WO2017219586A1 - Degassing method in spinning bath for viscose fiber production - Google Patents

Degassing method in spinning bath for viscose fiber production Download PDF

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Publication number
WO2017219586A1
WO2017219586A1 PCT/CN2016/105262 CN2016105262W WO2017219586A1 WO 2017219586 A1 WO2017219586 A1 WO 2017219586A1 CN 2016105262 W CN2016105262 W CN 2016105262W WO 2017219586 A1 WO2017219586 A1 WO 2017219586A1
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hydrogen sulfide
vacuum pump
water
degassing
tank
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PCT/CN2016/105262
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French (fr)
Chinese (zh)
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马志宏
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南通神马线业有限公司
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F13/00—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like
    • D01F13/02—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like of cellulose, cellulose derivatives or proteins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/10—Centrifugal pumps for compressing or evacuating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear

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  • the invention relates to a degassing method for a spinning bath, in particular to a degassing method for a spinning bath for viscose fiber production.
  • a spinning bath In the production process of viscose fiber, a spinning bath is used, and a certain amount of hydrogen sulfide is produced in the production process. Most of the hydrogen sulfide is dissolved in the spinning bath, in order to reduce the hydrogen sulfide in the spinning bath, Viscose fiber manufacturers generally degas the spinning bath, and the hydrogen sulfide gas that is taken out is sent to the desulfurization system for centralized treatment.
  • the degassing equipment of the spinning bath uses the water ring vacuum pump as the main equipment, and the water ring vacuum pump uses the produced water as the water.
  • the hydrogen sulfide extracted from the spinning bath will be partially dissolved in the working water used by the water ring vacuum pump, and the working water discharged from the water ring vacuum pump enters the wastewater treatment system, but During the process of entering the wastewater treatment system, part of the hydrogen sulfide will be separated from the working water, causing environmental pollution.
  • the present invention provides a degassing method for a spinning bath for viscose fiber production, by which the hydrogen sulfide content in the working water discharged from the water ring vacuum can be reduced, and the precipitation of hydrogen sulfide from the working water can be reduced. Quantity, reduce environmental pollution.
  • degassing of a spinning bath for viscose fiber production The method includes the following steps:
  • Step 1 The acid pump feeds the spinning bath from the underground tank into the first degassing tank in a vacuum state.
  • the hydrogen sulfide in the spinning bath is taken out under the action of vacuum, and is taken out.
  • Part of the hydrogen sulfide is discharged through the exhaust port of the water ring vacuum pump and enters the hydrogen sulfide treatment process, and the remaining part of the hydrogen sulfide is dissolved in the working water of the water ring vacuum pump;
  • Step 2 The working water of the water ring vacuum pump enters the second degassing tank in a vacuum state.
  • the hydrogen sulfide dissolved in the working water is taken out, and the discharged hydrogen sulfide is discharged through the second vacuum pump.
  • the gas port is discharged and enters the above hydrogen sulfide treatment process.
  • the working water of the water ring vacuum pump is degassed in the second degassing tank, thereby reducing the content of hydrogen sulfide in the working water, thereby reducing the entry of working water.
  • the total amount of hydrogen sulfide gas precipitated in the process of the wastewater treatment system reduces environmental pollution.
  • the working water of the water ring vacuum pump enters the gas water separation tank before entering the second degassing tank, in the gas water separation tank, and the working water
  • the hydrogen sulfide is taken out and passed through the second vacuum pump to the hydrogen sulfide treatment step; the hydrogen sulfide content in the working water is further lowered by the step, and the total amount of the hydrogen sulfide gas precipitated in the working water is further lowered.
  • FIG. 1 is a schematic view showing the structure of an apparatus for degassing a spinning bath for viscose fiber production using the present invention.
  • Fig. 1 is a schematic view showing the structure of a specific apparatus for carrying out the invention.
  • a degassing method for a spinning bath for viscose fiber production comprises the following steps:
  • Step 1 The acid pump 2 feeds the spinning bath from the underground tank 1 into the first degassing tank 3 in a vacuum state.
  • the hydrogen sulfide in the spinning bath is vacuumed.
  • a part of the hydrogen sulfide which is taken out is discharged through the exhaust port of the water ring vacuum pump 5 and enters the hydrogen sulfide treatment process, and the remaining part of the hydrogen sulfide is dissolved in the working water of the water ring vacuum pump;
  • Step 2 The working water of the water ring vacuum pump 5 enters into the second degassing tank 7 in a vacuum state.
  • the hydrogen sulfide dissolved in the working water is taken out, and the hydrogen sulfide which is taken out is passed through the second
  • the exhaust port of the vacuum pump 8 is discharged and enters the above-described hydrogen sulfide treatment process.
  • the degassed spinning bath is passed from the first degassing tank 3 to the acid recovery tank 4 for recycling.
  • the working water of the water ring vacuum pump 5 is degassed in the second degassing tank 8, thereby reducing the content of hydrogen sulfide in the working water, thereby reducing the work.
  • the total amount of hydrogen sulfide gas that is precipitated by water in the process of entering the wastewater treatment system reduces environmental pollution.
  • the working water of the water ring vacuum pump 5 enters the gas water separation tank 6 before entering the second degassing tank 7, in the gas water separation tank 6.
  • jobs The hydrogen sulfide in the water is taken out and passed through the second vacuum pump 8 to the hydrogen sulfide treatment step; the hydrogen sulfide content in the working water is further lowered by the step, and the total amount of the hydrogen sulfide gas precipitated in the working water is further lowered.
  • the working water of the water ring vacuum pump discharged from the second degassing tank is sent to the heat exchanger 9 to cool down, and after the temperature is lowered, the hydrogen sulfide is The solubility in the working water is increased, and the amount of hydrogen sulfide precipitated is effectively reduced.
  • the form of the degassing tank determines the efficiency of the degassing. Since the amount of the working water used in the water ring vacuum pump varies with the production, the plate type degassing tank having a higher elastic modulus is preferably used in the present embodiment.
  • the second vacuum pump should avoid the use of a wet vacuum pump to prevent the hydrogen sulfide from entering the water again.
  • the second vacuum pump uses a rotary vane vacuum pump, and of course, the second vacuum pump can also use a dry vacuum pump such as a reciprocating vacuum pump.

Abstract

A degassing method in a spinning bath for viscose fiber production, comprising the following steps: step 1: an acid pump pumps a spinning bath from an underground groove into a first degassing tank in a vacuum state, hydrogen sulfide in the spinning bath is removed from the first degassing tank under the action of vacuum, a part of the removed hydrogen sulfide is discharged from an exhaust port of a water ring vacuum pump and enters a hydrogen sulfide treatment process, and the rest of the removed hydrogen sulfide is dissolved in operating water of the water ring vacuum pump; and step 2: the operating water of the water ring vacuum pump enters a second degassing tank in the vacuum state, the dissolved hydrogen sulfide in the operating water is removed from the second degassing tank, and the removed hydrogen sulfide is discharged from an exhaust port of a second vacuum pump and enters the hydrogen sulfide treatment process. By means of the degassing method, the operating water of a water ring vacuum pump can be introduced into a second degassing tank to be degassed, the total amount of hydrogen sulfide gas separated out in a process that the operating water enters a wastewater treatment system is reduced, and the environmental pollution is reduced.

Description

粘胶纤维生产用纺丝浴的脱气方法Degassing method for spinning bath for viscose fiber production 技术领域：Technical field:
本发明涉及一种纺丝浴的脱气方法，具体涉及一种粘胶纤维生产用纺丝浴的脱气方法。The invention relates to a degassing method for a spinning bath, in particular to a degassing method for a spinning bath for viscose fiber production.
背景技术：Background technique:
在粘胶纤维的生产过程中要用到纺丝浴，生产过程中会产生一定量的硫化氢，大部分的硫化氢会溶解在纺丝浴中，为了降低纺丝浴中的硫化氢，各粘胶纤维生产企业一般会对纺丝浴进行脱气处理，脱出的硫化氢气体送入脱硫系统集中处理，纺丝浴的脱气设备以水环真空泵为主要设备，水环真空泵以生产水作为工作用水，在脱气过程中，从纺丝浴中脱出的硫化氢会有部分溶解在水环真空泵所使用的工作用水中，从水环真空泵中所排出的工作用水进入到废水处理系统，但在进入到废水处理系统的过程中会有部分硫化氢从工作用水中析出，造成环境污染。In the production process of viscose fiber, a spinning bath is used, and a certain amount of hydrogen sulfide is produced in the production process. Most of the hydrogen sulfide is dissolved in the spinning bath, in order to reduce the hydrogen sulfide in the spinning bath, Viscose fiber manufacturers generally degas the spinning bath, and the hydrogen sulfide gas that is taken out is sent to the desulfurization system for centralized treatment. The degassing equipment of the spinning bath uses the water ring vacuum pump as the main equipment, and the water ring vacuum pump uses the produced water as the water. Working water, during the degassing process, the hydrogen sulfide extracted from the spinning bath will be partially dissolved in the working water used by the water ring vacuum pump, and the working water discharged from the water ring vacuum pump enters the wastewater treatment system, but During the process of entering the wastewater treatment system, part of the hydrogen sulfide will be separated from the working water, causing environmental pollution.
发明内容：Summary of the invention:
为解决上述问题，本发明提供一种粘胶纤维生产用纺丝浴的脱气方法，利用该方法能够降低水环真空排出的工作用水中的硫化氢含量，减少硫化氢从工作用水中的析出量，减少环境污染。In order to solve the above problems, the present invention provides a degassing method for a spinning bath for viscose fiber production, by which the hydrogen sulfide content in the working water discharged from the water ring vacuum can be reduced, and the precipitation of hydrogen sulfide from the working water can be reduced. Quantity, reduce environmental pollution.
本发明的目的是通过下述技术方案来实现的：粘胶纤维生产用纺丝浴的脱气 方法，包括如下步骤：The object of the present invention is achieved by the following technical solution: degassing of a spinning bath for viscose fiber production The method includes the following steps:
步骤1：酸泵将纺丝浴由地下槽送入呈真空状态的第一脱气罐内，在第一脱气罐内，纺丝浴中的硫化氢在真空的作用下被脱出，脱出的硫化氢一部分经水环真空泵的排气口排出并进入硫化氢处理工序，其余部分的硫化氢溶解在水环真空泵的工作用水中；Step 1: The acid pump feeds the spinning bath from the underground tank into the first degassing tank in a vacuum state. In the first degassing tank, the hydrogen sulfide in the spinning bath is taken out under the action of vacuum, and is taken out. Part of the hydrogen sulfide is discharged through the exhaust port of the water ring vacuum pump and enters the hydrogen sulfide treatment process, and the remaining part of the hydrogen sulfide is dissolved in the working water of the water ring vacuum pump;
步骤2：水环真空泵的工作用水进入到呈真空状态的第二脱气罐内，在第二脱气罐内，工作用水中溶解的硫化氢被脱出，脱出的硫化氢经第二真空泵的排气口排出并进入上述硫化氢处理工序。Step 2: The working water of the water ring vacuum pump enters the second degassing tank in a vacuum state. In the second degassing tank, the hydrogen sulfide dissolved in the working water is taken out, and the discharged hydrogen sulfide is discharged through the second vacuum pump. The gas port is discharged and enters the above hydrogen sulfide treatment process.
采用本发明粘胶纤维生产用纺丝浴的脱气方法，将水环真空泵的工作用水在第二脱气罐内进行脱气，减少工作用水中的硫化氢的含量，从而降低工作用水在进入到废水处理系统的过程中析出的硫化氢气体的总量，降低环境污染。By using the degassing method of the spinning bath for viscose fiber production of the invention, the working water of the water ring vacuum pump is degassed in the second degassing tank, thereby reducing the content of hydrogen sulfide in the working water, thereby reducing the entry of working water. The total amount of hydrogen sulfide gas precipitated in the process of the wastewater treatment system reduces environmental pollution.
在上述步骤1和步骤2之间还包括以下步骤：水环真空泵的工作用水在进入到第二脱气罐内前，先进入到气水分离罐内，在气水分离罐内，工作用水中的硫化氢被脱出并经第二真空泵进入到上述硫化氢处理工序；经过该步骤工作用水中的硫化氢的含量进一步降低，使工作用水中析出的硫化氢气体的总量进一步地降低。Between the above steps 1 and 2, the following steps are further included: the working water of the water ring vacuum pump enters the gas water separation tank before entering the second degassing tank, in the gas water separation tank, and the working water The hydrogen sulfide is taken out and passed through the second vacuum pump to the hydrogen sulfide treatment step; the hydrogen sulfide content in the working water is further lowered by the step, and the total amount of the hydrogen sulfide gas precipitated in the working water is further lowered.
温度越低，硫化氢在水中的溶解度越大，降低工作用水的温度，可有效地减少硫化氢的析出量，为此，将第二脱气罐排出的水环真空泵的工作用水经换热器降温后再进入到污水处理系统。The lower the temperature, the greater the solubility of hydrogen sulfide in water, and the lower the temperature of working water, which can effectively reduce the amount of hydrogen sulfide. For this reason, the working water of the water ring vacuum pump discharged from the second degassing tank passes through the heat exchanger. After cooling down, enter the sewage treatment system.
附图说明：BRIEF DESCRIPTION OF THE DRAWINGS:
图1是使用本发明对粘胶纤维生产用纺丝浴进行脱气的装置的结构示意图。 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the structure of an apparatus for degassing a spinning bath for viscose fiber production using the present invention.
图中标记：Marked in the figure:
1.地下槽，2.酸泵，3.第一脱气罐，4.回酸桶，5.水环真空泵，1. Underground tank, 2. Acid pump, 3. First degassing tank, 4. Acid recovery tank, 5. Water ring vacuum pump,
6.气水分离罐，7.第二脱气罐，8.第二真空泵，9.换热器，10.二次进液管，6. Gas-water separation tank, 7. Second degassing tank, 8. Second vacuum pump, 9. Heat exchanger, 10. Secondary inlet pipe,
11.第一阀门，12.第二阀门。11. First valve, 12. Second valve.
具体实施方式：detailed description:
下面结合附图对本发明进一步说明。The invention will now be further described with reference to the accompanying drawings.
实施例1：Example 1:
图1是实施本发明的具体装置的结构示意图，参照图1，粘胶纤维生产用纺丝浴的脱气方法，包括如下步骤：BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the structure of a specific apparatus for carrying out the invention. Referring to Fig. 1, a degassing method for a spinning bath for viscose fiber production comprises the following steps:
步骤1：酸泵2将纺丝浴由地下槽1送入呈真空状态的第一脱气罐3内，在第一脱气罐3内，纺丝浴中的硫化氢在真空的作用下被脱出，脱出的硫化氢一部分经水环真空泵5的排气口排出并进入硫化氢处理工序，其余部分的硫化氢溶解在水环真空泵的工作用水中；Step 1: The acid pump 2 feeds the spinning bath from the underground tank 1 into the first degassing tank 3 in a vacuum state. In the first degassing tank 3, the hydrogen sulfide in the spinning bath is vacuumed. After being taken out, a part of the hydrogen sulfide which is taken out is discharged through the exhaust port of the water ring vacuum pump 5 and enters the hydrogen sulfide treatment process, and the remaining part of the hydrogen sulfide is dissolved in the working water of the water ring vacuum pump;
步骤2：水环真空泵5的工作用水进入到呈真空状态的第二脱气罐7内，在第二脱气罐7内，工作用水中溶解的硫化氢被脱出，脱出的硫化氢经第二真空泵8的排气口排出并进入上述硫化氢处理工序。Step 2: The working water of the water ring vacuum pump 5 enters into the second degassing tank 7 in a vacuum state. In the second degassing tank 7, the hydrogen sulfide dissolved in the working water is taken out, and the hydrogen sulfide which is taken out is passed through the second The exhaust port of the vacuum pump 8 is discharged and enters the above-described hydrogen sulfide treatment process.
经过脱气的纺丝浴由第一脱气罐3进入到回酸桶4循环使用。The degassed spinning bath is passed from the first degassing tank 3 to the acid recovery tank 4 for recycling.
采用本发明粘胶纤维生产用纺丝浴的脱气方法，将水环真空泵5的工作用水在第二脱气罐8内进行脱气，减少了工作用水中的硫化氢的含量，从而降低工作用水在进入到废水处理系统的过程中析出的硫化氢气体的总量，降低环境污染。By using the degassing method of the spinning bath for viscose fiber production of the present invention, the working water of the water ring vacuum pump 5 is degassed in the second degassing tank 8, thereby reducing the content of hydrogen sulfide in the working water, thereby reducing the work. The total amount of hydrogen sulfide gas that is precipitated by water in the process of entering the wastewater treatment system reduces environmental pollution.
在上述步骤1和步骤2之间还包括以下步骤：水环真空泵5的工作用水在进入到第二脱气罐7内前，先进入到气水分离罐6内，在气水分离罐6内，工作 用水中的硫化氢被脱出并经第二真空泵8进入到上述硫化氢处理工序；经过该步骤工作用水中的硫化氢的含量进一步降低，使工作用水中析出的硫化氢气体的总量进一步地降低。Between the above steps 1 and 2, the following steps are further included: the working water of the water ring vacuum pump 5 enters the gas water separation tank 6 before entering the second degassing tank 7, in the gas water separation tank 6. ,jobs The hydrogen sulfide in the water is taken out and passed through the second vacuum pump 8 to the hydrogen sulfide treatment step; the hydrogen sulfide content in the working water is further lowered by the step, and the total amount of the hydrogen sulfide gas precipitated in the working water is further lowered. .
为进一步降低水环真空泵7的工作用水中的硫化氢逸出的总量，第二脱气罐排出的水环真空泵的工作用水被送入到换热器9降温，温度降低后，硫化氢在工作用水中的溶解度增大，有效地降低了硫化氢的析出量。In order to further reduce the total amount of hydrogen sulfide escaping in the working water of the water ring vacuum pump 7, the working water of the water ring vacuum pump discharged from the second degassing tank is sent to the heat exchanger 9 to cool down, and after the temperature is lowered, the hydrogen sulfide is The solubility in the working water is increased, and the amount of hydrogen sulfide precipitated is effectively reduced.
脱气罐的形式决定着脱气的效率，由于水环真空泵的工作用水的用量会随着生产的变化而变化，因此，在本实施例中优先采用操作弹性系数较高的板式脱气罐。第二真空泵应避免采用湿式真空泵，以避免硫化氢再次进入到水中，在本实施例中第二真空泵采用旋片式真空泵，当然第二真空泵也可以采用往复式真空泵等干式真空泵。 The form of the degassing tank determines the efficiency of the degassing. Since the amount of the working water used in the water ring vacuum pump varies with the production, the plate type degassing tank having a higher elastic modulus is preferably used in the present embodiment. The second vacuum pump should avoid the use of a wet vacuum pump to prevent the hydrogen sulfide from entering the water again. In the present embodiment, the second vacuum pump uses a rotary vane vacuum pump, and of course, the second vacuum pump can also use a dry vacuum pump such as a reciprocating vacuum pump.

Claims (5)

  1. 粘胶纤维生产用纺丝浴的脱气方法，包括如下步骤：The method for degassing a spinning bath for viscose fiber production comprises the following steps:
    步骤1：酸泵将纺丝浴由地下槽送入呈真空状态的第一脱气罐内，在第一脱气罐内，纺丝浴中的硫化氢在真空的作用下被脱出，脱出的硫化氢一部分经水环真空泵的排气口排出并进入硫化氢处理工序，其余部分的硫化氢溶解在水环真空泵的工作用水中；Step 1: The acid pump feeds the spinning bath from the underground tank into the first degassing tank in a vacuum state. In the first degassing tank, the hydrogen sulfide in the spinning bath is taken out under the action of vacuum, and is taken out. Part of the hydrogen sulfide is discharged through the exhaust port of the water ring vacuum pump and enters the hydrogen sulfide treatment process, and the remaining part of the hydrogen sulfide is dissolved in the working water of the water ring vacuum pump;
    步骤2：水环真空泵的工作用水进入到呈真空状态的第二脱气罐内，在第二脱气罐内，工作用水中溶解的硫化氢被脱出，脱出的硫化氢经第二真空泵的排气口排出并进入上述硫化氢处理工序。Step 2: The working water of the water ring vacuum pump enters the second degassing tank in a vacuum state. In the second degassing tank, the hydrogen sulfide dissolved in the working water is taken out, and the discharged hydrogen sulfide is discharged through the second vacuum pump. The gas port is discharged and enters the above hydrogen sulfide treatment process.
  2. 根据权利要求1所述的脱气方法，其特征在于：在所述步骤1和步骤2之间还包括以下步骤：水环真空泵的工作用水在进入到第二脱气罐内前，先进入到气水分离罐内，在气水分离罐内，工作用水中的硫化氢被脱出并经第二真空泵进入到上述硫化氢处理工序。The degassing method according to claim 1, further comprising the step of: between the step 1 and the step 2, the working water of the water ring vacuum pump enters before entering the second degassing tank. In the gas-water separation tank, in the gas-water separation tank, hydrogen sulfide in the working water is taken out and passed through the second vacuum pump to the hydrogen sulfide treatment step.
  3. 根据权利要求1所述的脱气方法，其特征在于：第二脱气罐排出的水环真空泵的工作用水经换热器降温后进入到污水处理系统。The degassing method according to claim 1, characterized in that the working water of the water ring vacuum pump discharged from the second degassing tank is cooled by the heat exchanger and then enters the sewage treatment system.
  4. 根据权利要求1所述的脱气方法，其特征在于：所述第二脱气罐为板式脱气罐。The degassing method according to claim 1, wherein the second degassing tank is a plate type degassing tank.
  5. 根据权利要求1所述的脱气方法，其特征在于：所述第二真空泵为旋片式真空泵或往复式真空泵。 The degassing method according to claim 1, wherein the second vacuum pump is a rotary vane vacuum pump or a reciprocating vacuum pump.
PCT/CN2016/105262 2016-06-25 2016-11-10 Degassing method in spinning bath for viscose fiber production WO2017219586A1 (en)

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