WO2020220589A1 - 一种石油工业尾气加压回收系统 - Google Patents

一种石油工业尾气加压回收系统 Download PDF

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WO2020220589A1
WO2020220589A1 PCT/CN2019/110045 CN2019110045W WO2020220589A1 WO 2020220589 A1 WO2020220589 A1 WO 2020220589A1 CN 2019110045 W CN2019110045 W CN 2019110045W WO 2020220589 A1 WO2020220589 A1 WO 2020220589A1
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tail gas
outlet
inlet
gas
valve
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PCT/CN2019/110045
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English (en)
French (fr)
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刘德泼
徐荷花
宗刘旭
曹小建
季啸天
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金通灵科技集团股份有限公司
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Publication of WO2020220589A1 publication Critical patent/WO2020220589A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J4/00—Feed or outlet devices; Feed or outlet control devices
    • B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J4/00—Feed or outlet devices; Feed or outlet control devices
    • B01J4/008—Feed or outlet control devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2204/00—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices
    • B01J2204/002—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices the feeding side being of particular interest
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2204/00—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices
    • B01J2204/005—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices the outlet side being of particular interest
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2204/00—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices
    • B01J2204/007—Aspects relating to the heat-exchange of the feed or outlet devices

Definitions

  • the invention relates to a tail gas recovery system, in particular to a petroleum industry tail gas pressurized recovery system, which belongs to the field of environmental protection.
  • tail gas there are a lot of tail gas in the production process of the petroleum industry.
  • the main recovery methods are: adsorption, absorption, condensation, and membrane separation.
  • the tail gas In the production process, a large part of the tail gas contains useful components, but the tail gas often contains corrosive, toxic, flammable, explosive and other dangerous gases, and the rest is waste nitrogen, oxygen, carbon monoxide, carbon dioxide, water vapor, etc. Gas composition. If the recycling method is used, there will be problems such as complicated process and high cost; if the entire tail gas is directly burned in a torch, it will also cause energy waste and environmental pollution.
  • the technical problem to be solved by the present invention is to provide a pressurized recovery system for tail gas in the petroleum industry, which can react useful components in the tail gas again, thereby meeting the requirements of environmental protection.
  • the technical solution adopted by the present invention is:
  • a pressure recovery system for tail gas in the petroleum industry which is characterized in that it comprises a reactor, an absorption tower, an inlet regulating valve, a dryer, a centrifugal compressor and an outlet regulating valve.
  • the reactor is provided with a reaction raw material feed inlet and the tail gas of the reactor
  • the outlet is connected to the tail gas inlet of the absorption tower through a pipeline
  • the gas outlet of the absorption tower is connected to one end of the inlet regulating valve through a pipeline
  • the other end of the inlet regulating valve is connected to the inlet of the dryer through a pipeline
  • the outlet of the dryer is compressed by centrifugal compression through a pipeline
  • the air inlet of the machine is connected, the air outlet of the centrifugal compressor is connected to one end of the outlet regulating valve through a pipe, and the other end of the outlet regulating valve is connected to the gas recovery port of the reactor through a pipe.
  • the anti-surge device includes an anti-surge regulating valve, a cooler, and a return cooling water butterfly valve.
  • the air outlet of the centrifugal compressor is connected to one end of the anti-surge regulating valve through a pipe, and the other end of the anti-surge regulating valve.
  • the gas inlet of the cooler is connected through a pipe, the gas outlet of the cooler is connected to the gas inlet of the centrifugal compressor through the pipe, and the cooling water inlet of the cooler is connected to one end of the return cooling water butterfly valve through the pipe, and the cooling water is from the return cooling water butterfly valve.
  • the other end of the cooling water flows in, and the cooling water flows out from the cooling water outlet of the cooler.
  • it also includes a tail gas replacement recovery system.
  • the exhaust gas replacement and recovery system includes a blower, a blower outlet valve, an exhaust exhaust valve, and an exhaust collector. Air enters the blower from the gas inlet of the blower, and the gas outlet of the blower is connected to one end of the blower outlet valve through a pipe, and the blower outlet The other end of the valve is connected to the inlet of the dryer, one end of the exhaust valve is connected to the outlet of the centrifugal compressor through a pipe, and the other end of the exhaust valve is connected to the exhaust collector through a pipe.
  • an emergency exhaust gas treatment device Also includes an emergency exhaust gas treatment device.
  • the emergency tail gas treatment device includes a tail gas inlet regulating butterfly valve and a flare burner, one end of the tail gas inlet regulating butterfly valve is connected to the gas outlet of the absorption tower through a pipe, and the other end of the tail gas inlet regulating butterfly valve is connected to the flare burner through a pipe.
  • a PLC automatic adjustment controller which is connected to all valves of the system to control the opening and closing of the valves.
  • the present invention has the following advantages and effects:
  • the present invention adopts a gas pressurization method, the tail gas is pressurized into the reaction chamber, and the useful components in the tail gas participate in the reaction again, thereby meeting the environmental protection requirements, and solving the problems of high recycling cost and complex recycling process;
  • the invention adopts a single-stage high-speed centrifugal compressor with low noise, high efficiency, and high degree of automatic control.
  • the function is to increase the pressure of the tail gas and enter the reactor as a raw material for reaction;
  • Figure 1 is a schematic diagram of a petroleum industry tail gas pressurized recovery system of the present invention.
  • a petroleum industry tail gas pressurized recovery system of the present invention includes a reactor 1, an absorption tower 2, an inlet regulating valve 3, a dryer 4, a centrifugal compressor 5, and an outlet regulating valve 6.
  • Reactor 1 A reaction raw material feed port is provided, the tail gas outlet of the reactor 1 is connected to the tail gas inlet of the absorption tower 2 through a pipe, the gas outlet of the absorption tower 2 is connected to one end of the inlet regulating valve 3 through the pipe, and the other end of the inlet regulating valve 3 passes through
  • the pipe is connected to the inlet of the dryer 4, the outlet of the dryer 4 is connected to the air inlet of the centrifugal compressor 5 through a pipe, the air outlet of the centrifugal compressor 5 is connected to one end of the outlet regulating valve 6 through a pipe, and the outlet regulating valve 6 The other end is connected to the gas recovery port of the reactor 1 through a pipe.
  • the oxidation reaction section is carried out under certain temperature and pressure conditions.
  • the reactants enter the absorption tower 2 for the absorption and separation section.
  • Exhaust gas the tail gas contains propylene gas components, and the rest are waste nitrogen, oxygen, carbon monoxide, carbon dioxide, water vapor and other gas components.
  • the exhaust gas enters the dryer 4 through the inlet regulating valve 3, which reduces the water vapor content in the exhaust gas, effectively ensuring that no liquid condensate appears when entering the centrifugal compressor 5, which protects the compressor.
  • the tail gas After the tail gas is pressurized, it returns to the reactor 1 through the outlet regulating valve 6 to react, avoiding the waste of propylene gas in the tail gas.
  • the inlet regulating valve 3 and the outlet regulating valve 6 can be used to adjust the operating conditions of the centrifugal compressor 5.
  • the two valves can be adjusted separately or used in conjunction with a joint regulator.
  • a petroleum industry tail gas pressurized recovery system also includes an anti-surge device, a tail gas replacement recovery system, an emergency tail gas treatment device and a PLC automatic adjustment controller.
  • the PLC automatic adjustment controller is connected with all valves of the system to control the opening and closing of the valves.
  • the anti-surge device includes an anti-surge regulating valve 7, a cooler 8 and a return cooling water butterfly valve 9.
  • the air outlet of the centrifugal compressor 5 is connected to one end of the anti-surge regulating valve 7 through a pipe, and the other of the anti-surge regulating valve 7 One end is connected to the gas inlet of the cooler 8 through a pipe, the gas outlet of the cooler 8 is connected to the gas inlet of the centrifugal compressor 5 through a pipe, and the cooling water inlet of the cooler 8 is connected to one end of the reflux cooling water butterfly valve 9 through a pipe. Water flows in from the other end of the reflux cooling water butterfly valve 9, and cooling water flows out from the cooling water outlet of the cooler 8.
  • the PLC automatic control system 16 opens the anti-surge regulating valve 7, and at the same time automatically opens the return cooling water inlet butterfly valve 9, the cooler 8 starts to work, and automatically adjusts the amount of cooling water according to the temperature after the return.
  • the exhaust gas replacement and recovery system includes a blower 10, a blower outlet valve 11, an exhaust valve 12 and an exhaust collector 13. Air enters the blower 10 from the gas inlet of the blower 10, and the gas outlet of the blower 10 is connected to one end of the blower outlet valve 11 through a pipe , The other end of the blower outlet valve 11 is connected to the inlet of the dryer 4, one end of the exhaust valve 12 is connected to the outlet of the centrifugal compressor 5 through a pipe, and the other end of the exhaust valve 12 is connected to the exhaust collector 13 through a pipe.
  • the system includes the blower 10, the blower outlet valve 11, the exhaust exhaust valve 12 and the exhaust gas collector 13, which are automatically adjusted and controlled by PLC.
  • the system 16 operates automatically, reducing the difficulty of the operator.
  • the emergency exhaust gas treatment device includes a tail gas inlet regulating butterfly valve 14 and a flare burner 15.
  • One end of the tail gas inlet regulating butterfly valve 14 is connected to the gas outlet of the absorption tower 1 through a pipe, and the other end of the tail gas inlet regulating butterfly valve 14 is connected to the flare burner 15 through a pipe .
  • Exhaust gas treatment includes tail gas inlet regulating butterfly valve 14 and flare combustion 15. When an accident occurs in the recovery device, the regulating valve is temporarily opened to temporarily treat the tail gas to avoid direct discharge of the tail gas.
  • the invention adopts the gas pressurization method to pressurize the tail gas into the reaction chamber, and the useful components in the tail gas participate in the reaction again, thereby meeting the requirements of environmental protection, solving the problems of high recovery cost and complex recovery process; the invention adopts single-stage high-speed centrifugation
  • the compressor has low noise, high efficiency, and high degree of automatic control. Its function is to increase the pressure of the tail gas and enter the reactor as a raw material for reaction; the invention adopts a displacement gas system and PLC automatically controls the opening and closing of each valve, which reduces the operating difficulty of the operator. Meet the requirements of reliability and stability.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Drying Of Gases (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Abstract

一种石油工业尾气加压回收系统，包含反应器（1）、吸收塔（2）、进口调节阀门（3）、干燥机（4）、离心压缩机（5）和出口调节阀门（6），反应器（1）设置有反应原料进料口，反应器（1）的尾气出口通过管道与吸收塔（2）的尾气进口连接，吸收塔（2）的气体出口通过管道与进口调节阀门（3）的一端连接，进口调节阀门（3）的另一端通过管道与干燥机（4）的进口连接，干燥机（4）的出口通过管道与离心压缩机（5）的进气口连接，离心压缩机（5）的出气口通过管道与出口调节阀门（6）的一端连接，出口调节阀门（6）的另一端通过管道与反应器（1）的气体回收口连接。采用气体加压方式，将尾气加压到反应室内，将尾气中有用成份再次参加反应，从而达到环保要求，解决了回收成本高，回收工艺复杂问题。

Description

一种石油工业尾气加压回收系统 技术领域
本发明涉及一种尾气回收系统，特别是一种石油工业尾气加压回收系统，属于环保领域。
背景技术
在石油工业生产过程中会有许多的尾气，目前主要回收方法：吸附法、吸收法、冷凝法、膜分离法。在生产过程中，有很大部分尾气中含有用成份，然而该尾气中时常含有腐蚀性、有毒、易燃、易爆等危险性气体，其余为废氮气、氧气、一氧化碳、二氧化碳、水蒸汽等气体成份。如果用回收方法回收，存在工艺比较复杂，成本较高等问题；如果把整个尾气直接去火炬燃烧，也会造成能源浪费和环境污染等问题。
发明内容
本发明所要解决的技术问题是提供一种石油工业尾气加压回收系统，将尾气中有用成份再次参加反应，从而达到环保要求。
为解决上述技术问题，本发明所采用的技术方案是：
一种石油工业尾气加压回收系统，其特征在于：包含反应器、吸收塔、进口调节阀门、干燥机、离心压缩机和出口调节阀门，反应器设置有反应原料进料口，反应器的尾气出口通过管道与吸收塔的尾气进口连接，吸收塔的气体出口通过管道与进口调节阀门的一端连接，进口调节阀门的另一端通过管道与干燥机的进口连接，干燥机的出口通过管道与离心压缩机的进气口连接，离心压缩机的出气口通过管道与出口调节阀门的一端连接，出口调节阀门的另一端通过管道与反应器的气体回收口连接。
进一步地，还包含防喘振装置。
进一步地，所述防喘振装置包含防喘振调节阀门、冷却器和回流冷却水蝶阀，离心压缩机的出气口通过管道与防喘振调节阀门的一端连接，防喘振调节阀门的另一端通过管道与冷却器的气体进口连接，冷却器的气体出口通过管道与离心压缩机的气体进口连接，冷却器的冷却水进口通过管道与回流冷却水蝶阀的一端连接，冷却水从回流冷却水蝶阀的另一端流入，冷却水从冷却器的冷却水出口流出。
进一步地，还包含尾气置换回收系统。
进一步地，所述尾气置换回收系统包含鼓风机、鼓风机出口阀门、排除尾气阀门和尾气收集器，空气从鼓风机的气体进口进入鼓风机内，鼓风机的气体出口通过管道与鼓风机出口阀门的一端连接，鼓风机出口阀门的另一端与干燥机的入口连接，排除尾气阀门一端通过管 道与离心压缩机的出气口连接，排除尾气阀门的另一端通过管道与尾气收集器连接。
进一步地，还包含应急尾气处理装置。
进一步地，所述应急尾气处理装置包含尾气进口调节蝶阀和火炬燃烧器，尾气进口调节蝶阀的一端通过管道与吸收塔的气体出口连接，尾气进口调节蝶阀的另一端通过管道与火炬燃烧器连接。
进一步地，还包含PLC自动调节控制器，PLC自动调节控制器与系统所有阀门连接控制阀门开闭。
本发明与现有技术相比，具有以下优点和效果：
1、本发明由于采用气体加压方式，将尾气加压到反应室内，将尾气中有用成份再次参加反应，从而达到环保要求，解决了回收成本高，回收工艺复杂问题；
2、本发明采用了单级高速离心压缩机，噪音小，效率高，自动化控制程度高，作用是提高尾气压力，作为原料进入反应器内反应；
3、本发明由于采用置换气系统，PLC自动控制各阀门开关，降低了操作人员操作难度，达到可靠稳定要求。
附图说明
图1是本发明的一种石油工业尾气加压回收系统的示意图。
具体实施方式
下面通过实施例对本发明作进一步的详细说明，以下实施例是对本发明的解释而本发明并不局限于以下实施例。
如图1所示，本发明的一种石油工业尾气加压回收系统，包含反应器1、吸收塔2、进口调节阀门3、干燥机4、离心压缩机5和出口调节阀门6，反应器1设置有反应原料进料口，反应器1的尾气出口通过管道与吸收塔2的尾气进口连接，吸收塔2的气体出口通过管道与进口调节阀门3的一端连接，进口调节阀门3的另一端通过管道与干燥机4的进口连接，干燥机4的出口通过管道与离心压缩机5的进气口连接，离心压缩机5的出气口通过管道与出口调节阀门6的一端连接，出口调节阀门6的另一端通过管道与反应器1的气体回收口连接。
在反应器1中，将空气、水蒸气和丙烯混合，在催化剂的作用下，在一定的温度压力条件下，进行氧化反应工段，最终反应物进入吸收塔2，进行吸收分离工段，从塔顶排出尾气，尾气含丙烯气体成份，其余为废氮气、氧气、一氧化碳、二氧化碳、水蒸汽等气体成份。尾气通过进口调节阀门3进入干燥机4，降低尾气中的水蒸汽成份，有效的保证了进离心压缩 机5不出现液态冷凝水，对压缩机起到保护作用。尾气经过加压后，通过出口调节阀门6重新回到反应器1反应，避免了尾气中丙烯气体浪费。当系统产量或压力变化时，进口调节阀门3与出口调节阀门6可用于调节离心压缩机5运行工况，两个阀门可分别调节，也可联合调节者配合使用。
一种石油工业尾气加压回收系统还包含防喘振装置、尾气置换回收系统、应急尾气处理装置和PLC自动调节控制器，PLC自动调节控制器与系统所有阀门连接控制阀门开闭。
防喘振装置包含防喘振调节阀门7、冷却器8和回流冷却水蝶阀9，离心压缩机5的出气口通过管道与防喘振调节阀门7的一端连接，防喘振调节阀门7的另一端通过管道与冷却器8的气体进口连接，冷却器8的气体出口通过管道与离心压缩机5的气体进口连接，冷却器8的冷却水进口通过管道与回流冷却水蝶阀9的一端连接，冷却水从回流冷却水蝶阀9的另一端流入，冷却水从冷却器8的冷却水出口流出。当离心压缩机5喘振时，PLC自动控制系统16打开防喘振调节阀门7，同时自动打开回流冷却水进水蝶阀9，冷却器8开始工作，根据回流后温度自动调节冷却水水量。
尾气置换回收系统包含鼓风机10、鼓风机出口阀门11、排除尾气阀门12和尾气收集器13，空气从鼓风机10的气体进口进入鼓风机10内，鼓风机10的气体出口通过管道与鼓风机出口阀门11的一端连接，鼓风机出口阀门11的另一端与干燥机4的入口连接，排除尾气阀门12一端通过管道与离心压缩机5的出气口连接，排除尾气阀门12的另一端通过管道与尾气收集器13连接。离心压缩机5停止工作时，管道里留有尾气，通过置换气系统，将尾气排出，该套系统包含鼓风机10、鼓风机出口阀门11、排出尾气阀门12和尾气收集器13，通过PLC自动调节控制系统16自动操作，降低操作人员难度。
应急尾气处理装置包含尾气进口调节蝶阀14和火炬燃烧器15，尾气进口调节蝶阀14的一端通过管道与吸收塔1的气体出口连接，尾气进口调节蝶阀14的另一端通过管道与火炬燃烧器15连接。尾气处理，包含尾气进口调节蝶阀14和火炬燃烧15，当回收装置发生意外情况发生，临时打开调节阀门，对尾气临时处理，避免尾气直接排放。
本发明由于采用气体加压方式，将尾气加压到反应室内，将尾气中有用成份再次参加反应，从而达到环保要求，解决了回收成本高，回收工艺复杂问题；本发明采用了单级高速离心压缩机，噪音小，效率高，自动化控制程度高，作用是提高尾气压力，作为原料进入反应器内反应；本发明由于采用置换气系统，PLC自动控制各阀门开关，降低了操作人员操作难度，达到可靠稳定要求。
本说明书中所描述的以上内容仅仅是对本发明所作的举例说明。本发明所属技术领域的 技术人员可以对所描述的具体实施例做各种修改或补充或采用类似的方式替代，只要不偏离本发明说明书的内容或者超越本权利要求书所定义的范围，均应属于本发明的保护范围。

Claims (8)

  1. 一种石油工业尾气加压回收系统，其特征在于：包含反应器、吸收塔、进口调节阀门、干燥机、离心压缩机和出口调节阀门，反应器设置有反应原料进料口，反应器的尾气出口通过管道与吸收塔的尾气进口连接，吸收塔的气体出口通过管道与进口调节阀门的一端连接，进口调节阀门的另一端通过管道与干燥机的进口连接，干燥机的出口通过管道与离心压缩机的进气口连接，离心压缩机的出气口通过管道与出口调节阀门的一端连接，出口调节阀门的另一端通过管道与反应器的气体回收口连接。
  2. 按照权利要求1所述的一种石油工业尾气加压回收系统，其特征在于：还包含防喘振装置。
  3. 按照权利要求2所述的一种石油工业尾气加压回收系统，其特征在于：所述防喘振装置包含防喘振调节阀门、冷却器和回流冷却水蝶阀，离心压缩机的出气口通过管道与防喘振调节阀门的一端连接，防喘振调节阀门的另一端通过管道与冷却器的气体进口连接，冷却器的气体出口通过管道与离心压缩机的气体进口连接，冷却器的冷却水进口通过管道与回流冷却水蝶阀的一端连接，冷却水从回流冷却水蝶阀的另一端流入，冷却水从冷却器的冷却水出口流出。
  4. 按照权利要求1所述的一种石油工业尾气加压回收系统，其特征在于：还包含尾气置换回收系统。
  5. 按照权利要求4所述的一种石油工业尾气加压回收系统，其特征在于：所述尾气置换回收系统包含鼓风机、鼓风机出口阀门、排除尾气阀门和尾气收集器，空气从鼓风机的气体进口进入鼓风机内，鼓风机的气体出口通过管道与鼓风机出口阀门的一端连接，鼓风机出口阀门的另一端与干燥机的入口连接，排除尾气阀门一端通过管道与离心压缩机的出气口连接，排除尾气阀门的另一端通过管道与尾气收集器连接。
  6. 按照权利要求1所述的一种石油工业尾气加压回收系统，其特征在于：还包含应急尾气处理装置。
  7. 按照权利要求6所述的一种石油工业尾气加压回收系统，其特征在于：所述应急尾气处理装置包含尾气进口调节蝶阀和火炬燃烧器，尾气进口调节蝶阀的一端通过管道与吸收塔的气体出口连接，尾气进口调节蝶阀的另一端通过管道与火炬燃烧器连接。
  8. 按照权利要求1所述的一种石油工业尾气加压回收系统，其特征在于：还包含PLC自动调节控制器，PLC自动调节控制器与系统所有阀门连接控制阀门开闭。
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