WO2021227521A1 - 一种煤气洗净装置及煤气系统 - Google Patents

一种煤气洗净装置及煤气系统 Download PDF

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Publication number
WO2021227521A1
WO2021227521A1 PCT/CN2020/140763 CN2020140763W WO2021227521A1 WO 2021227521 A1 WO2021227521 A1 WO 2021227521A1 CN 2020140763 W CN2020140763 W CN 2020140763W WO 2021227521 A1 WO2021227521 A1 WO 2021227521A1
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gas
inner cylinder
outer cylinder
cleaning device
lye
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PCT/CN2020/140763
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English (en)
French (fr)
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胡学羽
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中冶南方工程技术有限公司
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Publication of WO2021227521A1 publication Critical patent/WO2021227521A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
    • C10K1/10—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids
    • C10K1/12—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors

Definitions

  • the utility model relates to the technical field of gas processing, in particular to a gas cleaning device and a gas system.
  • the blast furnace uses steel plates as the furnace shell, and the shell is lined with refractory bricks. From top to bottom, the blast furnace body is divided into 5 parts: throat, body, waist, belly, and hearth. Due to the good technical and economic indicators of blast furnace ironmaking, simple process, large production, high labor productivity, and low energy consumption, the iron produced by this method accounts for most of the world's total iron output.
  • iron ore, coke, and flux (limestone) for slag-making are loaded from the top of the furnace, and preheated air is blown in from the tuyere located at the bottom of the furnace along the periphery of the furnace.
  • the carbon in coke (some blast furnaces are also injected with auxiliary fuels such as pulverized coal, heavy oil, natural gas) and carbon monoxide and hydrogen generated by the combustion of oxygen in the air will remove the iron ore in the process of rising in the furnace. Oxygen, thereby reducing iron.
  • the molten iron produced is discharged from the iron hole.
  • the unreduced impurities in the iron ore are combined with fluxes such as limestone to form slag, which is discharged from the slag port.
  • the generated gas is discharged from the top of the furnace, and after dust removal, it is used as fuel for hot blast stoves, heating furnaces, coke ovens, boilers, etc.
  • the main product of blast furnace smelting is pig iron, as well as by-products of blast furnace slag and blast furnace gas.
  • the utility model provides a gas cleaning device, which solves the technical problem that the pipelines and related equipment of the downstream blast furnace gas system in the prior art are prone to rapid corrosion and blockage, thereby affecting the normal operation of the entire gas system.
  • a gas cleaning device the gas cleaning device includes an outer cylinder, an inner cylinder and at least one lye spray head; the outer cylinder is sleeved on the inner cylinder, Each of the lye spray heads is fixed on the inner cylinder and sprays liquid into its inner cavity, a gas passage is provided between the outer cylinder and the inner cylinder, and one end of the inner cylinder is provided with a gas inlet, so The other end of the inner cylinder is provided with a gas-liquid separation opening, the gas channel is communicated with the gas-liquid separation opening, and the outer cylinder is provided with a gas outlet communicating with the gas channel.
  • the inner cylinder has a converging nozzle structure, and the cross-sectional area at both ends of the inner cylinder is smaller than the cross-sectional area at the middle of the inner cylinder.
  • cross-sectional area of the gas inlet is smaller than the cross-sectional area of the gas-liquid separation opening.
  • the central axis of the outer cylinder is in the vertical direction; the gas inlet pipe is located at the upper end of the outer cylinder, and the gas-liquid separation opening is located at the lower end of the outer cylinder.
  • the gas outlet is located on one side of the upper part of the outer cylinder, a gas outlet pipe is provided at the gas outlet, and the gas outlet pipe is arranged horizontally.
  • the outer cylinder is installed on a fixed foundation, the fixed foundation is provided with a sump, each of the lye spray heads is installed on the gas inlet pipe and arranged horizontally, and the gas cleaning device further includes an alkali A liquid circulation system, each of the lye spray heads is connected to the sump through the lye circulation system.
  • the lower end of the inner cylinder is provided with an inner cylinder frame, and the inner cylinder frame is fixed in the water collecting tank.
  • a dehydration layer is installed in the gas channel.
  • a support frame is provided in the gas passage, and the dehydration layer is installed in the gas passage through the support frame.
  • the gas cleaning device is designed as a double-layer structure of an outer cylinder and an inner cylinder, and the inner cylinder is used for acid-base neutralization reaction to remove acidic substances in the gas, so that it can be purified and contains lye.
  • the gas is separated in the gas-liquid separation opening and the gas channel, and finally discharged from the gas outlet to the gas system pipeline, which solves the problem that the downstream blast furnace gas system pipeline and related equipment in the prior art are prone to rapid corrosion and blockage.
  • the gas discharged from the blast furnace system passes through the gas inlet pipe of the inner cylinder, reacts with the lye sprayed by the lye spray head, and then passes through the gas-liquid separation opening along the inner cylinder wall and then enters the gas channel.
  • the gas containing the lye The gas-liquid separation is carried out in the gas-liquid separation opening and the gas channel, and finally discharged from the gas outlet pipe.
  • the utility model also provides a gas system.
  • a gas system includes a gas cleaning device and a gas system body, the gas system body is connected with the gas outlet pipe.
  • Figure 1 is a schematic diagram of the internal structure of a gas cleaning device provided by an embodiment of the utility model.
  • a component when a component is said to be “fixed to” another component, it can be directly connected to the other component or a central component may also exist.
  • a component When a component is considered to be “connected” to another component, it can be directly connected to the other component or there may be a centered component at the same time.
  • a component When a component is considered to be “installed on” another component, it can be directly installed on another component or a centered component may exist at the same time.
  • the terms “vertical”, “horizontal”, “left”, “right” and similar expressions used herein are for illustrative purposes only.
  • the present invention provides a gas cleaning device.
  • the gas cleaning device 100 includes an outer tube 10, an inner tube 20, and at least one lye spray head 30; the outer tube 10 is sleeved in The inner cylinder 20, each of the lye spray heads 30 is fixed on the inner cylinder 20 and sprays liquid into the inner cavity of the inner cylinder 20, a gas passage is provided between the outer cylinder 10 and the inner cylinder 20, the One end of the inner cylinder 2 is provided with a gas inlet pipe 21, the other end of the inner cylinder 20 is provided with a gas-liquid separation opening 22, the gas inlet pipe 21 is connected to the gas-liquid separation opening 22, the outer cylinder 10 There is a gas outlet pipe 11 on it.
  • the gas passage refers to a pipe located between the inner wall of the outer cylinder 10 and the outer wall of the inner cylinder 20.
  • the gas discharged from the blast furnace system passes through the gas inlet pipe 21 of the inner cylinder 20, reacts with the lye sprayed from the lye spray head 30, and then enters the gas channel after passing through the gas-liquid separation opening 22 along the pipe wall of the inner cylinder 20.
  • the gas containing alkali liquid undergoes gas-liquid separation in the gas-liquid separation opening 22 and the gas channel, and finally the clean gas is discharged from the gas outlet pipe 11.
  • the gas cleaning device 100 is designed as a double-layer structure of the outer tube 10 and the inner tube 20.
  • the inner tube 20 is used for acid-base neutralization reaction to remove acidic substances in the coal gas, so that it can be purified and contains lye.
  • the gas is separated from the gas in the gas-liquid separation opening 22 and the gas channel, and finally discharged from the gas outlet pipe 11 to the gas system pipeline, which solves the problem that the downstream blast furnace gas system pipeline and related equipment in the prior art are prone to rapid corrosion And blockages that affect the normal operation of the entire gas system.
  • the new device can effectively slow down the corrosion rate of the blast furnace gas pipeline and auxiliary equipment, and ensure the long-term stable operation of the gas system.
  • the gas-liquid separation in the gas-liquid separation opening 22 and the gas-liquid separation opening 22 and the gas channel can be used for gas-liquid separation by means of gravity factors or flow velocity.
  • the lye spray head 30 can be connected to an external lye pump.
  • the lye spray head can be connected to the circulating lye pipe through the pipeline, and a flow regulating valve can be installed at the inlet of the circulating lye pipe, which is interlocked with the gas pressure, flow temperature and other parameter detection values to adjust and set the lye spray speed and flow.
  • the inner cylinder 20 has a zoom nozzle structure, and the cross-sectional area at both ends of the inner cylinder 20 is smaller than the cross-sectional area of the middle part.
  • the inner cylinder 2 as a zooming nozzle structure, the middle nozzle is reduced, which facilitates the thorough mixing of gas and lye in the middle, improves the acid-base neutralization reaction efficiency, and prolongs the mixing time.
  • the cross-sectional area of the gas inlet pipe 21 is smaller than the cross-sectional area of the gas-liquid separation opening 22.
  • the central axis of the outer cylinder 10 is in the vertical direction; the gas inlet pipe 21 is located at the upper end of the outer cylinder 10, and the gas-liquid separation opening 22 is located at the lower end of the outer cylinder 10 to facilitate
  • the gravity factor is used for gas transmission and gas-liquid separation.
  • a gas outlet pipe 11 is provided on one side of the upper part of the outer cylinder 10, and the gas outlet pipe 11 is arranged horizontally.
  • the outer cylinder 10 is installed on a fixed foundation 101, the fixed foundation 101 is provided with a sump 90, each of the lye spray heads 30 is installed on the gas inlet pipe 21 and arranged horizontally, the
  • the gas cleaning device 100 further includes a lye circulation system, and each of the lye spray heads 30 is connected to the sump 90 through the lye circulation system.
  • the gas stream entrains and drops the lye and impacts the lye in the collection tank, the surface of the lye forms fluctuations, and the gas and the lye in the lye pool form a secondary contact.
  • the outer cylinder 10 is designed without a bottom plate, and the sump 90 is placed under the foundation surface, which can effectively reduce the height of the tower and reduce the investment.
  • the lye spraying direction of the lye spraying head 30 is in the same direction as the gas flow, and a full gas-liquid contact is formed through the inner tube expansion nozzle to effectively remove the acidic components contained in the blast furnace gas.
  • the gas and lye are fully mixed in the inner cylinder, and the liquid level in the lye pool is impacted, and the gas and liquid are separated, and the gas flow direction is reversed and enters the annular gas phase channel; the gas and lye are fully mixed in the inner cylinder, and the liquid level in the lye pool After the shock is formed, the gas and liquid separate, and the gas flow direction is reversed and enters the annular gas phase channel.
  • an inner cylinder frame 80 is provided at the lower end of the inner cylinder 20, and the inner cylinder frame 80 is fixed in the collecting basin 90. It is understandable that there is a certain space between the inner cylinder 20 and the water surface of the alkali recovery tank to realize the reverse flow of gas.
  • a dehydration layer 60 is installed in the gas channel.
  • the dehydration layer can be designed as a combination of stainless steel wire mesh and aluminum alloy rosette filler, which can effectively remove the mechanical water contained in the gas and meet the user's requirements for the combustion temperature of the gas; of course, the dehydration layer can also be cotton material or any other dewatering function The material.
  • a support frame 70 is provided in the gas passage, and the dehydration layer 60 is installed in the gas passage through the support frame 70.
  • the lower end of the outer cylinder 10 is provided with an outer cylinder bottom plate 102, and the outer cylinder 10 is fixedly connected to the fixed foundation 101 through the outer cylinder bottom plate 102.
  • a plurality of maintenance platforms 40 and maintenance manholes 50 are provided on the gas outlet pipe 11, and a maintenance platform 40 and maintenance manholes 50 are provided on the outer cylinder 10.
  • the utility model also provides a gas system, which includes a gas cleaning device 100 and a gas system body, and the gas system body is in communication with the gas outlet pipe 11.
  • the gas cleaning device and gas system of the present invention can also be applied to any other gas sources with acidic impurities, which fall within the protection scope of the present invention.
  • the impurity gas discharged from the blast furnace system passes through the gas inlet pipe 21 of the inner cylinder 20, and after neutralizing with the lye sprayed by the lye spray head 30, it penetrates along the inner cylinder 20 wall. After passing through the gas-liquid separation opening 22, it enters the gas channel. The gas containing lye undergoes the first gas-liquid separation in the gas-liquid separation opening 22 and the gas channel, and then performs a second separation at the dehydration layer 60, and finally The gas outlet pipe 11 discharges clean gas.
  • the utility model has relatively simple structure, low system investment and convenient maintenance; the blast furnace gas cleaning device 100 of the utility model can remove more than 98% of acid gas components in blast furnace gas, the gas pressure loss is less than 2kPa, and the outlet gas mechanical water content Less than 5g/m3.
  • the utility model aims at deacidification and desalination of blast furnace gas under dry dust removal operation conditions, reducing the acid environment of gas condensate water and the pollution and corrosion of various salt ions on pipelines and auxiliary equipment; at the same time, it simplifies peripheral auxiliary facilities and reduces the environment Pollution.
  • the utility model mainly aims at solving the corrosion of carbon steel pipes and equipment caused by the formation of a strong acidic water-soluble environment after the acidic components in the blast furnace gas in the blast furnace gas of the iron and steel industry are dissolved in the gas condensate, and the pitting corrosion of the stainless steel equipment caused by the high concentration of chloride ions in the condensed water.
  • gas-liquid flow channels By rationally arranging the gas-liquid flow channels, using methods such as gas-liquid two-phase acid-base neutralization, liquid level fluctuation absorption, gas-liquid contact in the same direction, etc., increase the contact time of lye and acidic components in the gas, and improve the efficiency of gas cleaning.
  • the effective removal rate can reach more than 98%.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

本实用新型涉及一种煤气洗净装置，包括外筒、内筒及碱液喷射头；外筒套设于内筒，各碱液喷射头固定于内筒上并向其内腔喷液，外筒与内筒之间设有煤气通道，内筒一端设有煤气进口，内筒另一端设有气液分离开口，煤气通道与气液分离开口连通，外筒上设有煤气出口。本实用新型通过将煤气洗净装置设计为双层结构，内筒用于酸碱中和反应除去煤气中的酸性物质，使之得到净化，含有碱液的煤气在气液分离开口及煤气通道中气液分离，最后从煤气出口管道处排出至煤气系统管道，解决现有技术中下游高炉煤气系统管道及相关设备容易发生快速腐蚀及堵塞从而影响整个煤气系统正常运行的技术问题；双层结构的流道布置使得煤气与碱液可以充分接触。

Description

一种煤气洗净装置及煤气系统 技术领域
本实用新型涉及煤气处理的技术领域，具体涉及一种煤气洗净装置及煤气系统。
背景技术
高炉是用钢板作炉壳，壳内砌耐火砖内衬。高炉本体自上而下分为炉喉、炉身、炉腰、炉腹、炉缸5部分。由于高炉炼铁技术经济指标良好，工艺简单，生产量大，劳动生产效率高，能耗低等优点，故这种方法生产的铁占世界铁总产量的绝大部分。高炉生产时从炉顶装入铁矿石、焦炭、造渣用熔剂(石灰石)，从位于炉子下部沿炉周的风口吹入经预热的空气。在高温下焦炭(有的高炉也喷吹煤粉、重油、天然气等辅助燃料)中的碳同鼓入空气中的氧燃烧生成的一氧化碳和氢气，在炉内上升过程中除去铁矿石中的氧，从而还原得到铁。炼出的铁水从铁口放出。铁矿石中未还原的杂质和石灰石等熔剂结合生成炉渣，从渣口排出。产生的煤气从炉顶排出，经除尘后，作为热风炉、加热炉、焦炉、锅炉等的燃料。高炉冶炼的主要产品是生铁，还有副产品高炉渣和高炉煤气。
然而，目前国内大部分高炉系统对其内部产生的煤气采用干法除尘工艺之后排出，下游高炉煤气系统管道及相关设备会发生一定的腐蚀现象，较为严重的表现为煤气管道穿孔，补偿器孔蚀开裂、煤气阀门及减压阀组等部件腐蚀、固态盐类结垢堵塞等。研究结果显示高炉煤气管道及附属设施发生腐蚀的根本原因是煤气冷凝水中H+、Cl-离 子严重超标。这种快速腐蚀给煤气系统正常运行带来了严重的安全隐患，高炉煤气系统工艺改造的任务迫在眉睫。是故亟待改善。
实用新型内容
本实用新型提供了一种煤气洗净装置，解决了现有技术中下游高炉煤气系统管道及相关设备容易发生快速腐蚀及堵塞从而影响整个煤气系统正常运行的技术问题。
本实用新型解决上述技术问题的方案如下：一种煤气洗净装置，所述煤气洗净装置包括外筒、内筒及至少一个碱液喷射头；所述外筒套设于所述内筒，各所述碱液喷射头固定于所述内筒上并向其内腔喷液，所述外筒与所述内筒之间设有煤气通道，所述内筒的一端设有煤气进口，所述内筒的另一端设有气液分离开口，所述煤气通道与所述气液分离开口相连通，所述外筒上设有与所述煤气通道相通的煤气出口。
当煤气在所述内筒的内腔流动时，可穿过气液分离开口流入煤气通道。煤气进口处设有煤气进口管道。
进一步，所述内筒为缩放喷管结构，所述内筒两端的横截面积小于其中部的横截面积。
进一步，所述煤气进口的横截面积小于所述气液分离开口的横截面积。
进一步，所述外筒的中心轴线处于竖直方向上；所述煤气进口管道位于所述外筒的上端，所述气液分离开口位于所述外筒的下端。
进一步，所述煤气出口位于外筒上部的一侧，所述煤气出口处设有煤气出口管道，所述煤气出口管道水平设置。
进一步，所述外筒安装于固定基础上，所述固定基础内设有集水池，各所述碱液喷射头安装于所述煤气进口管道上并水平设置，所述煤气洗净装置还包括碱液循环系统，各所述碱液喷射头通过所述碱液循环系统与所述集水池相连通。
进一步，所述内筒的下端设有内筒机架，所述内筒机架固定于所述集水池内。
进一步，所述煤气通道内安装有脱水层。
进一步，所述煤气通道内设有支撑架，所述脱水层通过所述支撑架安装于所述煤气通道内。
本实用新型的有益效果是：通过将煤气洗净装置设计为外筒及内筒的双层结构，内筒用于酸碱中和反应除去煤气中的酸性物质，使之得到净化，含有碱液的煤气在气液分离开口及煤气通道中进行气液分离，最后从所述煤气出口处排出至煤气系统管道，解决了现有技术中下游高炉煤气系统管道及相关设备容易发生快速腐蚀及堵塞从而影响整个煤气系统正常运行的技术问题；双层结构的流道布置使得煤气与碱液可以充分接触。
高炉系统排出的煤气经过内筒的煤气进口管道，与碱液喷射头喷出的碱液中和反应后沿内筒管壁穿过气液分离开口后进入到煤气通道中，含有碱液的煤气在气液分离开口及煤气通道中进行气液分离，最后从所述煤气出口管道处排出。
本实用新型还提供了一种煤气系统。
其技术方案如下：一种煤气系统，包括煤气洗净装置及煤气系统本体，所述煤气系统本体与所述煤气出口管道连通。
上述说明仅是本实用新型技术方案的概述，为了能够更清楚了解 本实用新型的技术手段，并可依照说明书的内容予以实施，以下以本实用新型的较佳实施例并配合附图详细说明如后。本实用新型的具体实施方式由以下实施例及其附图详细给出。
附图说明
此处所说明的附图用来提供对本实用新型的进一步理解，构成本申请的一部分，本实用新型的示意性实施例及其说明用于解释本实用新型，并不构成对本实用新型的不当限定。在附图中：
图1为本实用新型一实施例提供的一种煤气洗净装置的内部结构示意图。
附图中，各标号所代表的部件列表如下：
100、煤气洗净装置；10、外筒；11、煤气出口管道；20、内筒；21、煤气进口管道；22、气液分离开口；30、碱液喷射头；40、维修平台；50、检修人孔；60、脱水层；70、支撑架；80、内筒机架；90、集水池；101、固定基础；102、外筒底板。
具体实施方式
以下结合附图1对本实用新型的原理和特征进行描述，所举实例只用于解释本实用新型，并非用于限定本实用新型的范围。在下列段落中参照附图以举例方式更具体地描述本实用新型。根据下面说明和权利要求书，本实用新型的优点和特征将更清楚。需说明的是，附图均采用非常简化的形式且均使用非精准的比例，仅用以方便、明晰地辅助说明本实用新型实施例的目的。
需要说明的是，当组件被称为“固定于”另一个组件，它可以直 接在另一个组件上或者也可以存在居中的组件。当一个组件被认为是“连接”另一个组件，它可以是直接连接到另一个组件或者可能同时存在居中组件。当一个组件被认为是“设置于”另一个组件，它可以是直接设置在另一个组件上或者可能同时存在居中组件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的。
除非另有定义，本文所使用的所有的技术和科学术语与属于本实用新型的技术领域的技术人员通常理解的含义相同。本文中在本实用新型的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本实用新型。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
如图1所示，本实用新型提供了一种煤气洗净装置，所述煤气洗净装置100包括外筒10、内筒20及至少一个碱液喷射头30；所述外筒10套设于所述内筒20，各所述碱液喷射头30固定于所述内筒20上并向其内腔喷液，所述外筒10与所述内筒20之间设有煤气通道，所述内筒2的一端设有煤气进口管道21，所述内筒20的另一端设有气液分离开口22，所述煤气进口管道21与所述气液分离开口22相连通，所述外筒10上设有煤气出口管道11。
可以理解的是，煤气通道是指位于外筒10内壁与内筒20外壁之间的管道。
高炉系统排出的煤气经过内筒20的煤气进口管道21，与碱液喷射头30喷出的碱液中和反应后沿内筒20管壁穿过气液分离开口22后进入到煤气通道中，含有碱液的煤气在气液分离开口22及煤气通道中进行气液分离，最后从所述煤气出口管道11处排出净煤气。
上述实施例中通过将煤气洗净装置100设计为外筒10及内筒20的双层结构，内筒20用于酸碱中和反应除去煤气中的酸性物质，使之得到净化，含有碱液的煤气在气液分离开口22及煤气通道中进行气液分离，最后从所述煤气出口管道11处排出至煤气系统管道，解决了现有技术中下游高炉煤气系统管道及相关设备容易发生快速腐蚀及堵塞从而影响整个煤气系统正常运行的技术问题。
利用酸碱中和原理，采用特殊流道布置实现煤气与碱液充分接触，高效脱除煤气中所含酸性成分。该新型装置能有效减缓高炉煤气管道及附属设备的腐蚀速度，保障煤气系统长期稳定运行。
需要指出的是，含有碱液的煤气在气液分离开口22及煤气通道中可借助重力因素或者流动速度进行气液分离。碱液喷射头30可与外界碱液泵连通。此外，碱液喷头可通过管道与循环碱液管连接、循环碱液管道入口设置流量调节阀，与煤气压力、流量温度等参数检测值联锁，调节设置碱液喷射速度及流量。
优选的，所述内筒20为缩放喷管结构，所述内筒20两端的横截面积小于其中部的横截面积。通过将内筒2设计为缩放喷管结构，中部管口缩小，有利于煤气与碱液之间在中部进行充分混合，提高其酸碱中和反应效率，且延长混合时间。
优选的，为了便于含有碱液的煤气沿管向进行快速有效传送，所述煤气进口管道21的横截面积小于所述气液分离开口22的横截面积。
优选的，所述外筒10的中心轴线处于竖直方向上；所述煤气进口管道21位于所述外筒10的上端，所述气液分离开口22位于所述外筒10的下端，以便于利用重力因素进行煤气传送和气液分离。
优选的，为利用重力因素延长气液分离时间、提高气液分离效率， 所述外筒10上部的一侧设有煤气出口管道11，所述煤气出口管道11水平设置。
优选的，所述外筒10安装于固定基础101上，所述固定基础101内设有集水池90，各所述碱液喷射头30安装于所述煤气进口管道21上并水平设置，所述煤气洗净装置100还包括碱液循环系统，各所述碱液喷射头30通过所述碱液循环系统与所述集水池90相连通。煤气气流夹带下降碱液冲击收集池内碱液，碱液表面形成波动，煤气与碱液池里的碱液形成二次接触。
其中外筒10采用无底板设计，将集水池90置于基础面之下，可有效降低塔体高度，降低投资。碱液喷射头30的碱液喷淋方向与煤气气流同向，经内筒缩放喷管形成气液充分接触，有效脱除高炉煤气中所含酸性成分。煤气与碱液在内筒内充分混合，对碱液池内液面形成冲击后气液分离，煤气流向发生逆转进入环形气相通道；煤气与碱液在内筒内充分混合，对碱液池内液面形成冲击后气液分离，煤气流向发生逆转进入环形气相通道。
优选的，为保证在流体冲击下装置的稳定性，所述内筒20的下端设有内筒机架80，所述内筒机架80固定于所述集水池90内。可以理解的是，所述内筒20与碱液回收池水面存在一定空间可实现煤气逆向流动。
优选的，为提交脱水效率，所述煤气通道内安装有脱水层60。
脱水层可设计成不锈钢丝网与铝合金花环填料的组合，高效脱除煤气中所含机械水，满足用户对煤气燃烧温度的要求；当然脱水层还可以是棉质材料以及其他任何具有脱水功能的材质。
优选的，所述煤气通道内设有支撑架70，所述脱水层60通过所 述支撑架70安装于所述煤气通道内。
优选的，所述外筒10的下端设有外筒底板102，所述外筒10通过所述外筒底板102与固定基础101固定连接。
所述煤气出口管道11上设有多个维修平台40及检修人孔50，所述外筒10上设有维修平台40及检修人孔50。
本实用新型还提供了一种煤气系统，包括煤气洗净装置100及煤气系统本体，所述煤气系统本体与所述煤气出口管道11连通。
需要指出的是，本实用新型中煤气洗净装置及煤气系统除了应用于高炉系统领域之外，还可以应用于其他任何带有酸性杂质的煤气来源，均属于本实用新型的保护范围之内。
本实用新型的具体工作原理及使用方法为：高炉系统排出的杂质煤气经过内筒20的煤气进口管道21，与碱液喷射头30喷出的碱液中和反应后沿内筒20管壁穿过气液分离开口22后进入到煤气通道中，含有碱液的煤气在气液分离开口22及煤气通道中进行第一次气液分离，然后在脱水层60处进行二次分离，最后从所述煤气出口管道11处排出净煤气。
本实用新型结构较为简单、系统投资少且维护方便；本实用新型高炉煤气洗净装置100对高炉煤气中酸性气体成分脱除率能达到98％以上，煤气压力损失＜2kPa，出口煤气机械水含量低于5g/m3。
本实用新型旨在对干法除尘运行条件下高炉煤气进行脱酸除盐，减少煤气冷凝水酸性环境及各种盐类离子对管道及附属设备的污染 腐蚀；同时简化外围配套辅助设施，降低环境污染。
本实用新型主要为解决钢铁行业高炉煤气中的酸性成分溶于煤气冷凝水之后，形成强酸性水溶环境对碳钢管道及设备的腐蚀，以及冷凝水中高浓度氯离子对不锈钢设备产生点蚀。
通过合理布置气液流道，分别利用气液两相酸碱中和、液面波动吸收、气液同向接触等方法增加碱液与煤气中酸性成分接触时间，提高煤气洗净效率，酸性成分有效脱除率能达到98％以上。
以上所述，仅为本实用新型的较佳实施例而已，并非对本实用新型作任何形式上的限制；凡本行业的普通技术人员均可按说明书附图所示和以上所述而顺畅地实施本实用新型；但是,凡熟悉本专业的技术人员在不脱离本实用新型技术方案范围内，利用以上所揭示的技术内容而做出的些许更动、修饰与演变的等同变化，均为本实用新型的等效实施例；同时,凡依据本实用新型的实质技术对以上实施例所作的任何等同变化的更动、修饰与演变等，均仍属于本实用新型的技术方案的保护范围之内。

Claims (10)

  1. 一种煤气洗净装置，其特征在于，所述煤气洗净装置(100)包括外筒(10)、内筒(20)及至少一个碱液喷射头(30)；
    所述外筒(10)套设于所述内筒(20)，各所述碱液喷射头(30)固定于所述内筒(20)上并向其内腔喷液，所述外筒(10)与所述内筒(20)之间设有煤气通道，所述内筒(2)的一端设有煤气进口，所述内筒(20)的另一端设有气液分离开口(22)，所述煤气通道与所述气液分离开口(22)相连通，所述外筒(10)上设有与所述煤气通道相通的煤气出口。
  2. 根据权利要求1所述一种煤气洗净装置，其特征在于，所述内筒(20)为缩放喷管结构，所述内筒(20)两端的横截面积小于其中部的横截面积。
  3. 根据权利要求2所述一种煤气洗净装置，其特征在于，所述煤气进口的横截面积小于所述气液分离开口(22)的横截面积。
  4. 根据权利要求1所述一种煤气洗净装置，其特征在于，所述外筒(10)的中心轴线处于竖直方向上；所述煤气进口位于所述外筒(10)的上端，所述气液分离开口(22)位于所述外筒(10)的下端。
  5. 根据权利要求1所述一种煤气洗净装置，其特征在于，所述煤气出口位于外筒(10)上部的一侧，所述煤气出口处设有煤气出口管道(11)，所述煤气出口管道(11)水平设置。
  6. 根据权利要求1所述一种煤气洗净装置，其特征在于，所述外筒(10)安装于固定基础(101)上，所述固定基础(101)内设有集水池(90)，各所述碱液喷射头(30)安装于所述煤气进口上并水平设置，所述煤气洗净装置(100)还包括碱液循环系统，各所述碱液喷射头(30)通过所述碱液循环系统与所述集水池(90)相连通。
  7. 根据权利要求6所述一种煤气洗净装置，其特征在于，所述内筒(20)的下端设有内筒机架(80)，所述内筒机架(80)固定于所述集水池(90)内。
  8. 根据权利要求1所述一种煤气洗净装置，其特征在于，所述煤气通道内安装有脱水层(60)。
  9. 根据权利要求8所述一种煤气洗净装置，其特征在于，所述煤气通道内设有支撑架(70)，所述脱水层(60)通过所述支撑架(70)安装于所述煤气通道内。
  10. 一种煤气系统，其特征在于，包括根据权利要求1-9任一所述煤气洗净装置(100)及煤气系统本体，所述煤气系统本体与所述煤气出口连通。
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