Device for removing volatile organic compounds in raw materials

Abstract

The utility model discloses a device for removing volatile organic compounds in raw materials, which comprises a dissolving tank, a first liquid outlet capable of being opened and closed is arranged at the bottom of the dissolving tank, and the dissolving tank is configured to dissolve the raw materials; a liquid inlet and a second liquid outlet are formed in the aeration tank, the liquid inlet is connected with the first liquid outlet, an aeration pipeline is arranged in the aeration tank, an air inlet is formed in one end of the aeration pipeline, and a plurality of aeration holes are formed in the aeration pipeline; the air supply mechanism is connected with the air inlet of the aeration pipeline, and the air supply mechanism is configured to supply air into the aeration pipeline for aeration; the first exhaust pipeline is communicated with the inside of the aeration tank, and the first exhaust pipeline is configured to discharge volatile organic compounds escaping from the raw material solution in the aeration tank. According to the device, volatile organic impurities in maleic anhydride can be thoroughly removed, and the preparation quality of glyoxylic acid is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of material preparation equipment, and in particular relates to a device for removing volatile organic matter in raw materials. Background Art

[0002] When glyoxylic acid is produced by the ozone oxidation of maleic anhydride method, maleic anhydride is used as the raw material. Maleic anhydride is first hydrolyzed and then oxidized with ozone. Maleic anhydride is usually prepared by oxidation with n-butane, which contains a small amount of impurities that are difficult to dissolve in water, which will affect the quality of the finished glyoxylic acid.

[0003] At present, for impurities that are poorly soluble in water, the impurities are usually dispersed by stirring in the hydrolysis solution of maleic anhydride. However, this method is not thorough enough to remove impurities in maleic anhydride, which will affect the subsequent oxidation reaction and reduce the quality of the glyoxylic acid product.

[0004] In view of this, how to design a more thorough technology for removing impurities in maleic anhydride so as to improve the quality of glyoxylic acid products is a technical problem to be solved by the utility model. Utility Model Content

[0005] The utility model aims to provide a device for removing volatile organic matter in raw materials, so as to completely remove the volatile organic impurities in the raw materials during the preparation of glyoxylic acid and thus improve the product quality of the prepared glyoxylic acid.

[0006] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0007] A device for removing volatile organic matter from raw materials, comprising:

[0008] A dissolving tank, the bottom of which is provided with a switchable first liquid outlet, and the dissolving tank is configured to dissolve the raw material;

[0009] An aeration tank, on which a liquid inlet and a second liquid outlet are provided, the liquid inlet is connected to the first liquid outlet, an aeration pipe is provided in the aeration tank, one end of the aeration pipe is an air inlet, and the aeration pipe is provided with a plurality of aeration holes;

[0010] an air supply mechanism connected to the air inlet of the aeration pipeline, the air supply mechanism being configured to supply gas into the aeration pipeline for aeration;

[0011] A first exhaust pipe is communicated with the interior of the aeration tank, and the first exhaust pipe is configured to exhaust volatile organic matter escaping from the raw material solution in the aeration tank.

[0012] In some embodiments of the present application, a stirring mechanism is provided in the dissolving tank, and the stirring mechanism is configured to stir and dissolve the raw materials and allow volatile organic matter in the raw materials to escape from the solution.

[0013] In some embodiments of the present application, the stirring mechanism includes a motor, a stirring rod and multiple groups of stirring blades. The motor is arranged on the dissolution tank, the stirring rod is arranged inside the dissolution tank and connected to the motor, and the multiple groups of stirring blades are arranged on the stirring rod from top to bottom.

[0014] In some embodiments of the present application, a cutting hole is provided on the stirring blade.

[0015] In some embodiments of the present application, the device for removing volatile organic compounds from the raw material includes a second exhaust pipe, which is connected to the interior of the dissolution tank, and the second exhaust pipe is configured to discharge volatile organic compounds escaping from the raw material solution in the dissolution tank.

[0016] In some embodiments of the present application, the device for removing volatile organic compounds in the raw material further includes a tail gas absorption tower, and the tail gas absorption tower is connected to the first exhaust pipe and the second exhaust pipe respectively.

[0017] In some embodiments of the present application, both the first exhaust duct and the second exhaust duct are provided with induced draft fans.

[0018] In some embodiments of the present application, the aeration pipe is a serpentine structure.

[0019] In some embodiments of the present application, the first exhaust pipe includes a main pipe and a plurality of branch pipes, one end of the branch pipe is connected to the aeration tank, and the other end of the branch pipe is connected to the main pipe.

[0020] In some embodiments of the present application, the air supply mechanism is an air compressor.

[0021] Compared with the prior art, the advantages and positive effects of the utility model are as follows: by setting a dissolving tank, the raw material is dissolved in pure water to obtain a raw material solution, and then the raw material solution containing volatile organic impurities first enters the aeration tank, the aeration pipeline in the aeration tank is supplied with air by the air supply mechanism, and the volatile organic impurities in the raw material solution are taken away by aeration, and the volatile organic impurities are discharged through the first exhaust pipe, and the raw material solution with the volatile organic impurities removed flows out of the aeration tank and enters the storage tank, which can be used for the subsequent preparation of glyoxylic acid; the utility model can completely remove the volatile organic impurities in the raw material, so as to obtain high-quality glyoxylic acid in the subsequent preparation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 A schematic diagram of the structure of an embodiment of a device for removing volatile organic compounds from raw materials according to the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of a dissolving tank in an embodiment of a device for removing volatile organic compounds from raw materials according to the utility model;

[0025] Figure 3 for Figure 2 Schematic diagram of the structure of the stirring blade;

[0026] Figure 4 It is a top cross-sectional view of an aeration tank in one embodiment of the device for removing volatile organic compounds in raw materials according to the utility model.

[0027] Description of reference numerals:

[0028] 100, dissolving tank; 101, first liquid outlet; 102, motor; 103, stirring rod; 104, stirring blade; 105, cutting hole;

[0029] 200, aeration tank; 201, liquid inlet; 202, second liquid outlet; 203, aeration pipeline; 204, aeration hole;

[0030] 300. Gas supply mechanism;

[0031] 400, a first exhaust duct;

[0032] 500. Tail gas absorption tower;

[0033] 600. Storage tanks;

[0034] 700, a second exhaust duct;

[0035] 800. induced draft fan. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of 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.

[0037] It should be noted that in the description of the present invention, the terms "upper", "lower", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In the present invention, unless otherwise clearly specified and limited, the term "connection" and other terms should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0040] like Figures 1 to 4 As shown, this embodiment provides a device for removing volatile organic matter from a raw material, which can completely remove the volatile organic matter in the raw material, namely maleic anhydride, thereby improving the quality of the prepared glyoxylic acid.

[0041] The device for removing volatile organic matter from raw materials comprises a dissolution tank 100 , an aeration tank 200 , an air supply mechanism 300 and a first exhaust pipe 400 .

[0042] The dissolving tank 100 is used to input maleic anhydride and process pure water to prepare maleic anhydride solution, so as to facilitate the escape of volatile organic matter that is insoluble in water from the maleic anhydride solution; a switchable first liquid outlet 101 is provided at the bottom of the dissolving tank 100, and an electric control valve (not shown in the figure) is provided at the first liquid outlet 101.

[0043] The aeration tank 200 is a closed tank body, and a liquid inlet 201 and a second liquid outlet 202 are respectively provided at both ends near the bottom of the tank body. The liquid inlet 201 is connected to the first liquid outlet 101 through a pipeline, and the second liquid outlet 202 is connected to a storage tank 600 containing maleic anhydride solution after the volatile organic matter is removed through a pipeline and an electrically controlled valve (not shown in the figure).

[0044] An aeration pipe 203 is provided at the bottom of the aeration tank 200. Both ends of the aeration pipe 203 are opened, one of which serves as an air inlet. The air inlet is located outside the aeration tank 200 (not shown in the figure) to facilitate the connection between the air inlet and the air supply mechanism 300. The air inlet is used for the air supply mechanism 300 to supply gas to the aeration pipe 203 for aeration. A plurality of aeration holes 204 are provided on the aeration pipe 203. The gas supplied by the air supply mechanism 300 is discharged from the aeration holes 204 to take away the volatile organic matter in the maleic anhydride solution.

[0045] The air supply mechanism 300 is connected to the air inlet of the aeration pipe 203 .

[0046] One end of the first exhaust pipe 400 is inserted above the aeration tank 200 and is connected to the inside of the aeration tank 200. An electric control valve (not shown in the figure) is provided at the connection point to facilitate the control of the emission of volatile organic compounds. The other end of the first exhaust pipe 400 is used to discharge the volatile organic compounds escaping from the maleic anhydride solution in the aeration tank 200.

[0047] When in use, maleic anhydride containing volatile organic matter is put into the dissolution tank 100, and then process pure water is injected to dissolve the two to form a maleic anhydride solution. The electric control valve below the dissolution tank 100 is opened, and under the action of gravity, the maleic anhydride solution enters the aeration tank 200, and the gas supply mechanism 300 supplies gas to the aeration pipe 203. The gas is released from the aeration holes 204 to make the volatile organic matter in the maleic anhydride solution escape from the solution, and then discharged from the aeration tank 200 through the first exhaust pipe 400, thereby achieving the removal of the volatile organic matter in the maleic anhydride.

[0048] like Figure 2 , Figure 3 As shown, a stirring mechanism is provided in the dissolving tank 100, and the stirring mechanism is used to stir and dissolve maleic anhydride and to make the volatile organic matter in the maleic anhydride escape from the solution.

[0049] The stirring mechanism includes a motor 102, a stirring rod 103 and multiple groups of stirring blades 104. The motor 102 is arranged at the top of the dissolution tank 100, the stirring rod 103 is arranged inside the dissolution tank 100 and is located in the center. The top of the stirring rod 103 is connected to the driving shaft of the motor 102. The multiple groups of stirring blades 104 are arranged on the stirring rod 103 from top to bottom, and the blade ends of the stirring blades 104 are arranged close to the inner wall of the dissolution tank 100, so that the stirring range is large enough to fully stir the solution in the dissolution tank 100.

[0050] A plurality of cutting holes 105 are evenly arranged on each stirring blade 104 of each group of stirring blades 104. The cutting holes 105 are used to cut the water flow when the stirring blades 104 stir the solution, so that part of the volatile organic compounds can escape before the aeration tank 200 aerates and removes the volatile organic compounds, thereby making the removal of the volatile organic compounds more thorough.

[0051] The impurity removal device of maleic anhydride in the preparation process of glyoxylic acid includes a second exhaust pipe 700, one end of which is inserted above the dissolution tank 100 and connected to the interior of the dissolution tank 100, and the other end of the second exhaust pipe 700 is used to discharge volatile organic matter escaping from the maleic anhydride solution in the dissolution tank 100.

[0052] The impurity removal device of maleic anhydride in the preparation process of glyoxylic acid also includes a tail gas absorption tower 500, which is connected to the first exhaust pipe 400 and the second exhaust pipe 700 respectively. When volatile organic matter is discharged from the dissolution tank 100 and the aeration tank 200, it is directly discharged into the air, which may cause harm and pollution to the environment. Therefore, the tail gas absorption tower 500 is set to absorb and treat the volatile organic matter discharged from the first exhaust pipe 400 and the second exhaust pipe 700, which not only reduces the harm and pollution to the environment, but also the treated tail gas can be used to refine related chemical substances and put them into preparation and use again, reducing the waste of resources.

[0053] like Figure 1 As shown, the first exhaust duct 400 and the second exhaust duct 700 are both provided with an induced draft fan 800. The induced draft fan 800 can accelerate the efficiency of the first exhaust duct 400 and the second exhaust duct 700 in exhausting volatile organic compounds, thereby improving the efficiency of impurity removal.

[0054] like Figure 4 As shown, the aeration pipe 203 is a serpentine structure, and the length and width of the cross section of the serpentine structure are adapted to the aeration tank 200. The serpentine structure can increase the aeration area and improve the efficiency and effectiveness of removing volatile organic impurities.

[0055] The first exhaust pipe 400 includes a main pipe and a plurality of branch pipes, one end of each of which is inserted into the aeration tank 200, and the other end is connected to the main pipe. The branch pipes are evenly inserted above the aeration tank 200, and can quickly discharge the gas at various positions in the aeration tank 200, thereby improving the efficiency of discharging volatile organic compounds.

[0056] The air supply mechanism 300 uses an air compressor, which can compress air and send it into the aeration pipe 203. Compared with other gases such as nitrogen, compressed air has low cost and is simple to prepare, which is conducive to controlling the cost of the impurity removal device.

[0057] The utility model completely removes the volatile organic impurities which are insoluble in water in maleic anhydride, improves the product quality of glyoxylic acid, can carry out continuous operation, and improves economic benefits.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0059] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A device for removing volatile organic compounds from raw materials, characterized in that: include: A dissolving tank, the bottom of which is provided with a switchable first liquid outlet, and the dissolving tank is configured to dissolve the raw material; An aeration tank, on which a liquid inlet and a second liquid outlet are provided, the liquid inlet is connected to the first liquid outlet, an aeration pipe is provided in the aeration tank, one end of the aeration pipe is an air inlet, and the aeration pipe is provided with a plurality of aeration holes; an air supply mechanism connected to the air inlet of the aeration pipeline, the air supply mechanism being configured to supply gas into the aeration pipeline for aeration; A first exhaust pipe is communicated with the interior of the aeration tank, and the first exhaust pipe is configured to exhaust volatile organic matter escaping from the raw material solution in the aeration tank.

2. The device for removing volatile organic compounds from raw materials according to claim 1, characterized in that: A stirring mechanism is provided in the dissolving tank, and the stirring mechanism is configured to stir and dissolve the raw materials and to make volatile organic matter in the raw materials escape from the solution.

3. The device for removing volatile organic compounds from raw materials according to claim 2, characterized in that: The stirring mechanism includes a motor, a stirring rod and multiple groups of stirring blades. The motor is arranged on the dissolving tank. The stirring rod is arranged inside the dissolving tank and connected to the motor. The multiple groups of stirring blades are arranged on the stirring rod from top to bottom.

4. The device for removing volatile organic compounds from raw materials according to claim 3, characterized in that: The stirring blade is provided with a cutting hole.

5. The device for removing volatile organic compounds from raw materials according to claim 4, characterized in that: The device for removing volatile organic matter from the raw material comprises a second exhaust pipe, which is connected to the inside of the dissolving tank and is configured to discharge volatile organic matter escaping from the raw material solution in the dissolving tank.

6. The device for removing volatile organic compounds from raw materials according to claim 5, characterized in that: The device for removing volatile organic compounds from raw materials further comprises a tail gas absorption tower, and the tail gas absorption tower is connected to the first exhaust pipe and the second exhaust pipe respectively.

7. The device for removing volatile organic compounds from raw materials according to claim 6, characterized in that: The first exhaust duct and the second exhaust duct are both provided with induced draft fans.

8. The device for removing volatile organic compounds from raw materials according to claim 1, characterized in that: The aeration pipeline is a serpentine structure.

9. The device for removing volatile organic compounds from raw materials according to claim 1, characterized in that: The first exhaust pipe includes a main pipe and a plurality of branch pipes, one end of the branch pipe is connected to the aeration tank, and the other end of the branch pipe is connected to the main pipe.

10. The device for removing volatile organic compounds from raw materials according to claim 1, characterized in that: The air supply mechanism is an air compressor.

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