A low-pressure drying device for purifying crude acetylene for dissolved acetylene production

Abstract

The present invention discloses a low-pressure drying device for purifying crude acetylene for production of dissolved acetylene, comprising a first box, a second box installed on the top of the first box, and a partition plate installed in the inner center of the second box to form a first cavity and a second cavity. The present invention can move the pressing plate downward by extending the telescopic rod, at which time the acetylene inside the first cavity will be squeezed into the through hole set at the bottom, and then transported to the dehumidification cylinder to remove moisture, and the acetylene gas is squeezed by the pressing plate, so that the acetylene gas accumulates inside the through hole to increase the downward pressure, and the acetylene gas pushes the adjustment plate downward, and a gap appears between the adjustment plate and the inner wall of the dehumidification cylinder, and the acetylene gas enters the second cavity and is absorbed by the molecular sieve, and then the acetylene gas is stored in the first cavity after absorbing moisture through the molecular sieve.

Description

Technical Field

[0001] The invention relates to the technical field of acetylene drying, in particular to low-pressure drying equipment for purifying crude acetylene used in dissolved acetylene production. Background Art

[0002] The acetylene produced by the calcium carbide method is washed with hypochlorous acid in a purification tower to remove impurities such as phosphorus and sulfur. The sulfuric acid and phosphoric acid generated by the reaction are neutralized and removed by a sodium hydroxide neutralization tower, and then washed with water to remove the alkali mixed in the acetylene. Finally, the clean acetylene gas is output. The acetylene output in this process will inevitably contain moisture, which has an adverse effect on the quality and yield of the subsequent synthesis of VCM. Therefore, the acetylene must be dried before it can be used to synthesize VCM.

[0003] Since acetylene and hydrogen chloride are the raw materials for synthesizing VCM, the traditional method of drying acetylene is to mix acetylene and hydrogen chloride and then cool and dry them. However, this method is prone to form hydrochloric acid, which corrodes pipeline equipment, and the temperature needs to be controlled to a very low state, which leads to the risk of pipeline freezing and blockage. In addition, it is difficult to reduce the moisture content to a very low level in this method.

[0004] Therefore, it is necessary to provide a low-pressure drying device for purifying crude acetylene for dissolved acetylene production to solve the above technical problems. Summary of the invention

[0005] The object of the present invention is to provide a low-pressure drying device for purifying crude acetylene for dissolved acetylene production to solve the problems existing in the above-mentioned background technology. The technical solution of the present invention provides a solution that is significantly different from the prior art in view of the technical problem that the prior art solution is too single.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a low-pressure drying device for purifying crude acetylene for dissolved acetylene production, comprising a first box body, a second box body is installed on the top of the first box body, a partition plate is installed at the inner center of the second box body to form a first cavity and a second cavity, a cross partition plate is arranged inside the first box body to form a first chamber, a second chamber, a third chamber and a fourth chamber, a dehumidification cylinder is installed at the inner top center of the first chamber, and a separation mechanism is installed inside the second chamber.

[0007] Preferably, a telescopic rod is installed at one end of the top of the first box body, and the telescopic end of the telescopic rod passes through the inside of the first cavity and is connected to a pressure plate.

[0008] Preferably, a horizontal partition plate is installed at the inner center of the dehumidification cylinder to form a first cavity and a second cavity, springs fixed to the top of the first cavity are installed at both ends of the first cavity, an adjustment plate is connected to the bottom of the spring, and a molecular sieve is arranged inside the second cavity.

[0009] Preferably, an annular pipe is fitted on the outer wall of the dehumidifier cylinder, and one end of the annular pipe at the top is connected to a first connecting pipe with a solenoid valve, and one end of the dehumidifier cylinder is connected to a second connecting pipe with a solenoid valve, one end of the first connecting pipe and the second connecting pipe pass through the third chamber and are connected to two channels, the other end of the two channels is connected to an exhaust pipe with an exhaust pump, one end of the annular pipe at the bottom is connected to a transport pipe that passes through the third chamber, and a connecting pipe controlled by an electromagnetic control valve is provided at the bottom of the third chamber.

[0010] Preferably, the separation mechanism includes rotating rollers equidistantly arranged inside the second chamber, the outer walls of the rotating rollers are provided with openings equidistantly, both ends of the second chamber are provided with slide grooves equidistantly, both ends of the rotating rollers are provided with circular rotating blocks, one end of the circular rotating block on the left side is provided with a limiting hole and a connecting rod is installed, the other end of the connecting rod is connected with a gear, and the adjacent gears are meshed with each other, and a connecting pipe that runs through the fourth chamber and is controlled by an electromagnetic control valve is provided at the bottom of one end of the second chamber.

[0011] Preferably, the rotating roller is made of MOF material.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention can move the pressure plate downward by extending the telescopic rod. At this time, the acetylene inside the first cavity will be squeezed into the through hole set at the bottom, and then transported to the dehumidifier to remove moisture. The acetylene gas is squeezed by the pressure plate, so that the acetylene gas accumulates inside the through hole to increase the downward pressure. At this time, the acetylene gas will push the adjustment plate downward. At this time, a gap will appear between the adjustment plate and the inner wall of the dehumidifier. At this time, the acetylene gas will enter the second cavity and absorb moisture by the molecular sieve. Then, the acetylene gas will absorb moisture through the molecular sieve and be stored in the first cavity.

[0014] After the acetylene gas passes through the molecular sieve of the present invention, the nitrogen stored in the third chamber is transported to the dehumidification cylinder through the second connecting pipe, and the remaining acetylene gas is blown to the outside of the dehumidification cylinder. Then, the nitrogen in the third chamber is heated and then transported to the inside of the annular pipe through the first connecting pipe. During the transportation of the nitrogen in the annular pipe, the temperature of the nitrogen with a certain temperature can not only dry the moisture inside the molecular sieve, so that the dehumidification effect of the molecular sieve will not decrease, but also dry the acetylene gas in the first chamber during the nitrogen transportation process, and then re-enter the third chamber through the transportation pipe. At this time, the pipe controlled by the solenoid valve connecting the third chamber and the second chamber can be opened. At this time, the nitrogen with temperature will be transported to the inside of the second chamber to squeeze the nitrogen at room temperature to the neutralization temperature inside the third chamber, and then the nitrogen will be continuously transported to the inside of the dehumidification cylinder through the second connecting pipe, and the acetylene in the first chamber will be squeezed to the inside of the second chamber for separation.

[0015] The present invention can mesh and rotate all the gears by controlling a group of gears to rotate, thereby driving all the rotating rollers to rotate, and then acetylene can be absorbed through the arranged openings, and the acetylene can be stored in contact with the openings with a maximum area through the continuous rotation of the rotating rollers, and the arranged gears and rotating rollers are disassembly structures, and when the rotating rollers completely absorb and store the acetylene, the acetylene can be collected by disassembling the rotating rollers, and the remaining nitrogen can be transported to the inside of the fourth chamber for storage and reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the stereogram of the present invention;

[0017] Figure 2 is a three-dimensional cross-sectional view of the present invention;

[0018] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 It is a front view structural schematic diagram of the present invention;

[0020] Figure 5 It is a schematic diagram of the internal structure of the dehumidification cylinder of the present invention.

[0021] In the figure: 1. first box body; 101. first chamber; 102. second chamber; 103. third chamber; 104. fourth chamber; 2. second box body; 201. first chamber; 202. second chamber; 3. dehumidifier cylinder; 301. first cavity; 302. second cavity; 303. spring; 304. adjustment plate; 4. separation mechanism; 401. rotating roller; 402. opening; 403. slide groove; 404. circular rotating block; 405. connecting rod; 406. gear; 5. telescopic rod; 6. pressure plate; 7. annular pipe; 8. first connecting pipe; 9. second connecting pipe; 10. two-way; 11. exhaust pipe; 12. transport pipe. DETAILED DESCRIPTION

[0022] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to 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", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" 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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0024] See also Figure 1-Figure 5A low-pressure drying device for purifying crude acetylene for dissolved acetylene production comprises a first box body 1, a second box body 2 is installed on the top of the first box body 1, a partition plate is installed at the inner center of the second box body 2 to form a first cavity 201 and a second cavity 202, a cross partition plate is arranged inside the first box body 1 to form a first chamber 101, a second chamber 102, a third chamber 103 and a fourth chamber 104, a dehumidification cylinder 3 is installed at the inner top center of the first chamber 101, and a separation mechanism 4 is installed inside the second chamber 102.

[0025] like Figure 1-Figure 5 As shown, a telescopic rod 5 is installed at one end of the top of the first box body 1, and the telescopic end of the telescopic rod 5 passes through the first cavity 201 and is connected to a pressure plate 6. The pressure plate 6 can be moved downward by extending the telescopic rod 5. At this time, the acetylene inside the first cavity 201 will be squeezed into the through hole set at the bottom, and then transported to the dehumidification cylinder 3 to remove moisture.

[0026] like Figure 1-Figure 5 As shown, a horizontal partition plate is installed at the inner center of the dehumidification cylinder 3 to form a first cavity 301 and a second cavity 302. Springs 303 fixed to the top of the first chamber 101 are installed at both ends of the first cavity 301. The bottom of the spring 303 is connected to an adjusting plate 304. A molecular sieve is arranged inside the second cavity 302. The acetylene gas is squeezed by the pressing plate 6 so that the acetylene gas accumulates inside the through hole to increase the downward pressure. At this time, the acetylene gas will push the adjusting plate 304 downward. At this time, a gap will appear between the adjusting plate 304 and the inner wall of the dehumidification cylinder 3. At this time, the acetylene gas will enter the second cavity 302 and be absorbed by the molecular sieve. Then, the acetylene gas is stored in the first chamber 101 after absorbing moisture through the molecular sieve.

[0027] like Figure 1-Figure 5As shown, an annular pipe 7 is fitted on the outer wall of the dehumidification cylinder 3, and one end of the annular pipe 7 on the top is connected to a first connecting pipe 8 with a solenoid valve, one end of the dehumidification cylinder 3 is connected to a second connecting pipe 9 with a solenoid valve, one end of the first connecting pipe 8 and the second connecting pipe 9 passes through the third chamber 103 and is connected to a two-way 10, the other end of the two-way 10 is connected to an exhaust pipe 11 with an exhaust pump, one end of the bottom annular pipe 7 is connected to a transport pipe 12 that passes through the third chamber 103, and a connecting pipe controlled by an electromagnetic control valve is provided at the bottom of the third chamber 103. After the acetylene gas passes through the molecular sieve, the nitrogen stored in the third chamber 103 is transported to the dehumidification cylinder 3 through the second connecting pipe 9, and the remaining acetylene gas is blown to the outside of the dehumidification cylinder 3, and then the nitrogen in the third chamber 103 is heated, and then passed through the third chamber 103. A connecting pipe 8 is used to transport nitrogen to the inside of the annular pipe 7. During the transportation of nitrogen with a certain temperature inside the annular pipe 7, its temperature can not only dry the moisture inside the molecular sieve, so that the dehumidification effect of the molecular sieve will not decrease, but also dry the acetylene gas inside the first chamber 101 during the nitrogen transportation process, and then re-enter the third chamber 103 through the transportation pipe 12. At this time, the pipe controlled by the solenoid valve connecting the third chamber 103 and the second chamber 202 can be opened. At this time, the nitrogen with temperature will be transported to the inside of the second chamber 202 to squeeze the nitrogen at room temperature into the third chamber 103 to neutralize the temperature, and then the nitrogen will be continuously transported to the inside of the dehumidification cylinder 3 through the second connecting pipe 9, and the acetylene inside the first chamber 101 will be squeezed into the inside of the second chamber 102 for separation.

[0028] like Figure 1-Figure 5As shown, the separation mechanism 4 includes a rotating roller 401 equidistantly arranged in the second chamber 102, the outer wall of the rotating roller 401 is equidistantly provided with openings 402, both ends of the second chamber 102 are equidistantly provided with slide grooves 403, both ends of the rotating roller 401 are installed with circular rotating blocks 404, one end of the circular rotating block 404 on the left side is provided with a limiting hole and a connecting rod 405 is installed, the other end of the connecting rod 405 is connected with a gear 406, and the two adjacent gears 406 are meshed with each other, and a connecting rod 406 that penetrates to the fourth chamber 104 and is controlled by an electromagnetic control valve is provided at the bottom of one end of the second chamber 102 The pipeline can mesh and rotate all the gears 406 by controlling a group of gears 406 to rotate, thereby driving all the rotating rollers 401 to rotate, and then acetylene can be absorbed through the set openings 402, and the continuous rotation of the rotating rollers 401 can make the acetylene contact the openings 402 with the maximum area for storage, and the gears 406 and the rotating rollers 401 are disassembly structures. When the rotating rollers 401 completely absorb and store the acetylene, the acetylene can be collected by disassembling the rotating rollers 401, and the remaining nitrogen can be transported to the inside of the fourth chamber 104 for storage and reuse.

[0029] As shown in the figure, the rotating roller 401 is made of MOF material, which has high porosity, high specific surface area, adjustable pore size and shape, and has good acetylene storage function.

[0030] Working principle: when in use, acetylene is placed inside the first cavity, nitrogen is placed inside the second cavity and the third cavity, and the third cavity is a heating chamber. This is a prior art and will not be elaborated on. The pressing plate 6 can be moved downward by extending the telescopic rod 5. At this time, the acetylene inside the first cavity 201 will be squeezed into the through hole set at the bottom, and then transported to the dehumidifier cylinder 3 to remove moisture. The acetylene gas is squeezed by the pressing plate 6, so that the acetylene gas accumulates inside the through hole to increase the downward pressure. At this time, the acetylene gas will push the adjusting plate 304 downward. At this time, a gap will appear between the adjusting plate 304 and the inner wall of the dehumidifier cylinder 3. At this time, the acetylene The acetylene gas will enter the second cavity 302 and be absorbed by the molecular sieve, and then the acetylene gas will be stored in the first cavity 101 after absorbing the moisture through the molecular sieve. After the acetylene gas passes through the molecular sieve, the nitrogen stored in the third cavity 103 is transported to the dehumidification cylinder 3 through the second connecting pipe 9, and the remaining acetylene gas is blown to the outside of the dehumidification cylinder 3. Then, the nitrogen in the third cavity 103 is heated and then transported to the annular pipe 7 through the first connecting pipe 8. During the transportation of the nitrogen with a certain temperature in the annular pipe 7, its temperature can not only dry the moisture in the molecular sieve, but also make the score The dehumidification effect of the sub-sieve will not decrease, and the acetylene gas inside the first chamber 101 can be dried during the nitrogen transportation process, and then re-enter the third chamber 103 through the transportation pipe 12. At this time, the pipe controlled by the solenoid valve connecting the third chamber 103 and the second chamber 202 can be opened. At this time, the nitrogen with temperature will be transported to the second chamber 202, and the nitrogen at room temperature will be squeezed into the third chamber 103 to neutralize the temperature. Then, the nitrogen will be continuously transported to the dehumidification cylinder 3 through the second connecting pipe 9, and the acetylene inside the first chamber 101 will be squeezed into the second chamber 102. The acetylene is separated internally by controlling a group of gears 406 to rotate so as to mesh and rotate all the gears 406, thereby driving all the rotating rollers 401 to rotate. Then, the acetylene can be absorbed through the openings 402, and the acetylene can be stored in contact with the openings 402 with the largest area through the continuous rotation of the rotating rollers 401. The gears 406 and the rotating rollers 401 are disassembly structures. When the rotating rollers 401 completely absorb and store the acetylene, the acetylene can be collected by disassembling the rotating rollers 401, and the remaining nitrogen can be transported to the fourth chamber 104 for storage and reuse.

[0031] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A low-pressure drying device for purifying crude acetylene for dissolved acetylene production, comprising a first housing (1), characterized in that: A second box body (2) is installed on the top of the first box body (1); a partition plate is installed at the center of the interior of the second box body (2) to form a first cavity (201) and a second cavity (202); a cross partition plate is arranged inside the first box body (1) to form a first chamber (101), a second chamber (102), a third chamber (103) and a fourth chamber (104); a dehumidification cylinder (3) is installed at the center of the top end of the first chamber (101); and a separation mechanism (4) is installed inside the second chamber (102); The separation mechanism (4) comprises a rotating roller (401) equidistantly arranged in rotation inside the second chamber (102); the outer wall of the rotating roller (401) is provided with openings (402) at equal intervals; both ends of the second chamber (102) are provided with sliding grooves (403) at equal intervals; both ends of the rotating roller (401) are provided with circular rotating blocks (404); one end of the circular rotating block (404) on the left side is provided with a limiting hole and a connecting rod (405) is installed; the other end of the connecting rod (405) is connected to a gear (406), and two adjacent gears (406) are meshed with each other; and a connecting pipe that runs through the fourth chamber (104) and is controlled by an electromagnetic control valve is provided at the bottom of one end of the second chamber (102); The rotating roller (401) is made of MOF material; A horizontal partition plate is installed at the inner center of the dehumidification cylinder (3) to form a first cavity (301) and a second cavity (302); springs (303) fixed to the top of the first chamber (101) are installed at both ends of the first cavity (301); an adjustment plate (304) is connected to the bottom of the spring (303); and a molecular sieve is arranged inside the second cavity (302); An annular pipe (7) is fitted on the outer wall of the dehumidification cylinder (3), and one end of the annular pipe (7) at the top is connected to a first connecting pipe (8) with a solenoid valve, and one end of the dehumidification cylinder (3) is connected to a second connecting pipe (9) with a solenoid valve. One end of the first connecting pipe (8) and the second connecting pipe (9) passes through the third chamber (103) and is connected to a two-way pipe (10). The other end of the two-way pipe (10) is connected to an exhaust pipe (11) with an exhaust pump. One end of the annular pipe (7) at the bottom is connected to a transport pipe (12) passing through the third chamber (103), and a connecting pipe controlled by an electromagnetic control valve is provided at the bottom of the third chamber (103).

2. The low-pressure drying equipment for purifying crude acetylene for dissolved acetylene production according to claim 1, characterized in that: A telescopic rod (5) is installed at one end of the top of the first box body (1), and the telescopic end of the telescopic rod (5) passes through the interior of the first cavity (201) and is connected to a pressing plate (6).

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