WO2015161684A1 - 一种溶剂交换机及提高cta溶剂交换效率的方法 - Google Patents

一种溶剂交换机及提高cta溶剂交换效率的方法 Download PDF

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Publication number
WO2015161684A1
WO2015161684A1 PCT/CN2015/070410 CN2015070410W WO2015161684A1 WO 2015161684 A1 WO2015161684 A1 WO 2015161684A1 CN 2015070410 W CN2015070410 W CN 2015070410W WO 2015161684 A1 WO2015161684 A1 WO 2015161684A1
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Prior art keywords
filtrate
isolation block
chamber
washing
chambers
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PCT/CN2015/070410
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English (en)
French (fr)
Inventor
赵旭
张万尧
孙中心
谭永鹏
翟向楠
王天宝
梁元月
张国海
冯小朋
沈延顺
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天华化工机械及自动化研究设计院有限公司
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Priority to US15/305,034 priority Critical patent/US10273198B2/en
Priority to JP2017507053A priority patent/JP6434127B2/ja
Priority to EP15783070.4A priority patent/EP3135660A4/en
Priority to RU2016145456A priority patent/RU2650188C1/ru
Publication of WO2015161684A1 publication Critical patent/WO2015161684A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/42—Separation; Purification; Stabilisation; Use of additives
    • C07C51/48—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/08—Cellulose derivatives
    • C08L1/10—Esters of organic acids, i.e. acylates
    • C08L1/12—Cellulose acetate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • B01D33/11—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for outward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/35—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition
    • B01D33/37—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in parallel connection
    • B01D33/39—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in parallel connection concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/76—Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging the filter cake, e.g. chutes
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/42—Separation; Purification; Stabilisation; Use of additives
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C63/00—Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings
    • C07C63/14—Monocyclic dicarboxylic acids
    • C07C63/15—Monocyclic dicarboxylic acids all carboxyl groups bound to carbon atoms of the six-membered aromatic ring
    • C07C63/26—1,4 - Benzenedicarboxylic acid

Definitions

  • the invention relates to the technical field of CTA solvent exchange of an oxidation device in the production of PTA, in particular to a solvent exchange and a method for improving the solvent exchange efficiency of CTA.
  • PTA is the main raw material for the production of polyester fiber, resin, film and container resin. It is widely used in the fields of chemical fiber, container, packaging and film production. In recent years, the PTA process has developed rapidly, and the solvent exchange technology has developed rapidly. This technology can simplify the filtration, drying and pneumatic conveying of the PTA oxidation unit CTA into a “solvent exchange unit”; the CTA solvent exchange technology uses a countercurrent flow.
  • the clean washing liquid enters the solvent exchange from the last stage washing zone, after the solvent exchange is completed, it is discharged through the filtrate tube to the corresponding chamber of the control head, and then discharged into the corresponding filtrate tank, and the filtrate in the filtrate tank is again
  • the pump is introduced into the upper washing zone of the solvent exchange to continue the solvent exchange, so that the washing is carried out step by step, and the flow direction of the filter cake is opposite.
  • the method has been granted the Chinese patent (patent) by Tianhua Chemical Machinery and Automation Research and Design Institute Co., Ltd. No. 201010571736.6), but the method is an implementation method designed according to ideal conditions.
  • the drum multi-chamber pressure filtration, washing and separation unit work, the residual liquid of the filtrate pipeline of the multi-chamber pressure filtration, washing and separation unit can not be discharged in time, and will follow the rotation of the equipment.
  • a relatively clean washing zone results in an increase in the solvent concentration in the next stage of the washing liquid, thereby greatly reducing the solvent exchange efficiency.
  • a technical problem to be solved by the present invention is to provide a solvent exchanger capable of improving the solvent exchange efficiency of CTA.
  • the solvent switch of the present invention comprises a frame and a control head; the frame is divided into the partition block A, the partition block B, the partition block C, the partition block D, the partition block E, the partition block F, and the partition block G.
  • the control head is separated by a block, isolation block b, isolation Block c, isolation block d, isolation block e, isolation block f, isolation block g are divided into mother liquid chamber, primary filtrate chamber, secondary filtrate chamber, tertiary filtrate chamber, four filtrate chambers, five filtrate chambers Room, discharge area I; Off block A, isolation block B, isolation block C, isolation block D, isolation block E, isolation block F, isolation block G and the isolation block a, isolation block b, isolation block c, isolation block d, isolation block e, The isolation block f and the isolation block g are in one-to-one correspondence; the control head is provided with an adjustment plate; the fifth filtrate chamber is provided with the drainage port at the end; the primary washing unit chamber, the secondary washing unit chamber, and the third time The washing unit chamber, the four washing unit chambers, and the five washing unit chambers respectively pass through the filtr
  • Another technical problem to be solved by the present invention is to provide a method for improving the solvent exchange efficiency of CTA for the purpose of achieving low energy consumption.
  • a method for improving the solvent exchange efficiency of CTA according to the present invention comprises the following steps:
  • the CTA slurry in the CTA slurry tank is pressurized into the solvent exchange through the slurry pump, and enters the filtration unit through the feed zone in the solvent exchange frame to separate the mother liquor, the bias liquid mother liquor and the suspension.
  • A; the mother liquor and the bias liquid mother liquid enter the mother liquid tank through the mother liquid chamber in the solvent exchange control head, and are output through a mother liquid pump connected to the mother liquid tank; wherein the bias flow mother liquid comes from the residue of the filtrate pipeline
  • the mother liquor by adjusting the position of the partition block a between the mother liquid chamber and the primary filtrate chamber, so that the partition block a is advanced by ⁇ 1 angle corresponding to the frame spacer block A, so that the residual mother liquid is in the drum Entering the corresponding mother liquid chamber within a time of ⁇ 1 angle;
  • the washing water stored in one washing water tank is pressurized into a washing unit chamber in the frame by a washing water pump while the suspended matter A Delivered to the primary washing unit for washing, respectively obtaining a filtrate, a biased primary filtrate and a suspension B;
  • the primary filtrate and the biased primary filtrate are each passed through a primary filtrate chamber of the control head into a filtrate tank And passing through a primary filtrate pump output connected to the primary filtrate tank; wherein the washing water in the primary washing water tank is from the secondary filtrate discharged from the secondary washing unit chamber and the biased secondary filtrate;
  • the biased primary filtrate comes from Residual primary filtrate of the filtrate conduit, by adjusting the position of the partition b between the filtrate chamber and the secondary filtrate chamber, so that the spacer b is advanced by ⁇ 2 angle corresponding to the frame spacer B, so that the residue
  • the primary filtrate enters the corresponding primary filtrate chamber during the time when the drum rotates by ⁇ 2;
  • the washing water stored in the secondary washing water tank is pressurized into the secondary washing unit chamber in the frame by the secondary washing water pump, and simultaneously Rotating the drum B to the secondary washing unit for washing, respectively, to obtain a secondary filtrate, Biasizing the secondary filtrate and the suspension C;
  • the secondary filtrate and the biased secondary filtrate are both passed through the secondary filtrate chamber in the control head into the secondary filtrate tank, and are connected to the secondary filtrate tank a secondary filtrate pump is input to the solvent exchange; wherein the washing water in the secondary washing water tank is from three filtrates discharged from the three washing unit chambers and the third filtrate is biased;
  • the secondary filtrate of the bias flow is derived from the residue of the filtrate pipeline
  • the secondary filtrate is adjusted by adjusting the position of the partition block c between the secondary filtrate chamber and the tertiary filtrate chamber, so that the partition block c is advanced by ⁇ 3 angle from the corresponding frame spacer C, and the residual secondary filtrate is turned on the drum.
  • the washing water stored in the three washing water tanks is pressurized by three washing water pumps into the three washing unit chambers in the frame, and simultaneously Rotating the drum, the suspended solid C is sent to the three washing unit for washing, respectively obtaining three filtrates, a biased three filtrates and a suspension D; the tertiary filtrate and the biased three filtrates are passed through the control head three times.
  • the filtrate chamber enters a tertiary filtrate tank and is input to the solvent exchange through three filtrate pumps connected to the tertiary filtrate tank; wherein the wash water in the three wash water tanks is discharged four times from four wash unit chambers Filtrate and biased four times of filtrate; the three-stage filtrate from the filtrate three residual filtrate from the filtrate pipeline, by adjusting the position of the isolation block d between the three filtrate chambers and the four filtrate chambers, so that the isolation block d is more than the corresponding frame isolation block D is advanced by ⁇ 4 angle, so that the residual tertiary filtrate enters the corresponding three filtrate chambers during the time when the drum rotates by ⁇ 4 angle;
  • the washing water stored in the four washing water tanks is pressurized by four washing pumps into the four washing unit chambers in the frame while Rotating the drum D, the suspended matter D is sent to the four washing unit chambers for washing, respectively obtaining four filtrates, a biased flow of four filtrates and a suspension E; the four filtrates and the biased four filtrates are subjected to
  • the four filtrate chambers in the control head enter the four filtrate tanks and are input to the solvent exchange through four filtrate pumps connected to the four filtrate tanks; wherein the four washing water tanks are The washing water is from the five filtrates discharged from the five washing unit chambers and the five filtrates in the bias flow; the four times of the filtrate from the filtrate flows from the residual filtrate of the filtrate pipeline, and the four filtrate chambers are adjusted between the filtrate chamber and the five filtrate chambers.
  • the position of the isolation block e is such that the isolation block e advances by an angle of ⁇ 5 than the corresponding frame isolation block E, so that the residual four-stage filtrate enters the corresponding four-stage filtrate chamber within a time when the rotary drum rotates by ⁇ 5;
  • the washing water stored in the five washing water tanks is pressurized by five washing water pumps into the five washing unit chambers in the frame while The suspended solid E is sent to the five washing unit chambers for washing as the drum rotates, and five filtrates are respectively obtained. Five times the filtrate and the filter cake are biased; the five filtrates enter the five filtrate tanks through the five filtrate chambers in the control head, and are input to the five filtrate pumps connected to the five filtrate tanks.
  • the five times of the drifting filtrate is from the residual five filtrates of the filtrate pipeline, and the five filtrate chambers are drained from the drainage port to the biased filtrate tank by the suction unit, and passed through the biased filtrate tank a connected biased filtrate pump is input to the five-stage filtrate tank; an outlet of the suction unit is connected to the beating tank; and the washing water in the five washing water tanks is from fresh water heated to 90 ° C;
  • the filter cake After the end of the five washings, the filter cake enters the discharge zone II in the frame as the drum rotates, and the discharge gas enters from the discharge zone I in the control head, and the filter cake is subjected to Backflushing, the filter cake is discharged into the beating tank for beating to obtain a slurry and output.
  • the solvent switch in the step (1) comprises a frame and a control head; the frame is divided into an isolation block A, an isolation block B, an isolation block C, an isolation block D, an isolation block E, an isolation block F, and an isolation block G. Material zone, primary washing unit compartment, secondary washing unit compartment, three washing unit compartment, four washing unit compartments, five washing unit compartments, discharge zone II; the control head is separated by a block, isolation block b, isolation Block c, isolation block d, isolation block e, isolation block f, isolation block g are divided into mother liquid chamber, primary filtrate chamber, secondary filtrate chamber, tertiary filtrate chamber, four filtrate chambers, five filtrate chambers Room, discharge area I; the isolation block A, the isolation block B, the isolation block C, the isolation block D, the isolation block E, the isolation block F, the isolation block G and the isolation block a, the isolation block b, the isolation block c
  • the isolation block d, the isolation block e, the isolation block f, and the isolation block g are in
  • the suction unit in the step (6) refers to one of a centrifugal fan, a Roots blower, a vacuum pump or other pumping unit.
  • the present invention adds a suction unit, a biased filtrate tank, and a biased filtrate pump, and the residual filtrate in the filtrate tube is sucked into the biased filtrate tank by the pressure difference after the last washing, and continues to be used. Preventing this part of the filtrate from entering the discharge zone, and discharging the backflush gas from the discharge port with the discharge, contaminating the cleaned filter cake, not only improves the solvent exchange efficiency, but also reduces the total washing liquid requirement of the system.
  • the control head of the present invention is divided into a mother liquid chamber, a plurality of filtrate chambers, and a discharge area by a plurality of isolation blocks. Therefore, adjusting the position of the control head isolation block can discharge the residual filtrate in the filtrate tube during the solvent exchange process. In the corresponding chamber, it will not enter the lower concentration of the washing liquid in the lower stage, thereby improving the solvent exchange efficiency.
  • the control head of the invention has an adjustable structure, which can ensure that the different bias flow angles can be adjusted more flexibly and conveniently under different working conditions without replacing the equipment.
  • the present invention improves solvent exchange technology from both process flow and equipment structure, thereby significantly reducing process water consumption, improving solvent exchange efficiency, and greatly reducing energy consumption.
  • Figure 1 is a schematic diagram of a solvent exchange process of the present invention.
  • FIG. 2 is a simplified schematic view of a solvent switch in the present invention.
  • Figure 3 is a perspective view of the control head of the present invention.
  • a method for improving the solvent exchange efficiency of CTA includes the following steps:
  • the CTA slurry in the CTA slurry tank is pressurized into the solvent exchange 1 by the slurry pump, and enters the filtration unit through the feed zone 19 in the frame 18 of the solvent exchange 1 to separate the mother liquor, the bias liquid mother liquor, and Suspension A.
  • Both the mother liquid and the bias liquid mother liquid enter the mother liquid tank 2 through the mother liquid chamber 20 in the control head 23 of the solvent exchange 1, and are output through the mother liquid pump 9 connected to the mother liquid tank 2.
  • the countercurrent mother liquid is from the residual mother liquid of the filtrate pipeline.
  • the spacer block a22 is advanced by ⁇ 1 angle from the corresponding frame 18 isolation block A21, so that the residual mother liquid is obtained.
  • the corresponding mother liquid chamber 20 is entered during a time when the drum rotates by an angle of ⁇ 1.
  • the solvent exchange 1 includes a frame 18 and a control head 23 (see Figs. 2, 3).
  • the frame 18 is divided into a feeding zone 19, a primary washing unit chamber 24, and a secondary washing unit chamber 27 by an isolation block A21, an isolation block B25, an isolation block C30, an isolation block D35, an isolation block E40, an isolation block F44, and an isolation block G48.
  • the control head 23 is composed of an isolating block a22, an isolating block b28, an isolating block c31, an isolating block d36, and an isolating block e39.
  • the isolation block f43 and the isolation block g47 are divided into a mother liquid chamber 20, a primary filtrate chamber 26, a secondary filtrate chamber 29, a tertiary filtrate chamber 32, four filtrate chambers 38, five filtrate chambers 41, and discharge.
  • isolation block A21, isolation block B25, isolation block C30, isolation block D35, isolation block E40, isolation block F44, isolation block G48 and isolation block a22, isolation block b28, isolation block c31, isolation block d36, isolation block E39, the isolation block f43, the isolation block g47 are in one-to-one correspondence;
  • the control head 23 is provided with an adjustment plate 49;
  • the end of the fifth filtrate chamber 41 is provided with a drainage port 50;
  • the washing unit chamber 33, the four washing unit chambers 37, and the five washing unit chambers 42 are respectively filtered.
  • Tube 34 with a filtrate chamber 26, the secondary filtrate chamber 29, chamber 32 and the filtrate three times, four times and the filtrate chamber 38, one-fifth the filtrate chamber 41 is connected.
  • the washing water stored in one washing water tank is pressurized into the primary washing unit chamber 24 in the frame 18 by a washing water pump, and the suspended matter A is transported to the washing unit chamber once.
  • the washing was carried out in 24, and the filtrate, the drift primary filtrate, and the suspension B were respectively obtained.
  • the primary filtrate and the biased primary filtrate enter the primary filtrate tank 3 through the primary filtrate chamber 26 in the control head 23, and are output through a primary filtrate pump 10 connected to the primary filtrate tank 3.
  • the washing water in one washing water tank is from the secondary filtrate discharged from the secondary washing unit chamber 27 and the secondary filtrate in the bias flow; the primary filtrate from the filtrate pipeline is biased once, and the filtrate chamber 26 and the secondary filtrate chamber are adjusted once.
  • the position of the spacer block b28 between the chambers 29 causes the spacer block b28 to advance by an angle ⁇ 2 from the corresponding frame 18 spacer block B25, so that the remaining primary filtrate enters the corresponding primary filtrate chamber 26 during the time when the drum rotates by ⁇ 2.
  • the washing water stored in the secondary washing water tank is pressurized by the secondary washing water pump into the secondary washing unit chamber 27 in the frame 18, together with the drum Rotating the suspended solid B to the secondary washing unit chamber 27 for washing, respectively obtaining a secondary filtrate, a biased secondary filtrate and a suspended solid C; the secondary filtrate and the biased secondary filtrate are both passed through the control head 23
  • the secondary filtrate chamber 29 enters the secondary filtrate tank 4, and is input to the solvent exchange 1 through the secondary filtrate pump 11 connected to the secondary filtrate tank 4.
  • the washing water in the secondary washing water tank is from the three filtrates discharged from the three washing unit chambers 33 and the third-stage filtrate; the secondary filtrate from the filtrate pipeline is the residual filtrate, and the secondary filtrate chamber 29 and the third filtrate chamber are adjusted.
  • the position of the partition block c31 between the chambers 32 causes the partition block c31 to advance by an angle ⁇ 3 from the corresponding frame 18 partition block C30, so that the residual secondary filtrate enters the corresponding secondary filtrate chamber 29 during the time when the drum rotates by ⁇ 3.
  • the washing water stored in the three washing water tanks is pressurized by the three washing water pumps into the three washing unit chambers 33 in the frame 18, with the rotation of the drum
  • the suspension C is sent to the three washing unit chambers 33 for washing to obtain three filtrates, three times of the filtrate and the suspension D; the third filtrate and the third stream of the filtrate are fed into the three filtrate tanks through the three filtrate chambers 32 in the control head 23, respectively. 5, and is input to the solvent exchange 1 through the tertiary filtrate pump 12 connected to the tertiary filtrate tank 5.
  • the washing water in the three washing water tanks is from the four filtrates discharged from the four washing unit chambers 37 and the four filtrates in the biasing flow; the three filtrates from the filtrate pipeline are three times in the bias flow, and the filtrate chamber 32 and the four filtrate chambers are adjusted three times.
  • the position of the isolation block d36 between the chambers 38 makes the isolation block d36 correspond to
  • the frame 18 isolating block D35 leads the angle ⁇ 4 so that the remaining three filtrates enter the corresponding three filtrate chambers 32 during the time the drum rotates by ⁇ 4.
  • the washing water in the four washing water tanks is from the five filtrates discharged from the five washing unit chambers 42 and the five filtrates in the biasing flow; the four filtrates from the filtrate pipeline are four times in the bias flow, and the filtrate chamber 38 is adjusted four times by adjusting The position of the isolation block e39 between the five filtrate chambers 41 causes the isolation block e39 to advance by ⁇ 5 angle from the corresponding frame 18 isolation block E40, so that the residual four filtrates enter the corresponding four filtrates during the time when the drum rotates by ⁇ 5 angle. Chamber 38.
  • the suction unit 17 refers to one of a centrifugal fan, a Roots blower, a vacuum pump or other pumping unit.
  • the rotating cake After the end of the five washings, the rotating cake enters the discharge zone II 46 in the frame 18 as the rotating drum rotates, and the unloading gas enters from the discharge zone I 45 in the control head 23, and the filter cake is backflushed.
  • the filter cake is discharged into the beater tank 8 for beating to obtain a slurry and output.
  • the invention further comprises a suction unit, a bias flow filtrate tank and a bias flow filtrate pump, and the residual filtrate in the filtrate tube is sucked into the bias flow filtrate tank by the pressure difference after the last washing, and continues to be used, thereby preventing the part of the filtrate from entering the discharge area.
  • the solvent switch control head is divided into a mother liquid chamber, a plurality of filtrate chambers, a discharge area I by a plurality of isolation blocks, and the position of the control head isolation block is adjusted, so that the residual filtrate in the filtrate tube in the solvent exchange process is discharged into the corresponding chamber. It will not enter the next lower concentration washing liquid, thus improving the solvent exchange efficiency.
  • the invention improves the solvent exchange technology from the two aspects of the process flow and the equipment structure, thereby significantly reducing the process water consumption, improving the solvent exchange efficiency, and greatly reducing the energy consumption.

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Abstract

本发明涉及溶剂交换机及提高CTA溶剂交换效率的方法，该方法包括以下步骤：（1）CTA料浆增压进入溶剂交换机中分离，分别得到母液、偏流母液和悬浮物A；（2）悬浮物A洗涤后分别得到一次滤液、偏流一次滤液和悬浮物B；（3）悬浮物B洗涤后分别得到二次滤液、偏流二次滤液和悬浮物C；（4）悬浮物C洗涤后分别得到三次滤液、偏流三次滤液和悬浮物D；（5）悬浮物D洗涤后分别得到四次滤液、偏流四次滤液和悬浮物E；（6）悬浮物E洗涤后分别得到五次滤液、偏流五次滤液和滤饼；其中偏流五次滤液由抽吸机组将其引流至偏流滤液罐；（7）洗涤结束后，对滤饼进行反吹后打浆，得到浆料并输出。本发明通过工艺流程和设备结构两方面的改进，大大降低了能耗，提高了溶剂交换效率。

Description

一种溶剂交换机及提高CTA溶剂交换效率的方法 技术领域
本发明涉及PTA生产制备中氧化装置CTA溶剂交换的技术领域，尤其涉及一种溶剂交换机及提高CTA溶剂交换效率的方法。
背景技术
PTA是生产聚酯纤维、树脂、胶片及容器树脂的主要原料，被广泛应用于化纤、容器、包装、薄膜生产等领域。近年来PTA工艺迅速发展，随之产生溶剂交换技术迅速发展，通过该技术可将PTA氧化装置CTA的过滤、干燥、气力输送储存简化为“溶剂交换”单元完成；CTA溶剂交换技术采用的是逆流多级洗涤工艺，干净的洗涤液从最后一级洗涤区进入溶剂交换机，溶剂交换完成后通过滤液管排至控制头对应的腔室内，再排至对应的滤液罐内，滤液罐内的滤液又通过泵进入溶剂交换机上一级洗涤区继续进行溶剂交换，这样逐级依次向前洗涤，与滤饼流动方向相反，该方法天华化工机械及自动化研究设计院有限公司已获得中国专利授权(专利号201010571736.6)，但该方法是按理想条件设计的实施方法。在CTA溶剂交换机采用转鼓多室压力过滤、洗涤、分离机组工作过程中，由于转鼓多室压力过滤、洗涤、分离机组滤液管道的残液无法及时排出，会随着设备的转动进入下一级较为干净的洗涤区，导致下一级洗涤液中溶剂浓度提高，从而使溶剂交换效率大大降低。
发明公开
本发明所要解决的一技术问题是：提供一种能提高CTA溶剂交换效率的溶剂交换机。
为解决上述问题，本发明的溶剂交换机包括框架和控制头；所述框架由隔离块A、隔离块B、隔离块C、隔离块D、隔离块E、隔离块F、隔离块G分为进料区、一次洗涤单元室、二次洗涤单元室、三次洗涤单元室、四次洗涤单元室、五次洗涤单元室、卸料区II；所述控制头由隔离块a、隔离块b、隔离块c、隔离块d、隔离块e、隔离块f、隔离块g分为母液腔室、一次滤液腔室、二次滤液腔室、三次滤液腔室、四次滤液腔室、五次滤液腔室、卸料区I；所述隔 离块A、隔离块B、隔离块C、隔离块D、隔离块E、隔离块F、隔离块G与所述隔离块a、隔离块b、隔离块c、隔离块d、隔离块e、隔离块f、隔离块g一一对应；所述控制头上设有调节板；所述五次滤液腔室末端设有所述引流口；所述一次洗涤单元室、二次洗涤单元室、三次洗涤单元室、四次洗涤单元室、五次洗涤单元室分别通过滤液管与所述一次滤液腔室、二次滤液腔室、三次滤液腔室、四次滤液腔室、五次滤液腔室一一对应相连。
本发明所要解决的另一技术问题是提供一种达到低能耗目的的提高CTA溶剂交换效率的方法。
为解决上述问题，本发明所述的一种提高CTA溶剂交换效率的方法，包括以下步骤：
(1)CTA料浆罐内的CTA料浆通过料浆泵增压进入溶剂交换机中，经所述溶剂交换机框架中的进料区进入过滤单元室内进行分离，分别得到母液、偏流母液和悬浮物A；所述母液与所述偏流母液均经所述溶剂交换机控制头中的母液腔室进入母液罐，并通过与所述母液罐相连的母液泵输出；其中所述偏流母液来自滤液管道的残留母液，通过调整所述母液腔室与一次滤液腔室之间的隔离块a的位置，使所述隔离块a比对应所述框架隔离块A超前θ1角度，使所述的残留母液在转鼓转过θ1角度的时间内进入对应母液腔室；
(2)所述悬浮物A填满所述过滤单元室后，储存在一次洗涤水罐内的洗涤水通过一次洗涤水泵增压进入所述框架中的一次洗涤单元室，同时所述悬浮物A输送至所述一次洗涤单元室内进行洗涤，分别得到一次滤液、偏流一次滤液和悬浮物B；所述一次滤液与所述偏流一次滤液均经所述控制头中的一次滤液腔室进入一次滤液罐，并通过与所述一次滤液罐相连的一次滤液泵输出；其中所述一次洗涤水罐内的洗涤水来自二次洗涤单元室排出的二次滤液及偏流二次滤液；所述偏流一次滤液来自滤液管道的残留一次滤液，通过调整一次滤液腔室与二次滤液腔室之间的隔离块b的位置，使所述隔离块b比对应所述框架隔离块B超前θ2角度，使所述残留一次滤液在转鼓转过θ2角度的时间内进入对应一次滤液腔室；
(3)所述悬浮物B填满所述一次洗涤单元室后，储存在二次洗涤水罐内的洗涤水通过二次洗涤水泵增压进入所述框架中的二次洗涤单元室，同时随着转鼓的旋转该悬浮物B输送至所述二次洗涤单元室内进行洗涤，分别得到二次滤液、 偏流二次滤液和悬浮物C；所述二次滤液与所述偏流二次滤液均经所述控制头中的二次滤液腔室进入二次滤液罐，并通过与所述二次滤液罐相连的二次滤液泵输入至所述溶剂交换机中；其中所述二次洗涤水罐内的洗涤水来自三次洗涤单元室排出的三次滤液及偏流三次滤液；所述偏流二次滤液来自滤液管道的残留二次滤液，通过调整二次滤液腔室与三次滤液腔室之间的隔离块c的位置，使隔离块c比对应框架隔离块C超前θ3角度，使所述残留二次滤液在转鼓转过θ3角度的时间内进入对应二次滤液腔室；
(4)所述悬浮物C填满所述二次洗涤单元室后，储存在三次洗涤水罐内的洗涤水通过三次洗涤水泵增压进入所述框架中的三次洗涤单元室，同时随着转鼓的旋转该悬浮物C输送至所述三次洗涤单元室内进行洗涤，分别得到三次滤液、偏流三次滤液和悬浮物D；所述三次滤液与所述偏流三次滤液均经所述控制头中的三次滤液腔室进入三次滤液罐，并通过与所述三次滤液罐相连的三次滤液泵输入至所述溶剂交换机中；其中所述三次洗涤水罐内的洗涤水来自四次洗涤单元室排出的四次滤液及偏流四次滤液；所述偏流三次滤液来自滤液管道的残留三次滤液，通过调整三次滤液腔室与四次滤液腔室之间的隔离块d的位置，使隔离块d比对应框架隔离块D超前θ4角度，使所述残留三次滤液在转鼓转过θ4角度的时间内进入对应三次滤液腔室；
(5)所述悬浮物D填满所述三次洗涤单元室后，储存在四次洗涤水罐内的洗涤水通过四次洗涤水泵增压进入所述框架中的四次洗涤单元室，同时随着转鼓的旋转该悬浮物D输送至所述四次洗涤单元室内进行洗涤，分别得到四次滤液、偏流四次滤液和悬浮物E；所述四次滤液与所述偏流四次滤液均经所述控制头中的四次滤液腔室进入四次滤液罐，并通过与所述四次滤液罐相连的四次滤液泵输入至所述溶剂交换机中；其中所述四次洗涤水罐内的洗涤水来自五次洗涤单元室排出的五次滤液及偏流五次滤液；所述偏流四次滤液来自滤液管道的残留四次滤液，通过调整四次滤液腔室与五次滤液腔室之间的隔离块e的位置，使隔离块e比对应框架隔离块E超前θ5角度，使所述残留四次滤液在转鼓转过θ5角度的时间内进入对应四次滤液腔室；
(6)所述悬浮物E填满所述四次洗涤单元室后，储存在五次洗涤水罐内的洗涤水通过五次洗涤水泵增压进入所述框架中的五次洗涤单元室，同时随着转鼓的旋转该悬浮物E输送至所述五次洗涤单元室内进行洗涤，分别得到五次滤液、 偏流五次滤液和滤饼；所述五次滤液经所述控制头中的五次滤液腔室进入五次滤液罐，并通过与所述五次滤液罐相连的五次滤液泵输入至所述溶剂交换机中；所述偏流五次滤液来自滤液管道的残留五次滤液，经所述五次滤液腔室由抽吸机组将其从引流口引流至偏流滤液罐，并通过与所述偏流滤液罐相连的偏流滤液泵输入至所述五次滤液罐中；所述抽吸机组的出口与打浆罐相连；所述五次洗涤水罐内的洗涤水来自加热到90℃的新鲜水；
(7)五次洗涤结束后，随着转鼓的旋转所述滤饼进入所述框架中卸料区II，同时卸料气从所述控制头中的卸料区I进入，对滤饼进行反吹，将所述滤饼卸至所述打浆罐中进行打浆，得到浆料并输出。
所述步骤(1)中的溶剂交换机包括框架和控制头；所述框架由隔离块A、隔离块B、隔离块C、隔离块D、隔离块E、隔离块F、隔离块G分为进料区、一次洗涤单元室、二次洗涤单元室、三次洗涤单元室、四次洗涤单元室、五次洗涤单元室、卸料区II；所述控制头由隔离块a、隔离块b、隔离块c、隔离块d、隔离块e、隔离块f、隔离块g分为母液腔室、一次滤液腔室、二次滤液腔室、三次滤液腔室、四次滤液腔室、五次滤液腔室、卸料区I；所述隔离块A、隔离块B、隔离块C、隔离块D、隔离块E、隔离块F、隔离块G与所述隔离块a、隔离块b、隔离块c、隔离块d、隔离块e、隔离块f、隔离块g一一对应；所述控制头上设有调节板；所述五次滤液腔室末端设有所述引流口；所述一次洗涤单元室、二次洗涤单元室、三次洗涤单元室、四次洗涤单元室、五次洗涤单元室分别通过滤液管与所述一次滤液腔室、二次滤液腔室、三次滤液腔室、四次滤液腔室、五次滤液腔室一一对应相连。
所述步骤(6)中的抽吸机组是指离心风机、罗茨风机、真空泵或其它具有抽吸作用的机组中的一种。
本发明与现有技术相比具有以下优点：
1、本发明与现有技术相比，增设抽吸机组、偏流滤液罐、偏流滤液泵，将最后一次洗涤后滤液管中的残留滤液利用压差抽吸至偏流滤液罐中，继续使用，可以防止这部分滤液进入卸料区，随卸料反吹气从下料口排出，污染已经洗涤干净的滤饼，不但提高溶剂交换效率，而且可以减少系统总的洗涤液需要量。
2、本发明控制头由多个隔离块分为母液腔室、多个滤液腔室、卸料区I因此，调整控制头隔离块位置，可以使溶剂交换过程中滤液管中的残留滤液排至 对应腔室内，不会进入下一级浓度较低的洗涤液中，从而提高了溶剂交换效率。
3、本发明控制头为可调结构，可以确保在不同工况下，不更换设备即可实现调节不同偏流角度更灵活、更方便的目的。
4、本发明从工艺流程和设备结构两方面来改进溶剂交换技术，从而显著降低工艺水消耗，提高溶剂交换效率，大大降低能耗。
以下结合附图和具体实施例对本发明进行详细描述，但不作为对本发明的限定。
附图简要说明
图1为本发明溶剂交换流程示意图。
图2为本发明中溶剂交换机简化示意图。
图3为本发明中控制头外形图。
其中，附图标记
1-溶剂交换机
2-母液罐
3-一次滤液罐
4-二次滤液罐
5-三次滤液罐
6-四次滤液罐
7-五次滤液罐
8-打浆罐
9-母液泵
10-一次滤液泵
11-二次滤液泵
12-三次滤液泵
13-四次滤液泵
14-五次滤液泵
15-偏流滤液泵
16-偏流滤液罐
17-抽吸机组
18-框架
19-进料区
20-母液腔室
21-隔离块A
22-隔离块a
23-控制头
24-一次洗涤单元室
25-隔离块B
26-一次滤液腔室
27-二次洗涤单元室
28-隔离块b
29-二次滤液腔室
30-隔离块C
31-隔离块c
32-三次滤液腔室
33-三次洗涤单元室
34-滤液管
35-隔离块D
36-隔离块d
37-四次洗涤单元室
38-四次滤液腔室
39-隔离块e
40-隔离块E
41-五次滤液腔室
42-五次洗涤单元室
43-隔离块f
44-隔离块F
45-卸料区I
46-卸料区II
47-隔离块g
48-隔离块G
49-调节板
50-引流口。
实现本发明的最佳方式
下面结合附图和具体实施例对本发明技术方案进行详细的描述，以更进一步了解本发明的目的、方案及功效，但并非作为本发明所附权利要求保护范围的限制。
如图1所示，一种提高CTA溶剂交换效率的方法，包括以下步骤：
(1)CTA料浆罐内的CTA料浆通过料浆泵增压进入溶剂交换机1中，经溶剂交换机1框架18中的进料区19进入过滤单元室内进行分离，分别得到母液、偏流母液和悬浮物A。母液与偏流母液均经溶剂交换机1控制头23中的母液腔室20进入母液罐2，并通过与母液罐2相连的母液泵9输出。
其中偏流母液来自滤液管道的残留母液，通过调整母液腔室20与一次滤液腔室26之间的隔离块a22的位置，使隔离块a22比对应框架18隔离块A21超前θ1角度，使的残留母液在转鼓转过θ1角度的时间内进入对应母液腔室20。
溶剂交换机1包括框架18和控制头23(参见图2、图3)。框架18由隔离块A21、隔离块B25、隔离块C30、隔离块D35、隔离块E40、隔离块F44、隔离块G 48分为进料区19、一次洗涤单元室24、二次洗涤单元室27、三次洗涤单元室33、四次洗涤单元室37、五次洗涤单元室42、卸料区II 46；控制头23由隔离块a22、隔离块b28、隔离块c31、隔离块d36、隔离块e39、隔离块f43、隔离块g47分为母液腔室20、一次滤液腔室26、二次滤液腔室29、三次滤液腔室32、四次滤液腔室38、五次滤液腔室41、卸料区I 45；隔离块A21、隔离块B25、隔离块C30、隔离块D35、隔离块E40、隔离块F44、隔离块G48与隔离块a22、隔离块b28、隔离块c31、隔离块d36、隔离块e39、隔离块f43、隔离块g47一一对应；控制头23上设有调节板49；五次滤液腔室41末端设有引流口50；一次洗涤单元室24、二次洗涤单元室27、三次洗涤单元室33、四次洗涤单元室37、五次洗涤单元室42分别通过滤液管34与一次滤液腔室26、二次滤液腔室29、三次滤液腔室32、四次滤液腔室38、五次滤液腔室41一一对应相连。
(2)悬浮物A填满过滤单元室后，储存在一次洗涤水罐内的洗涤水通过一次洗涤水泵增压进入框架18中的一次洗涤单元室24，同时悬浮物A输送至一次洗涤单元室24内进行洗涤，分别得到一次滤液、偏流一次滤液和悬浮物B。一次滤液与偏流一次滤液均经控制头23中的一次滤液腔室26进入一次滤液罐3，并通过与一次滤液罐3相连的一次滤液泵10输出。
其中一次洗涤水罐内的洗涤水来自二次洗涤单元室27排出的二次滤液及偏流二次滤液；偏流一次滤液来自滤液管道的残留一次滤液，通过调整一次滤液腔室26与二次滤液腔室29之间的隔离块b28的位置，使隔离块b28比对应框架18隔离块B25超前θ2角度，使残留一次滤液在转鼓转过θ2角度的时间内进入对应一次滤液腔室26。
(3)悬浮物B填满一次洗涤单元室24后，储存在二次洗涤水罐内的洗涤水通过二次洗涤水泵增压进入框架18中的二次洗涤单元室27，同时随着转鼓的旋转该悬浮物B输送至二次洗涤单元室27内进行洗涤，分别得到二次滤液、偏流二次滤液和悬浮物C；二次滤液与偏流二次滤液均经所述控制头23中的二次滤液腔室29进入二次滤液罐4，并通过与二次滤液罐4相连的二次滤液泵11输入至溶剂交换机1中。
其中二次洗涤水罐内的洗涤水来自三次洗涤单元室33排出的三次滤液及偏流三次滤液；偏流二次滤液来自滤液管道的残留二次滤液，通过调整二次滤液腔室29与三次滤液腔室32之间的隔离块c31的位置，使隔离块c31比对应框架18隔离块C30超前θ3角度，使残留二次滤液在转鼓转过θ3角度的时间内进入对应二次滤液腔室29。
(4)悬浮物C填满二次洗涤单元室27后，储存在三次洗涤水罐内的洗涤水通过三次洗涤水泵增压进入框架18中的三次洗涤单元室33，同时随着转鼓的旋转该悬浮物C输送至三次洗涤单元室33内进行洗涤，分别得到三次滤液、偏流三次滤液和悬浮物D；三次滤液与偏流三次滤液均经控制头23中的三次滤液腔室32进入三次滤液罐5，并通过与三次滤液罐5相连的三次滤液泵12输入至溶剂交换机1中。
其中三次洗涤水罐内的洗涤水来自四次洗涤单元室37排出的四次滤液及偏流四次滤液；偏流三次滤液来自滤液管道的残留三次滤液，通过调整三次滤液腔室32与四次滤液腔室38之间的隔离块d36的位置，使隔离块d36比对应 框架18隔离块D35超前θ4角度，使残留三次滤液在转鼓转过θ4角度的时间内进入对应三次滤液腔室32。
(5)悬浮物D填满三次洗涤单元室33后，储存在四次洗涤水罐内的洗涤水通过四次洗涤水泵增压进入框架18中的四次洗涤单元室37，同时随着转鼓的旋转该悬浮物D输送至四次洗涤单元室37内进行洗涤，分别得到四次滤液、偏流四次滤液和悬浮物E；四次滤液与偏流四次滤液均经控制头23中的四次滤液腔室38进入四次滤液罐6，并通过与四次滤液罐6相连的四次滤液泵13输入至溶剂交换机1中。
其中四次洗涤水罐内的洗涤水来自五次洗涤单元室42排出的五次滤液及偏流五次滤液；偏流四次滤液来自滤液管道的残留四次滤液，通过调整四次滤液腔室38与五次滤液腔室41之间的隔离块e39的位置，使隔离块e39比对应框架18隔离块E40超前θ5角度，使残留四次滤液在转鼓转过θ5角度的时间内进入对应四次滤液腔室38。
(6)悬浮物E填满所述四次洗涤单元室37后，储存在五次洗涤水罐内的洗涤水通过五次洗涤水泵增压进入框架18中的五次洗涤单元室42，同时随着转鼓的旋转该悬浮物E输送至五次洗涤单元室42内进行洗涤，分别得到五次滤液、偏流五次滤液和滤饼；五次滤液经控制头23中的五次滤液腔室41进入五次滤液罐7，并通过与五次滤液罐7相连的五次滤液泵14输入至溶剂交换机1中；偏流五次滤液来自滤液管道的残留五次滤液，经所述五次滤液腔室41由抽吸机组17将其从引流口50引流至偏流滤液罐16，并通过与偏流滤液罐16相连的偏流滤液泵15输入至五次滤液罐7中；抽吸机组17的出口与打浆罐8相连，确保抽吸尾气不外泄；五次洗涤水罐内的洗涤水来自加热到90℃的新鲜水。
其中：抽吸机组17是指离心风机、罗茨风机、真空泵或其它具有抽吸作用的机组中的一种。
(7)五次洗涤结束后，随着转鼓的旋转滤饼进入框架18中卸料区II 46，同时卸料气从控制头23中的卸料区I 45进入，对滤饼进行反吹，将滤饼卸至打浆罐8中进行打浆，得到浆料并输出。
当然，本发明还可有其它多种实施例，在不背离本发明精神及其实质的情况下，熟悉本领域的技术人员当可根据本发明作出各种相应的改变和变形，但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。
工业应用性
本发明增设抽吸机组、偏流滤液罐、偏流滤液泵，将最后一次洗涤后滤液管中的残留滤液利用压差抽吸至偏流滤液罐中，继续使用，可以防止这部分滤液进入卸料区，随卸料反吹气从下料口排出，污染已经洗涤干净的滤饼，不但提高溶剂交换效率，而且可以减少系统总的洗涤液需要量。溶剂交换机控制头由多个隔离块分为母液腔室、多个滤液腔室、卸料区I，调整控制头隔离块位置，可以使溶剂交换过程中滤液管中的残留滤液排至对应腔室内，不会进入下一级浓度较低的洗涤液中，从而提高了溶剂交换效率。本发明从工艺流程和设备结构两方面来改进溶剂交换技术，从而显著降低工艺水消耗，提高溶剂交换效率，大大降低能耗。

Claims (4)

  1. 一种提高CTA溶剂交换效率的方法，包括以下步骤：
    (1)CTA料浆罐内的CTA料浆通过料浆泵增压进入溶剂交换机(1)中，经所述溶剂交换机(1)框架(18)中的进料区(19)进入过滤单元室内进行分离，分别得到母液、偏流母液和悬浮物A；所述母液与所述偏流母液均经所述溶剂交换机(1)控制头(23)中的母液腔室(20)进入母液罐(2)，并通过与所述母液罐(2)相连的母液泵(9)输出；其中所述偏流母液来自滤液管道的残留母液，通过调整所述母液腔室(20)与一次滤液腔室(26)之间的隔离块a(22)的位置，使所述隔离块a(22)比对应所述框架(18)隔离块A(21)超前θ1角度，使所述的残留母液在转鼓转过θ1角度的时间内进入对应母液腔室(20)；
    (2)所述悬浮物A填满所述过滤单元室后，储存在一次洗涤水罐内的洗涤水通过一次洗涤水泵增压进入所述框架(18)中的一次洗涤单元室(24)，同时所述悬浮物A输送至所述一次洗涤单元室(24)内进行洗涤，分别得到一次滤液、偏流一次滤液和悬浮物B；所述一次滤液与所述偏流一次滤液均经所述控制头(23)中的一次滤液腔室(26)进入一次滤液罐(3)，并通过与所述一次滤液罐(3)相连的一次滤液泵(10)输出；其中所述一次洗涤水罐内的洗涤水来自二次洗涤单元室(27)排出的二次滤液及偏流二次滤液；所述偏流一次滤液来自滤液管道的残留一次滤液，通过调整一次滤液腔室(26)与二次滤液腔室(29)之间的隔离块b(28)的位置，使所述隔离块b(28)比对应所述框架(18)隔离块B(25)超前θ2角度，使所述残留一次滤液在转鼓转过θ2角度的时间内进入对应一次滤液腔室(26)；
    (3)所述悬浮物B填满所述一次洗涤单元室(24)后，储存在二次洗涤水罐内的洗涤水通过二次洗涤水泵增压进入所述框架(18)中的二次洗涤单元室(27)，同时随着转鼓的旋转该悬浮物B输送至所述二次洗涤单元室(27)内进行洗涤，分别得到二次滤液、偏流二次滤液和悬浮物C；所述二次滤液与所述偏流二次滤液均经所述控制头(23)中的二次滤液腔室(29)进入二次滤液罐(4)，并通过与所述二次滤液罐(4)相连的二次滤液泵(11)输入至所述溶剂交换机(1)中；其中所述二次洗涤水罐内的洗涤水来自三次洗涤单元室(33)排出的三次滤液及偏流三次滤液；所述偏流二次滤液来自滤液管道的残 留二次滤液，通过调整二次滤液腔室(29)与三次滤液腔室(32)之间的隔离块c(31)的位置，使隔离块c(31)比对应框架(18)隔离块C(30)超前θ3角度，使所述残留二次滤液在转鼓转过θ3角度的时间内进入对应二次滤液腔室(29)；
    (4)所述悬浮物C填满所述二次洗涤单元室(27)后，储存在三次洗涤水罐内的洗涤水通过三次洗涤水泵增压进入所述框架(18)中的三次洗涤单元室(33)，同时随着转鼓的旋转该悬浮物C输送至所述三次洗涤单元室(33)内进行洗涤，分别得到三次滤液、偏流三次滤液和悬浮物D；所述三次滤液与所述偏流三次滤液均经所述控制头(23)中的三次滤液腔室(32)进入三次滤液罐(5)，并通过与所述三次滤液罐(5)相连的三次滤液泵(12)输入至所述溶剂交换机(1)中；其中所述三次洗涤水罐内的洗涤水来自四次洗涤单元室(37)排出的四次滤液及偏流四次滤液；所述偏流三次滤液来自滤液管道的残留三次滤液，通过调整三次滤液腔室(32)与四次滤液腔室(38)之间的隔离块d(36)的位置，使隔离块d(36)比对应框架(18)隔离块D(35)超前θ4角度，使所述残留三次滤液在转鼓转过θ4角度的时间内进入对应三次滤液腔室(32)；
    (5)所述悬浮物D填满所述三次洗涤单元室(33)后，储存在四次洗涤水罐内的洗涤水通过四次洗涤水泵增压进入所述框架(18)中的四次洗涤单元室(37)，同时随着转鼓的旋转该悬浮物D输送至所述四次洗涤单元室(37)内进行洗涤，分别得到四次滤液、偏流四次滤液和悬浮物E；所述四次滤液与所述偏流四次滤液均经所述控制头(23)中的四次滤液腔室(38)进入四次滤液罐(6)，并通过与所述四次滤液罐(6)相连的四次滤液泵(13)输入至所述溶剂交换机(1)中；其中所述四次洗涤水罐内的洗涤水来自五次洗涤单元室(42)排出的五次滤液及偏流五次滤液；所述偏流四次滤液来自滤液管道的残留四次滤液，通过调整四次滤液腔室(38)与五次滤液腔室(41)之间的隔离块e(39)的位置，使隔离块e(39)比对应框架(18)隔离块E(40)超前θ5角度，使所述残留四次滤液在转鼓转过θ5角度的时间内进入对应四次滤液腔室(38)；
    (6)所述悬浮物E填满所述四次洗涤单元室(37)后，储存在五次洗涤水罐内的洗涤水通过五次洗涤水泵增压进入所述框架(18)中的五次洗涤单元室 (42)，同时随着转鼓的旋转该悬浮物E输送至所述五次洗涤单元室(42)内进行洗涤，分别得到五次滤液、偏流五次滤液和滤饼；所述五次滤液经所述控制头(23)中的五次滤液腔室(41)进入五次滤液罐(7)，并通过与所述五次滤液罐(7)相连的五次滤液泵(14)输入至所述溶剂交换机(1)中；所述偏流五次滤液来自滤液管道的残留五次滤液，经所述五次滤液腔室(41)由抽吸机组(17)将其从引流口(50)引流至偏流滤液罐(16)，并通过与所述偏流滤液罐(16)相连的偏流滤液泵(15)输入至所述五次滤液罐(7)中；所述抽吸机组(17)的出口与打浆罐(8)相连；所述五次洗涤水罐内的洗涤水来自加热到90℃的新鲜水；
    (7)五次洗涤结束后，随着转鼓的旋转所述滤饼进入所述框架(18)中卸料区II(46)，同时卸料气从所述控制头(23)中的卸料区I(45)进入，对滤饼进行反吹，将所述滤饼卸至所述打浆罐(8)中进行打浆，得到浆料并输出。
  2. 如权利要求1所述的一种提高CTA溶剂交换效率的方法，其特征在于：所述步骤(1)中的溶剂交换机(1)包括框架(18)和控制头(23)；所述框架(18)由隔离块A(21)、隔离块B(25)、隔离块C(30)、隔离块D(35)、隔离块E(40)、隔离块F(44)、隔离块G(48)分为进料区(19)、一次洗涤单元室(24)、二次洗涤单元室(27)、三次洗涤单元室(33)、四次洗涤单元室(37)、五次洗涤单元室(42)、卸料区II(46)；所述控制头(23)由隔离块a(22)、隔离块b(28)、隔离块c(31)、隔离块d(36)、隔离块e(39)、隔离块f(43)、隔离块g(47)分为母液腔室(20)、一次滤液腔室(26)、二次滤液腔室(29)、三次滤液腔室(32)、四次滤液腔室(38)、五次滤液腔室(41)、卸料区I(45)；所述隔离块A(21)、隔离块B(25)、隔离块C(30)、隔离块D(35)、隔离块E(40)、隔离块F(44)、隔离块G(48)与所述隔离块a(22)、隔离块b(28)、隔离块c(31)、隔离块d(36)、隔离块e(39)、隔离块f(43)、隔离块g(47)一一对应；所述控制头(23)上设有调节板(49)；所述五次滤液腔室(41)末端设有所述引流口(50)；所述一次洗涤单元室(24)、二次洗涤单元室(27)、三次洗涤单元室(33)、四次洗涤单元室(37)、五次洗涤单元室(42)分别通过滤液管(34)与所述一次滤液腔室(26)、二次滤液腔室(29)、三次滤液腔室(32)、四次滤液腔室(38)、五次滤液腔室(41)一一对应相连。
  3. 如权利要求1所述的一种提高CTA溶剂交换效率的方法，其特征在于：所述步骤(6)中的抽吸机组(17)是指离心风机、罗茨风机、真空泵或其它具有抽吸作用的机组中的一种。
  4. 一种溶剂交换机，其特征在于：所述溶剂交换机(1)包括框架(18)和控制头(23)；所述框架(18)由隔离块A(21)、隔离块B(25)、隔离块C(30)、隔离块D(35)、隔离块E(40)、隔离块F(44)、隔离块G(48)分为进料区(19)、一次洗涤单元室(24)、二次洗涤单元室(27)、三次洗涤单元室(33)、四次洗涤单元室(37)、五次洗涤单元室(42)、卸料区II(46)；所述控制头(23)由隔离块a(22)、隔离块b(28)、隔离块c(31)、隔离块d(36)、隔离块e(39)、隔离块f(43)、隔离块g(47)分为母液腔室(20)、一次滤液腔室(26)、二次滤液腔室(29)、三次滤液腔室(32)、四次滤液腔室(38)、五次滤液腔室(41)、卸料区I(45)；所述隔离块A(21)、隔离块B(25)、隔离块C(30)、隔离块D(35)、隔离块E(40)、隔离块F(44)、隔离块G(48)与所述隔离块a(22)、隔离块b(28)、隔离块c(31)、隔离块d(36)、隔离块e(39)、隔离块f(43)、隔离块g(47)一一对应；所述控制头(23)上设有调节板(49)；所述五次滤液腔室(41)末端设有所述引流口(50)；所述一次洗涤单元室(24)、二次洗涤单元室(27)、三次洗涤单元室(33)、四次洗涤单元室(37)、五次洗涤单元室(42)分别通过滤液管(34)与所述一次滤液腔室(26)、二次滤液腔室(29)、三次滤液腔室(32)、四次滤液腔室(38)、五次滤液腔室(41)一一对应相连。
PCT/CN2015/070410 2014-04-24 2015-01-09 一种溶剂交换机及提高cta溶剂交换效率的方法 WO2015161684A1 (zh)

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US15/305,034 US10273198B2 (en) 2014-04-24 2015-01-09 Solvent exchanger and method for improving the exchange efficiency of CTA solvent
JP2017507053A JP6434127B2 (ja) 2014-04-24 2015-01-09 粗テレフタル酸溶媒の置換効率を高める溶媒置換装置及び粗テレフタル酸溶媒置換率を高める方法
EP15783070.4A EP3135660A4 (en) 2014-04-24 2015-01-09 Solvent exchanger and method for improving exchange efficiency of cta solvent
RU2016145456A RU2650188C1 (ru) 2014-04-24 2015-01-09 Обменник для растворителя и способ улучшения обменной эффективности растворителя стк

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