Esterification reaction kettle with nitrogen coil pipe

Abstract

The utility model belongs to the field of esterification reaction devices, and discloses an esterification reaction kettle with a nitrogen coil pipe, which comprises an esterification kettle, a cover body connected with the esterification kettle, an exhaust pipe connected with the cover body, the nitrogen coil pipe connected with a plurality of groups of gas outlet pipes detachably connected with non-return pipes, the non-return pipe is connected with a fixing ring and a positioning ring, the non-return pipe is slidably connected with a sealing plate, the fixing ring is connected with a reset spring, and the free end of the reset spring is connected with the sealing plate; according to the technical scheme, the non-return pipe is arranged on the gas outlet pipe, nitrogen can only be blown out from the nitrogen coil pipe through cooperation of the spring and the sealing plate, external gas and small-particle solids cannot enter the nitrogen coil pipe from the non-return pipe, then backflow of materials is avoided, the nitrogen coil pipe can be kept clean all the time, and the service life of the nitrogen coil pipe is prolonged. And the conditions that the next reaction is influenced by materials and the nitrogen coil pipe is blocked are avoided.

Description

Technical Field

[0001] The utility model relates to the field of esterification reaction devices, in particular to an esterification reaction kettle with a nitrogen coil. Background Art

[0002] The esterification kettle is a device for the esterification reaction, which belongs to the stirring equipment. The stirring equipment is often called the stirring kettle. When the stirring equipment is used as a reactor, it is also called a stirred tank reactor. A nitrogen coil is generally arranged on the inside of the reactor to blow nitrogen into the reactor. A plurality of sets of air outlets are arranged on the wall of the nitrogen coil so that nitrogen can be blown into the reactor. The nitrogen plays a protective role by the property of being an inert gas and can take away some harmful small molecules produced in the reaction, which has a positive effect. However, the nitrogen coils currently used all have air outlets directly. After the esterification reaction is completed, the substances generated by the esterification reaction will flow back into the nitrogen coil through the air outlet, and then be cooled and assisted on the inner wall of the nitrogen coil. As a result, when different esterification reactions are carried out subsequently, the nitrogen blown out of the nitrogen coil still has substances remaining from the previous reaction, which in turn affects the current reaction or causes the nitrogen coil to be blocked, which is inconvenient to use. Utility Model Content

[0003] The utility model aims to provide an esterification reaction kettle with a nitrogen coil to solve the problems raised in the above background technology.

[0004] In order to achieve the above object, the utility model provides the following technical solutions:

[0005] An esterification reaction kettle with a nitrogen coil comprises an esterification kettle, the esterification kettle is connected to a cover body, the cover body is connected to an exhaust pipe, the esterification kettle is connected to a nitrogen coil, the nitrogen coil is connected to an outlet pipe, the outlet pipe is provided with a plurality of groups, the outlet pipe is detachably connected to a check pipe, the check pipe is connected to a fixing ring and a positioning ring, the check pipe is slidably connected to a sealing plate, the fixing ring is connected to a reset spring, and the free end of the reset spring is connected to the sealing plate.

[0006] Preferably, the sealing plate is connected with a rubber ring.

[0007] Preferably, the sealing plate is connected with a positioning rod, and the positioning rod is slidably connected to the positioning ring.

[0008] Preferably, a plurality of groups of the gas outlet pipes are staggered along the nitrogen coil.

[0009] Preferably, the non-return pipe is threadedly connected to the air outlet pipe, and the inner diameter of the non-return pipe at a side away from the air outlet pipe is larger than the inner diameter of the non-return pipe at a side close to the air outlet pipe.

[0010] Compared with the prior art, this technical solution produces the following beneficial effects:

[0011] (1) The technical solution sets a check pipe on the outlet pipe. Through the cooperation of the spring and the sealing plate, the nitrogen can only be blown out from the nitrogen coil. The outside gas and small solid particles cannot enter the nitrogen coil from the check pipe, thereby avoiding the backflow of materials, so that the nitrogen coil can always be kept clean, avoiding the situation where the materials affect the next reaction and block the nitrogen coil.

[0012] (2) The technical solution improves the sealing between the sealing plate and the positioning ring through the rubber ring, thereby improving the blocking effect of the sealing plate; the positioning rod allows the flap sealing plate to move only horizontally relative to the non-return pipe, which facilitates the sealing plate to subsequently seal the non-return pipe; a number of groups of air outlet pipes and non-return pipes are arranged in an alternating manner, which facilitates the disassembly and replacement of the non-return pipe, thereby improving the applicability and practicality of the device; the outer inner diameter of the non-return pipe is larger than the inner outer diameter, which facilitates the connection with the nitrogen coil while providing sufficient installation space for the sealing plate and spring, thereby improving the manufacturing simplicity of the device and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view of the partial cross-sectional view of the utility model;

[0014] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0015] Figure 3 A side cross-sectional view of the fixing ring provided by the utility model;

[0016] Figure 4 A left side cross-sectional view of the positioning rod provided by the utility model;

[0017] Reference numerals: esterification kettle 1, nitrogen coil 2, cover 3, exhaust pipe 4, outlet pipe 5, check pipe 6, spring 7, positioning ring 8, rubber ring 9, sealing plate 10, positioning rod 11, fixing ring 12. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples:

[0019] like Figures 1 to 4The esterification reaction kettle with a nitrogen coil 2 shown in the figure comprises an esterification kettle 1, a cover body 3 is detachably connected to the top of the esterification kettle 1, the cover body 3 is connected to an exhaust pipe 4, the exhaust pipe 4 is connected to a control switch, the inside of the esterification kettle 1 is connected to a nitrogen coil 2, the free end of the nitrogen coil 2 passes through the esterification kettle 1, and can be subsequently connected to a nitrogen pump and an external nitrogen pipe, the nitrogen coil 2 is connected to an outlet pipe 5, the outlet pipe 5 is provided with a plurality of groups, the outlet pipe 5 is detachably connected to a check pipe 6, the check pipe 6 is connected to a fixing ring 12 and a positioning ring 8, the check pipe 6 slides A sealing plate 10 is connected, a fixing ring 12 is connected to a return spring 7, a free end of the return spring 7 is connected to the sealing plate 10, a rubber ring 9 is connected to the sealing plate 10, the rubber ring 9 can contact with the positioning ring 8, the sealing plate 10 is connected to a positioning rod 11, the positioning rod 11 is slidably connected to the positioning ring 8, a plurality of groups of outlet pipes 5 are staggered along the nitrogen coil 2, that is, vertically staggered, for easy subsequent disassembly, a check pipe 6 is threadedly connected to the outlet pipe 5, and the inner diameter of the check pipe 6 away from the outlet pipe 5 is larger than the inner diameter of the check pipe 6 close to the outlet pipe 5, such as Figure 2 As shown, the inner diameter of the right side of the non-return pipe 6 is larger than the inner diameter of the left side.

[0020] The specific implementation process is as follows:

[0021] When in use, the corresponding chemical substances are put into the esterification kettle 1 for the corresponding esterification reaction, and then nitrogen is introduced into the nitrogen coil 2 through the external nitrogen pump and the external nitrogen pipe. When the nitrogen enters the nitrogen coil 2, the nitrogen will rush out from the outlet pipe 5, thereby exerting an impact on the sealing plate 10 to Figure 2 For example, nitrogen will push the sealing plate 10 to move right. When the impact force of nitrogen on the sealing plate 10 is greater than the elastic force of the spring 7 on the sealing plate 10, the sealing plate 10 moves to the right under the action of nitrogen, and at the same time, the positioning rod 11 is equivalent to the positioning ring 8 moving to the right, thereby causing the sealing plate 10 to move out of the check tube 6, and the nitrogen can rush out of the check tube 6 into the esterification kettle 1 to realize the work of nitrogen. During this period, the control switch of the exhaust pipe 4 can be opened to facilitate nitrogen to blow harmful substances (such as small molecules with peculiar smell) out of the esterification kettle 1. At this time, the check tube 6 is opened under the impact of nitrogen, but when nitrogen is not being transported, nitrogen no longer impacts the sealing plate 10. Under the action of the restoring force of the spring 7, the sealing plate 10 moves to the left to close the opening of the check tube 6, thereby preventing the material in the esterification kettle 1 from flowing back into the nitrogen coil 2, avoiding affecting the next group of reaction materials, and avoiding the situation where the nitrogen coil 2 is blocked after the material is cooled. The check tube 6 can be unscrewed later, and the check tube 6 can be inspected and replaced, which greatly improves practicality.

[0022] In the technical solution, a check pipe 6 is arranged on the outlet pipe 5. Through the cooperation of the spring 7 and the sealing plate 10, nitrogen can only be blown out from the nitrogen coil 2, and external gas and small solid particles cannot enter the nitrogen coil 2 from the check pipe 6, thereby avoiding the backflow of materials, so that the nitrogen coil 2 can always be kept clean, and the materials are prevented from affecting the next reaction and blocking the nitrogen coil 2; the sealing between the sealing plate 10 and the positioning ring 8 is improved by the rubber ring 9, thereby improving the blocking effect of the sealing plate 10; the positioning rod 11 makes the flap 10 only move horizontally relative to the check pipe 6, which is convenient for the sealing plate 10 to seal the check pipe 6 later; a plurality of groups of outlet pipes 5 and check pipes 6 are staggered, which is convenient for disassembly and replacement of the check pipe 6, thereby improving the applicability and practicality of the device; the outer inner diameter of the check pipe 6 is larger than the inner outer diameter, which is convenient for connection with the nitrogen coil 2 while providing sufficient installation space for the sealing plate 10 and the spring 7, thereby improving the manufacturing simplicity of the device and reducing the production cost.

[0023] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An esterification reactor with a nitrogen coil, characterized in that: The invention comprises an esterification kettle (1), wherein the esterification kettle (1) is connected to a cover body (3), wherein the cover body (3) is connected to an exhaust pipe (4), wherein the esterification kettle (1) is connected to a nitrogen coil (2), wherein the nitrogen coil (2) is connected to an outlet pipe (5), wherein the outlet pipe (5) is provided with a plurality of groups, wherein the outlet pipe (5) is detachably connected to a check pipe (6), wherein the check pipe (6) is connected to a fixing ring (12) and a positioning ring (8), wherein the check pipe (6) is slidably connected to a sealing plate (10), wherein the fixing ring (12) is connected to a reset spring (7), wherein the free end of the reset spring (7) is connected to the sealing plate (10).

2. The esterification reaction kettle with nitrogen coil as claimed in claim 1, characterized in that: The sealing plate (10) is connected with a rubber ring (9).

3. The esterification reaction kettle with nitrogen coil as claimed in claim 1, characterized in that: The sealing plate (10) is connected to a positioning rod (11), and the positioning rod (11) is slidably connected to the positioning ring (8).

4. The esterification reaction kettle with nitrogen coil according to claim 1, characterized in that: A plurality of groups of the gas outlet pipes (5) are arranged in a staggered manner along the nitrogen coil (2).

5. The esterification reaction kettle with nitrogen coil according to claim 1, characterized in that: The non-return pipe (6) is threadedly connected to the air outlet pipe (5), and the inner diameter of the side of the non-return pipe (6) away from the air outlet pipe (5) is larger than the inner diameter of the side of the non-return pipe (6) close to the air outlet pipe (5).

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