relationship between the objects, which means that there can be three relationships. For example, A and / or B means that there are three relationships of A or B, or A and B.

[0042] It should be understood that although the steps in the flowchart are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order constraint on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the diagram may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0043] The modules in the apparatus or system of this application can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0044] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0045] The following is in conjunction with the appendix Figures 1-18 The present invention will be described in further detail below.

[0046] Example 1

[0047] like Figures 1-18 As shown, this invention provides a chemical formaldehyde removal composite air filtration system, including a filter box 1 and a circulation pipe component 2 installed on the filter box 1. A side cover 3 with an air outlet is detachably connected to the upper side of the filter box 1, and an air inlet component 4 is installed at the lower side of the filter box 1. A filter component 5 is installed inside the filter box 1. Below the filter component 5 is a formaldehyde removal solvent return zone, and the air inlet component 4 is inserted into the formaldehyde removal solvent return zone. Above the filter component 5 is a purified gas discharge zone, which is connected to the air outlet. The lower end of the circulation pipe component 2 is inserted into the formaldehyde removal solvent return zone, and the upper end of the circulation pipe component 2 is inserted into the filter component 5, through which the formaldehyde removal solvent is sent into the formaldehyde removal solvent return zone.

[0048] The chemical formaldehyde removal composite air filtering system of the present application, when treating air, firstly starts the air inlet component 4, extracts air through the air inlet component 4 and preliminarily filters the air to capture large particles such as dust, hair and the like, so as to protect the subsequent filtering layer from being blocked by large particles, the air inlet component 4 can be provided with two, the two air inlet components 4 are oppositely arranged on the two sides of the filtering box 1, the gas enters into the formaldehyde removal solvent reflux area through the air inlet component 4, the formaldehyde removal solvent is injected into the filtering box 1 through the circulating pipe component 2, the formaldehyde removal solvent can be the conventional formaldehyde removal solvent purchased on the market, the formaldehyde removal solvent is dispersed through the filtering component 5 and then falls into the formaldehyde removal solvent reflux area, so that the air is mixed with the formaldehyde removal solvent to decompose formaldehyde; the gas is filtered through the filtering component 5 after rising and then enters into the purified gas discharge area and can be discharged through the air outlet of the side box cover 3.

[0049] The filtering component 5 comprises a sliding frame 501 which is slidably fitted on the four sides inside the filtering box 1, the inside of the sliding frame 501 is fixedly connected with a filter screen one 502, a filter screen two 503 and a filter screen three 504 from top to bottom in sequence, and a high polymer composite activated carbon area for loading high polymer composite activated carbon is formed between the filter screen one 502 and the filter screen two 503.

[0050] The filter holes of the filter screen one 502, the filter screen two 503 and the filter screen three 504 are increased in sequence, so as to facilitate the air to be filtered through the filter screen three 504, the filter screen two 503 and the filter screen one 502 in sequence when rising from right to left, a high polymer composite activated carbon area for loading high polymer composite activated carbon is formed between the filter screen one 502 and the filter screen two 503, the harmful gases such as formaldehyde, VOCs (volatile organic compounds) and odor can be removed through the high polymer composite activated carbon loaded in the high polymer composite activated carbon area, and the high polymer composite activated carbon area is located inside the side box cover 3, so as to facilitate opening the side box cover 3 to replace the high polymer composite activated carbon, and the practicability is high.

[0051] The high polymer composite activated carbon used in the present application can be imine polymer modified activated carbon.

[0052] The preparation method of the imine polymer modified activated carbon is as follows:

[0053] Step 1, 80g of high molecular imine polymer is dissolved in 2000ml of deionized water, and is stirred rapidly until dissolved to obtain a mixed solution;

[0054] Step 2, the pH value of the mixed solution is adjusted through concentrated hydrochloric acid, after the mixed solution is adjusted to weakly acidic, 500g of activated carbon is added, and is uniformly stirred for 24 hours, so that the high molecular imine polymer is adsorbed on the surface of the activated carbon as much as possible;

[0055] Step 3, filter out the compounded activated carbon, and place it in a forced air drying oven to dry, to prepare the imine polymer modified activated carbon.

[0056] The imine polymer modified activated carbon prepared in the application can effectively adsorb formaldehyde, and the principle of adsorbing formaldehyde is as follows:

[0057] The imine polymer modified activated carbon adsorbs formaldehyde by chemical adsorption technology, and during the adsorption treatment, formaldehyde and the amino group on the imine polymer modified activated carbon react to form an oxime bond (-C=N-), and no carbon dioxide is generated during the adsorption process, and the adsorption principle is shown in the schematic diagram as Figure 13

[0058] The test was completed in the Beijing Science and Technology Testing Technology Service Co., Ltd., and the air purifier used was model JH-1702. The test conditions were normal temperature conditions (about 25℃), the test cabin was 30m 3 , and the initial concentration of formaldehyde was 0.96mg / m 3 ;

[0059] Figure 14 The formaldehyde removal rate changes with time, as shown in the graph Figure 14 , the formaldehyde removal rate first increases and then slightly decreases with time, and when the adsorption time is 1h, the formaldehyde removal rate of the imine polymer modified activated carbon is the highest, reaching 98%; when the adsorption time is 12h, the formaldehyde removal rate can still reach 94%, effectively removing most of the formaldehyde, and the removal efficiency is high and the removal effect is good.

[0060] The high molecular composite activated carbon used in the application can also be a composite gel material, and the preparation method of the composite gel material is as follows:

[0061] Step 1, weigh 5.0g of sodium alginate into a beaker containing 400mL of deionized water, then place it under a magnetic stirrer to stir until completely dissolved, to obtain a sodium alginate solution;

[0062] Step 2, weigh 30.0g of anhydrous calcium chloride into a 1000mL beaker containing deionized water and stir until uniform to form a calcium chloride solution;

[0063] Step 3, pour the completely dissolved sodium alginate solution into a specific dropping bottle in batches, and drop the calcium chloride solution into it, and form a gel ball under the crosslinking action;

[0064] Step 4, stir the generated sodium alginate gel ball (SA) for 30min, and then wash the SA hydrogel ball with deionized water to remove the surface calcium ions and chloride ions, and finally obtain the SA adsorbent;

[0065] ​Step five, synthesis of polyethyleneimine (PEI) modified alginate composite gel beads (SA@PEI), 30 g of polyethyleneimine was dissolved in 500 mL of deionized water, stirring until completely dissolved; to the polyethyleneimine solution, the above SA gel beads were added, and the water bath was heated to about 70 degrees during stirring, and 5 g of ether was slowly added. After a period of reaction, PEI was grafted onto the surface of the SA gel beads to prepare composite gel beads.

[0066] As shown in Figure 15 , the left side is sodium alginate hydrogel beads, and the right side is sodium alginate hydrogel beads grafted with polyethyleneimine; Figure 16 is a synthesis route map of sodium alginate gel beads grafted with polyethyleneimine.

[0067] Figure 17 is a SEM image of sodium alginate gel beads grafted with polyethyleneimine. After grafting PEI, the surface of the gel beads is rougher. The rough surface and the pores of different diameters are interconnected, which can enhance the interaction between the adsorbent and the pollutant molecules, and can provide more adsorption sites. After functionalization of polyethyleneimine, SA@PEI presents a porous network structure, and the pore size size distribution is extensive, with some larger pore sizes. This may be due to the formation of more interaction forces in the SA@PEI composite, and the SA@PEI composite gel structure after grafting expands its surface and provides more exposed functional groups amino groups, which can play an important role in the transport and adsorption of target substances, such as the surface of SA / PEI composite gel beads after formaldehyde adsorption becomes uneven but the porous structure is intact Figure 17 c).

[0068] To study whether the SA gel beads are successfully modified, as shown in Figure 18 , by EDS analysis, it is observed that the element distribution of SA gel beads and SA@PEI composite gel beads is uniform. The analysis results show that SA gel beads are mainly composed of C, O, Cl, Ca and other elements, which are uniformly distributed on the surface and inside of the gel beads. After the modification of sodium alginate and polyethyleneimine, the SA@PEI gel beads not only retain the original C, O, Cl, Ca elements, but also add N element. This change is attributed to the large amount of primary and secondary amino groups in polyethyleneimine, thereby introducing new nitrogen element. This further confirms that PEI is successfully introduced into the surface of SA, and a cationic three-dimensional porous functional material is synthesized, which lays a good foundation for the later adsorption of formaldehyde.

[0069] Example two

[0070] As shown in Figures 1-18As shown, the circulating pipe component 2 comprises a lifting drive assembly 201 mounted on the filter box 1, the lifting drive assembly 201 is drivingly connected with a backflow box 202, a backflow opening of the backflow box 202 is connected with one end of an elastic hose 204 through a cross pipe 203, the other end of the elastic hose 204 is connected with a circulating pipe body 205 provided with a circulating pump, the circulating pipe body 205 is inserted into the formaldehyde removal solvent backflow area; the backflow box 202 is fixed on two sliding outflow pipes 206, the middle parts of the two sliding outflow pipes 206 are sealingly and slidably arranged on the upper surface of the filter box 1, the lower ends of the two sliding outflow pipes 206 are fixed in the pipe penetrating holes of a sliding frame 501, the bottom ends of the two sliding outflow pipes 206 are fixed with the outer ends of two flow guide cross pipes 213, the two flow guide cross pipes 213 are fixed in the circular holes on the two sides of a disc flow distribution box 207, the disc flow distribution box 207 is located in the outflow area between a second filter screen 503 and a third filter screen 504, and a plurality of outflow holes are uniformly arranged on the lower surface of the disc flow distribution box 207.

[0071] The circulating pipe component 2 can be used to add the formaldehyde removal solvent and also can make the formaldehyde removal solvent in the formaldehyde removal solvent backflow area flow circularly, and the formaldehyde removal solvent can be replaced according to actual conditions;

[0072] When the formaldehyde removal solvent is added for the first time, the formaldehyde removal solvent can be sent into the backflow box 202 through a feeding pipe on the top of the backflow box 202, the formaldehyde removal solvent in the backflow box 202 falls into the flow guide cross pipes 213 through the two sliding outflow pipes 206 and is transported into the disc flow distribution box 207 through the flow guide cross pipes 213, the formaldehyde removal solvent is distributed through the plurality of outflow holes on the lower surface of the disc flow distribution box 207, falls on the third filter screen 504 and falls through the plurality of filter holes on the third filter screen 504, the arrangement of the structure makes the falling formaldehyde removal solvent have better dispersivity and be better in contact with air, improves the reaction effect, and achieves better formaldehyde removal effect.

[0073] When the formaldehyde removal solvent in the formaldehyde removal solvent backflow area is made to flow circularly through the circulating pipe component 2, the circulating pump on the circulating pipe body 205 is opened, the formaldehyde removal solvent in the formaldehyde removal solvent backflow area is sucked into the circulating pipe body 205, the circulating pipe body 205 sends the formaldehyde removal solvent into the backflow box 202 through the elastic hose 204 and the cross pipe 203, and then the formaldehyde removal solvent falls again, which is convenient for fully utilizing the formaldehyde removal solvent.

[0074] Two arc-shaped elbows 208 are respectively fixed at the inner ends of the two flow guide cross pipes 213, the two arc-shaped elbows 208 face opposite directions, and both of the two arc-shaped elbows 208 face the arc-shaped surface of the vortex impeller 209. The vortex impeller 209 is fixed in the middle part of the central shaft 210, the central shaft 210 is rotationally connected to the middle part of the disc distributor 207, the central shaft 210 penetrates through the shaft body at the upper end of the disc distributor 207 and uniformly surrounds a plurality of stirring rods 211. The plurality of stirring rods 211 are rotationally arranged in the high-molecular composite activated carbon area, so as to stir the high-molecular composite activated carbon filled in the high-molecular composite activated carbon area. The central shaft 210 penetrates through the shaft body at the lower end of the disc distributor 207 and uniformly surrounds a plurality of cleaning brushes 212. The plurality of cleaning brushes 212 are slidingly fitted on the upper surface of the filter screen three 504.

[0075] The two arc-shaped elbows 208 are arranged towards the arc-shaped surface of the vortex impeller 209, so that when the formaldehyde removal solvent is sprayed into the disc distributor 207, a rotational flow is formed, and the vortex impeller 209 is driven to rotate. When the vortex impeller 209 rotates, the rotational flow effect is improved, and the central shaft 210 is driven to rotate. When the central shaft 210 rotates, the plurality of stirring rods 211 are driven, so that the plurality of stirring rods 211 stir the high-molecular composite activated carbon filled in the high-molecular composite activated carbon area, so as to improve the effect of the high-molecular composite activated carbon at different positions on air adsorption, and achieve better formaldehyde removal effect. When the central shaft 210 rotates, the plurality of cleaning brushes 212 are also synchronously driven to slide on the upper surface of the filter screen three 504, so as to clean the filter screen three 504, prevent the filter screen three 504 from being blocked to affect the filtering effect or the effect of spraying the formaldehyde removal solvent, and the plurality of cleaning brushes 212 can be rotated to make the formaldehyde removal solvent more uniformly dispersed on the filter screen three 504.

[0076] The lifting drive assembly 201 includes a motor mounted on the filter box 1. One end of the motor is fixed to a rotating disc, and the other end of the rotating disc is fixed to an eccentric shaft at an eccentric position. The eccentric shaft is slidingly fitted in the transverse slide of the reflux box 202. The motor can drive the rotating disc to rotate when started. The rotating disc can drive the eccentric shaft to rotate and move in a circle when rotating. The horizontal height of the eccentric shaft changes constantly when rotating and moving in a circle, so as to drive the reflux box 202 to move up and down through cooperation with the transverse slide. The reflux box 202 can drive the sliding frame 501 to move up and down through the two sliding outflow pipes 206 when moving up and down, so as to drive the filter component 5 to move and disturb the air within a certain range, thereby improving the filtering effect.

[0077] The air inlet component 4 comprises an air inlet box 401 fixed in the air inlet below the side of the filter box 1, an air suction pipe 402 with an air suction fan fixed at the outer end of the air inlet box 401, a plurality of air supply pipes 403 fixed side by side at the inner end of the air inlet box 401 and inserted into the formaldehyde removal solvent reflux area, and a plurality of primary filter plates slidably fitted in the air inlet box 401, which are fixed on a pull cover 404 connected to the access hole in the side of the air inlet box 401 by bolts.

[0078] After the air suction pipe 402 of the air suction fan sucks air into the air inlet box 401, the air is preliminarily filtered by the plurality of primary filter plates to capture large particles such as dust and hair, thereby protecting the subsequent filter layer from being blocked by large particles, and then the air is sent into the formaldehyde removal solvent reflux area through the air supply pipe 403 to mix and react with the formaldehyde removal solvent.

[0079] The inner end of each of the plurality of air supply pipes 403 is rotatably connected to a rotating pipe 405, the end of each of the plurality of rotating pipes 405 away from the air supply pipe 403 is provided with an arc-shaped curved air supply port 406, a belt pulley 407 is fixed on each of the plurality of rotating pipes 405, the plurality of belt pulleys 407 are connected by a synchronous belt 408, a gear 409 is fixed on one of the rotating pipes 405, and the gear 409 is engaged with a rack 410 fixed below a sliding frame 501.

[0080] The sliding frame 501 moves up and down to drive the rack 410 to move up and down, the rack 410 changes the contact position with the gear 409 when moving, thereby driving the gear 409 to rotate, the gear 409 drives one of the rotating pipes 405 to rotate when rotating, the rotating pipe 405 drives the belt pulleys 407 on the plurality of rotating pipes 405 to rotate through the synchronous belt 408 when rotating, thereby driving the plurality of rotating pipes 405 to rotate, and the air is sent into different positions through the rotation of the plurality of arc-shaped curved air supply ports 406, and a rotational flow is formed to improve the mixing effect.

[0081] The horizontal height of the rotating pipe 405 is higher than the liquid level of the formaldehyde removal solvent in the formaldehyde removal solvent reflux area.

[0082] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be referred to each other.

Claims

1. A chemical formaldehyde removal composite air filtration system, characterized in that, The filter box (1) includes a filter box (1) and a circulation pipe component (2) installed on the filter box (1). A side cover (3) with an air outlet is detachably connected to the upper side of the filter box (1). An air inlet component (4) is installed on the lower side of the filter box (1). A filter component (5) is installed inside the filter box (1). The lower part of the filter component (5) is a formaldehyde removal solvent return zone. The air inlet component (4) is inserted into the formaldehyde removal solvent return zone. The upper part of the filter component (5) is a purified gas discharge zone, which is connected to the air outlet. The lower end of the circulation pipe component (2) is inserted into the formaldehyde removal solvent return zone, and the upper end of the circulation pipe component (2) is inserted into the filter component (5). The formaldehyde removal solvent is sent into the formaldehyde removal solvent return zone through the filter component (5). The filter component (5) includes a sliding frame (501), which is slidably fitted inside the filter box (1). The inner side of the sliding frame (501) is fixedly connected from top to bottom to filter screen one (502), filter screen two (503) and filter screen three (504). A polymer composite activated carbon zone for filling polymer composite activated carbon is formed between filter screen one (502) and filter screen two (503). The polymeric composite activated carbon is an imine polymer-modified activated carbon; The preparation method of the imine polymer modified activated carbon is as follows: Step 1: Weigh 80g of the high molecular weight imine polymer and dissolve it in 2000mL of deionized water. Stir rapidly until dissolved to obtain a mixed solution. Step 2: Adjust the pH of the mixed solution with concentrated hydrochloric acid. After the mixed solution is adjusted to be weakly acidic, add 500g of activated carbon and stir at a constant speed for 24 hours to allow the high molecular weight imine polymer to be adsorbed onto the surface of the activated carbon as much as possible. Step 3: Filter out the composite activated carbon and dry it in a forced-air drying oven to prepare imine polymer modified activated carbon; The circulation pipe component (2) includes a lifting drive assembly (201) installed on the filter box (1). The lifting drive assembly (201) is connected to the return box (202). The return port of the return box (202) is connected to one end of the telescopic hose (204) through a horizontal pipe (203). The other end of the telescopic hose (204) is connected to the circulation pipe body (205) with a circulation pump. The circulation pipe body (205) is inserted into the formaldehyde removal solvent return zone. The return box (202) is fixed on two sliding outlet pipes (206). The middle part of the tube (206) is relatively sealed and slides on the upper surface of the filter box (1). The lower ends of the two sliding outflow tubes (206) are fixed in the through holes of the sliding frame (501). The bottom ends of the two sliding outflow tubes (206) are fixed to the outer ends of the guide horizontal tubes (213). The two guide horizontal tubes (213) are relatively fixed in the round holes on both sides of the disc diversion box (207). The disc diversion box (207) is located in the drainage area between the second filter screen (503) and the third filter screen (504). Multiple drainage holes are evenly arranged on the lower surface of the disc diversion box (207).

2. The chemical formaldehyde removal composite air filtration system according to claim 1, characterized in that, An arc-shaped bend (208) is fixed to the inner end of each of the two guide tubes (213). The two arc-shaped bends (208) face opposite directions and are both set towards the arc surface of the vortex impeller (209). The vortex impeller (209) is fixed in the middle of the central shaft (210). The central shaft (210) is rotatably connected to the middle of the disc diversion box (207). The central shaft (210) extends out to the shaft at the upper end of the disc diversion box (207) and a plurality of stirring rods (211) are evenly fixed around it. The plurality of stirring rods (211) are rotatably set in the polymer composite activated carbon zone to stir the polymer composite activated carbon filled in the polymer composite activated carbon zone.

3. The chemical formaldehyde removal composite air filtration system according to claim 2, characterized in that, A central shaft (210) extends through to the shaft at the lower end of the disc diverter box (207) and a plurality of cleaning brushes (212) are evenly fixed around it. The plurality of cleaning brushes (212) slide and fit on the upper surface of the filter screen (504).

4. The chemical formaldehyde removal composite air filtration system according to claim 2, characterized in that, The lifting drive assembly (201) includes a motor installed on the filter box (1), with one end of the rotating disk fixed at the output end of the motor, and an eccentric shaft fixed at the eccentric position of the other end of the rotating disk. The eccentric shaft is slidably fitted in the transverse slide rail on the side of the return box (202).

5. The chemical formaldehyde removal composite air filtration system according to claim 2, characterized in that, The air intake component (4) includes an air intake box (401), which is fixed in the air inlet below the side of the filter box (1). An exhaust pipe (402) with an exhaust fan is fixed at the outer end of the air intake box (401), and multiple air supply pipes (403) inserted into the formaldehyde removal solvent return zone are fixed side by side at the inner end of the air intake box (401).

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