Methanol rectifying tower with excess material recovery function

Abstract

The utility model provides a methanol rectifying tower with an excess material recovery function, which comprises a rectifying tower main body, an excess material recovery mechanism and a condenser assembly, and the lower left end of the rectifying tower main body is provided with the excess material recovery mechanism for filtering and recovering excess materials and stripping a liquid phase. The rectifying tower disclosed by the utility model has the beneficial effects that the rectifying tower body and the excess material recycling mechanism are additionally arranged, and the gas-liquid return pipe I and the liquid-phase return pipe I in the excess material recycling mechanism are respectively connected and fixed with the gas-liquid return pipe II and the liquid-phase return pipe II in the rectifying tower body through bolts; a liquid phase below the tower body enters the excess material filtering pipe fitting through the first liquid phase backflow pipe and is filtered twice through the first filter plate and the second filter plate, the filtered excess materials are recycled through the first recycling pipe and the second recycling pipe, the excess material recycling effect can be achieved, the rectifying tower body is additionally arranged, condensed gas phase downward flow makes contact with the gasified liquid phase layer by layer, and the effect of recycling the excess materials is achieved. The rectification degree can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of methanol distillation towers in the petrochemical industry, and particularly relates to a methanol distillation tower with a residual material recovery function. Background Art

[0002] In the petrochemical industry, methanol distillation requires the use of a methanol distillation tower to improve the degree of methanol distillation. Methanol feedstock often contains impurities, and common methanol distillation towers are often not equipped with a corresponding residual material recovery structure. Some impurities in the methanol feedstock cannot be vaporized and liquefied in the distillation tower. The residual material may contain a variety of organic matter, by-products, impurities, unreacted raw materials, and solvents. The composition is complex and difficult to separate.

[0003] Secondly, the accumulation of impurities in the residual material, such as heavy materials, byproducts, or unreacted materials, can clog the equipment, reduce tower efficiency, and affect the stable operation of the system if not removed promptly. The residual material will circulate with the liquid phase and may adhere to the pipe walls during multiple circulations, causing certain blockages in the pipe fittings, potentially causing operational failures in the methanol distillation tower and increasing the difficulty of subsequent cleaning.

[0004] In summary, the methanol distillation tower without the residual material recovery function has some problems in use, so it is hoped to propose a new structure to solve the above technical problems. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a methanol distillation tower with a residual material recovery function to solve the problems raised in the above background technology.

[0006] The utility model is realized through the following technical solutions: a methanol distillation tower with a residual material recovery function, comprising: a distillation tower main body, a residual material recovery mechanism and a condenser assembly, wherein the lower left end of the distillation tower main body is provided with a residual material recovery mechanism for filtering and recovering the residual material and stripping the liquid phase, the upper right end of the distillation tower main body is provided with a condenser assembly for condensing, circulating and distilling the gas phase, the middle position of the internal composition of the distillation tower main body is provided with a tower body, the inside of the tower body is provided with a plurality of groups of tower plates for close contact between the gas and liquid phases, the upper right end of the internal composition of the residual material recovery mechanism is provided with a recovery pipe 1 for recovering and guiding the residual material, and a recovery pipe 2 for recovering and guiding the residual material is provided below the recovery pipe 1.

[0007] As a preferred embodiment, a residual material filtering pipe is provided on the left side of the recovery pipe 1, and a filter plate 1 for preliminary filtering of the residual material is provided at the inner bending part of the residual material filtering pipe.

[0008] As a preferred embodiment, a filter plate 2 for secondary filtration of the residual material is provided on the lower left side of the filter plate 1, and the right sides of the filter plate 1 and the filter plate 2 are vertically penetrated to form a plurality of groups of filter holes equally distributed in a circle. The diameters of the filter holes of the filter plate 1 and the filter plate 2 decrease successively. The large particles in the liquid phase can be filtered out through the filter holes in the filter plate 1 and the filter plate 2, and the two groups of filter holes with different diameters can group the filtered particles.

[0009] As a preferred embodiment, a liquid phase reflux pipe 1 is provided above the residual material filtering pipe fitting, and a one-way valve is provided on the inner side of the liquid phase reflux pipe 1 for preventing liquid phase reflux. The liquid phase is introduced into the liquid phase reflux pipe 1 through the liquid phase reflux pipe 2 and then flows into the inner side of the residual material filtering pipe fitting. After the residual material is filtered, the one-way valve can be used to prevent it from flowing back.

[0010] As a preferred embodiment, a transition pipe is provided on the left side of the residual material filtering pipe, a reboiler is provided on the upper left side of the transition pipe, a gas-liquid reflux pipe 1 is provided above the reboiler, and a liquid reflux pipe 2 is provided at the lower end of the tower body;

[0011] A gas-liquid reflux pipe 2 is provided at the lower left end of the tower body, and the gas-liquid reflux pipe 1 and the gas-liquid reflux pipe 2, and the liquid phase reflux pipe 1 and the liquid phase reflux pipe 2 are all connected and fixed by bolts.

[0012] As a preferred embodiment, a feed pipe for introducing raw materials into the inside of the tower body is provided in the middle position on the left side of the tower body, a gas reflux pipe is provided at the upper end of the tower body, and a liquid-gas reflux pipe is provided at the upper right end of the tower body.

[0013] As a preferred embodiment, a liquid guide tube is provided at the upper right end of the inner side of the tower body, a liquid temporary storage tank is provided on the upper surface of the tower plate, and a plurality of gas phase holes are opened on the upper surface of the tower plate and distributed equally in a circle.

[0014] As a preferred embodiment, an overflow liquid guide pipe is provided on the left side of the tower plate, and the lower end of the overflow liquid guide pipe is located directly above the lower tower plate. The condensed gas phase flows downward and contacts the vaporized liquid phase layer by layer, which can improve the degree of distillation.

[0015] After adopting the above technical scheme, the beneficial effect of the utility model is as follows: by adding a distillation tower body and a residual material recovery mechanism, the gas-liquid reflux pipe 1 and the liquid phase reflux pipe 1 in the residual material recovery mechanism are respectively fixed with the gas-liquid reflux pipe 2 and the liquid phase reflux pipe 2 in the distillation tower body by bolts, and the liquid phase below the tower body enters the residual material filter pipe fitting through the liquid phase reflux pipe 1, and is filtered twice through the filter plate 1 and the filter plate 2, and the filtered residual material is recovered through the recovery pipe 1 and the recovery pipe 2, which can achieve the effect of residual material recovery. By adding the distillation tower body, the condensed gas phase flows down and contacts the vaporized liquid phase layer by layer, which can improve the degree of distillation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 The utility model is a partial structural schematic diagram of a methanol distillation tower with a residual material recovery function.

[0018] Figure 2 This is a structural schematic diagram of the distillation tower main body in a methanol distillation tower with a residual material recovery function according to the present invention.

[0019] Figure 3 This is a partial inner schematic diagram of a distillation tower body in a methanol distillation tower with a residual material recovery function according to the present invention.

[0020] Figure 4 The utility model is a partial structural schematic diagram of a residual material recovery mechanism in a methanol distillation tower with a residual material recovery function.

[0021] Figure 5 The utility model is a partial cross-sectional schematic diagram of a residual material recovery mechanism in a methanol distillation tower with a residual material recovery function.

[0022] In the figure, 100-distillation tower body, 101-tower body, 102-feed pipe, 103-gas-liquid reflux pipe 2, 104-liquid reflux pipe 2, 105-gas reflux pipe, 106-liquid-gas reflux pipe, 107-liquid guide pipe, 108-tower plate, 109-gas phase hole, 110-liquid temporary storage tank, 111-overflow liquid guide pipe;

[0023] 200-residual material recovery mechanism, 201-reboiler, 202-gas-liquid reflux pipe 1, 203-liquid reflux pipe 1, 204-check valve, 205-residual material filter pipe, 206-filter plate 1, 207-recovery pipe 1, 208-filter plate 2, 209-recovery pipe 2;

[0024] 300-Condenser assembly. DETAILED DESCRIPTION

[0025] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0026] See also Figures 1 to 5 The utility model provides a technical solution: a methanol distillation tower with a residual material recovery function, comprising: a distillation tower body 100, a residual material recovery mechanism 200 and a condenser assembly 300. The residual material recovery mechanism 200 for filtering and recovering the residual material and stripping the liquid phase is provided at the lower left end of the distillation tower body 100;

[0027] A condenser assembly 300 for condensing and circulating the gas phase is provided at the upper right end of the distillation tower body 100. A tower body 101 is provided in the middle of the internal structure of the distillation tower body 100. Inside the tower body 101 are several groups of trays 108 for close contact between the gas and liquid phases.

[0028] The upper right end of the residual material recovery mechanism 200 is provided with a recovery pipe 207 for recovering and guiding the residual material, and the lower part of the recovery pipe 207 is provided with a recovery pipe 209 for recovering and guiding the residual material.

[0029] A residual material filtering pipe 205 is provided on the left side of the recovery pipe 207, and a filter plate 206 for preliminary filtering of the residual material is provided at the inner bending part of the residual material filtering pipe 205.

[0030] A filter plate 2 208 for secondary filtration of the residual material is provided on the lower left side of the filter plate 1 206. The right sides of the filter plate 1 206 and the filter plate 2 208 are vertically penetrated to form a plurality of groups of filter holes equally distributed in a circle. The diameters of the filter holes of the filter plate 1 206 and the filter plate 2 208 decrease in sequence. The large particles in the liquid phase can be filtered out through the filter holes in the filter plate 1 206 and the filter plate 2 208, and the two groups of filter holes with different diameters can group the filtered particles.

[0031] A liquid phase reflux pipe 203 is provided above the residual material filtering pipe 205, and a one-way valve 204 is provided on the inside of the liquid phase reflux pipe 203 for preventing liquid phase reflux. The liquid phase is introduced into the liquid phase reflux pipe 203 through the liquid phase reflux pipe 2 104 and then flows into the inside of the residual material filtering pipe 205. After the residual material is filtered, it can be prevented from backflowing through the one-way valve 204.

[0032] A transition pipe is provided on the left side of the residual material filtering pipe 205, a reboiler 201 is provided on the upper left side of the transition pipe, a gas-liquid reflux pipe 1 202 is provided above the reboiler 201, and a liquid reflux pipe 2 104 is provided at the lower end of the tower body 101;

[0033] A gas-liquid reflux pipe 2 103 is provided at the lower left end of the tower body 101 , and the gas-liquid reflux pipe 1 202 and the gas-liquid reflux pipe 2 103 , and the liquid phase reflux pipe 1 203 and the liquid phase reflux pipe 2 104 are all connected and fixed by bolts.

[0034] See also Figure 1-Figure 2 and Figure 4-Figure 5 As the first embodiment of the present utility model: First, the user connects and fixes the gas-liquid reflux pipe 1 202 and the liquid phase reflux pipe 1 203 in the residual material recovery mechanism 200 with the gas-liquid reflux pipe 2 103 and the liquid phase reflux pipe 2 104 in the distillation tower body 100 respectively through bolts. The liquid phase at the lower inner side of the tower body 101 enters the residual material filter pipe 204 through the liquid phase reflux pipe 2 104 and the liquid phase reflux pipe 1 203, and is filtered twice through the filter holes in the filter plate 1 206 and the filter plate 2 208. The two groups of filter holes with different diameters can group the filtered particles. Secondly, after the residual material is filtered, the one-way valve 204 can be used to prevent it from backflowing, and the filtered residual material can be recovered through the recovery pipe 1 207 and the recovery pipe 2 208, thereby achieving the effect of residual material recovery.

[0035] A feed pipe 102 for introducing raw materials into the inside of the tower body 101 is provided in the middle position on the left side of the tower body 101, a gas reflux pipe 105 is provided at the upper end of the tower body 101, and a liquid-gas reflux pipe 106 is provided at the upper right end of the tower body 101.

[0036] A liquid guide pipe 107 is provided at the upper right end of the inner side of the tower body 101 , a liquid temporary storage tank 110 is provided on the upper surface of the tower plate 108 , and a plurality of gas phase holes 109 are opened on the upper surface of the tower plate 108 and distributed equally around the circumference.

[0037] An overflow liquid guide pipe 111 is provided on the left side of the tower plate 108. The lower end of the overflow liquid guide pipe 111 is located directly above the lower tower plate 108. The condensed gas phase flows downward and contacts the vaporized liquid phase layer by layer, which can improve the degree of distillation.

[0038] See also Figure 1-Figure 3As the second embodiment of the present invention: Based on the above-mentioned first embodiment, first, the raw gas phase rises and enters the condenser assembly 300 through the gas phase reflux pipe 105, and then enters the inner side of the tower body 101 through the liquid-gas reflux pipe 106 after liquefaction. Secondly, the liquefied gas phase enters the uppermost tower plate 108 through the liquid guide pipe 107 and accumulates in the liquid temporary storage tank 110. After the accumulation reaches a certain height, it will overflow and then be introduced into the lower tower plate 108 through the overflow liquid guide pipe 111. The vaporized liquid phase rises and contacts with the liquefied gas phase in the tower plate 108, thereby improving the degree of distillation.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A methanol distillation tower with a residual material recovery function, comprising: A distillation tower body (100), a residual material recovery mechanism (200) and a condenser assembly (300), characterized in that: a residual material recovery mechanism (200) for filtering and recovering residual material and stripping the liquid phase is provided at the lower left end of the distillation tower body (100); A condenser assembly (300) for condensing and circulating the gas phase is provided at the upper right end of the distillation tower body (100). A tower body (101) is provided in the middle of the internal composition of the distillation tower body (100). A plurality of trays (108) for close contact between the gas and liquid phases are provided inside the tower body (101). The upper right end of the residual material recovery mechanism (200) is provided with a recovery pipe 1 (207) for recovering and guiding the residual material, and a recovery pipe 2 (209) for recovering and guiding the residual material is provided below the recovery pipe 1 (207).

2. The methanol distillation tower with residual material recovery function according to claim 1, characterized in that: A residual material filtering pipe (205) is provided on the left side of the recovery pipe (207), and a filter plate (206) for primary filtering of the residual material is provided at the inner bending part of the residual material filtering pipe (205).

3. A methanol distillation tower with a residual material recovery function as claimed in claim 2, characterized in that: A filter plate 2 (208) for secondary filtration of the residual material is provided on the lower left side of the filter plate 1 (206). The right sides of the filter plate 1 (206) and the filter plate 2 (208) are vertically penetrated to form a plurality of groups of filter holes equally distributed in a circle. The diameters of the filter holes of the filter plate 1 (206) and the filter plate 2 (208) decrease in sequence.

4. A methanol distillation tower with a residual material recovery function as claimed in claim 3, characterized in that: A liquid phase reflux pipe (203) is provided above the residual material filtering pipe (205), and a one-way valve (204) for preventing liquid phase reflux is provided inside the liquid phase reflux pipe (203).

5. The methanol distillation tower with residual material recovery function according to claim 4, characterized in that: A transition pipe is provided on the left side of the residual material filtering pipe (205), a reboiler (201) is provided on the upper left side of the transition pipe, a gas-liquid reflux pipe 1 (202) is provided above the reboiler (201), and a liquid reflux pipe 2 (104) is provided at the lower end of the tower body (101); A gas-liquid reflux pipe 2 (103) is provided at the lower left end of the tower body (101), and the gas-liquid reflux pipe 1 (202) and the gas-liquid reflux pipe 2 (103), and the liquid phase reflux pipe 1 (203) and the liquid phase reflux pipe 2 (104) are all connected and fixed by bolts.

6. The methanol distillation tower with residual material recovery function according to claim 1, characterized in that: A feed pipe (102) for introducing raw materials into the inner side of the tower body (101) is provided at the middle position on the left side of the tower body (101), a gas phase reflux pipe (105) is provided at the upper end of the tower body (101), and a liquid-gas reflux pipe (106) is provided at the upper right end of the tower body (101).

7. The methanol distillation tower with residual material recovery function according to claim 1, characterized in that: A liquid guide pipe (107) is provided at the upper right end of the inner side of the tower body (101), a liquid temporary storage tank (110) is provided on the upper surface of the tower plate (108), and a plurality of gas phase holes (109) are opened on the upper surface of the tower plate (108) and are evenly distributed in a circumference.

8. The methanol distillation tower with residual material recovery function according to claim 7, characterized in that: An overflow liquid guide pipe (111) is provided on the left side of the tower plate (108), and the lower end of the overflow liquid guide pipe (111) is located directly above the lower tower plate (108).

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