CN104689590A - Novel tower plate-structure rectifying tower for maleic anhydride refining - Google Patents

Novel tower plate-structure rectifying tower for maleic anhydride refining Download PDF

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Publication number
CN104689590A
CN104689590A CN201310654671.5A CN201310654671A CN104689590A CN 104689590 A CN104689590 A CN 104689590A CN 201310654671 A CN201310654671 A CN 201310654671A CN 104689590 A CN104689590 A CN 104689590A
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China
Prior art keywords
tower
plate
sieve
column
plates
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Pending
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CN201310654671.5A
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Chinese (zh)
Inventor
于玉琪
顾嘉乐
魏新跃
刘光磊
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TIANJIN BOHUA ZHONGHE CHEMICAL CO Ltd
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TIANJIN BOHUA ZHONGHE CHEMICAL CO Ltd
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Priority to CN201310654671.5A priority Critical patent/CN104689590A/en
Publication of CN104689590A publication Critical patent/CN104689590A/en
Pending legal-status Critical Current

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Abstract

The invention provides a novel tower plate-structure rectifying tower for maleic anhydride refining. The novel tower plate-structure rectifying tower for maleic anhydride refining comprises a tower body, a float valve tower plate unit and a sieve tower plate unit, the bottom of the tower body is provided with a tower bottom heater, the top of the tower body is provided with a tower top outlet, the tower top outlet is fixedly connected to a condenser by a pipe, the float valve tower plate unit and the sieve tower plate unit are arranged between two side inner walls of the tower body, the float valve tower plate unit comprises several float valve tower plates, the sieve tower plate unit comprises several sieve tower plates, the novel tower plate-structure rectifying tower is used in maleic anhydride rectification purification, the float valve tower plates and eight sieve tower plates are arranged in the tower body. Through reasonable design of the number and positions of the float valve tower plates and the sieve tower plates and current limiting effects of the float valve tower plates, gas flux is partly reduced and a steam use amount is reduced. The novel tower plate-structure rectifying tower effectively utilizes the advantage of a high vertical sieve plate production capacity and improves production efficiency.

Description

A kind of rectifying column of New Type of Tray structure of refining for cis-butenedioic anhydride
Technical field
The present invention relates to rectifying device technical field, particularly relate to a kind of rectifying column of New Type of Tray structure of refining for cis-butenedioic anhydride.
Background technology
Cis-butenedioic anhydride subtractive process mainly uses plate distillation column.Plate distillation column is the equipment of a class for gas-liquid two-phase classification contact mass transfer.Column plate, also known as tower tray, is the main medium of gas-liquid mass transfer and heat transfer.Liquid under gravity, flows through each layer column plate from top to bottom successively, discharges at the bottom of tower; Gas, under pressure differential promotes, from bottom to top successively through each layer column plate, is discharged to tower top.Every block column plate remains the liquid layer of certain depth, gas is distributed in liquid layer by column plate and goes, and carries out phase border contact mass transfer.The different structure of tower tray, and the different gas-liquid flows of distillation operation, directly affects rectification efficiency.Conventional column plate has valve plate and sieve tray two kinds.Wherein, valve plate has several valve openings, each valve opening is equipped with a valve block that can fluctuate, valve block itself is connected with several valve leg, by valve leg footing switch 90 ° after insertion valve opening, to limit the maximum height that valve block rises, and preventing valve block from being blown away by gas, the advantage of valve plate is that structure is simple, cost is low, but gas flux is low, production capacity is weak, meanwhile, in subtractive process, float valve is easily clung by accessory substances such as tar, cause and send sour ability to decline, the problem such as pressure reduction rising in tower.Sieve-plate tower is made up of the air rising hole that plate has and cover calotte thereon, calotte with cylindrical be the most frequently used, this kind of column plate gas flux is large, but energy consumption is too high, also needs the steam that consumption is a large amount of.Because original rectifying column all uses float valve tray, production capacity is lower, therefore needs to transform, choose reasonable tray structure, and according to tray efficiency design tower height, the target improve production capacity to reach, reducing energy consumption.
Summary of the invention
The object of the invention is to provide a kind of rectifying tower of New Type of Tray structure of refining for cis-butenedioic anhydride.
Technical scheme of the present invention is: a kind of rectifying column of New Type of Tray structure of refining for cis-butenedioic anhydride, comprise tower body, valve plate group and sieve plate column plate group, tower reactor heater is provided with bottom described tower body, described tower body top is provided with tower top outlet, tower top outlet is fixedly connected with by pipeline with condenser, described valve plate group and sieve plate column plate group are arranged between the inwall of tower body both sides, arrange with tower body inwall is vertical and is fixedly connected with, described valve plate group is arranged on above sieve plate column plate group, described valve plate group is made up of some blocks of valve tower column plates, described sieve plate column plate group is made up of some blocks of sieve plate column plates, described valve tower column plate or sieve plate column plate are all provided with overflow pipe.
Further, the rectifying column of described a kind of New Type of Tray structure of refining for cis-butenedioic anhydride is used in the rectification and purification process of cis-butenedioic anhydride, arranges block valve tower column plate and 8 blocks of sieve plate column plates in tower body.
Beneficial effect of the present invention is: the quantity of reasonable layout valve plate and sieve plate column plate and position, by valve plate current limliting, part reduces gas flux, has saved steam consumption, effectively make use of the high advantage of vertical sieve tray production capacity simultaneously, improve production efficiency, the rectifying column of New Type of Tray structure, can effective steam saving compared with vertical sieve plate column in cis-butenedioic anhydride subtractive process, thus increases productive profit, and send sour ability beyond valve tower, effective raising equipment polishing capability.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention
Fig. 2 is valve plate schematic top plan view
Fig. 3 is sieve plate column plate schematic top plan view
Fig. 4 is valve plate structural representation
Fig. 5 is sieve-plate tower plate structure schematic diagram
Wherein: 1, tower body 2, valve plate 3, sieve plate column plate
4, tower reactor heater 5, tower top outlet 6, condenser
7, overflow pipe 21, float valve 31, vertical sieve aperture
Detailed description of the invention
Below in conjunction with accompanying drawing, brief description is made to the specific embodiment of the present invention.
As Figure 1-5, a kind of rectifying column of New Type of Tray structure of refining for cis-butenedioic anhydride, comprise tower body 1, valve plate group and sieve plate column plate group, it is characterized in that: bottom described tower body 1, be provided with tower reactor heater 4, described tower body 1 top is provided with tower top outlet 5, tower top outlet 5 is fixedly connected with by pipeline with condenser 6, described valve plate group and sieve plate column plate group are arranged between the inwall of tower body 1 both sides, arrange with tower body 1 inwall is vertical and is fixedly connected with, described valve plate group is arranged on above sieve plate column plate group, described valve plate group is made up of some blocks of valve tower column plates 2, described sieve plate column plate group is made up of some blocks of sieve plate column plates 3, described valve tower column plate 2 or sieve plate column plate 3 are all provided with overflow pipe 7.The rectifying column of described a kind of New Type of Tray structure of refining for cis-butenedioic anhydride is used in the rectification and purification process of cis-butenedioic anhydride, arranges 2 blocks of valve tower column plates 2 and 18 blocks of sieve plate column plates 3 in tower body 1.
Working method: this rectifying column is used as cis-butenedioic anhydride subtractive process, according to refining requirement and pedal efficiency, uses 20 blocks of column plates altogether.Operationally, maleic acid liquid raw material is transferred in tower body 1, by the heating of tower reactor heater 4, in material liquid, constituent part evaporation rises to tower top outlet 5 and goes out, the condenser 6 of tower top is by product condensation, and a part is as Product recycling, and another part is back in tower body 1.When 20 blocks of column plates all use valve plate 2, gas flux is low, and production capacity is weak, and in subtractive process, float valve is easily clung by accessory substances such as tar, causes sending sour ability to decline.When 20 blocks of column plates all use sieve plate column plate 3, tower tray flux increases, but energy consumption is too high, needs to consume a large amount of steam.
Preferably, use 2 blocks of valve platies 2 and 18 blocks of sieve plate column plates 3, valve plate 2 for controlling gas flux, thus saves steam loss, and the use of sieve plate column plate 3 can reduce pressure reduction, improves production capacity.
Above one embodiment of the present of invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.

Claims (2)

1. the rectifying column of a New Type of Tray structure of refining for cis-butenedioic anhydride, it is characterized in that: comprise tower body, valve plate group and sieve plate column plate group, tower reactor heater is provided with bottom described tower body, described tower body top is provided with tower top outlet, tower top outlet is fixedly connected with by pipeline with condenser, described valve plate group and sieve plate column plate group are arranged between the inwall of tower body both sides, arrange with tower body inwall is vertical and is fixedly connected with, described valve plate group is arranged on above sieve plate column plate group, described valve plate group is made up of some blocks of valve tower column plates, described sieve plate column plate group is made up of some blocks of sieve plate column plates, described valve tower column plate or sieve plate column plate are all provided with overflow pipe.
2. the rectifying column of a kind of New Type of Tray structure of refining for cis-butenedioic anhydride according to claim 1, it is characterized in that: the rectifying column of described a kind of New Type of Tray structure of refining for cis-butenedioic anhydride is used in the rectification and purification process of cis-butenedioic anhydride, arranges 2 blocks of valve tower column plates and 18 blocks of sieve plate column plates in tower body.
CN201310654671.5A 2013-12-04 2013-12-04 Novel tower plate-structure rectifying tower for maleic anhydride refining Pending CN104689590A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310654671.5A CN104689590A (en) 2013-12-04 2013-12-04 Novel tower plate-structure rectifying tower for maleic anhydride refining

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310654671.5A CN104689590A (en) 2013-12-04 2013-12-04 Novel tower plate-structure rectifying tower for maleic anhydride refining

Publications (1)

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CN104689590A true CN104689590A (en) 2015-06-10

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109761940A (en) * 2019-03-18 2019-05-17 淄博齐翔腾达化工股份有限公司 Crude maleic anhydride continuous rectification apparatus and process
CN110922370A (en) * 2019-11-20 2020-03-27 惠州宇新新材料有限公司 Process method and device for batch rectification of crude maleic anhydride
CN111744225A (en) * 2020-07-24 2020-10-09 邓健 Plate-type packing rectifying tower
CN112533682A (en) * 2018-08-06 2021-03-19 科氏-格利奇有限合伙公司 Multi-pass contact trays including fixed and movable valves for mass transfer columns and methods involving the same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112533682A (en) * 2018-08-06 2021-03-19 科氏-格利奇有限合伙公司 Multi-pass contact trays including fixed and movable valves for mass transfer columns and methods involving the same
CN112533682B (en) * 2018-08-06 2022-11-11 科氏-格利奇有限合伙公司 Multi-pass contact trays including fixed and movable valves for mass transfer columns and methods involving the same
CN109761940A (en) * 2019-03-18 2019-05-17 淄博齐翔腾达化工股份有限公司 Crude maleic anhydride continuous rectification apparatus and process
CN109761940B (en) * 2019-03-18 2024-03-26 淄博齐翔腾达化工股份有限公司 Continuous rectifying device and process method for crude maleic anhydride
CN110922370A (en) * 2019-11-20 2020-03-27 惠州宇新新材料有限公司 Process method and device for batch rectification of crude maleic anhydride
CN111744225A (en) * 2020-07-24 2020-10-09 邓健 Plate-type packing rectifying tower

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Application publication date: 20150610