Tail gas absorption device for cyhalofop-butyl production

Abstract

The utility model discloses a tail gas absorption device for cyhalofop-butyl production, which comprises a suction filtration tank and a condenser, a first tail gas discharge pipe of the suction filtration tank is communicated with the condenser, and the condenser comprises a refrigerant inlet pipe, a refrigerant discharge pipe, a tail gas inlet pipe and a second tail gas discharge pipe. Distributors are fixed to the two ends, close to the refrigerant inlet pipe and the refrigerant outlet pipe, of the interior of the condenser, a plurality of distribution pipes are communicated between the two distributors, and the sides, away from each other, of the two distributors are correspondingly communicated with the refrigerant inlet pipe and the refrigerant outlet pipe respectively. According to the utility model, tail gas sequentially flows through the plurality of cooling cavities under the blocking effect of the partition plates, so that the retention time of the gas in the condenser is prolonged, the contact time between the tail gas and the distribution pipes is prolonged, the condensation effect can be improved, the tail gas can be more uniformly distributed among the distribution pipes, and the condensation efficiency is improved. The distribution pipes can further improve the heat exchange rate, and the condensation effect on the tail gas is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cyhalofop-butyl production, in particular to a tail gas absorption device for cyhalofop-butyl production. Background Art

[0002] Cyhalofop-butyl is mainly used to control important grass weeds. Cyhalofop-butyl is highly effective against Leptochloa chinensis, has a certain control effect on young barnyard grass, and can also control crabgrass, paspalum distachyon, foxtail grass, goosegrass, and foxtail grass. It is ineffective against sedge weeds and broad-leaved weeds. During the production process of cyperaceae weeds, cyhalofop-butyl needs to be desalted. The specific desalting method is: the crude cyhalofop-butyl obtained by polymerization reaction and esterification reaction is placed in the suction filtration tank through the material pipeline for suction filtration, the salt filter cake is washed twice with dimethylformamide, and the filter residue is used as a by-product. The suction exhaust gas is condensed and used for suction washing.

[0003] In the prior art, ordinary shell-and-tube condensers are generally used for condensation. The exhaust gas stays in the shell side of the condensing device for a short time. There are generally only a few baffles with air flow gaps in the shell side to block the exhaust gas. The gas is distributed only once and then contacts and exchanges heat with the refrigerant in the shell and tube. The contact between the gas and the refrigerant is not sufficient, resulting in low condensation efficiency. Utility Model Content

[0004] In order to solve the problems mentioned in the above background technology, the utility model provides a tail gas absorption device for cyhalofop-butyl production.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A tail gas absorption device for cyfluthrin production comprises a suction filtration tank and a condenser, wherein a first tail gas discharge pipe of the suction filtration tank is connected to the condenser, and the condenser comprises a refrigerant inlet pipe, a refrigerant discharge pipe, a tail gas inlet pipe and a second tail gas discharge pipe, distributors are fixed inside the condenser near both ends of the refrigerant inlet pipe and the refrigerant discharge pipe, a plurality of distribution pipes are connected between the two distributors, and the sides of the two distributors away from each other are respectively connected to the refrigerant inlet pipe and the refrigerant discharge pipe.

[0007] Preferably, a drain pipe is installed at the bottom end of the condenser, and a plurality of drain pipes are provided, and the bottom ends of the drain pipes converge into a drain main pipe.

[0008] Preferably, a plurality of partition plates are fixed in the condenser, the partition plates divide the condenser into a plurality of independent cooling chambers, and a plurality of series pipes are fixed at the top of the condenser, the series pipes are used to connect the cooling chambers in series, and a plurality of drain pipes correspond to and are connected with the cooling chambers one by one.

[0009] Preferably, an air intake distribution pipe is provided inside the cooling cavity, the air intake distribution pipe is bent and coiled between the distribution pipes, and a plurality of exhaust holes are equidistantly provided on the air intake distribution pipe.

[0010] Preferably, the air intake distribution pipe close to one side of the exhaust gas inlet pipe is connected to the exhaust gas inlet pipe, and the remaining air intake distribution pipes are connected to one end of the series pipe respectively.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] In the utility model, the exhaust gas passes through the barrier effect of the partition plate and flows through multiple cooling chambers in sequence, thereby extending the residence time of the gas inside the condenser, thereby increasing the contact time between the exhaust gas and the distribution pipe, thereby improving the condensation effect, and can more evenly distribute the exhaust gas between the various distribution pipes. The distribution pipe can further improve the heat exchange rate and improve the condensation effect on the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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 only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is the overall front view of the utility model;

[0015] Figure 2 It is a front view of the condenser of the present invention;

[0016] Figure 3 is a perspective view of a condenser of the present invention;

[0017] Figure 4 A sectional view from the main perspective of the condenser of the present invention;

[0018] Figure 5 This is a schematic diagram of the distribution of the air intake distribution pipe of the present invention;

[0019] In the figure: 1 filtration tank, 101 first exhaust gas discharge pipe, 8 condenser, 801 refrigerant inlet pipe, 802 refrigerant discharge pipe, 803 distributor, 804 distribution pipe, 805 partition plate, 806 exhaust gas inlet pipe, 807 second exhaust gas discharge pipe, 808 air intake distribution pipe, 809 series pipe, 810 drain pipe, 811 drain main pipe, 812 exhaust hole. DETAILED DESCRIPTION

[0020] 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. Example

[0021] Reference Figure 1-5 A tail gas absorption device for cyhalofop-butyl production comprises a suction filtration tank 1 and a condenser 8, characterized in that: a first tail gas discharge pipe 101 of the suction filtration tank 1 is connected to the condenser 8, the condenser 8 comprises a refrigerant inlet pipe 801, a refrigerant discharge pipe 802, a tail gas inlet pipe 806 and a second tail gas discharge pipe 807, distributors 803 are fixed at both ends of the interior of the condenser 8 near the refrigerant inlet pipe 801 and the refrigerant discharge pipe 802, a plurality of distribution pipes 804 are connected between the two distributors 803, and the sides of the two distributors 803 that are away from each other are respectively connected to the refrigerant inlet pipe 801 and the refrigerant discharge pipe 802, the tail gas is passed into the condenser 8, and liquid cyhalofop-butyl is obtained after condensation, thereby achieving the purpose of tail gas recovery.

[0022] A drain pipe 810 is installed at the bottom of the condenser 8. There are multiple drain pipes 810, and the bottom ends of the drain pipes 810 converge into a drain main pipe 811.

[0023] The exhaust gas enters the shell of the condenser 8, and the refrigerant flows through the condenser 8 through the distribution pipe 804. The exhaust gas and the refrigerant exchange heat when the exhaust gas enters the condenser 8, so that the cyhalofop-butyl in the exhaust gas is liquefied and remains in the condenser 8, and is finally discharged through the drain pipe 810.

[0024] Among them, a plurality of partition plates 805 are fixed in the condenser 8, and the partition plates 805 divide the condenser 8 into a plurality of independent cooling chambers, and a plurality of series pipes 809 are fixed at the top of the condenser 8, and the series pipes 809 are used to connect the cooling chambers in series, and a plurality of drain pipes 810 correspond to and communicate with the cooling chambers one by one;

[0025] The exhaust gas passes through the barrier effect of the partition plate 805 and flows through multiple cooling chambers in sequence, thereby extending the residence time of the gas inside the condenser 8, thereby increasing the contact time between the exhaust gas and the distribution pipe 804, thereby improving the condensation effect.

[0026] An air inlet distribution pipe 808 is provided inside the cooling cavity, and the air inlet distribution pipe 808 is bent and coiled between the distribution pipes 804, and a plurality of exhaust holes 812 are evenly spaced on the air inlet distribution pipe 808;

[0027] Due to the existence of the distribution pipe 804, the distribution pipe is distributed as follows Figure 5 As shown, the exhaust gas can be more evenly distributed among the distribution pipes 804, further improving the heat exchange rate and the condensation effect of the exhaust gas.

[0028] The air intake distribution pipe 808 near the exhaust gas inlet pipe 806 is connected to the exhaust gas inlet pipe 806, and the other air intake distribution pipes 808 are connected to one end of the series pipe 809 respectively.

[0029] The exhaust gas flows through the exhaust gas inlet pipe 806 into the first cooling chamber, then flows into the air intake distribution pipe 808 in the next cooling chamber through the first series pipe 809, and then flows into the series pipe 809 on the next cooling chamber, and finally is discharged from the second exhaust gas outlet pipe 807 in this step-by-step flow.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like 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, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tail gas absorption device for cyhalofop-butyl production, comprising a suction filtration tank (1) and a condenser (8), characterized in that: The first exhaust gas discharge pipe (101) of the filtration tank (1) is connected to the condenser (8), and the condenser (8) comprises a refrigerant inlet pipe (801), a refrigerant discharge pipe (802), an exhaust gas inlet pipe (806) and a second exhaust gas discharge pipe (807). Distributors (803) are fixed at both ends of the interior of the condenser (8) close to the refrigerant inlet pipe (801) and the refrigerant discharge pipe (802). A plurality of distribution pipes (804) are connected between the two distributors (803), and the sides of the two distributors (803) that are away from each other are respectively connected to the refrigerant inlet pipe (801) and the refrigerant discharge pipe (802).

2. A tail gas absorption device for cyhalofop-butyl production according to claim 1, characterized in that: A drain pipe (810) is installed at the bottom end of the condenser (8), a plurality of drain pipes (810) are provided, and the bottom ends of the drain pipes (810) converge into a drain main pipe (811).

3. A tail gas absorption device for cyhalofop-butyl production according to claim 1, characterized in that: A plurality of partition plates (805) are fixed inside the condenser (8), the partition plates (805) dividing the condenser (8) into a plurality of independent cooling chambers, and a plurality of series pipes (809) are fixed at the top of the condenser (8), the series pipes (809) are used to connect the cooling chambers in series, and the plurality of drainage pipes (810) correspond to and are connected to the cooling chambers one by one.

4. A tail gas absorption device for cyhalofop-butyl production according to claim 3, characterized in that: An air intake distribution pipe (808) is provided inside the cooling cavity. The air intake distribution pipe (808) is bent and coiled between the distribution pipes (804), and a plurality of exhaust holes (812) are equidistantly provided on the air intake distribution pipe (808).

5. A tail gas absorption device for cyhalofop-butyl production according to claim 1, characterized in that: The air intake distribution pipe (808) close to one side of the exhaust gas intake pipe (806) is connected to the exhaust gas intake pipe (806), and the remaining air intake distribution pipes (808) are respectively connected to one end of the series pipe (809).

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