WO2021227095A1 - 一种用于消失模铸造的有机废气吸附脱附净化装置 - Google Patents

一种用于消失模铸造的有机废气吸附脱附净化装置 Download PDF

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WO2021227095A1
WO2021227095A1 PCT/CN2020/091138 CN2020091138W WO2021227095A1 WO 2021227095 A1 WO2021227095 A1 WO 2021227095A1 CN 2020091138 W CN2020091138 W CN 2020091138W WO 2021227095 A1 WO2021227095 A1 WO 2021227095A1
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adsorption
desorption
valve
bed
waste gas
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PCT/CN2020/091138
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English (en)
French (fr)
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谈敏
姚建堂
靳亮
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湖州南丰机械制造有限公司
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Publication of WO2021227095A1 publication Critical patent/WO2021227095A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/38—Removing components of undefined structure
    • B01D53/44—Organic components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B22C9/04—Use of lost patterns
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material

Definitions

  • the invention relates to an organic waste gas adsorption and desorption purification device used for lost foam casting.
  • Lost foam casting is to combine paraffin wax or foam models similar to the size and shape of the castings into model clusters. After brushing with refractory paint and drying, they are buried in dry quartz sand for vibration modeling and poured under negative pressure to gasify the model. , The liquid metal occupies the position of the model and forms a new casting method after solidification and cooling.
  • the present invention provides an organic waste gas adsorption and desorption purification device for lost foam casting, thereby effectively solving the problems pointed out in the background art.
  • an organic waste gas adsorption and desorption purification device for lost foam casting comprising an adsorption system and a desorption system, and the adsorption system includes a buffer tank, a pretreatment device, and an adsorption
  • the adsorption device includes a first adsorption bed and a second adsorption bed.
  • the adsorption system is provided with a first front adsorption valve and a second adsorption valve at the front ends of the first adsorption bed and the second adsorption bed.
  • the front adsorption valve, the rear end is respectively provided with a first rear adsorption valve and a second rear adsorption valve.
  • the desorption system includes a desorption fan, a catalytic combustion furnace, a heat exchanger and a heater connected in sequence.
  • the air inlet of the attached fan is connected to the front ends of the first adsorption bed and the second adsorption bed, and the air outlet of the heater is connected to the rear ends of the first adsorption bed and the second adsorption bed.
  • the front ends of the bed and the second adsorption bed are respectively provided with a first front desorption valve and a second front desorption valve, and the rear ends are respectively provided with a first rear desorption valve and a second rear desorption valve.
  • the pretreatment device is a coarse filtration device.
  • the coarse filter device can filter the large particles of impurities in the organic waste gas, prevent them from entering the adsorption device, and prolong the service life of the adsorption device.
  • the first adsorption bed and the second adsorption bed are activated carbon adsorption devices.
  • the activated carbon adsorption device can remove the VOC substances in the organic waste gas, and finally meet the emission standards.
  • the exhaust gas outlet of the heat exchanger is connected to a chimney, and the fresh air outlet of the heat exchanger is connected to a heater.
  • the heat in the exhaust gas generated by the combustion of the catalytic combustion furnace is transferred to the fresh air for recycling through the heat exchanger, which not only reduces the heat emission, but also reduces the heating power of the heater.
  • the invention adopts an adsorption system to adsorb the organic pollutants in the organic waste gas.
  • the adsorption When the adsorption is saturated, it can be desorbed by the desorption system.
  • the high concentration organic pollutants produced are burned by a catalytic combustion furnace, and finally decomposed to obtain carbon dioxide and water. The vapor is discharged.
  • Figure 1 is a schematic diagram of the structure of the present invention.
  • an organic waste gas adsorption and desorption purification device for lost foam casting includes an adsorption system and a desorption system.
  • the adsorption system includes a buffer tank 1 and a pretreatment connected in sequence.
  • Device 2 adsorption device 3, adsorption fan 4 and chimney 5.
  • the adsorption device includes a first adsorption bed 31 and a second adsorption bed 32, and the adsorption system is at the front end of the first adsorption bed 31 and the second adsorption bed 32
  • the first front adsorption valve 6 and the second front adsorption valve 7 are respectively provided, and the rear end is respectively provided with a first rear adsorption valve 8 and a second rear adsorption valve 9.
  • the desorption system includes desorption fans connected in sequence. 10.
  • the catalytic combustion furnace 11, the heat exchanger 12 and the heater 13, the air inlet of the desorption fan 10 is connected to the front ends of the first adsorption bed 31 and the second adsorption bed 32, and the air outlet of the heater 13 is connected to The rear end of the first adsorption bed 31 and the second adsorption bed 32 are connected, and the desorption system is provided with a first front desorption valve 14 and a second front desorption valve at the front ends of the first adsorption bed 31 and the second adsorption bed 32, respectively.
  • the attachment valve 15 is provided with a first rear desorption valve 16 and a second rear desorption valve 17 at the rear end respectively.
  • the pretreatment device is a coarse filtration device.
  • the first adsorption bed 31 and the second adsorption bed 32 are activated carbon adsorption devices.
  • the exhaust gas outlet of the heat exchanger 12 is connected to the chimney 5, and the fresh air outlet of the heat exchanger 12 is connected to the heater 13.
  • the working principle of the present invention in the initial state, the first adsorption bed 31 and the second adsorption bed 32 are both in an unsaturated state.
  • the organic waste gas first passes through the buffer tank 1 to obtain a stable air flow, and then passes through the pretreatment device 2 to remove the large particles of impurities in the organic waste gas, and finally removes the organic pollutants in the organic waste gas through the adsorption device 3, from the chimney 5 Exhaust into the atmosphere.
  • the principle of adsorption and desorption first use the first adsorption bed 31 for adsorption: open the first front adsorption valve 6 and the first rear adsorption valve 8, close the second front adsorption valve 7 and the second rear adsorption valve 9, and close the first front adsorption valve Attach valve 14, the second front desorption valve 15, the first post desorption valve 16 and the second post desorption valve 17, and then start the adsorption fan 4 to start the adsorption work.
  • the specific operation is as follows: open the first front desorption valve 14 and the first post desorption valve 16, start the desorption fan 10, the heater 13 and the catalytic combustion furnace 11,
  • the organic pollutants adsorbed by an adsorption bed 31 produce high-concentration organic waste gas under the action of hot gas.
  • the organic waste gas enters the catalytic combustion furnace 11 for combustion.
  • the organic waste gas after combustion under the action of the catalyst is finally decomposed into high-temperature carbon dioxide and Water vapor, carbon dioxide and water vapor are discharged from the chimney 5 after passing through the heat exchanger 12.
  • the fresh air from the outside is heated by the heat exchanger 12, and after passing through the heater 13, it becomes high-temperature air that can be desorbed and enters the first
  • An adsorption bed 31 performs desorption, so that the first adsorption bed 31 is regenerated.
  • the first front desorption valve 14, the first rear desorption valve 16, the desorption fan 10, the heater 13 and the catalytic converter are closed.
  • the combustion furnace 11 waits for the next adsorption operation.
  • the first front adsorption valve 6 and the first rear adsorption valve 8 are opened, the second front adsorption valve 7 and the second rear adsorption valve 9 are closed, and the first adsorption bed 31 is adsorbed. Then the first adsorption bed 31 is desorbed.
  • the specific operation is as follows: open the second front desorption valve 15 and the second post desorption valve 17, start the desorption fan 10, the heater 13 and the catalytic combustion furnace 11, and the second adsorption
  • the organic pollutants adsorbed by the bed 32 produce high-concentration organic waste gas under the action of the hot gas.
  • the organic waste gas enters the catalytic combustion furnace 11 for combustion.
  • the organic waste gas after combustion is finally decomposed into high-temperature carbon dioxide and water vapor under the action of the catalyst.
  • carbon dioxide and water vapor are discharged from the chimney 5.
  • the fresh air from the outside is heated up after passing through the heat exchanger 12, and after passing through the heater 13, it becomes high-temperature air capable of desorption and enters the second adsorption
  • the bed 32 is desorbed, so that the second adsorption bed 32 is regenerated.
  • the second front desorption valve 15, the second rear desorption valve 17, the desorption fan 10, the heater 13 and the catalytic combustion furnace are closed. 11. Wait for the next adsorption operation.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Engineering & Computer Science (AREA)
  • Treating Waste Gases (AREA)

Abstract

一种用于消失模铸造的有机废气吸附脱附净化装置，包括吸附系统和脱附系统，吸附系统包括前后依次相连的缓冲罐（1）、预处理装置（2）、吸附装置（3）、吸附风机（4）和烟囱（5），吸附装置（3）包括第一吸附床（31）和第二吸附床（32），脱附系统包括前后依次相连的脱附风机（10）、催化燃烧炉（11）、换热器（12）和加热器（13）。

Description

一种用于消失模铸造的有机废气吸附脱附净化装置 技术领域
本发明涉及一种用于消失模铸造的有机废气吸附脱附净化装置。
 背景技术
消失模铸造是将与铸件尺寸形状相似的石蜡或泡沫模型粘结组合成模型簇，刷涂耐火涂料并烘干后，埋在干石英砂中振动造型，在负压下浇注，使模型气化，液体金属占据模型位置，凝固冷却后形成铸件的新型铸造方法。
消失模铸造过程中，会产生挥发性的有机废气，含有苯类化合物，该有机废气若不加处理，直接排入大气会对环境造成严重污染，危害人类健康。
 技术问题
针对上述问题，本发明提供了一种用于消失模铸造的有机废气吸附脱附净化装置，从而有效解决了背景技术中指出的问题。
 技术解决方案
本发明采用的技术方案是：一种用于消失模铸造的有机废气吸附脱附净化装置，包括吸附系统和脱附系统，所述的吸附系统包括前后依次相连的缓冲罐、预处理装置、吸附装置、吸附风机和烟囱，所述的吸附装置包括第一吸附床和第二吸附床，所述吸附系统在第一吸附床和第二吸附床的前端分别设有第一前吸附阀门和第二前吸附阀门，后端分别设有第一后吸附阀门和第二后吸附阀门，所述的脱附系统包括前后依次相连的脱附风机、催化燃烧炉、换热器和加热器，所述脱附风机的进风口与第一吸附床和第二吸附床的前端相连，所述加热器的出风口与第一吸附床和第二吸附床的后端相连，所述脱附系统在第一吸附床和第二吸附床的前端分别设有第一前脱附阀门和第二前脱附阀门，后端分别设有第一后脱附阀门和第二后脱附阀门。
采用第一吸附床和第二吸附床的双吸附床设计，在任意一个吸附床吸附饱和进行脱附操作时，另一个吸附床能够进行吸附，从而保证吸附的连续性，避免脱附造成吸附的暂停。
作为优选，所述的预处理装置为粗过滤装置。
粗过滤装置能够对有机废气中的大颗粒杂质进行过滤，防止其进入吸附装置，延长吸附装置的使用寿命。
作为优选，所述的第一吸附床和第二吸附床为活性炭吸附装置。
活性炭吸附装置能够去掉有机废气中的VOC物质，最终达到排放标准。
作为优选，所述换热器的废气出口与烟囱相连，所述换热器的新鲜空气出口与加热器相连。
通过换热器将催化燃烧炉燃烧产生的废气中的热量转移到新鲜空气中进行回收利用，不仅降低了热量的排放，而且降低了加热器的加热功率。
 有益效果
本发明采用吸附系统对有机废气中的有机污染物进行吸附，当吸附饱和后，可通过脱附系统进行脱附，产生的高浓度有机污染物通过催化燃烧炉进行燃烧，最终分解得到二氧化碳和水蒸气进行排放。
 附图说明
图1为本发明的结构示意图。
 本发明的最佳实施方式
下面通过具体的实施例结合附图对本发明做进一步的详细描述。
实施例1：如图1所示，一种用于消失模铸造的有机废气吸附脱附净化装置，包括吸附系统和脱附系统，所述的吸附系统包括前后依次相连的缓冲罐1、预处理装置2、吸附装置3、吸附风机4和烟囱5，所述的吸附装置包括第一吸附床31和第二吸附床32，所述吸附系统在第一吸附床31和第二吸附床32的前端分别设有第一前吸附阀门6和第二前吸附阀门7，后端分别设有第一后吸附阀门8和第二后吸附阀门9，所述的脱附系统包括前后依次相连的脱附风机10、催化燃烧炉11、换热器12和加热器13，所述脱附风机10的进风口与第一吸附床31和第二吸附床32的前端相连，所述加热器13的出风口与第一吸附床31和第二吸附床32的后端相连，所述脱附系统在第一吸附床31和第二吸附床32的前端分别设有第一前脱附阀门14和第二前脱附阀门15，后端分别设有第一后脱附阀门16和第二后脱附阀门17。
所述的预处理装置为粗过滤装置。
所述的第一吸附床31和第二吸附床32为活性炭吸附装置。
所述换热器12的废气出口与烟囱5相连，所述换热器12的新鲜空气出口与加热器13相连。
本发明的工作原理：初始状态下，第一吸附床31和第二吸附床32均为非饱和状态。
在进行吸附时，有机废气先通过缓冲罐1得到平稳的气流，再经过预处理装置2将有机废气中的大颗粒杂质去除，最后通过吸附装置3将有机废气中的有机污染物去除，从烟囱5排入大气。
吸附脱附原理：首先采用第一吸附床31进行吸附：打开第一前吸附阀门6和第一后吸附阀门8，关闭第二前吸附阀门7和第二后吸附阀门9，关闭第一前脱附阀门14、第二前脱附阀门15、第一后脱附阀门16和第二后脱附阀门17，然后启动吸附风机4即可进行吸附工作，当第一吸附床31吸附至饱和时，打开第二前吸附阀门7和第二后吸附阀门9，关闭第一前吸附阀门6和第一后吸附阀门8，这样就停止了第一吸附床31的吸附，启动了第二吸附床32进行吸附，然后对第一吸附床31进行脱附，具体操作如下：打开第一前脱附阀门14和第一后脱附阀门16，启动脱附风机10、加热器13和催化燃烧炉11，第一吸附床31吸附的有机污染物在热气的作用下产生高浓度的有机废气，该有机废气进入催化燃烧炉11进行燃烧，在催化剂的作用下燃烧后的有机废气最终被分解成高温的二氧化碳和水蒸气，二氧化碳和水蒸气经过换热器12后从烟囱5排出，外界的新鲜空气经过换热器12后得到了升温，再经过加热器13后变成能够进行脱附的高温空气，进入第一吸附床31进行脱附，从而使得第一吸附床31再生，待脱附完成后，关闭第一前脱附阀门14、第一后脱附阀门16、脱附风机10、加热器13和催化燃烧炉11，等待下一次吸附操作。
待第二吸附床32吸附至饱和时，打开第一前吸附阀门6和第一后吸附阀门8，关闭第二前吸附阀门7和第二后吸附阀门9，进行第一吸附床31的吸附，然后对第一吸附床31进行脱附，具体操作如下：打开第二前脱附阀门15和第二后脱附阀门17，启动脱附风机10、加热器13和催化燃烧炉11，第二吸附床32吸附的有机污染物在热气的作用下产生高浓度的有机废气，该有机废气进入催化燃烧炉11进行燃烧，在催化剂的作用下燃烧后的有机废气最终被分解成高温的二氧化碳和水蒸气，二氧化碳和水蒸气经过换热器12后从烟囱5排出，外界的新鲜空气经过换热器12后得到了升温，再经过加热器13后变成能够进行脱附的高温空气，进入第二吸附床32进行脱附，从而使得第二吸附床32再生，待脱附完成后，关闭第二前脱附阀门15、第二后脱附阀门17、脱附风机10、加热器13和催化燃烧炉11，等待下一次吸附操作。
最后，需要注意的是，以上列举的仅是本发明的具体实施方式。显然，本发明不限于以上实施方式，还可以有很多变形。本领域的普通技术人员能从本发明公开的内容中直接导出或联想到的所有变形，均应认为是本发明的保护范围。

Claims (4)

  1. 一种用于消失模铸造的有机废气吸附脱附净化装置，其特征在于，包括吸附系统和脱附系统，所述的吸附系统包括前后依次相连的缓冲罐（1）、预处理装置（2）、吸附装置（3）、吸附风机（4）和烟囱（5），所述的吸附装置包括第一吸附床（31）和第二吸附床（32），所述吸附系统在第一吸附床（31）和第二吸附床（32）的前端分别设有第一前吸附阀门（6）和第二前吸附阀门（7），后端分别设有第一后吸附阀门（8）和第二后吸附阀门（9），所述的脱附系统包括前后依次相连的脱附风机（10）、催化燃烧炉（11）、换热器（12）和加热器（13），所述脱附风机（10）的进风口与第一吸附床（31）和第二吸附床（32）的前端相连，所述加热器（13）的出风口与第一吸附床（31）和第二吸附床（32）的后端相连，所述脱附系统在第一吸附床（31）和第二吸附床（32）的前端分别设有第一前脱附阀门（14）和第二前脱附阀门（15），后端分别设有第一后脱附阀门（16）和第二后脱附阀门（17）。
  2. 根据权利要求1所述的一种用于消失模铸造的有机废气吸附脱附净化装置，其特征在于，所述的预处理装置为粗过滤装置。
  3. 根据权利要求1所述的一种用于消失模铸造的有机废气吸附脱附净化装置，其特征在于，所述的第一吸附床（31）和第二吸附床（32）为活性炭吸附装置。
  4. 根据权利要求1所述的一种用于消失模铸造的有机废气吸附脱附净化装置，其特征在于，所述换热器（12）的废气出口与烟囱（5）相连，所述换热器（12）的新鲜空气出口与加热器（13）相连。
PCT/CN2020/091138 2020-05-13 2020-05-20 一种用于消失模铸造的有机废气吸附脱附净化装置 WO2021227095A1 (zh)

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