Device for removing formic acid from high-concentration formaldehyde solution

Abstract

The utility model discloses a high-concentration formaldehyde solution formic acid removal device which comprises a treatment box, a T-shaped partition plate is fixedly connected to an inner cavity of the treatment box, flow guide holes are formed in the two ends of the top of the T-shaped partition plate, and resin beds are fixedly installed between the lower ends of the two sides of the T-shaped partition plate and the middle ends of the two sides of the inner cavity of the treatment box. A fixing plate is fixedly connected to the left end of the top of the outer surface of the treatment box, and a driving motor is fixedly mounted at the lower end of the left side of the fixing plate. Through the arrangement of the T-shaped partition plate, the two groups of resin beds in the treatment box can be effectively separated, so that a high-concentration formaldehyde solution flowing through the interior of the treatment box can respectively pass through the interiors of the resin beds after being shunted by the two groups of flow guide holes; formic acid contained in the high-concentration formaldehyde solution can be effectively adsorbed by the resin bed, so that the effect of removing the formic acid in the high-concentration formaldehyde solution is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-concentration formaldehyde solution preparation, in particular to a device for removing formic acid from a high-concentration formaldehyde solution. Background Art

[0002] Formaldehyde, also known as formic aldehyde, is an organic compound with the chemical formula HCHO or CH2O and a molecular weight of 30.03. It is a colorless, irritating gas that is irritating to the human eyes, nose, etc. It is easily soluble in water and ethanol. The concentration of the aqueous solution can be as high as 55%, generally 35%-40%, and usually 37%. It is called formaldehyde water, commonly known as formalin. Formaldehyde has very active chemical properties and is easily reduced to methanol under the catalysis of metals or metal oxides; formic acid or carbon dioxide and water can be generated when oxidized. Formaldehyde is a strong reducing agent and its reducing properties are stronger in trace alkalinity. It can be slowly oxidized to formic acid in the air. Therefore, in order to obtain a higher purity formaldehyde solution, it is necessary to remove the formic acid produced in the formaldehyde solution.

[0003] At present, in the process of preparing high-concentration formaldehyde solution, the ion exchange resin method is usually used to remove the formic acid inside. During operation, when the formic acid solution passes through the resin bed, the formic acid molecules interact with the ionic groups in the resin and are adsorbed on the resin, thereby achieving the purpose of removing the formic acid in the high-concentration formaldehyde solution. Since the resin bed often becomes saturated due to adsorption during long-term use, personnel need to replace it regularly. At the same time, since the replacement process often takes a long time, the formic acid removal work needs to be stopped and waited, which affects the normal preparation of the high-concentration formaldehyde solution. Utility Model Content

[0004] The purpose of the utility model is to provide a device for removing formic acid from a high-concentration formaldehyde solution, which has the advantages of being able to remove formic acid from the high-concentration formaldehyde solution and allowing personnel to replace the resin bed without affecting the preparation process of the high-concentration formaldehyde solution.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for removing formic acid from a high-concentration formaldehyde solution, comprising a treatment box, wherein the inner cavity of the treatment box is fixedly connected to a T-shaped partition, both ends of the top of the T-shaped partition are provided with guide holes, and resin beds are fixedly installed between the lower ends of both sides of the T-shaped partition and the middle ends of both sides of the inner cavity of the treatment box, the left end of the top of the outer surface of the treatment box is fixedly connected to a fixed plate, the lower end of the left side of the fixed plate is fixedly installed with a driving motor, the output end of the driving motor is fixedly installed with a screw, both ends of the screw are threadedly connected to push plates, the upper ends of the two push plates close to each other are movably connected to a movable frame, and the lower end of the movable frame The end is fixedly connected to a connecting rod, the surface of the connecting rod is movably connected to the upper end of the processing box, the two connecting rods are fixedly connected to a sealing baffle on one side close to each other, the top of the sealing baffle is movably connected to the upper end of the T-shaped partition, the top of the sealing baffle is provided with an air groove, the upper end of the air groove is fixedly connected to an elastic sealing gasket, the surface of the sealing baffle and located below the air groove is fixedly connected to an air guide pipe, the lower end of the air guide pipe is fixedly connected to an air guide cylinder between the middle end of the sealing baffle, a push rod is movably connected between the surface of the air guide cylinder and the surface of the sealing baffle, the surface of the push rod is fixedly connected to a piston, and the surface of the piston is movably connected to the inner cavity of the air guide cylinder.

[0006] As a preferred solution, the right end of the top of the outer surface of the processing box is fixedly connected to a support plate, the right side of the screw is movably connected to the lower end of the left side of the support plate through a bearing, a guide slide is fixedly connected between the upper end of the left side of the support plate and the upper end of the right side of the fixed plate, the upper end of the push plate is movably connected to the surface of the guide slide, the upper end of the movable frame is movably connected to the surface of the guide slide, and a second spring is fixedly connected between the middle end of the movable frame and the upper end of the outer surface of the processing box.

[0007] As a preferred solution, a liquid inlet pipe is fixedly connected to the middle end of the top of the processing box, discharge valves are fixedly installed at both ends of the bottom of the processing box, a discharge pipe is fixedly installed between the bottoms of the two discharge valves, and inspection plates are fixedly installed at both ends of the front surface of the processing box by bolts.

[0008] As a preferred solution, the upper ends of both sides of the processing box are fixedly connected with first sealing rings, and the surface of the connecting rod is movably connected to the surface of the first sealing ring.

[0009] As a preferred solution, support cross bars are fixedly connected between the upper ends of both sides of the processing box cavity and the upper ends of both sides of the T-shaped partition. There are four support cross bars, and the surface of the sealing baffle is movably connected to the surface of the support cross bars.

[0010] As a preferred solution, pillars are fixedly connected around the lower end of the outer surface of the processing box, and a bottom plate is fixedly connected between the bottoms of the four pillars.

[0011] As a preferred solution, a first spring is fixedly connected between the surface of the piston and the inner cavity of the gas cylinder, a second sealing ring is fixedly connected to the middle end of the piston, and the surface of the second sealing ring is movably connected to the inner cavity of the gas cylinder.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] 0. The utility model can effectively separate the two groups of resin beds inside the treatment box by setting a T-shaped partition, so that the high-concentration formaldehyde solution flowing through the treatment box can be diverted through the two groups of guide holes and pass through the inside of the resin beds respectively, so that the formic acid contained in the high-concentration formaldehyde solution can be effectively adsorbed by the resin beds, thereby achieving the effect of removing the formic acid in the high-concentration formaldehyde solution. Through the arrangement of the driving motor, screw, push plate, movable frame, connecting rod, sealing baffle, push rod, piston, air guide cylinder, air guide tube, air groove and elastic sealing gasket, the guide holes above the resin bed that needs to be replaced can be effectively sealed during the later maintenance process, so that personnel can replace the resin bed while the high-concentration formaldehyde solution can remove formic acid through the other resin bed, thereby ensuring that the preparation of the high-concentration formaldehyde solution can operate normally.

[0014] 1. The utility model achieves the purpose of supporting the right side of the screw by setting the support plate, thereby preventing the screw from tilting due to force. The utility model achieves the purpose of guiding the push plate and the mobile frame by setting the guide slide bar, thereby preventing the push plate and the mobile frame from tilting and deviating during the movement. The utility model achieves the purpose of guiding the push plate and the mobile frame by setting the second spring, thereby preventing the push plate and the mobile frame from tilting and deviating during the movement. The utility model can compress the second spring during the movement of the mobile frame, thereby enabling the second spring to generate tension on the mobile frame, so as to facilitate the subsequent pushing of the mobile frame to move and reset. The utility model can facilitate the filling and discharge of high-concentration formaldehyde solution inside the treatment box by setting the liquid inlet pipe, the discharge valve and the discharge pipe. The utility model can facilitate the filling and discharge of high-concentration formaldehyde solution inside the treatment box by setting the inspection plate. Maintenance work is carried out inside the box. Through the provision of the first sealing ring, the sealing performance of the contact between the connecting rod and the processing box is effectively improved. Through the provision of the supporting cross bar, the purpose of supporting and guiding the sealing baffle is achieved, and the sealing baffle is prevented from tilting due to force. Through the provision of the pillar and the bottom plate, the purpose of supporting the whole is achieved. Through the provision of the first spring, the first spring can be compressed during the movement of the piston, and the first spring can generate tension on the piston, so that after the subsequent push rod is disengaged from the T-shaped partition, the first spring can push the piston to reset. Through the provision of the second sealing ring, the sealing performance of the contact between the piston and the air guide cylinder is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a three-dimensional diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the front cross-sectional structure of the processing box of the utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the processing box of the utility model when viewed from above;

[0018] Figure 4 This is a front sectional structural diagram of the sealing baffle of the present invention.

[0019] In the figure: 1. processing box; 2. connecting rod; 3. movable frame; 4. driving motor; 5. fixed plate; 6. guide slide; 7. push plate; 8. screw; 9. support plate; 10. liquid inlet pipe; 11. inspection plate; 12. bottom plate; 13. support; 14. discharge valve; 15. discharge pipe; 16. resin bed; 17. first sealing ring; 18. sealing baffle; 19. T-shaped partition; 20. guide hole; 21. push rod; 22. supporting cross bar; 23. piston; 24. second sealing ring; 25. air guide cylinder; 26. first spring; 27. air guide pipe; 28. air groove; 29. ​​elastic sealing pad; 30. second spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0022] Example 1:

[0023] See also Figure 1-Figure 4As shown, the utility model provides a device for removing formic acid from a high-concentration formaldehyde solution, including a treatment box 1, an inner cavity of the treatment box 1 is fixedly connected to a T-shaped partition 19, both ends of the top of the T-shaped partition 19 are provided with guide holes 20, and resin beds 16 are fixedly installed between the lower ends of both sides of the T-shaped partition 19 and the middle ends of both sides of the inner cavity of the treatment box 1, the left end of the top of the outer surface of the treatment box 1 is fixedly connected to a fixed plate 5, the lower end of the left side of the fixed plate 5 is fixedly installed with a drive motor 4, the output end of the drive motor 4 is fixedly installed with a screw 8, both ends of the screw 8 are threadedly connected to push plates 7, the upper ends of the two push plates 7 close to each other are movably connected to a movable frame 3, the lower end of the movable frame 3 is fixedly connected to a connecting rod 2, and the connecting rod 2 The surface is movably connected to the upper end of the processing box 1, and the side where the two connecting rods 2 are close to each other is fixedly connected to the sealing baffle 18, and the top of the sealing baffle 18 is movably connected to the upper end of the T-shaped partition 19. An air groove 28 is provided on the top of the sealing baffle 18, and an elastic sealing gasket 29 is fixedly connected to the upper end of the air groove 28. An air guide pipe 27 is fixedly connected to the surface of the sealing baffle 18 and located below the air groove 28. An air guide cylinder 25 is fixedly connected between the lower end of the air guide pipe 27 and the middle end of the sealing baffle 18. A push rod 21 is movably connected between the surface of the air guide cylinder 25 and the surface of the sealing baffle 18. A piston 23 is fixedly connected to the surface of the push rod 21, and the surface of the piston 23 is movably connected to the inner cavity of the air guide cylinder 25.

[0024] In the present technical solution, the two groups of resin beds 16 inside the treatment box 1 can be effectively separated by the arrangement of the T-shaped partition 19, so that the high-concentration formaldehyde solution flowing through the treatment box 1 can be diverted through the two groups of guide holes 20 and pass through the inside of the resin bed 16 respectively, so that the formic acid contained in the high-concentration formaldehyde solution can be effectively adsorbed by the resin bed 16, thereby achieving the effect of removing formic acid in the high-concentration formaldehyde solution. By driving the motor 4, the screw 8, the push plate 7, the movable frame 3, the connecting rod 2, the sealing baffle 18, the push rod 21, the piston 23, the air guide cylinder 25, the air guide pipe 27, the air groove 28 and the elastic sealing gasket 29, the guide holes 20 above the resin bed 16 that needs to be replaced can be effectively sealed during the later maintenance process, so that the personnel can replace the resin bed 16 while the high-concentration formaldehyde solution can remove formic acid through the other resin bed 16, thereby ensuring that the preparation work of the high-concentration formaldehyde solution can operate normally.

[0025] Example 2:

[0026] On the basis of embodiment 1, the present invention is as follows Figure 1-Figure 4As shown, it is disclosed that the right end of the top of the outer surface of the processing box 1 is fixedly connected to a support plate 9, the right side of the screw 8 is movably connected to the lower end of the left side of the support plate 9 through a bearing, a guide slide 6 is fixedly connected between the upper end of the left side of the support plate 9 and the upper end of the right side of the fixed plate 5, the upper end of the push plate 7 is movably connected to the surface of the guide slide 6, the upper end of the movable frame 3 is movably connected to the surface of the guide slide 6, the middle end of the movable frame 3 and the upper end of the outer surface of the processing box 1 are fixedly connected with a second spring 30, the middle end of the top of the processing box 1 is fixedly connected to a liquid inlet pipe 10, both ends of the bottom of the processing box 1 are fixedly installed with a discharge valve 14, a discharge pipe 15 is fixedly installed between the bottoms of the two discharge valves 14, and both ends of the front surface of the processing box 1 are fixedly installed with inspection Repair plate 11, the upper ends of both sides of the processing box 1 are fixedly connected with the first sealing ring 17, the surface of the connecting rod 2 is movably connected to the surface of the first sealing ring 17, and the upper ends of both sides of the inner cavity of the processing box 1 and the upper ends of both sides of the T-shaped partition 19 are fixedly connected with supporting cross bars 22. There are four supporting cross bars 22, and the surface of the sealing baffle 18 is movably connected to the surface of the supporting cross bars 22. The lower end of the outer surface of the processing box 1 is fixedly connected with pillars 13 all around, and the bottom of the four pillars 13 is fixedly connected with the bottom plate 12. The surface of the piston 23 and the inner cavity of the air guide cylinder 25 are fixedly connected with a first spring 26. The middle end of the piston 23 is fixedly connected with a second sealing ring 24, and the surface of the second sealing ring 24 is movably connected to the inner cavity of the air guide cylinder 25.

[0027] In the present technical solution, the purpose of supporting the right side of the screw rod 8 is achieved by setting the support plate 9, thereby preventing the screw rod 8 from tilting due to the force. The purpose of guiding the push plate 7 and the movable frame 3 is achieved by setting the guide slide bar 6, thereby preventing the push plate 7 and the movable frame 3 from tilting and offsetting during the movement. The second spring 30 is set to compress the second spring 30 during the movement of the movable frame 3, so that the second spring 30 can generate tension on the movable frame 3, so as to facilitate the subsequent pushing of the movable frame 3 to move and reset. The liquid inlet pipe 10, the discharge valve 14 and the discharge pipe 15 are set to facilitate personnel to fill and discharge the high-concentration formaldehyde solution inside the treatment box 1. The maintenance plate 11 is set to facilitate personnel to check the inside of the treatment box 1. Maintenance work, through the setting of the first sealing ring 17, the sealing of the contact between the connecting rod 2 and the processing box 1 is effectively improved, and through the setting of the supporting cross bar 22, the purpose of supporting and guiding the sealing baffle 18 is achieved, so as to prevent the sealing baffle 18 from tilting due to force. Through the setting of the pillar 13 and the bottom plate 12, the purpose of supporting the whole is achieved. Through the setting of the first spring 26, the first spring 26 can be compressed during the movement of the piston 23, so that the first spring 26 can generate tension on the piston 23, so that after the subsequent push rod 21 is disengaged from the T-shaped partition 19, the first spring 26 can push the piston 23 to reset. Through the setting of the second sealing ring 24, the sealing of the contact between the piston 23 and the air guide cylinder 25 is effectively improved.

[0028] The working principle of the present invention is as follows: by setting the T-shaped partition 19, the two groups of resin beds 16 inside the treatment box 1 can be effectively separated, so that the high-concentration formaldehyde solution flowing through the treatment box 1 can be diverted through the two groups of guide holes 20 and pass through the inside of the resin bed 16 respectively, so that the formic acid contained in the high-concentration formaldehyde solution can be effectively adsorbed by the resin bed 16, thereby achieving the effect of removing the formic acid in the high-concentration formaldehyde solution, and when it is necessary to replace the resin bed 16, the screw 8 can be driven to rotate by starting the drive motor 4, and the screw 8 rotates and drives the push plate 7 to move. The movement of the push plate 7 can push the movable frame 3 above the resin bed 16 to be replaced to move, and the movement of the movable frame 3 can drive the connecting rod 2 and the sealing baffle 18 to move, and the movement of the sealing baffle 18 can drive the push rod 21 to move. The push rod 21 moves so that it can contact the surface of the T-shaped partition 19, and under the action of the continuous movement of the sealing baffle 18, the push rod 21 can drive the piston 23 to compress the air inside the air guide cylinder 25, so that the air can be input into the interior of the air groove 28 through the air guide pipe 27 under the action of compression, and the volume of the elastic sealing gasket 29 can be expanded under the action of the air input, and it can be tightly attached to the surface of the T-shaped partition 19, until the sealing baffle 18 can be located below the corresponding guide hole 20 under the action of movement, and the guide hole 20 above the resin bed 16 that needs to be replaced can be effectively sealed between the sealing baffle 18 and the elastic sealing gasket 29, so that the personnel can replace the resin bed 16 while the high-concentration formaldehyde solution can be removed by formic acid through another resin bed 16, thereby ensuring that the preparation of the high-concentration formaldehyde solution can operate normally.

[0029] It is important to note that the configuration and arrangement of the present application, as shown in various exemplary embodiments, are illustrative only. Although only a few embodiments are described in detail in this disclosure, those reading this disclosure will readily appreciate that numerous modifications are possible (e.g., variations in the size, dimensions, structure, shape, and proportions of various components, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, components shown as integrally formed may be constructed from multiple parts or components, the positions of components may be inverted or otherwise altered, and the nature, number, or position of discrete components may be modified or changed. Therefore, all such modifications are intended to be encompassed within the scope of this invention. The order or sequence of any process or method steps may be altered or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover structures described herein that perform the function described, and not only structural equivalence but also equivalent structures. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0030] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the scope of protection of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A device for removing formic acid from a high-concentration formaldehyde solution, comprising a treatment box (1), characterized in that: The inner cavity of the processing box (1) is fixedly connected with a T-shaped partition (19), and both ends of the top of the T-shaped partition (19) are provided with guide holes (20), and resin beds (16) are fixedly installed between the lower ends of both sides of the T-shaped partition (19) and the middle ends of both sides of the inner cavity of the processing box (1), and the left end of the top of the outer surface of the processing box (1) is fixedly connected with a fixed plate (5), and the lower end of the left side of the fixed plate (5) is fixedly installed with a driving motor (4), and the output end of the driving motor (4) is fixedly installed with a screw (8), and both ends of the screw (8) are threadedly connected with push plates (7), and the upper ends of the two push plates (7) close to each other are movably connected to a movable frame (3), and the lower end of the movable frame (3) is fixedly connected with a connecting rod (2), and the surface of the connecting rod (2) is movably connected to the upper end of the processing box (1). The two connecting rods (2) are fixedly connected to a sealing baffle (18) on one side close to each other, and the top of the sealing baffle (18) is movably connected to the upper end of the T-shaped partition (19). The top of the sealing baffle (18) is provided with an air groove (28), and the upper end of the air groove (28) is fixedly connected to an elastic sealing gasket (29). The surface of the sealing baffle (18) and located below the air groove (28) is fixedly connected to an air guide tube (27), and an air guide cylinder (25) is fixedly connected between the lower end of the air guide tube (27) and the middle end of the sealing baffle (18). A push rod (21) is movably connected between the surface of the air guide cylinder (25) and the surface of the sealing baffle (18). The surface of the push rod (21) is fixedly connected to a piston (23), and the surface of the piston (23) is movably connected to the inner cavity of the air guide cylinder (25).

2. The device for removing formic acid from a high-concentration formaldehyde solution according to claim 1, characterized in that: The right end of the top of the outer surface of the processing box (1) is fixedly connected to a support plate (9), the right side of the screw rod (8) is movably connected to the lower end of the left side of the support plate (9) through a bearing, a guide slide bar (6) is fixedly connected between the upper end of the left side of the support plate (9) and the upper end of the right side of the fixed plate (5), the upper end of the push plate (7) is movably connected to the surface of the guide slide bar (6), the upper end of the movable frame (3) is movably connected to the surface of the guide slide bar (6), and a second spring (30) is fixedly connected between the middle end of the movable frame (3) and the upper end of the outer surface of the processing box (1).

3. The device for removing formic acid from a high-concentration formaldehyde solution according to claim 1, wherein: A liquid inlet pipe (10) is fixedly connected to the middle end of the top of the processing box (1), a discharge valve (14) is fixedly installed at both ends of the bottom of the processing box (1), a discharge pipe (15) is fixedly installed between the bottoms of the two discharge valves (14), and an inspection plate (11) is fixedly installed at both ends of the front surface of the processing box (1) by bolts.

4. The device for removing formic acid from a high-concentration formaldehyde solution according to claim 1, wherein: The upper ends of both sides of the processing box (1) are fixedly connected to a first sealing ring (17), and the surface of the connecting rod (2) is movably connected to the surface of the first sealing ring (17).

5. The device for removing formic acid from a high-concentration formaldehyde solution according to claim 1, characterized in that: Support cross bars (22) are fixedly connected between the upper ends of both sides of the inner cavity of the processing box (1) and the upper ends of both sides of the T-shaped partition (19). The number of the support cross bars (22) is four, and the surface of the sealing baffle (18) is movably connected to the surface of the support cross bars (22).

6. The device for removing formic acid from a high-concentration formaldehyde solution according to claim 1, characterized in that: Supports (13) are fixedly connected to the four sides of the lower end of the outer surface of the processing box (1), and a bottom plate (12) is fixedly connected between the bottoms of the four supports (13).

7. The device for removing formic acid from a high-concentration formaldehyde solution according to claim 1, characterized in that: A first spring (26) is fixedly connected between the surface of the piston (23) and the inner cavity of the gas guide cylinder (25), a second sealing ring (24) is fixedly connected to the middle end of the piston (23), and the surface of the second sealing ring (24) is movably connected to the inner cavity of the gas guide cylinder (25).

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