CN211536582U

CN211536582U - A five processing systems of carbon for in maleic anhydride is synthetic

Info

Publication number: CN211536582U
Application number: CN201922392490.5U
Authority: CN
Inventors: 储家逸; 王海斌
Original assignee: Jiaxing Nanyang Wanshixing Chemical Co ltd
Current assignee: Jiaxing Nanyang Wanshixing Chemical Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-09-22
Anticipated expiration: 2029-12-26

Abstract

The utility model relates to the field of waste gas treatment, in particular to a carbon five treatment system used in maleic anhydride synthesis, which comprises a reaction kettle, wherein the reaction kettle is communicated with a carbon five recovery body which is communicated with a waste gas catalytic oxidation device; the five-carbon recovery body is communicated with a five-carbon raw material storage tank; the five-carbon recovery body is communicated with a liquid nitrogen tank for storing a heat exchange medium; the fifth carbon recovery body comprises a first fifth carbon recovery unit, a second fifth carbon recovery unit and a third fifth carbon recovery unit, and the first fifth carbon recovery unit is communicated with a first liquid pump; the first carbon five recovery unit is communicated with the second liquid pump; the second carbon five recovery unit is communicated with a third liquid pump. The utility model discloses have and effectively retrieve the carbon five in the waste gas, collect the carbon five that obtains and can directly regard as the raw materials to use, practiced thrift manufacturing cost, improved resource utilization's effect. The problem of prior art have five tail gas treatment effect of carbon relatively poor, reuse rate is lower is solved.

Description

A five processing systems of carbon for in maleic anhydride is synthetic

Technical Field

The utility model belongs to the technical field of exhaust-gas treatment and specifically relates to a five processing system of carbon that is arranged in maleic anhydride synthesis is related to.

Background

The product of the methyl tetrahydrophthalic anhydride is a liquid anhydride epoxy resin curing agent, and is suitable for processes of epoxy resin potting materials, castable, encapsulating materials and the like in products of the electrical industry and the electromechanical industry, and for packaging electronic devices such as output transformers, capacitors, transformers and the like, LED packaging and petroleum conveying pipelines. In the production process of the methyltetrahydrophthalic anhydride, carbon five (main effective components are piperylene and isoprene) and maleic anhydride are used as raw materials, and the methyltetrahydrophthalic anhydride is obtained through diene synthesis, isomerization and reduced pressure distillation. And a carbon five tail gas emission system is arranged in the carbon five storage, loading and unloading and production process carbon five conveying process.

Notification CN 205549956U's a carbon five fractionation equipment vacuum pump tail gas recovery unit includes: the tail gas recovery system comprises a heat exchanger, a condensate receiving tank and a recovery pump, wherein a heat exchanger connecting pipe is connected with a tail gas output pipeline of a vacuum pump, a liquid outlet of the heat exchanger is connected with the condensate receiving tank, and the condensate receiving tank is connected to the recovery pump through an output pipeline; the temperature of the low-temperature water introduced into the heat exchanger is not more than 5 ℃.

The solutions of the prior art cited above have the following drawbacks: although part of the carbon five components in the tail gas are recovered, the impurities in the recovered carbon five are too high to be reused; if the waste gas is reused as raw material, the waste gas needs to be processed again, the production cost is increased, the waste gas treated by the heat exchanger still contains VOC waste gas, and the emission affects the surrounding environment. In conclusion, the prior art has the problems of poor treatment effect and low reutilization rate of the carbon five tail gas.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, one of the purposes of the utility model is to provide a five processing system of carbon for in the maleic anhydride is synthetic, can effectively retrieve five carbon in the waste gas, collect five carbon that obtain and can directly regard as the raw materials to use, practiced thrift manufacturing cost, improved resource utilization.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: a carbon five treatment system used in the synthesis of maleic anhydride comprises a reaction kettle, wherein the reaction kettle is communicated with a carbon five recovery body, and the carbon five recovery body is communicated with a waste gas catalytic oxidation device; the five-carbon recovery body is communicated with a five-carbon raw material storage tank; the five-carbon recovery body is communicated with a liquid nitrogen tank for storing a heat exchange medium; the fifth carbon recovery body comprises a first fifth carbon recovery unit, a second fifth carbon recovery unit communicated with the first fifth carbon recovery unit and a third fifth carbon recovery unit connected with the second fifth carbon recovery unit in series, and a first liquid pump is communicated between the first fifth carbon recovery unit and the reaction kettle; a second liquid pump is communicated between the first carbon five recovery unit and the second carbon five recovery unit; and a third liquid pump is communicated between the second carbon five recovery unit and the third carbon five recovery unit.

By adopting the technical scheme, after the isomerization reaction materials in the reaction kettle are analyzed to be qualified, the materials are cooled to the normal discharge temperature of reduced pressure distillation, then the materials are moved into the first carbon five recovery unit through the first liquid pump to be subjected to reduced pressure distillation, distillation components are collected and detected, if the purity of the obtained carbon five components is qualified, the obtained carbon five components flow into the carbon five raw material storage tank for standby, if the purity of the obtained carbon five components is unqualified, the carbon five components in the first carbon five recovery unit are pumped into the second carbon five recovery unit to be subjected to reduced pressure distillation again, the purity of the carbon five components in the second carbon five recovery unit is detected, and if the purity of the obtained carbon five components reaches the standard, the obtained carbon five components flow into the carbon five raw material storage tank; if the carbon five component in the second carbon five recovery unit is unqualified, pumping the carbon five component in the second carbon five recovery unit to a third carbon five recovery unit for carrying out reduced pressure distillation again, detecting the purity of the carbon five component, and collecting the carbon five component to a carbon five raw material storage tank for later use when the carbon five component reaches the standard, thereby completing the recycling of the carbon five component in the waste gas; the part waste gas that does not condense can flow to waste gas catalytic oxidation device, decomposes into carbon dioxide and water under waste gas catalytic oxidation device effect, and after reaching the ring row standard, it is external to discharge into, the utility model discloses effectively retrieve the carbon five in the waste gas, collect the carbon five that obtains and can directly regard as the raw materials to use, practiced thrift manufacturing cost, improved resource utilization.

The present invention may be further configured in a preferred embodiment as: the first carbon five recovery unit comprises a first reduced pressure distillation kettle communicated with the reaction kettle; the first reduced pressure distillation kettle is communicated with a first condenser communicated with a liquid nitrogen tank; a liquid outlet of the first condenser is communicated with a first collecting tank communicated with the carbon five-raw material storage tank; the first collecting tank is communicated with a first detection liquid outflow pipe; the air outlet of the first condenser is communicated with a waste gas catalytic oxidation device; the first condenser cooling medium inlet is communicated with the liquid nitrogen tank, and the first condenser cooling medium outlet is communicated with the second carbon five recovery unit; a liquid nitrogen pump is arranged between the liquid nitrogen tank and the first condenser.

By adopting the technical scheme, reduced pressure distillation is carried out in the first reduced pressure distillation kettle, the fraction generated by the first reduced pressure distillation kettle flows to the first condenser, and liquid nitrogen exchanges heat with the fraction, so that the condensation of most of the carbon five components flows to the first collecting tank from the liquid outlet of the first condenser; collecting five carbon components in the first collecting tank through a first detection liquid outflow pipe, analyzing the purity of the collected five carbon components through an instrument, and enabling the five carbon components in the first collecting tank to flow to a five carbon raw material storage tank for storage for later use if the collected five carbon components are detected to be qualified; if the detection is unqualified, a second liquid pump is started, the five-carbon component in the first collecting tank is pumped into a second reduced pressure distillation kettle for reduced pressure distillation, the purity of the collected five-carbon component is ensured, the five-carbon component in the five-carbon raw material storage tank can be directly used as a raw material for preparing the methyl tetrahydrophthalic anhydride, and the production cost can be reduced.

The present invention may be further configured in a preferred embodiment as: the second carbon five recovery unit comprises a second reduced pressure distillation kettle communicated with the first collecting tank; the second reduced pressure distillation kettle is communicated with a second condenser communicated with the first condenser; the second condenser cooling medium inlet is communicated with the first condenser cooling medium outlet; a liquid outlet of the second condenser is communicated with a second collecting tank communicated with the carbon five-raw material storage tank; the second collecting tank is communicated with a second detection liquid outflow pipe; the air outlet of the second condenser is communicated with a waste gas catalytic oxidation device; and the outlet of the cooling medium of the second condenser is communicated with the third carbon five recovery unit.

By adopting the technical scheme, the fraction generated by the second reduced pressure distillation kettle flows to the second condenser, and the liquid nitrogen exchanges heat with the fraction, so that the condensation of most of the carbon five components flows to the second collecting tank from the liquid outlet of the second condenser; collecting the five carbon components in the second collecting tank through a second detection liquid outflow pipe, analyzing the purity of the collected five carbon components through an instrument, and if the collected five carbon components are detected to be qualified, starting a fifth ball valve to enable the five carbon components in the second collecting tank to flow to a five carbon raw material storage tank for storage and standby; and if the detection result is unqualified, a third liquid pump is started, the carbon five-component in the second collecting tank is pumped into a third reduced pressure distillation kettle for reduced pressure distillation again, the purity of the collected carbon five-component is further ensured, the carbon five-component in the carbon five-component raw material storage tank can be directly used as a raw material for preparing the methyl tetrahydrophthalic anhydride, and the production cost is further reduced.

The present invention may be further configured in a preferred embodiment as: the third carbon five recovery unit comprises a third reduced pressure distillation kettle communicated with the second collecting tank; the third reduced pressure distillation kettle is communicated with a third condenser communicated with the second condenser; the third condenser cooling medium inlet is communicated with the second condenser cooling medium outlet; a liquid outlet of the third condenser is communicated with a third collecting tank communicated with the carbon five-raw material storage tank; the third collecting tank is communicated with a third detection liquid outflow pipe; the air outlet of the third condenser is communicated with a waste gas catalytic oxidation device.

By adopting the technical scheme, reduced pressure distillation is carried out in the third reduced pressure distillation kettle, and liquid nitrogen exchanges heat with fractions, so that most of the condensed carbon five components flow to the third collecting tank from the liquid outlet of the third condenser; five components of carbon in collecting the third collecting vat through the third detection liquid outlet pipe, five components of carbon of collection pass through instrument analysis purity, guarantee that five groups of carbon purity is up to standard (it is necessarily qualified to obtain the component purity according to the production experience of many years to obtain the cubic vacuum distillation, the third that sets up in order to avoid makeing mistakes detects the purity that the liquid outlet pipe detected five components of carbon), five groups of carbon purity is up to standard, five components of carbon flow direction five raw materials hold up tank in the third collecting vat stores for use, cubic vacuum distillation can effectively guarantee the purity of five components of carbon of collection, satisfy preparation methyl tetrahydrophthalic anhydride raw materials purity demand, manufacturing cost is reduced.

The present invention may be further configured in a preferred embodiment as: the cooling medium outlet of the third condenser is communicated with a nitrogen recovery tank; a temperature detector is arranged in the nitrogen recovery tank.

By adopting the technical scheme, the purposes of recycling the nitrogen and improving the utilization rate of the nitrogen are achieved; the temperature of nitrogen gas in the nitrogen gas recovery tank can be mastered through the temperature detector, and if the temperature of the nitrogen gas is lower than the outdoor temperature, the nitrogen gas can be used for preparing cooling water for cooling materials, so that the efficient utilization of liquid nitrogen resources is guaranteed.

The present invention may be further configured in a preferred embodiment as: a first heat preservation pipe is communicated between the first condenser cooling medium outlet and the second condenser cooling medium inlet; and a second heat preservation pipe with the same structure as the first heat preservation pipe is communicated between the second condenser cooling medium outlet and the third condenser cooling medium inlet.

Through adopting above-mentioned technical scheme, reduce the liquid nitrogen and change the industry in-process from external absorbing heat between first condenser, second condenser and third condenser outer wall, guarantee the heat exchange efficiency of nitrogen gas, the five ingredients of carbon in the efficient recovery waste gas improve the utilization of liquid nitrogen resources and the resource utilization rate of five ingredients of carbon, reduction in production cost.

The present invention may be further configured in a preferred embodiment as: the outer wall of the first heat-preservation pipe is coated with a heat-preservation coating; the first heat-preservation pipe is circumferentially coated on the heat-preservation cotton layer; the heat preservation cotton layer is coated with a protection pipe.

Through adopting above-mentioned technical scheme, further reduce the liquid nitrogen and change the industry in-process from external absorbing heat between first condenser, second condenser and third condenser outer wall, guarantee the heat exchange efficiency of nitrogen gas, the five composition of carbon in the efficient recovery waste gas improves the resource utilization ratio of liquid nitrogen utilization and five composition of carbon, reduction in production cost.

The present invention may be further configured in a preferred embodiment as: and the outer walls of the first condenser, the second condenser and the third condenser are coated with heat-insulating layers.

Through adopting above-mentioned technical scheme, reduced first condenser, second condenser and third condenser and absorbed the heat from the external world, prevented that the nitrogen gas temperature as the heat transfer agent from rising, lead to the heat exchange efficiency to descend, lead to the five component recovery volumes of carbon in the waste gas to reduce.

To sum up, the utility model discloses a following beneficial technological effect:

the reaction kettle, the carbon five recovery body, the waste gas catalytic oxidation device, the liquid nitrogen tank and the nitrogen recovery tank are used for effectively recovering the carbon five in the waste gas, and the collected carbon five can be directly used as a raw material, so that the production cost is saved, and the resource utilization rate is improved; meanwhile, the purposes of effectively treating the waste gas into condensed waste gas, decomposing the waste gas into carbon dioxide and water, achieving the standard discharge of the ring discharge and protecting the environment are achieved.

Through the heat preservation of first condenser, second condenser and third condenser, first heat preservation pipe, second heat preservation pipe, protection tube, heat preservation coating and the cotton layer that keeps warm, reduce the liquid nitrogen and follow external absorptive heat between first condenser, second condenser and third condenser outer wall in the transfer process, guarantee the heat exchange efficiency of nitrogen gas, the five composition of carbon in the efficient recovery waste gas, improve the resource utilization ratio of liquid nitrogen resource utilization ratio and five composition of carbon, reduction in production cost.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a cross-sectional view of a first insulating tube;

fig. 3 is a schematic structural view of the first condenser, mainly showing an insulation layer.

In the figure, 1, a reaction kettle; 10. a first liquid pump; 11. a second liquid pump; 12. a third liquid pump; 13. a liquid nitrogen pump; 14. a first heat-insulating tube; 140. a third insulating pipe; 141. a heat-insulating coating; 142. a heat insulation cotton layer; 143. protecting the tube; 15. a second insulating tube; 16. a heat-insulating layer; 2. a carbon five recovery body; 3. an exhaust gas catalytic oxidation device; 4. a carbon five-raw material storage tank; 5. a liquid nitrogen tank; 6. a first carbon five recovery unit; 61. a first reduced pressure distillation kettle; 62. a first condenser; 63. a first holding tank; 631. a first detection liquid outflow pipe; 632. a first ball valve; 633. a second ball valve; 634. a third ball valve; 7. a second carbon five recovery unit; 71. a second reduced pressure distillation kettle; 72. a second condenser; 73. a second holding tank; 731. a second detection liquid outflow pipe; 732. a fourth ball valve; 733. a fifth ball valve; 734. a sixth ball valve; 8. a third carbon five recovery unit; 81. a third reduced pressure distillation kettle; 82. a third condenser; 83. a third holding tank; 831. a third detection liquid outflow pipe; 832. a seventh ball valve; 833. an eighth ball valve; 9. a nitrogen recovery tank; 91. a temperature detector.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the system for treating carbon five in the synthesis of maleic anhydride disclosed by the present invention comprises a reaction kettle 1, wherein the reaction kettle 1 is communicated with a carbon five recovery body 2, and the carbon five recovery body 2 is communicated with a waste gas catalytic oxidation device 3; the five-carbon recovery body 2 is communicated with a five-carbon raw material storage tank 4; the five-carbon recovery body 2 is communicated with a liquid nitrogen tank 5 for heat exchange of the five-carbon waste gas; the five-carbon recovery body 2 comprises a first five-carbon recovery unit 6, a second five-carbon recovery unit 7 communicated with the first five-carbon recovery unit 6 and a third five-carbon recovery unit 8 connected with the second five-carbon recovery unit 7 in series, and a first liquid pump 10 is communicated between the first five-carbon recovery unit 6 and the reaction kettle 1; a second liquid pump 11 is communicated between the first carbon five recovery unit 6 and the second carbon five recovery unit 7; a third liquid pump 12 is communicated between the second carbon five recovery unit 7 and the third carbon five recovery unit 8. After the isomerization reaction materials in the reaction kettle 1 are analyzed to be qualified, the materials are cooled to about the normal discharge temperature of reduced pressure distillation, and the materials are moved into the carbon five recovery body 2 through the first liquid pump 10 to be subjected to reduced pressure distillation, so that the purpose of recovering carbon five is achieved.

Referring to fig. 1, the first carbon five recovery unit 6 includes a first reduced pressure distillation kettle 61 communicating with the reaction kettle 1; the first reduced pressure distillation kettle 61 is communicated with a first condenser 62 communicated with the liquid nitrogen tank 5; the air inlet of the first condenser 62 is communicated with the steam outlet of the first reduced pressure distillation kettle 61; a liquid outlet of the first condenser 62 is communicated with a first collecting tank 63 communicated with the carbon five-raw material storage tank 4; the first collection tank 63 is communicated with a first detection liquid outflow pipe 631; the air outlet of the first condenser 62 is communicated with the exhaust gas catalytic oxidation device 3; the cooling medium inlet of the first condenser 62 is communicated with the liquid nitrogen tank 5, and the cooling medium outlet of the first condenser 62 is communicated with the second carbon five recovery unit 7; a liquid nitrogen pump 13 is provided between the liquid nitrogen tank 5 and the first condenser 62.

Referring to fig. 1, the second carbon five recovery unit 7 includes a second reduced pressure distillation still 71 communicating with the first collection tank 63; the second reduced pressure distillation kettle 71 is communicated with a second condenser 72 communicated with the first condenser 62; the air inlet of the second condenser 72 is communicated with the steam outlet of the second reduced pressure distillation kettle 71; the cooling medium inlet of the second condenser 72 is communicated with the cooling medium outlet of the first condenser 62; a liquid outlet of the second condenser 72 is communicated with a second collecting tank 73 communicated with the carbon five-raw material storage tank 4; the second collecting tank 73 is communicated with a second detection liquid outflow pipe 731; the air outlet of the second condenser 72 is communicated with the waste gas catalytic oxidation device 3; the outlet of the cooling medium of the second condenser 72 is communicated with the third carbon five recovery unit 8.

Referring to fig. 1, third carbon five recovery unit 8 includes a third reduced pressure still 81 communicating with second collection tank 73; the third reduced pressure distillation still 81 is communicated with a third condenser 82 communicated with the second condenser 72; the air inlet of the third condenser 82 is communicated with the vapor outlet of the third reduced pressure distillation kettle 81; the cooling medium inlet of the third condenser 82 is communicated with the cooling medium outlet of the second condenser 72; a liquid outlet of the third condenser 82 is communicated with a third collecting tank 83 communicated with the carbon five-raw material storage tank 4; the third collecting tank 83 is communicated with a third detection liquid outflow pipe 831; the outlet of the third condenser 82 is communicated with the exhaust gas catalytic oxidation device 3.

Referring to fig. 1, the outlet of the cooling medium of the third condenser 82 is communicated with a nitrogen recovery tank 9; the outer wall of the nitrogen recovery tank 9 is fixedly connected with a temperature detector 91, preferably a DT-1370 temperature detector, which extends into the nitrogen recovery tank 9; the purpose of recycling the nitrogen and improving the utilization rate of the nitrogen is realized. The temperature of the nitrogen in the nitrogen recovery tank 9 can be grasped by the temperature detector 91, and if the temperature of the nitrogen is lower than the outdoor temperature, the nitrogen can be used for preparing cooling water for cooling materials, so that the utilization rate of liquid nitrogen resources is reached. In order to reduce the heat absorption from the environment during the transfer of the liquid nitrogen from the liquid nitrogen tank 5 to the first condenser 62, a third insulating pipe 140 is connected between the liquid nitrogen tank 5 and the first condenser 62. In order to reduce the heat absorption from the environment during the transfer of the liquid nitrogen from the first condenser 62 to the second condenser 72, a first insulating pipe 14 is communicated between the cooling medium outlet of the first condenser 62 and the cooling medium inlet of the second condenser 72. In order to reduce the heat absorption from the environment during the liquid nitrogen transfer from the second condenser 72 to the third condenser 82, a second heat preservation pipe 15 is communicated between the cooling medium outlet of the second condenser 72 and the cooling medium inlet of the third condenser 82. Referring to fig. 2, the third insulating pipe 140, the first insulating pipe 14 and the second insulating pipe 15 have the same structure, taking the first insulating pipe 14 as an example, the outer wall of the first insulating pipe 14 is coated with an insulating coating 141, preferably a polyurethane coating with an extremely low thermal conductivity coefficient, and the first insulating pipe 14 is circumferentially coated with an insulating cotton layer 142, preferably a foam glass pipe shell made of a foam glass insulating material; the insulating cotton layer 142 is covered with a protective tube 143, preferably a double-layer polyurethane shell. Referring to fig. 3, in order to reduce the heat absorption of the first condenser 62, the second condenser 72 and the third condenser 82 from the outside, the outer walls of the first condenser 62, the second condenser 72 and the third condenser 82 are coated with an insulating layer 16, preferably a polyurethane coating having a very low thermal conductivity. The first vacuum distillation still 61, the second vacuum distillation still 71 and the third vacuum distillation still 81 have the same structure, and taking the first vacuum distillation still 61 as an example, the first vacuum distillation still 61 is provided with a vacuum pump for vacuum distillation and a vacuum buffer tank (not shown in the prior art figures).

The utility model discloses an operation demonstration: after the isomerization reaction material in the reaction kettle 1 is analyzed to be qualified, cooling the material to the normal discharge temperature of reduced pressure distillation; then, the materials are transferred into a first reduced pressure distillation kettle 61 for reduced pressure distillation through a first liquid pump 10; the fraction generated by the first reduced pressure distillation kettle 61 flows to a first condenser 62, and the liquid nitrogen exchanges heat with the carbon five fraction, so that most of the carbon five component is condensed and liquefied in the first condenser 62 and flows to a first collecting tank 63 from a liquid outlet of the first condenser 62; opening a first ball valve 632 of a first detection liquid outflow pipe 631, collecting five carbon components in the first collection tank 63, analyzing the purity of the collected five carbon components through an instrument, and if the collected five carbon components are detected to be qualified, opening a second ball valve 633 to enable the five carbon components in the first collection tank 63 to flow to a five carbon raw material storage tank 4 for storage and standby; if the detection is not qualified, the third ball valve 634 and the second liquid pump 11 are started, and the carbon five component in the first collecting tank 63 is pumped into the second reduced pressure distillation kettle 71 for reduced pressure distillation again; the fraction produced by the second vacuum distillation kettle 71 flows to a second condenser 72, and the liquid nitrogen exchanges heat with the carbon five fraction, so that most of the carbon five component is condensed and liquefied in the second condenser 72 and flows to a second collecting tank 73 from a liquid outlet of the second condenser 72; opening a fourth ball valve 732 of the second detection liquid outflow pipe 731, collecting the five carbon components in the second collection tank 73, analyzing the purity of the collected five carbon components through an instrument, and if the collected five carbon components are detected to be qualified, opening a fifth ball valve 733 to enable the five carbon components in the second collection tank 73 to flow to a five carbon raw material storage tank 4 for storage and standby; if the detection result is unqualified, starting a sixth ball valve 734 and a third liquid pump 12, pumping the carbon five component in the second collecting tank 73 into a third reduced pressure distillation kettle 81 for reduced pressure distillation again, and performing heat exchange on the carbon five fraction by using liquid nitrogen so that most of the carbon five component is condensed and liquefied in a third condenser 82 and flows to a third collecting tank 83 from a liquid outlet of the third condenser 82; opening a seventh ball valve 832 of a third detection liquid outflow pipe 831, collecting five carbon components in a third collecting tank 83, analyzing the purity of the collected five carbon components by an instrument, and ensuring that the purity of the five carbon components reaches the standard (the purity of the components obtained by three times of reduced pressure distillation according to production experience of many years is necessarily qualified, and the purity of the five carbon components is detected by the third detection liquid outflow pipe 831 arranged in order to avoid errors), and opening an eighth ball valve 833 after the purity of the five carbon components reaches the standard, so that the five carbon components in the third collecting tank 83 flow to a five carbon raw material storage tank 4 to be stored for later use; during which the uncondensed gas in the first condenser 62, the uncondensed gas in the second condenser 72 and the uncondensed gas in the third condenser 82 all flow toward the offgas catalytic oxidation unit 3; the uncondensed gas is heated to the catalytic combustion temperature (250 ℃) under the action of the waste gas catalytic oxidation device 3, then enters a catalytic reaction bed, and organic waste gas is subjected to oxidation reaction under the action of the activity of a catalyst to generate harmless water and carbon dioxide.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A five processing systems of carbon that is arranged in maleic anhydride synthesis which characterized in that: comprises a reaction kettle (1), wherein the reaction kettle (1) is communicated with a five-carbon recovery body (2), and the five-carbon recovery body (2) is communicated with a waste gas catalytic oxidation device (3); the five-carbon recovery body (2) is communicated with a five-carbon raw material storage tank (4); the five-carbon recovery body (2) is communicated with a liquid nitrogen tank (5) for storing a heat exchange medium; the five-carbon recovery body (2) comprises a first five-carbon recovery unit (6), a second five-carbon recovery unit (7) communicated with the first five-carbon recovery unit (6) and a third five-carbon recovery unit (8) connected with the second five-carbon recovery unit (7) in series, and a first liquid pump (10) is communicated between the first five-carbon recovery unit (6) and the reaction kettle (1); a second liquid pump (11) is communicated between the first carbon five recovery unit (6) and the second carbon five recovery unit (7); a third liquid pump (12) is communicated between the second carbon five recovery unit (7) and the third carbon five recovery unit (8).

2. The carbon five treatment system for use in maleic anhydride synthesis of claim 1, wherein: the first carbon five recovery unit (6) comprises a first reduced pressure distillation kettle (61) communicated with the reaction kettle (1); the first reduced pressure distillation kettle (61) is communicated with a first condenser (62) communicated with the liquid nitrogen tank (5); a liquid outlet of the first condenser (62) is communicated with a first collecting tank (63) communicated with the carbon five-raw material storage tank (4); the first collecting tank (63) is communicated with a first detection liquid outflow pipe (631); the air outlet of the first condenser (62) is communicated with the waste gas catalytic oxidation device (3); the cooling medium inlet of the first condenser (62) is communicated with the liquid nitrogen tank (5), and the cooling medium outlet of the first condenser (62) is communicated with the second carbon five recovery unit (7); a liquid nitrogen pump (13) is arranged between the liquid nitrogen tank (5) and the first condenser (62).

3. The carbon five treatment system for use in maleic anhydride synthesis of claim 2, wherein: the second carbon five recovery unit (7) comprises a second reduced pressure distillation still (71) communicating with the first collection tank (63); the second reduced pressure distillation kettle (71) is communicated with a second condenser (72) communicated with the first condenser (62); the cooling medium inlet of the second condenser (72) is communicated with the cooling medium outlet of the first condenser (62); a liquid outlet of the second condenser (72) is communicated with a second collecting tank (73) communicated with the carbon five-raw material storage tank (4); the second collecting tank (73) is communicated with a second detection liquid outflow pipe (731); the air outlet of the second condenser (72) is communicated with the waste gas catalytic oxidation device (3); the outlet of the cooling medium of the second condenser (72) is communicated with the third carbon five recovery unit (8).

4. The carbon five treatment system for use in maleic anhydride synthesis of claim 3, wherein: the third carbon five recovery unit (8) comprises a third reduced pressure still (81) communicating with a second collection tank (73); the third reduced pressure distillation kettle (81) is communicated with a third condenser (82) communicated with the second condenser (72); the cooling medium inlet of the third condenser (82) is communicated with the cooling medium outlet of the second condenser (72); a liquid outlet of the third condenser (82) is communicated with a third collecting tank (83) communicated with the carbon five-raw material storage tank (4); a third detection liquid outflow pipe (831) is communicated with the third collecting tank (83); the air outlet of the third condenser (82) is communicated with the waste gas catalytic oxidation device (3).

5. The carbon five treatment system for use in maleic anhydride synthesis of claim 4, wherein: the cooling medium outlet of the third condenser (82) is communicated with a nitrogen recovery tank (9); a temperature detector (91) is arranged in the nitrogen recovery tank (9).

6. The carbon five treatment system for use in maleic anhydride synthesis of claim 5, wherein: a first heat preservation pipe (14) is communicated between the cooling medium outlet of the first condenser (62) and the cooling medium inlet of the second condenser (72); a second heat preservation pipe (15) with the same structure as the first heat preservation pipe (14) is communicated between the cooling medium outlet of the second condenser (72) and the cooling medium inlet of the third condenser (82).

7. The carbon five treatment system for use in maleic anhydride synthesis of claim 6, wherein: the outer wall of the first heat-preservation pipe (14) is coated with a heat-preservation coating (141); the first heat-preservation pipe (14) is circumferentially coated on the heat-preservation cotton layer (142); the heat preservation cotton layer (142) is coated with a protection pipe (143).

8. The carbon five treatment system for use in maleic anhydride synthesis of claim 5, wherein: the outer walls of the first condenser (62), the second condenser (72) and the third condenser (82) are coated with an insulating layer (16).