Trioctyl trimellitate rectification recovery device

Abstract

The utility model belongs to the technical field of recovery and application of trioctyl trimellitate, and particularly discloses a rectification recovery device for trioctyl trimellitate. Comprising a rectifying still, a rectifying tower, an air inlet pipe with a valve, a refrigeration cycle generator, a pedestal plate, an air extracting pump, an air outlet pipe with a valve, vertical supporting legs, a lower sealing head, a liquid outlet pipe with a valve, a plurality of hollow transition shells, an upper sealing head, a cold air inlet pipe, a cold air outlet pipe, a pipe bundle condensation part, a cold air inlet transition pipe, a cold air outlet air distribution pipe and a cold air inlet air distribution pipe. And a flow rotation control valve and a transition shell. The device disclosed by the utility model has the beneficial effects that 1, the device can be used for carrying out different and multi-stage heat exchange condensation environment control on rectification hot steam in a recovery process, so that efficient and high-quality rectification recovery of trioctyl trimellitate is realized; 2, the whole component parts are of a split design structure and are convenient to assemble, disassemble and maintain, and meanwhile, the whole component parts adopt a skid-mounted and vertical design, so that the transportation is convenient, and the occupied area is small;

Description

Technical Field

[0001] The utility model belongs to the technical field of trioctyl trimellitate recovery and application, and specifically relates to a trioctyl trimellitate distillation recovery device. Background Art

[0002] Trioctyl trimellitate is a transparent, viscous, oily liquid with a slight odor and is soluble in most organic solvents. It is a heat-resistant and durable plasticizer suitable for a variety of plastics such as polyvinyl chloride, vinyl chloride copolymers, nitrocellulose, ethyl cellulose, and polymethyl methacrylate.

[0003] In its application or production, in order to save economic costs, it will be recycled and reused. In the recycling process, there is a distillation step for high-quality recovery of the raw material liquid containing trioctyl trimellitate, which requires the use of a condenser to condense the trioctyl trimellitate vapor after heating and distillation. The traditional condenser has low heat exchange condensation efficiency and is also inconvenient to dismantle and maintain.

[0004] Therefore, based on the above problems, the utility model provides a device for distillation and recovery of trioctyl trimellitate. Utility Model Content

[0005] Purpose of the utility model: The purpose of the utility model is to provide a device for distillation and recovery of trioctyl trimellitate in view of the deficiencies in the prior art, which solves the technical problems existing in the traditional condenser used for distillation and recovery of trioctyl trimellitate in the background technology.

[0006] Technical solution: The utility model provides a device for the distillation and recovery of trioctyl trimellitate, comprising a distillation kettle, a distillation tower, an air inlet pipe with a valve, a refrigeration cycle generator and a base plate, wherein the base plate is provided with an air pump, and the air pump is provided with an air outlet pipe with a valve, and the base plate is provided with a vertical support leg between the refrigeration cycle generator and the air pump, and the vertical support leg is provided with a lower head, and the lower head is provided with a liquid outlet pipe with a valve, and a plurality of hollow transition shells are vertically stacked on the lower head, and the upper end surface of the hollow transition shell is provided with an upper head connected to the air outlet pipe with a valve, and the A cold air inlet pipe and a cold air outlet pipe are symmetrically arranged in the middle of the hollow transition shell, and a tube bundle condensation part connected to the cold air inlet pipe and the cold air outlet pipe is arranged in the hollow transition shell, and a cold air inlet transition pipe and a cold air outlet air distribution pipe are arranged on the cold air inlet pipe and the cold air outlet pipe, respectively. One end of the cold air inlet transition pipe is connected to the cold air inlet air distribution pipe, and a flow rotation control valve is arranged on the cold air inlet transition pipe. A transition shell is arranged on the inner wall of the hollow transition shell and below the tube bundle condensation part; wherein the cold air inlet air distribution pipe and the cold air outlet air distribution pipe are respectively connected to the refrigeration cycle generator.

[0007] In the technical solution, the distillation recovery device for trioctyl trimellitate also includes a first mounting seat and a second mounting seat respectively arranged on the upper head and the lower head, and a first temperature sensor and a second temperature sensor respectively arranged on the first mounting seat and the second mounting seat.

[0008] The technical solution of the present invention is to provide a device for distilling and recovering trioctyl trimellitate, and further comprises an upper head flange, a lower head flange, and a hollow transition shell flange, which are respectively arranged on the upper head, the lower head, and the hollow transition shell, and nuts and bolts are used to fix and assemble the upper head, the lower head, and the hollow transition shell through the upper head flange, the lower head flange, and the hollow transition shell flange, respectively.

[0009] In the technical solution, the device for distillation and recovery of trioctyl trimellitate also includes a circular hollow fixing sleeve symmetrically arranged on the outer wall of the middle part of the hollow transition shell, and a boss-type hollow flexible sealing plug used in conjunction with the circular hollow fixing sleeve.

[0010] In the technical solution of the present invention, the transition shell is configured as a funnel-shaped structure.

[0011] In the technical solution, the vacuum pump includes but is not limited to a steam pump.

[0012] Compared with the prior art, the beneficial effects of the distillation recovery device for trioctyl trimellitate of the utility model are: 1. It can be used to perform different and multi-stage heat exchange condensation environment control on the distillation hot steam in the recovery process, so as to realize efficient and high-quality distillation recovery of trioctyl trimellitate; 2. The overall components are of split design structure, which is convenient for assembly and disassembly. At the same time, the overall skid-mounted and vertical design is adopted, which is convenient for transportation and occupies a small area. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art,

[0014] The drawings required for use in the examples are briefly introduced. 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.

[0015] Figure 1 This is a schematic structural diagram of a device for distilling and recovering trioctyl trimellitate of the utility model;

[0016] Figure 2It is a structural schematic diagram of an upper head, a lower head, a hollow transition shell, an upper head flange, a lower head flange, a hollow transition shell flange and nuts and bolts, etc., used in a trioctyl trimellitate distillation recovery device of the utility model;

[0017] Figure 3 It is a structural schematic diagram of a cold air inlet pipe, a cold air outlet pipe, a tube bundle condensation part, a cold air inlet transition pipe, a cold air outlet distribution pipe and a flow rate rotary control valve used in a trioctyl trimellitate distillation recovery device of the utility model;

[0018] Among them, the serial numbers in the figure are as follows: 10-first round rod fixing sleeve, 11-second round rod fixing sleeve, 12-second fixing pin, 13-first fixing pin, 14-first round rod fixing sleeve through hole, 15-first round rod fixing sleeve through hole, 16-fixed ear plate with hole, 17-fixed ear seat with hole, 18-third pin hole, 19-third pin, 20-fixed block, 21-circlip, 22-support screw with convex head, 23-spring, 24-bucket type fixing seat, 101-first mounting groove, 102-limiting protrusion, 111-second mounting groove, 201-limiting slot, 202-fixed block pin hole, 241-circular fixed part with hole. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top end", "bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 a limitation of the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the 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. Embodiment 1

[0021] like Figure 1 , Figure 2 and Figure 3 The device for distilling and recovering trioctyl trimellitate shown in the figure comprises a distillation kettle 100, a distillation tower 101, an air inlet pipe 102 with a valve, a refrigeration cycle generator 103 and a base plate 200.

[0022] An air pump 201 is provided on the base plate 200.

[0023] The air pump 201 is provided with an air outlet pipe 205 with a valve.

[0024] A vertical support leg 202 is provided on the base plate 200 and between the refrigeration cycle generator 103 and the vacuum pump 201.

[0025] A lower head 223 is provided on the vertical support leg 202.

[0026] The lower sealing head 223 is provided with a liquid outlet pipe 203 with a valve.

[0027] A plurality of hollow transition shells 210 are vertically stacked on the lower head 223.

[0028] The upper end surface of the hollow transition shell 210 is provided with an upper head 204 connected to the air outlet pipe 205 with a valve.

[0029] A cold air inlet pipe 218 and a cold air outlet pipe 220 are symmetrically arranged in the middle of the hollow transition shell 210.

[0030] The hollow transition shell 210 is provided with a tube bundle condensation portion 219 connected to the cold air inlet pipe 218 and the cold air outlet pipe 220.

[0031] The cold air inlet pipe 218 and the cold air outlet pipe 220 are respectively provided with a cold air inlet transition pipe 216 and a cold air outlet air distribution pipe 221.

[0032] One end of the cold air inlet transition pipe 216 is connected to the cold air inlet air distribution pipe 215.

[0033] The cold air inlet transition pipe 216 is provided with a flow rate rotary control valve 217 (the flow rate rotary control valve 217 can control the cold air inlet amount, and finally achieve the purpose of controlling the temperature of the tube bundle condensation part 219, and realize the vertical multi-stage, step-by-step distillation heat exchange condensation recovery of trioctyl trimellitate).

[0034] A transition shell 222 is disposed on the inner wall of the hollow transition shell 210 and below the tube bundle condensation portion 219;

[0035] Among them, the cold air inlet distribution pipe 215 and the cold air outlet distribution pipe 221 are respectively connected to the refrigeration cycle generator 103, the distillation kettle 100 and the distillation tower 101 perform preliminary treatment on the trioctyl trimellitate to be recovered, and enter the tower shell composed of the upper head 204, the lower head 223, and several hollow transition shells 210 through the vacuum pump 201 and the valved outlet pipe 205. By cooperating with the refrigeration cycle generator 103, the cold air inlet distribution pipe 215, the cold air outlet distribution pipe 221, and the cold air inlet transition pipe 216, the tube bundle condensation part 219 located in the several hollow transition shells 210 performs vertical multi-stage or multi-stage stepped heat exchange condensation treatment, and then is discharged into the collection tank through the valved liquid outlet pipe 203. Embodiment 2

[0036] On the basis of the first embodiment, the device for distillation and recovery of trioctyl trimellitate further includes a first mounting seat 207 and a second mounting seat 206 respectively arranged on the upper head 204 and the lower head 223, and a first temperature sensor 208 and a second temperature sensor 209 respectively arranged on the first mounting seat 207 and the second mounting seat 206;

[0037] Among them, the first temperature sensor 208 is used to monitor and display the temperature of the distillation steam, and the second temperature sensor 209 is used to monitor and display the temperature of the distillation liquid. In addition, the first temperature sensor 208 and the second temperature sensor 209 can also be connected to the PLC control unit respectively to realize intelligent control. For example, when the temperature values ​​of the first temperature sensor 208 and the second temperature sensor 209 do not meet the preset values, the PLC control unit can issue an early warning or control the vacuum pump 201, the distillation kettle 100, the refrigeration cycle generator 103, etc. to stop working (the PLC control unit is not marked in the figure and does not affect the disclosure of the technical solution of this application). Embodiment 3

[0038] On the basis of Example 1 or Example 2, a device for distilling and recovering trioctyl trimellitate further includes an upper head flange 212, a lower head flange 213, and a hollow transition shell flange 211, which are respectively arranged on the upper head 204, the lower head 223, and the hollow transition shell 210, and nut bolts 214 with nuts and bolts for fixing and assembling the upper head 204, the lower head 223, and the hollow transition shell 210 through the upper head flange 212, the lower head flange 213, and the hollow transition shell flange 211, respectively. Multiple hollow transition shells 210 can be installed according to actual conditions. At the same time, the above-mentioned structure as a whole is a split multi-section combination design, which is convenient for assembly or disassembly, and is also conducive to the subsequent cleaning and maintenance of the tube bundle condensation part 219. Embodiment 4

[0039] On the basis of the first embodiment, the second embodiment or the third embodiment, the device for distilling and recovering trioctyl trimellitate further comprises a circular hollow fixing sleeve 224 symmetrically arranged on the outer wall of the middle part of the hollow transition shell 210, and a boss-type hollow flexible sealing plug 225 used in conjunction with the circular hollow fixing sleeve 224;

[0040] Among them, the boss-type hollow flexible sealing plug 225 is respectively mounted on the cold air inlet pipe 218 and the cold air outlet pipe 220, and one side is respectively embedded in the circular hollow fixed sleeve 224. The above-mentioned design structure facilitates the assembly / disassembly of the cold air inlet pipe 218 and the cold air outlet pipe 220. The other ends of the cold air inlet pipe 218 and the cold air outlet pipe 220 are respectively detachable structures between the tube bundle condensation part 219.

[0041] In addition, the preferred transition shell 222 is configured as a funnel-shaped structure; wherein the transition shell 222 serves to block the downward flow of trioctyl trimellitate distillation, thereby prolonging the heat exchange condensation time.

[0042] In addition, the preferred vacuum pump 201 includes but is not limited to a steam pump, which is suitable for conveying distillation hot steam.

[0043] The working principle or structural principle of the trioctyl trimellitate distillation recovery device of this structure is as follows:

[0044] (1) Start the vacuum pump 201. Then, the vapor of trioctyl trimellitate to be recovered after being processed by the distillation kettle 100 and the distillation tower 101 enters into the plurality of hollow transition shells 210 through the valved air inlet pipe 102 and the valved air outlet pipe 205;

[0045] (2) Start the refrigeration cycle generator 103, and the cold air enters the tube bundle condenser 219 through the cold air inlet distribution pipe 215, the cold air inlet transition pipe 216, and the cold air inlet pipe 218. The tube bundle condenser 219 and the trioctyl trimellitate vapor to be recovered undergo multiple vertical heat exchange condensations. At this time, the cold air circulates through the cold air outlet pipe 220 and the cold air outlet distribution pipe 221 and enters the refrigeration cycle generator 103;

[0046] (3) The trioctyl trimellitate liquid after distillation and condensation is discharged through the liquid outlet pipe 203 with a valve for recovery and collection.

[0047] In the trioctyl trimellitate distillation recovery device of the present structure, the distillation kettle 100, the distillation tower 101 and the refrigeration cycle generator 103 are all conventional components or equipment, and no improvement is made in the present technical solution.

[0048] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0049] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A device for distilling and recovering trioctyl trimellitate, comprising a distillation kettle (100), a distillation tower (101), An air inlet pipe (102) with a valve, a refrigeration cycle generator (103) and a base plate (200), characterized in that: The base plate (200) is provided with an air pump (201). The air pump (201) is provided with an air outlet pipe (205) with a valve. A vertical support leg (202) is provided on the base plate (200) and is located between the refrigeration cycle generator (103) and the vacuum pump (201). The vertical support leg (202) is provided with a lower sealing head (223). The lower sealing head (223) is provided with a liquid outlet pipe (203) with a valve. A plurality of hollow transition shells (210) are vertically stacked on the lower head (223). The upper end surface of the hollow transition shell (210) is provided with an upper sealing head (204) connected to the air outlet pipe (205) with a valve. A cold air inlet pipe (218) and a cold air outlet pipe (220) are symmetrically arranged in the middle of the hollow transition shell (210). The hollow transition shell (210) is provided with a tube bundle condensation portion (219) connected to the cold air inlet pipe (218) and the cold air outlet pipe (220). The cold air inlet pipe (218) and the cold air outlet pipe (220) are respectively provided with a cold air inlet transition pipe (216) and a cold air outlet distribution pipe (221). One end of the cold air intake transition pipe (216) is respectively connected to a cold air intake air distribution pipe (215). The cold air inlet transition pipe (216) is provided with a flow rate rotation control valve (217) respectively, and the inner wall of the hollow transition shell (210) is provided with a transition shell (222) below the tube bundle condensation part (219); The cold air inlet air distribution pipe (215) and the cold air outlet air distribution pipe (221) are respectively connected to the refrigeration cycle generator (103).

2. The device for distilling and recovering trioctyl trimellitate according to claim 1, characterized in that: The device for distilling and recovering trioctyl trimellitate further comprises a first mounting seat (207) and a second mounting seat (206) respectively arranged on the upper head (204) and the lower head (223), and a first temperature sensor (208) and a second temperature sensor (209) respectively arranged on the first mounting seat (207) and the second mounting seat (206).

3. The device for distilling and recovering trioctyl trimellitate according to claim 2, characterized in that: The device for distilling and recovering trioctyl trimellitate also includes an upper head flange (212), a lower head flange (213), and a hollow transition shell flange (211) which are respectively arranged on the upper head (204), the lower head (223), and the hollow transition shell (210), and bolts with nuts (214) which are respectively used to fix and assemble the upper head (204), the lower head (223), and the hollow transition shell (210) via the upper head flange (212), the lower head flange (213), and the hollow transition shell flange (211).

4. The device for distilling and recovering trioctyl trimellitate according to claim 3, characterized in that: The device for distilling and recovering trioctyl trimellitate further comprises a circular hollow fixing sleeve (224) symmetrically arranged on the outer wall of the middle portion of the hollow transition shell (210), and a boss-type hollow flexible sealing plug (225) used in conjunction with the circular hollow fixing sleeve (224).

5. The device for distillation recovery of trioctyl trimellitate according to claim 1, characterized in that: The transition shell (222) is configured as a funnel-shaped structure.

6. The device for distillation recovery of trioctyl trimellitate according to claim 1, characterized in that: The vacuum pump (201) includes but is not limited to a steam pump.

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