Cooling tower for separating and recovering difluoromonochloroethane in monofluorodichloroethane production

Abstract

The utility model belongs to the field of cooling towers, in particular relates to a cooling tower for separating and recovering difluoromonochloroethane in monofluorodichloroethane production, and provides the following scheme aiming at the problems that when the existing cooling tower is used for washing the difluoromonochloroethane gas material, water cannot be fully contacted with the gas material, and the washing effect is poor. The reaction kettle comprises a lower kettle body and an upper kettle body mounted at the top of the lower kettle body, the flushing cover is fixedly arranged in the upper kettle body; the annular cavity is formed in the flushing cover; the plurality of flushing holes are formed in the flushing cover, and the flushing holes are communicated with the annular cavity; the connecting pipe is fixedly communicated with the annular cavity, and the top end of the connecting pipe extends to the upper part of the upper kettle body; the water conveying mechanism is arranged at the top of the upper kettle body, and the water conveying mechanism is connected with the connecting pipe. According to the reaction kettle, gas materials can be fully and uniformly contacted with water, the washing effect is improved, the upper kettle body and the lower kettle body can be separated, and the lower kettle body or the interior of the upper kettle body can be conveniently cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling towers, in particular to a cooling tower used for separating and recovering monochlorodifluoroethane in the production of monochlorodifluoroethane. Background Art

[0002] The steps for separating and recovering difluorochloroethane in the production of monofluorodichloroethane are as follows: difluorochloroethane gas, a byproduct at normal temperature and pressure, enters a cooling tower from a difluorochloroethane buffer through a gas material inlet at the bottom of a cooling tower. The cooling tower is controlled at normal pressure, and water is circulated through a water inlet at the top of the cooling tower for washing and cooling, with a temperature controlled at +5°C to +10°C. Since the boiling point of monofluorodichloroethane is 32°C, it becomes liquid after being washed with cold water and enters the cooling tower kettle. The boiling point of difluorochloroethane is -9.8°C and it is insoluble in water. The gaseous difluorochloroethane passes through the gas material outlet at the top of the cooling tower and the gas material inlet of the demister to the demister. Water and a portion of the reflux liquid of monofluorodichloroethane are returned to the cooling tower through the reflux port and then enter the cooling tower. The gaseous difluoroethylene material is sent to the difluoroethylene compression recovery system through the material outlet at the top of the demister. Since the density of difluoroethylene is greater than that of water and it is difficult to dissolve in water, the cooling tower kettle separates the water and difluoroethylene into layers. The upper water flows into the water tank through the water inlet from the water overflow port. The circulating water is then pumped into the water inlet of the water cooler through the water circulation pump from the water outlet of the water tank. After being cooled by the water cooler, it enters the cooling tower through the water outlet. The water cooler is controlled by +5℃ chilled brine. The +5℃ chilled brine flows from the brine inlet through the shell side of the water cooler to be cooled and then flows back to the refrigeration circulation system through the brine outlet. The difluoroethylene at the bottom of the cooling tower kettle flows from the material overflow port through the feed port at the top of the difluoroethylene recovery tank and enters the difluoroethylene recovery tank.

[0003] In the prior art, when difluorochloroethane gas material is washed with water through a cooling tower, water cannot fully contact the gas material, resulting in poor washing effect. Therefore, we propose a cooling tower for separating and recovering difluorochloroethane in monofluorodichloroethane production to solve the above problem. Utility Model Content

[0004] The purpose of the utility model is to solve the disadvantages in the prior art that when difluorochloroethane gas material is washed with water through a cooling tower, water cannot fully contact with the gas material and the washing effect is poor. A cooling tower for separating and recovering difluorochloroethane in the production of monofluorodichloroethane is proposed.

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

[0006] Cooling tower for separation and recovery of difluorochloroethane in the production of difluorochloroethane, including:

[0007] A lower kettle body and an upper kettle body installed on the top of the lower kettle body;

[0008] The flushing cover is fixedly arranged in the upper kettle body;

[0009] An annular cavity is provided in the flushing hood;

[0010] A plurality of flushing holes are provided in the flushing cover, and the flushing holes are communicated with the annular cavity;

[0011] A connecting pipe is fixedly connected to the annular cavity, and a top end of the connecting pipe extends to the top of the upper kettle body;

[0012] The water delivery mechanism is arranged on the top of the upper kettle body and is connected to the connecting pipe to deliver flushing water into the annular cavity;

[0013] The air inlet pipe is fixedly installed on the lower kettle body, and one end extends into the flushing hood.

[0014] Preferably, a liquid outlet is provided at the bottom of the lower kettle body, and an air outlet is provided on the upper kettle body.

[0015] Preferably, the water delivery mechanism includes a support rod fixedly mounted on the top of the upper kettle body, a water tank fixedly mounted on the top of the support rod, and a water inlet is provided on the water tank.

[0016] Preferably, a water pump is fixedly installed at the bottom of the water tank, the water inlet of the water pump is fixedly connected to the inside of the water tank, and the water outlet of the water pump is fixedly connected to the connecting pipe.

[0017] Preferably, two first fixing plates are fixedly installed on the outer side of the lower kettle body, and plug plates are fixedly installed on the tops of the two first fixing plates.

[0018] Preferably, two second fixing plates are fixedly installed on the outer side of the upper kettle body, and rectangular insertion holes are opened on the two second fixing plates. The tops of the two insertion plates pass through the two rectangular insertion holes.

[0019] Preferably, a reset groove is provided on one side of the two plug-in plates, and reset blocks are slidably installed in the two reset grooves, and the bottoms of the two reset blocks are in contact with the tops of the two second fixing plates respectively.

[0020] Preferably, one end of a spring is fixedly mounted on one inner wall of each of the two reset grooves, and the other ends of the two springs are fixedly connected to the two reset blocks respectively.

[0021] In the present invention, the cooling tower for separating and recovering difluorochloroethane in the production of monofluorodichloroethane has the following beneficial effects:

[0022] The by-product difluorochloroethane gas material at normal temperature and pressure enters the flushing cover through the air inlet pipe, the water in the water tank is extracted by the water pump, the annular cavity is formed through the connecting pipe, and finally sprayed out from multiple flushing holes to flush the gas material. The gas material is flushed through multiple flushing holes, which can make the gas material and water fully and evenly contact, thereby improving the flushing effect. When it is necessary to clean the inside of the lower kettle body or the upper kettle body, press the two reset blocks, and the two reset blocks squeeze the two springs into the two reset grooves, so that the bottom of the two reset blocks no longer contacts the top of the two second fixed plates. At this time, the upper kettle body can be pulled upward to separate the plug plate from the rectangular plug hole, and the upper kettle body is separated from the lower kettle body, thereby facilitating the cleaning of the inside of the lower kettle body or the upper kettle body.

[0023] The utility model can ensure that the gas material can be fully and evenly contacted with water, thereby improving the flushing effect; the upper kettle body and the lower kettle body can be separated, and the interior of the lower kettle body or the upper kettle body can be easily cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of a cooling tower for separating and recovering difluorochloroethane in the production of difluorochloroethane proposed by the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the flushing hood, connecting pipe and air inlet pipe of a cooling tower for separating and recovering difluorochloroethane in the production of monofluorodichloroethane proposed by the utility model;

[0026] Figure 3 The utility model provides a schematic structural diagram of the lower kettle, flushing cover, air inlet pipe and connecting pipe of a cooling tower for separating and recovering difluorochloroethane in the production of monofluorodichloroethane.

[0027] In the figure: 1. Lower kettle body; 2. Upper kettle body; 3. Flushing cover; 4. Flushing hole; 5. Air inlet pipe; 6. Connecting pipe; 7. Support rod; 8. Water tank; 9. Water pump; 10. Water inlet; 11. Air outlet; 12. Liquid outlet; 13. Second fixing plate; 14. First fixing plate; 15. Insert plate; 16. Rectangular jack; 17. Reset groove; 18. Reset block. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Example 1

[0030] Reference Figure 1-Figure 3 , a cooling tower for separating and recovering difluorochloroethane in the production of monofluorodichloroethane, including:

[0031] A lower kettle body 1 and an upper kettle body 2 installed on the top of the lower kettle body 1;

[0032] The flushing cover 3 is fixedly arranged in the upper kettle body 2;

[0033] An annular cavity is provided in the flushing cover 3;

[0034] A plurality of flushing holes 4 are provided in the flushing cover 3, and the flushing holes 4 are communicated with the annular cavity;

[0035] The connecting pipe 6 is fixedly connected to the annular cavity, and the top end of the connecting pipe 6 extends to the top of the upper kettle body 2;

[0036] The water delivery mechanism is provided at the top of the upper kettle body 2 and is connected to the connecting pipe 6 to deliver flushing water into the annular cavity;

[0037] The air inlet pipe 5 is fixedly mounted on the lower kettle body 1, with one end extending into the flushing cover 3. The height of the open end of the air inlet pipe 5 in the flushing cover 3 is greater than the height of all flushing holes 4, so that the gas material passes through all flushing holes 4 from top to bottom.

[0038] In the present invention, a liquid outlet 12 is provided at the bottom of the lower kettle body 1 , and an air outlet 11 is provided on the upper kettle body 2 .

[0039] In the present invention, the water delivery mechanism comprises a support rod 7 fixedly mounted on the top of the upper kettle body 2 , a water tank 8 is fixedly mounted on the top of the support rod 7 , and a water inlet 10 is provided on the water tank 8 .

[0040] In the present invention, a water pump 9 is fixedly installed at the bottom of the water tank 8 , a water inlet of the water pump 9 is fixedly connected to the inside of the water tank 8 , and a water outlet of the water pump 9 is fixedly connected to the connecting pipe 6 .

[0041] In the present invention, two first fixing plates 14 are fixedly installed on the outer side of the lower kettle body 1 , and inserting plates 15 are fixedly installed on the tops of the two first fixing plates 14 .

[0042] In the present invention, two second fixing plates 13 are fixedly installed on the outer side of the upper kettle body 2 , and rectangular insertion holes 16 are opened on the two second fixing plates 13 . The tops of the two insertion plates 15 pass through the two rectangular insertion holes 16 .

[0043] In the present invention, a reset groove 17 is provided on one side of the two inserting plates 15 , and a reset block 18 is slidably installed in the two reset grooves 17 . The bottoms of the two reset blocks 18 are in contact with the tops of the two second fixing plates 13 respectively.

[0044] In the present invention, one end of a spring is fixedly mounted on one inner wall of each of the two reset grooves 17 , and the other ends of the two springs are fixedly connected to the two reset blocks 18 , respectively.

[0045] In the present invention, the by-product difluorochloroethane gas material at normal temperature and pressure enters the flushing hood 3 through the air inlet pipe 5, the water in the water tank 8 is extracted by the water pump 9, the annular cavity is formed through the connecting pipe 6, and finally it is sprayed out from the multiple flushing holes 4 to flush the gas material. The gas material is flushed through the multiple flushing holes 4, which can make the gas material and the water fully and evenly contact, thereby improving the flushing effect. When it is necessary to clean the inside of the lower kettle body 1 or the upper kettle body 2, press the two reset blocks 18, and the two reset blocks 18 squeeze the two springs into the two reset grooves 17, so that the bottom of the two reset blocks 18 no longer contacts the top of the two second fixed plates 13. At this time, the upper kettle body 2 can be pulled upward to separate the insert plate 15 from the rectangular insert hole 16, and the upper kettle body 2 is separated from the lower kettle body 1, thereby facilitating the cleaning of the inside of the lower kettle body 1 or the upper kettle body 2.

[0046] Example 2

[0047] The difference between this embodiment and the first embodiment is that a liquid level sensor is provided in the water tank 8 for monitoring the water volume.

[0048] The rest is the same as that of the first embodiment.

[0049] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cooling tower for separating and recovering difluorochloroethane in the production of monofluorodichloroethane, characterized in that: include: A lower kettle body (1) and an upper kettle body (2) mounted on the top of the lower kettle body (1); A flushing cover (3) is fixedly arranged in the upper kettle body (2); An annular cavity is provided in the flushing cover (3); A plurality of flushing holes (4) are provided in the flushing cover (3), and the flushing holes (4) are communicated with the annular cavity; A connecting pipe (6) is fixedly connected to the annular cavity, and the top end of the connecting pipe (6) extends to the top of the upper kettle body (2); A water delivery mechanism is provided on the top of the upper kettle body (2), the water delivery mechanism is connected to the connecting pipe (6), and delivers flushing water into the annular cavity; The air inlet pipe (5) is fixedly mounted on the lower kettle body (1), and one end of the air inlet pipe extends into the flushing cover (3).

2. The cooling tower for separating and recovering monochlorodifluoroethane in the production of monochlorodifluoroethane according to claim 1, characterized in that: The bottom of the lower kettle body (1) is provided with a liquid outlet (12), and the upper kettle body (2) is provided with a gas outlet (11).

3. The cooling tower for separating and recovering difluorochloroethane in the production of monofluorodichloroethane according to claim 2, characterized in that: The water delivery mechanism comprises a support rod (7) fixedly mounted on the top of the upper kettle body (2); a water tank (8) is fixedly mounted on the top of the support rod (7); and a water inlet (10) is provided on the water tank (8).

4. The cooling tower for separating and recovering difluorochloroethane in the production of monofluorodichloroethane according to claim 3, characterized in that: A water pump (9) is fixedly installed at the bottom of the water tank (8), the water inlet of the water pump (9) is fixedly connected to the inside of the water tank (8), and the water outlet of the water pump (9) is fixedly connected to the connecting pipe (6).

5. The cooling tower for separating and recovering difluorochloroethane in the production of monofluorodichloroethane according to claim 4, characterized in that: Two first fixing plates (14) are fixedly installed on the outer side of the lower kettle body (1), and plugging plates (15) are fixedly installed on the tops of the two first fixing plates (14).

6. The cooling tower for separating and recovering monochlorodifluoroethane in the production of monochlorodifluoroethane according to claim 5, characterized in that: Two second fixing plates (13) are fixedly installed on the outer side of the upper kettle body (2), and rectangular insertion holes (16) are provided on the two second fixing plates (13). The tops of the two insertion plates (15) pass through the two rectangular insertion holes (16).

7. The cooling tower for separating and recovering monochlorodifluoroethane in the production of monochlorodifluoroethane according to claim 6, characterized in that: A reset groove (17) is provided on one side of the two inserting plates (15), and reset blocks (18) are slidably installed in the two reset grooves (17). The bottoms of the two reset blocks (18) are respectively in contact with the tops of the two second fixing plates (13).

8. The cooling tower for separating and recovering difluorochloroethane in the production of monofluorodichloroethane according to claim 7, characterized in that: One end of a spring is fixedly mounted on one inner wall of each of the two reset grooves (17), and the other ends of the two springs are fixedly connected to the two reset blocks (18) respectively.

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