CN107420883A - A kind of carbon industry exhausted air quantity and pollutant become Zero discharging system and method - Google Patents
A kind of carbon industry exhausted air quantity and pollutant become Zero discharging system and method Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 50
- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 28
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000007599 discharging Methods 0.000 title claims abstract 4
- 239000007789 gas Substances 0.000 claims abstract description 257
- 238000000746 purification Methods 0.000 claims abstract description 154
- 239000002912 waste gas Substances 0.000 claims abstract description 108
- 238000004898 kneading Methods 0.000 claims abstract description 45
- 238000001354 calcination Methods 0.000 claims abstract description 9
- 238000002485 combustion reaction Methods 0.000 claims abstract description 7
- 239000003245 coal Substances 0.000 claims abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 46
- 229910052760 oxygen Inorganic materials 0.000 claims description 46
- 239000001301 oxygen Substances 0.000 claims description 46
- 238000002156 mixing Methods 0.000 claims description 26
- 239000000428 dust Substances 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 238000006477 desulfuration reaction Methods 0.000 claims description 10
- 230000023556 desulfurization Effects 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 230000001925 catabolic effect Effects 0.000 abstract 1
- 108090000623 proteins and genes Proteins 0.000 abstract 1
- 239000003570 air Substances 0.000 description 46
- 239000010426 asphalt Substances 0.000 description 17
- 239000003517 fume Substances 0.000 description 14
- 239000002918 waste heat Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 239000011269 tar Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 230000001186 cumulative effect Effects 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- FMMWHPNWAFZXNH-UHFFFAOYSA-N Benz[a]pyrene Chemical compound C1=C2C3=CC=CC=C3C=C(C=C3)C2=C2C3=CC=CC2=C1 FMMWHPNWAFZXNH-UHFFFAOYSA-N 0.000 description 2
- -1 NO x Substances 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 231100000357 carcinogen Toxicity 0.000 description 2
- 239000003183 carcinogenic agent Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000011294 coal tar pitch Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B80/00—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel
- F23B80/02—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel by means for returning flue gases to the combustion chamber or to the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/20—Sulfur; Compounds thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
- F23L2900/15043—Preheating combustion air by heat recovery means located in the chimney, e.g. for home heating devices
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
Description
技术领域technical field
本发明涉及大气污染物控制技术领域，尤其涉及一种碳素行业废气量及污染物趋零排放系统与方法。The invention relates to the technical field of atmospheric pollutant control, in particular to a carbon industry waste gas volume and pollutant discharge system and method.
背景技术Background technique
碳素行业主要生产原料是煤沥青、石油焦，是一类重污染行业。与其他行业相比，碳素行业排放的废气中不仅含有常规污染物，如SO2、NOx、颗粒物等，而且含有非常规污染物，如沥青烟等，其成分复杂，含有多环芳烃及苯并芘类致癌物质。The main production raw materials of the carbon industry are coal tar pitch and petroleum coke, which is a type of heavy pollution industry. Compared with other industries, the exhaust gas emitted by the carbon industry not only contains conventional pollutants, such as SO 2 , NO x , particulate matter, etc., but also contains unconventional pollutants, such as asphalt smoke, etc., and its composition is complex, including polycyclic aromatic hydrocarbons and Benzopyrene carcinogens.
碳素行业生产工艺主要包括破碎、筛分、研磨、配料、煅烧、混捏和焙烧等，其中沥青熔化、混捏成型、焙烧工序等均会产生沥青烟。目前，沥青烟的治理仍是一个难点，即使沥青烟达标排放，由于废气中污染物的排放总量是废气量和污染物排放浓度的乘积，排放浓度虽然低，但累计废气量大，这些逃逸的沥青烟对环境所造成的累积生态影响仍不容忽视。The production process of the carbon industry mainly includes crushing, screening, grinding, batching, calcination, kneading and roasting, etc. Among them, asphalt melting, kneading molding, and roasting processes will produce asphalt fumes. At present, the treatment of asphalt fume is still a difficult point. Even if the asphalt fume is discharged up to the standard, the total amount of pollutants discharged in the exhaust gas is the product of the exhaust gas volume and the pollutant emission concentration. Although the emission concentration is low, the cumulative exhaust gas volume is large. The cumulative ecological impact of asphalt smoke on the environment cannot be ignored.
常规的碳素行业废气治理思路是：一炉一净化工艺，如煅烧废气多依次采用冷却、脱硫处理，焙烧工序废气多采用冷却、电捕焦及脱硫处理，混捏工序废气采用电捕焦处理。从而导致碳素废气治理设备投资及运行费均较高，且运行维护与管理复杂。因此，降低治理碳素行业废气的成本以及废气排放量问题，刻不容缓。The conventional idea of waste gas treatment in the carbon industry is: one furnace and one purification process. For example, the exhaust gas of calcination is treated by cooling and desulfurization in sequence; the exhaust gas of roasting process is mostly treated by cooling, electric coke capture and desulfurization; As a result, the investment and operating costs of carbon waste gas treatment equipment are high, and the operation, maintenance and management are complicated. Therefore, it is urgent to reduce the cost of waste gas treatment in the carbon industry and the amount of waste gas emissions.
发明内容Contents of the invention
针对现有技术的上述缺陷和问题，本发明的目的在于：提供了一种碳素行业废气量及污染物趋零排放系统与方法，解决了碳素行业废气的治理成本高，同时使废气量及污染物趋零排放的问题。In view of the above-mentioned defects and problems of the prior art, the object of the present invention is to provide a carbon industry waste gas volume and pollutant discharge system and method, which solves the high cost of waste gas treatment in the carbon industry, and at the same time reduces the amount of waste gas. and the problem of zero emission of pollutants.
为了达到上述目的，本发明提供如下技术方案：In order to achieve the above object, the present invention provides the following technical solutions:
一种碳素行业废气量及污染物趋零排放方法，包括：A carbon industry waste gas volume and pollutant discharge method, including:
步骤S101，将碳素废气净化处理系统中的配料废气净化单元取气端废气、混捏废气净化单元取气端废气、煅烧炉废气净化单元取气端废气与焙烧炉废气净化单元取气端废气混合，作为助燃气体；Step S101, mixing the exhaust gas from the gas intake end of the batching exhaust gas purification unit, the exhaust gas from the gas intake end of the kneading exhaust gas purification unit, the exhaust gas from the gas intake end of the calciner exhaust gas purification unit, and the exhaust gas from the gas intake end of the calciner exhaust gas purification unit in the carbon waste gas purification treatment system , as a combustion-supporting gas;
步骤S102，将所述助燃气体混合后，再与预热到一定温度的空气进行混合，混合后的气体共同作为当前助燃气体，混合后当前助燃气体温度和含氧量达到设定最低温度和氧气量区间值时，引入锅炉中；所述最低温度为80℃，含氧量区间值设定在15～21％；Step S102, after mixing the combustion-supporting gas, it is mixed with air preheated to a certain temperature, and the mixed gas is used as the current combustion-supporting gas. After mixing, the temperature and oxygen content of the current combustion-supporting gas reach the set minimum temperature and oxygen When the oxygen content interval value is set, it is introduced into the boiler; the minimum temperature is 80°C, and the oxygen content interval value is set at 15-21%;
为防止高温沥青烟废气与空气或其他其他混合后温度降低造成沥青类粘稠度大的物质冷凝下来，堵塞风机、输送管道及锅炉内其他部位；In order to prevent the high-temperature asphalt fume exhaust gas from mixing with air or other substances, the temperature will drop, resulting in the condensation of asphalt-like viscous substances, which will block the fans, conveying pipes and other parts of the boiler;
优选地，将混捏工序废气、煅烧工序废气、焙烧工序废气直接引入锅炉二次风入口，进入锅炉，温度区间为150-230℃；将配料工序废气单独引入锅炉一次风入口。Preferably, waste gas from the kneading process, calcination process, and roasting process are directly introduced into the secondary air inlet of the boiler and enter the boiler at a temperature range of 150-230°C; the waste gas from the batching process is separately introduced into the primary air inlet of the boiler.
进一步优选地，将混捏废气取自于电捕焦油器后引入锅炉；Further preferably, the kneading waste gas is taken from the electric tar catcher and then introduced into the boiler;
优选地，锅炉风机采用防磨损风机；Preferably, the boiler fan adopts an anti-wear fan;
步骤S103，所述碳素废气净化处理系统中的废气及污染物通过锅炉原有污染物净化系统去除。Step S103, the waste gas and pollutants in the carbon waste gas purification treatment system are removed by the original pollutant purification system of the boiler.
一种碳素行业废气量及污染物趋零排放系统，包括：碳素废气净化处理系统、锅炉，其特征在于：还包括烟道连接系统；所述碳素废气净化处理系统的废气排放端与烟道连接系统的废气进气端连接，所述烟道连接系统的废气排放端与锅炉的助燃气体的进气端连接；所述碳素废气净化处理系统，包括，配料废气净化单元的取气端废气流量采集传感器、混捏废气净化单元的取气端废气流量采集传感器、煅烧炉废气净化单元的取气端废气流量采集传感器、焙烧炉废气净化单元的取气端废气流量采集传感器、配料废气净化单元的取气端废气含氧量采集传感器、混捏废气净化单元的取气端废气含氧量采集传感器、煅烧炉废气净化单元的取气端废气含氧量采集传感器、焙烧炉废气净化单元的取气端废气含氧量采集传感器、增压风机、自动调节阀及助燃气体混合装置；所述烟道连接系统，包括：空气进气端空气流量采集传感器、空气预热控制单元；A carbon industry waste gas volume and pollutant discharge system, comprising: a carbon waste gas purification treatment system, a boiler, characterized in that: it also includes a flue connection system; the waste gas discharge end of the carbon waste gas purification treatment system is connected to the The waste gas inlet end of the flue connection system is connected, and the waste gas discharge end of the flue connection system is connected with the combustion gas inlet end of the boiler; the carbon waste gas purification treatment system includes the gas intake of the batching waste gas purification unit Exhaust gas flow acquisition sensor at the exhaust end, exhaust gas flow acquisition sensor at the gas intake end of the kneading exhaust gas purification unit, exhaust gas flow acquisition sensor at the air intake end of the calciner exhaust gas purification unit, exhaust gas flow acquisition sensor at the air intake end of the exhaust gas purification unit of the roaster, and batching exhaust gas purification The oxygen content acquisition sensor of the exhaust gas at the gas intake end of the unit, the oxygen content acquisition sensor of the exhaust gas at the gas intake end of the kneading exhaust gas purification unit, the oxygen content acquisition sensor of the exhaust gas at the gas intake end of the calciner exhaust gas purification unit, and the acquisition sensor of the exhaust gas purification unit of the roaster Gas end exhaust gas oxygen content acquisition sensor, booster fan, automatic regulating valve and combustion gas mixing device; the flue connection system includes: air intake end air flow acquisition sensor, air preheating control unit;
在所述配料废气净化单元、混捏废气净化单元、煅烧炉废气净化单元与焙烧炉废气净化单元的取气端分别设置配料废气净化单元的取气端废气含氧量采集传感器、混捏废气净化单元的取气端废气含氧量采集传感器、煅烧炉废气净化单元的取气端废气含氧量采集传感器、焙烧炉废气净化单元的取气端废气含氧量采集传感器、配料废气净化单元的取气端废气流量采集传感器、混捏废气净化单元的取气端废气流量采集传感器、煅烧炉废气净化单元的取气端废气流量采集传感器、焙烧炉废气净化单元的取气端废气流量采集传感器、所述增压风机及所述自动调节阀；所述空气的进气端设置空气进气端空气流量采集传感器；At the gas intake ends of the batching waste gas purification unit, the kneading waste gas purification unit, the calciner waste gas purification unit, and the roaster waste gas purification unit, the waste gas oxygen content acquisition sensor at the gas intake end of the batching waste gas purification unit and the kneading waste gas purification unit are respectively arranged. Acquisition sensor for oxygen content of exhaust gas at the gas intake end, acquisition sensor for oxygen content of exhaust gas at the intake end of the exhaust gas purification unit of the calciner, acquisition sensor for oxygen content of the exhaust gas at the exhaust gas purification unit of the roaster furnace, and air intake end of the exhaust gas purification unit of the batching furnace Exhaust gas flow acquisition sensor, exhaust gas flow acquisition sensor at the gas intake end of the kneading exhaust gas purification unit, exhaust gas flow acquisition sensor at the air intake end of the calciner exhaust gas purification unit, exhaust gas flow acquisition sensor at the air intake end of the roaster exhaust gas purification unit, the booster A blower fan and the automatic regulating valve; the air intake end is provided with an air flow acquisition sensor at the air intake end;
在所述烟道连接系统上设置空气补偿单元，在所述空气补偿单元上设置空气进气端空气流量采集传感器，所述空气补偿单元的进气端通入空气，所述空气补偿单元的排气端与烟道连接系统的进气端连接；An air compensation unit is set on the flue connection system, an air flow collection sensor at the air intake end is set on the air compensation unit, the air intake end of the air compensation unit is fed into air, and the exhaust of the air compensation unit is The gas end is connected to the intake end of the flue connection system;
所述配料废气净化单元的取气端废气含氧量采集传感器、混捏废气净化单元的取气端废气含氧量采集传感器、煅烧炉废气净化单元的取气端废气含氧量采集传感器、焙烧炉废气净化单元的取气端废气含氧量采集传感器分别对配料废气净化单元的取气端废气含氧量、混捏废气净化单元的取气端废气含氧量、煅烧炉废气净化单元的取气端废气含氧量、焙烧炉废气净化单元的取气端废气含氧量进行采集；所述配料废气净化单元取气端废气流量采集传感器、混捏废气净化单元的取气端废气流量采集传感器、煅烧炉废气净化单元的取气端废气流量采集传感器与焙烧炉废气净化单元的取气端废气流量采集传感器分别对配料废气净化单元取气端废气流量、混捏废气净化单元的取气端废气流量、煅烧炉废气净化单元的取气端废气流量与焙烧炉废气净化单元的取气端废气流量进行采集；所述空气进气端空气流量采集传感器对空气进气端空气流量进行采集；所述空气预热控制单元对所述空气进气端空气进行加热到所述最低温度；配料废气净化单元、混捏废气净化单元、煅烧炉废气净化单元焙烧炉废气净化单元采集后的各管路取气端废气混合后的含氧量通过调整所述自动调节阀与增压风机参数进行调节，通过调节混合前各管路所述废气流量使得各管路废气混合后的温度达到废气混合后的最低温度设定氧气区间值，所述各管路废气需要保温；The exhaust gas oxygen content acquisition sensor at the gas intake end of the ingredient exhaust gas purification unit, the exhaust gas oxygen content acquisition sensor at the air intake end of the kneading exhaust gas purification unit, the exhaust gas oxygen content acquisition sensor at the gas intake end of the calciner exhaust gas purification unit, and the roaster The exhaust gas oxygen content acquisition sensor at the gas intake end of the exhaust gas purification unit respectively measures the oxygen content of the exhaust gas at the gas intake end of the batching exhaust gas purification unit, the oxygen content of the exhaust gas at the gas intake end of the kneading exhaust gas purification unit, and the gas intake end of the calciner exhaust gas purification unit. The oxygen content of the exhaust gas and the oxygen content of the exhaust gas at the gas intake end of the exhaust gas purification unit of the roaster are collected; The exhaust gas flow acquisition sensor at the gas intake end of the exhaust gas purification unit and the exhaust gas flow acquisition sensor at the air intake end of the roaster exhaust gas purification unit respectively measure the exhaust gas flow at the gas intake end of the batching exhaust gas purification unit, the exhaust gas flow at the gas intake end of the kneading exhaust gas purification unit, and the calciner The exhaust gas flow at the gas intake end of the exhaust gas purification unit and the exhaust gas flow at the air intake end of the roaster exhaust gas purification unit are collected; the air flow acquisition sensor at the air intake end collects the air flow at the air intake end; the air preheating control The unit heats the air at the air inlet end to the minimum temperature; the batching waste gas purification unit, the kneading waste gas purification unit, the calciner waste gas purification unit, the calciner waste gas purification unit, and the waste gas from the air intake end of each pipeline after being collected by the calciner waste gas purification unit are mixed. The oxygen content is adjusted by adjusting the parameters of the automatic regulating valve and the booster fan, and by adjusting the exhaust gas flow rate of each pipeline before mixing, the temperature of the exhaust gas in each pipeline after mixing reaches the minimum temperature after the exhaust gas is mixed to set the oxygen interval value , the exhaust gas of each pipeline needs to be kept warm;
在所述烟道连接系统的进气端之前设置所述的助燃气体混合装置，将所述碳素废气净化处理系统中的配料废气净化单元的取气端、混捏废气净化单元的取气端、煅烧炉废气净化单元的取气端、焙烧炉废气净化单元的取气端与所述助燃气体混合装置的输入端分别通过气体管路连接，各段管路上增设所述自动调节阀与所述增压风机；所述助燃气体混合装置的输出端与所述烟道连接系统的进气端连通，所述烟道连接系统的排放端与锅炉的助燃气体进气端连接；助燃气体排放端与锅炉进气端连通，将所述助燃气体输入锅炉的炉膛中，进行充分燃烧；The combustion-supporting gas mixing device is arranged before the inlet end of the flue connection system, and the gas intake end of the ingredient exhaust gas purification unit in the carbon waste gas purification treatment system, the gas intake end of the kneading exhaust gas purification unit, The gas intake end of the calciner exhaust gas purification unit, the gas intake end of the roaster exhaust gas purification unit and the input end of the combustion-supporting gas mixing device are respectively connected through gas pipelines, and the automatic regulating valve and the increasing Compressor; the output end of the combustion-supporting gas mixing device communicates with the intake end of the flue connection system, and the discharge end of the flue connection system is connected to the combustion-supporting gas intake end of the boiler; the combustion-supporting gas discharge end is connected to the boiler The intake end is connected, and the combustion-supporting gas is input into the furnace of the boiler for full combustion;
若配料废气净化单元部分的取气端废气、混捏废气净化单元部分的取气端废气、煅烧炉废气净化单元部分的取气端废气、焙烧炉废气净化单元部分的取气端废气混合后达到最低温度，再引入预热到一定温度的空气，与空气混合后，达到设定氧气区间值，则将混合后的配料废气净化单元、混捏废气净化单元、煅烧炉废气净化单元、焙烧炉废气净化单元的部分取气端废气，再与预热后的空气进行混合，共同作为助燃气体。If the exhaust gas at the gas intake end of the batching exhaust gas purification unit, the exhaust gas at the gas intake end of the kneading exhaust gas purification unit, the exhaust gas at the gas intake end of the calciner exhaust gas purification unit, and the exhaust gas at the gas intake end of the roaster exhaust gas purification unit reach the minimum after mixing temperature, and then introduce air preheated to a certain temperature, and after mixing with the air, the set oxygen interval value is reached, then the mixed ingredients exhaust gas purification unit, kneading exhaust gas purification unit, calciner exhaust gas purification unit, roaster exhaust gas purification unit Part of the exhaust gas is taken from the gas end, and then mixed with the preheated air to be used as a combustion-supporting gas.
进一步地，一种碳素行业废气量及污染物趋零排放系统，还包括：锅炉废气净化系统；所述锅炉废气净化系统，包括，除尘装置、脱硫装置及低温省煤器；所述低温省煤器设置在除尘装置前，使得污染物废气进入除尘装置时，保证正常工作温度；所述脱硫装置设置在除尘装置后，处理锅炉燃烧后的污染物废气。Further, a carbon industry waste gas volume and pollutant discharge system also includes: a boiler waste gas purification system; the boiler waste gas purification system includes a dust removal device, a desulfurization device and a low-temperature economizer; the low-temperature economizer The coal burner is arranged in front of the dust removal device, so that when the pollutant waste gas enters the dust removal device, the normal working temperature is guaranteed; the desulfurization device is arranged behind the dust removal device to treat the pollutant waste gas after the boiler is burned.
本发明的有益效果为：The beneficial effects of the present invention are:
1、为切实改善京津冀及周边地区环境空气质量，碳素企业被要求生产调控，不仅要求废气污染物达到特别排放限值，而且要求限产50％以上。通过本发明将碳素废气部分代替锅炉燃烧用空气，实现碳素废气趋零排放，起到与削减碳素行业产能异曲同工的效果；1. In order to effectively improve the ambient air quality in Beijing, Tianjin, Hebei and surrounding areas, carbon companies are required to regulate production, not only requiring exhaust pollutants to reach special emission limits, but also requiring a production limit of more than 50%. Through the present invention, the carbon waste gas is partially replaced with the combustion air of the boiler, so that the carbon waste gas tends to zero emission, which has the same effect as reducing the production capacity of the carbon industry;
2、通过电厂锅炉或工业锅炉现有的除尘脱硫脱硝设施即可脱除碳素废气中的二氧化硫、NOx、颗粒物，解决了碳素企业“一炉一污染控制工艺”、环保设备多而分散的运行维护与管理难题，大幅降低碳素企业环保运行成本；2. The existing dust removal, desulfurization and denitrification facilities of power plant boilers or industrial boilers can remove sulfur dioxide, NOx, and particulate matter in carbon waste gas, which solves the problem of "one furnace, one pollution control process" and many and scattered environmental protection equipment in carbon enterprises Difficulties in operation, maintenance and management, greatly reducing the environmental protection operation cost of carbon enterprises;
3、通过一氧化碳、沥青烟在锅炉内燃烧，可解决碳素行业长期存在的一氧化碳、沥青烟治理难题，可彻底消除碳素行业废气中排放的一些致癌物(如苯并芘等)对人体健康的累积影响；3. Through the combustion of carbon monoxide and asphalt fume in the boiler, it can solve the long-standing problem of carbon monoxide and asphalt fume treatment in the carbon industry, and can completely eliminate some carcinogens (such as benzopyrene, etc.) emitted in the waste gas of the carbon industry that are harmful to human health the cumulative impact of
4、通过回收废气热能、一氧化碳、含炭颗粒物及沥青烟的化学能，实现了能量的综合回收利用，降低锅炉煤耗，实现节能减排的高度统一。4. By recovering the heat energy of exhaust gas, carbon monoxide, carbon-containing particles and chemical energy of asphalt fume, the comprehensive recovery and utilization of energy is realized, the coal consumption of boilers is reduced, and a high degree of unity of energy saving and emission reduction is realized.
附图说明Description of drawings
图1为目前碳素行业废气处理系统流程示意图。Figure 1 is a schematic diagram of the current waste gas treatment system in the carbon industry.
图2为本发明一种碳素行业废气量及污染物趋零排放系统示意图。Fig. 2 is a schematic diagram of a carbon industry waste gas volume and pollutant discharge system of the present invention.
附图标记：Reference signs:
图1：Ⅰ、配料废气净化单元，Ⅱ、煅烧炉废气净化单元，Ⅲ、混捏废气净化单元，Ⅳ、焙烧炉废气净化单元，Ⅴ、煤气发生单元Figure 1: Ⅰ. Batching exhaust gas purification unit, Ⅱ. Calciner exhaust gas purification unit, Ⅲ. Kneading kneading exhaust gas purification unit, Ⅳ. Roasting furnace exhaust gas purification unit, Ⅴ, Coal gas generation unit
图2：Ⅰ、配料废气净化单元，Ⅱ、混捏废气净化单元，Ⅲ、煅烧炉废气净化单元，Ⅳ、焙烧炉废气净化单元、Ⅴ、锅炉及其废气净化系统Figure 2: Ⅰ. Batching exhaust gas purification unit, Ⅱ, kneading exhaust gas purification unit, Ⅲ, calciner exhaust gas purification unit, Ⅳ, roaster exhaust gas purification unit, Ⅴ, boiler and its exhaust gas purification system
下面结合附图与具体实施方式对本发明作进一步描述。The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
具体实施方式detailed description
图1为目前碳素行业废气处理系统流程示意图。碳素行业废气净化单元主要包括配料废气净化单元Ⅰ、煅烧炉废气净化单元Ⅱ、混捏废气净化单元Ⅲ、焙烧炉废气净化单元Ⅳ，各工序的废气均单独净化处理。所述的配料废气净化单元Ⅰ包括除尘器1、引风机2与烟囱3，所述的煅烧炉废气净化单元Ⅱ包括煅烧炉4、余热回收设备5、冷却塔6、脱硫设备7、引风机8与烟囱9，所述的混捏废气净化单元Ⅲ包括电捕焦油器10、引风机11和烟囱12，所述的焙烧炉废气净化单元Ⅳ包括鼓风机13、焙烧炉14、余热回收设备15、冷却塔16、电捕焦油器17、脱硫设备18、引风机19与烟囱20，所述的煤气发生单元Ⅴ包括鼓风机21、煤气发生炉22。Figure 1 is a schematic diagram of the current waste gas treatment system in the carbon industry. The carbon industry exhaust gas purification unit mainly includes batching exhaust gas purification unit I, calciner exhaust gas purification unit II, kneading exhaust gas purification unit III, and roaster exhaust gas purification unit IV. The exhaust gas of each process is purified separately. The batching exhaust gas purification unit I includes a dust collector 1, an induced draft fan 2 and a chimney 3, and the calciner exhaust gas purification unit II includes a calciner 4, waste heat recovery equipment 5, cooling tower 6, desulfurization equipment 7, and an induced draft fan 8 With the chimney 9, the kneading exhaust gas purification unit III includes an electric tar catcher 10, an induced draft fan 11 and a chimney 12, and the roaster exhaust gas purification unit IV includes a blower 13, a roaster 14, waste heat recovery equipment 15, a cooling tower 16. Electric tar catcher 17, desulfurization equipment 18, induced draft fan 19 and chimney 20, the gas generating unit V includes a blower 21 and a gas generator 22.
图2为本发明一种碳素行业废气量及污染物趋零排放系统示意图。一种碳素行业废气量及污染物趋零排放系统主要包括配料废气净化单元Ⅰ、混捏废气净化单元Ⅱ、煅烧炉废气净化单元Ⅲ、焙烧炉废气净化单元Ⅳ；还包括，烟道连接系统。所述配料废气净化单元Ⅰ、混捏废气净化单元Ⅱ、煅烧炉废气净化单元Ⅲ、焙烧炉废气净化单元Ⅳ分别开设取气端A、取气端B、取气端C、取气端D；所述的取气端(A-D)分别设置于所述配料废气净化单元Ⅰ除尘器1后和/或设置于混捏废气净化单元Ⅱ电捕焦油器4前和/或分别设置于所述煅烧炉废气净化单元Ⅲ、焙烧炉废气净化单元Ⅳ的余热回收设备(8、15)后。所述烟道连接系统设置空气进气端E、所述配料废气净化单元Ⅰ、混捏废气净化单元Ⅱ、煅烧炉废气净化单元Ⅲ、焙烧炉废气净化单元Ⅳ的取气端(A-D)的废气分别汇入助燃气体混合装置21。所述的配料废气净化单元Ⅰ、混捏废气净化单元Ⅱ、煅烧炉废气净化单元Ⅲ、焙烧炉废气净化单元Ⅳ取气端(A-D)与所述助燃气体混合控制单元进气端F之间连接的管路是④、③、①、②；所述烟道连接系统连接的管路是⑤。Fig. 2 is a schematic diagram of a carbon industry waste gas volume and pollutant discharge system of the present invention. A carbon industry exhaust gas volume and pollutant emission system mainly includes batching exhaust gas purification unit I, kneading exhaust gas purification unit II, calciner exhaust gas purification unit III, roaster exhaust gas purification unit IV; also includes a flue connection system. The batching exhaust gas purification unit I, the kneading exhaust gas purification unit II, the calciner exhaust gas purification unit III, and the roaster exhaust gas purification unit IV are respectively provided with gas intake end A, air intake end B, air intake end C, and air intake end D; The gas intake ports (A-D) mentioned above are respectively arranged behind the dust collector 1 of the batching exhaust gas purification unit I and/or before the electric tar catcher 4 of the kneading exhaust gas purification unit II and/or respectively arranged at the exhaust gas purification of the calciner After the waste heat recovery equipment (8, 15) of unit III and roaster exhaust gas purification unit IV. The flue connection system is provided with the air intake end E, the waste gas from the gas intake ends (A-D) of the batching waste gas purification unit I, the kneading waste gas purification unit II, the calciner waste gas purification unit III, and the roaster waste gas purification unit IV respectively. Into the combustion-supporting gas mixing device 21. The gas intake ports (A-D) of the batching exhaust gas purification unit I, the kneading exhaust gas purification unit II, the calciner exhaust gas purification unit III, and the roaster exhaust gas purification unit IV are connected to the intake port F of the combustion-supporting gas mixing control unit The pipelines are ④, ③, ①, ②; the pipeline connected by the flue connection system is ⑤.
特别说明的是：管路①煅烧炉经余热设备利用后，梯度利用于锅炉作为助燃气体，管路②焙烧炉气体经余热设备利用后，梯度利用于锅炉作为助燃气体。由于煅烧炉和焙烧炉产生的废气中包含致癌物质-沥青烟，沥青烟容易粘附在风机或管道内，需对产生沥青烟的工艺气体，梯度利用的运输管路①、②有温度要求。In particular, after the pipeline ① calciner is used by the waste heat equipment, the gradient is used in the boiler as a combustion-supporting gas; after the pipeline ② roaster gas is utilized by the waste heat equipment, the gradient is used in the boiler as a combustion-supporting gas. Since the waste gas produced by calciner and roaster contains carcinogen-pitch fume, which is easy to adhere to the fan or pipeline, it is necessary to have temperature requirements for the process gas that produces asphalt fume, and the transportation pipelines ① and ② for gradient utilization.
具体原因如下：a.废气温度不低于沥青烟冷凝温度，不高于沥青烟易燃易爆温度，这里优选的是温度在150-230℃，b.管道要求保温，这样不至于输送沥青烟的管道气温降低到沥青烟冷凝温度而发生冷凝，没有将沥青烟以气体雾化状态输送至工艺内或工艺外直接燃烧利用，热值利用效果较好。其废气温度，可通过调节控制余热回收设备参数获得。The specific reasons are as follows: a. The temperature of the exhaust gas should not be lower than the condensation temperature of asphalt fume, and should not be higher than the flammable and explosive temperature of asphalt fume. The preferred temperature here is 150-230°C. b. The pipeline requires insulation so as not to transport asphalt fume The air temperature in the pipeline is lowered to the condensation temperature of the asphalt fume to condense, and the asphalt fume is not transported to the process or outside the process in a gas atomized state for direct combustion and utilization, and the heat value utilization effect is better. The exhaust gas temperature can be obtained by adjusting and controlling the parameters of waste heat recovery equipment.
该系统还包括，锅炉及其锅炉废气净化系统Ⅴ；所述锅炉包括，锅炉22；所述锅炉废气净化系统Ⅴ包括，除尘装置除尘器24、脱硫装置脱硫设备26，还包括，低温省煤器23、引风机25、烟囱27。The system also includes a boiler and its boiler exhaust gas purification system V; the boiler includes a boiler 22; the boiler exhaust gas purification system V includes a dust collector dust collector 24, a desulfurization device desulfurization device 26, and a low-temperature economizer 23, induced draft fan 25, chimney 27.
该系统还包括控制装置，所述的控制装置包括多个自动调节阀、增压风机(用于将①②③④路管路中废气引入锅炉)、流量传感器，其中部分所述多个自动调节阀、增压风机、流量传感器的采集端分别设置在配料废气净化单元Ⅰ、混捏废气净化单元Ⅱ、煅烧炉废气净化单元Ⅲ、焙烧炉废气净化单元Ⅳ的取气端(A-D)与助燃气体混合装置21进气端之间连接的管道上和/或设置在所述空气进气端E连接的管道上；通过多个流量传感器在线监测废气流量数据，传递给控制装置，控制多个自动调节阀与多个增压风机；将配料、煅烧、焙烧与混捏工序的废气混合后，再与空气混合，作为当前助燃气体，助燃气体流量通过调整所述增压风机参数及所述自动调节阀参数进行调节，通过调节混合前各管路所述助燃气体流量来调整各管路废气混合后的温度，使得各管路废气混合后的温度达到最低温度和达到设定氧气区间值，所述各管路废气需要保温，将当前助燃气体引入锅炉，实现碳素行业的废气助燃用于锅炉，达到废气排放量趋零的效果。The system also includes a control device. The control device includes a plurality of automatic regulating valves, a booster fan (used to introduce the waste gas in the pipeline ①②③④ into the boiler), and a flow sensor. The collection ends of the compressor and the flow sensor are respectively set at the gas intake ends (A-D) of the batching waste gas purification unit I, the kneading waste gas purification unit II, the calciner waste gas purification unit III, and the roaster waste gas purification unit IV and the combustion gas mixing device 21. On the pipeline connected between the gas ends and/or on the pipeline connected to the air intake end E; the exhaust gas flow data is monitored online through multiple flow sensors, and transmitted to the control device to control multiple automatic regulating valves and multiple Booster fan; mix the waste gas from batching, calcination, roasting and kneading process, and then mix it with air as the current combustion-supporting gas. The flow rate of the combustion-supporting gas is adjusted by adjusting the parameters of the booster fan and the automatic regulating valve. Adjust the combustion-supporting gas flow rate of each pipeline before mixing to adjust the temperature of the exhaust gas in each pipeline after mixing, so that the temperature of the exhaust gas in each pipeline after mixing reaches the minimum temperature and reaches the set oxygen interval value. The exhaust gas in each pipeline needs to be kept warm , introduce the current combustion-supporting gas into the boiler, realize the combustion-supporting waste gas of the carbon industry for the boiler, and achieve the effect of zero exhaust gas emissions.
实施例1：Example 1:
年产6万吨铝用碳素阳极制品厂，煅烧工序产生废气约6000Nm3/h，混捏废气约1100Nm3/h，配料废气约17000Nm3/h，焙烧炉废气约22000Nm3/h。采用本发明系统，可将以上工序废气全部用于某35t/h工业锅炉作为助燃空气。与原废气净化系统相比，总体上，本发明可减排废气量约46100Nm3/h，SO2减排约15t/年，NOx可减排约2t/年，沥青烟可减排约1.5t/年，烟/粉尘可减排约7.5t/年，节约7t标煤/年。Carbon anode product factory with an annual output of 60,000 tons of aluminum. The waste gas generated in the calcination process is about 6000Nm 3 /h, the waste gas of kneading is about 1100Nm 3 /h, the waste gas of batching is about 17000Nm 3 /h, and the waste gas of roasting furnace is about 22000Nm 3 /h. By adopting the system of the present invention, all the waste gas from the above processes can be used in a certain 35t/h industrial boiler as combustion air. Compared with the original exhaust gas purification system, on the whole, the present invention can reduce exhaust gas emission by about 46100Nm 3 /h, SO 2 emission by about 15t/year, NOx emission by about 2t/year, asphalt smoke by about 1.5 t/year, smoke/dust emission can be reduced by about 7.5t/year, saving 7t standard coal/year.
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.
Claims (3)
- The Zero emission method 1. a kind of carbon industry exhausted air quantity and pollutant become, including：Step S101, dispensing exhaust purification unit gas-taking end waste gas, the kneading waste gas in carbon exhaust gas purifying treatment system is net Change unit gas-taking end waste gas, calciner emission clean unit gas-taking end waste gas and roaster exhaust purification unit gas-taking end waste gas to mix Close, as combustion-supporting gas；Step S102, after the combustion-supporting gas is mixed, then the air with being preheating to certain temperature is mixed, mixed gas Body is collectively as current combustion-supporting gas, and current combustion-supporting gas temperature and oxygen content reach setting minimum temperature and amount of oxygen after mixing During interval value, it is introduced into boiler；The minimum temperature is 80 DEG C, and oxygen content interval value is set in 15~21%；Step S103, waste gas and pollutant in the carbon exhaust gas purifying treatment system pass through the original pollutant purification system of boiler System removes.
- The Zero discharging system 2. a kind of carbon industry exhausted air quantity and pollutant become, including：Carbon exhaust gas purifying treatment system, boiler, It is characterized in that：Also include flue connection system；The waste gas discharge end of the carbon exhaust gas purifying treatment system is connected with flue The inlet end of the gas inlet end connection of system, the waste gas discharge end of the flue connection system and the combustion-supporting gas of boiler connects Connect；The carbon exhaust gas purifying treatment system, including, the gas-taking end exhaust gas flow collection sensor of dispensing exhaust purification unit, Gas-taking end exhaust gas flow collection sensor, the gas-taking end exhaust gas flow of calciner emission clean unit of kneading exhaust purification unit Collection sensor, gas-taking end exhaust gas flow collection sensor, the dispensing exhaust purification unit of roaster exhaust purification unit take Gas-taking end waste gas oxygen content collection sensor, the calcining furnace of gas end waste gas oxygen content collection sensor, kneading exhaust purification unit The gas-taking end waste gas oxygen content collection sensor of exhaust purification unit, the gas-taking end waste gas oxygen content of roaster exhaust purification unit Gather sensor, booster fan, automatic regulating valve and combustion-supporting gas mixing arrangement；The flue connects system, including：Air enters Gas end air mass flow collection sensor, air preheat control unit；It is net in the dispensing exhaust purification unit, kneading exhaust purification unit, calciner emission clean unit and roasting furnace exhaust The gas-taking end for changing unit sets gas-taking end waste gas oxygen content collection sensor, the kneading waste gas of dispensing exhaust purification unit net respectively The gas-taking end waste gas oxygen content collection for changing the gas-taking end waste gas oxygen content collection sensor, calciner emission clean unit of unit passes Gas-taking end waste gas oxygen content collection sensor, the gas-taking end of dispensing exhaust purification unit of sensor, roaster exhaust purification unit Exhaust gas flow collection sensor, the gas-taking end exhaust gas flow collection sensor of kneading exhaust purification unit, calciner emission purification The gas-taking end exhaust gas flow of unit gathers sensor, the gas-taking end exhaust gas flow of roaster exhaust purification unit gathers sensor, The booster fan and the automatic regulating valve；The inlet end of the air sets air inlet end air mass flow collection sensing Device；Compensated with air unit is set in the flue connection system, sets air inlet end empty on the compensated with air unit Throughput gathers sensor, and the inlet end of the compensated with air unit is passed through air, the exhaust end of the compensated with air unit with The inlet end connection of flue connection system；Gas-taking end waste gas oxygen content collection sensor, the gas-taking end of kneading exhaust purification unit of the dispensing exhaust purification unit Waste gas oxygen content collection sensor, gas-taking end waste gas oxygen content collection sensor, the roaster of calciner emission clean unit give up The gas-taking end waste gas oxygen content collection sensor of gas clean unit is oxygen-containing to the gas-taking end waste gas of dispensing exhaust purification unit respectively Amount, the gas-taking end waste gas oxygen content of kneading exhaust purification unit, the gas-taking end waste gas oxygen content of calciner emission clean unit, roasting The gas-taking end waste gas oxygen content for burning furnace exhaust clean unit is acquired；The dispensing exhaust purification unit gas-taking end exhaust gas flow Collection sensor, gas-taking end exhaust gas flow collection sensor, the calciner emission clean unit of kneading exhaust purification unit take The gas-taking end exhaust gas flow collection sensor of gas end exhaust gas flow collection sensor and roaster exhaust purification unit respectively to Expect exhaust purification unit gas-taking end exhaust gas flow, the gas-taking end exhaust gas flow of kneading exhaust purification unit, calciner emission purification The gas-taking end exhaust gas flow of unit is acquired with the gas-taking end exhaust gas flow of roaster exhaust purification unit；The air inlet End air mass flow collection sensor is acquired to air inlet end air mass flow；The air preheat control unit is to the sky Gas inlet end air carries out being heated to the minimum temperature；Dispensing exhaust purification unit, kneading exhaust purification unit, calcining furnace give up Each mixed oxygen content of pipeline gas-taking end waste gas after the collection of gas clean unit roaster exhaust purification unit is by adjusting State automatic regulating valve to be adjusted with booster fan parameter, each pipeline of exhaust gas flow described in each pipeline before mixing by regulation The mixed temperature of waste gas reaches the mixed minimum temperature setting oxygen interval value of waste gas, and each pipeline waste gas needs to protect Temperature；Described combustion-supporting gas mixing arrangement is set before the inlet end of flue connection system, the carbon waste gas is net The gas-taking end of dispensing exhaust purification unit, the gas-taking end of kneading exhaust purification unit, the calciner emission changed in processing system are net The gas-taking end of change unit, the input of the gas-taking end and the combustion-supporting gas mixing arrangement of roaster exhaust purification unit lead to respectively Gas piping connection is crossed, the automatic regulating valve and the booster fan are set up on each section of pipeline；The combustion-supporting gas mixing dress The output end put is connected the inlet end connection of system with the flue, the discharge end of flue connection system and boiler it is combustion-supporting Gas inlet end connects；Combustion-supporting gas discharge end connects with boiler inlet end, the combustion-supporting gas is inputted in the burner hearth of boiler, Fully burnt；If the gas-taking end waste gas of dispensing exhaust purification unit part, the gas-taking end waste gas of kneading exhaust purification unit part, calcining Reach most after the gas-taking end waste gas of furnace exhaust clean unit part, the gas-taking end waste gas mixing of roaster exhaust purification unit part Low temperature, the air for being preheating to certain temperature is re-introduced into, after being mixed with air, reaches setting oxygen interval value, then after mixing Dispensing exhaust purification unit, kneading exhaust purification unit, calciner emission clean unit, the portion of roaster exhaust purification unit Divide gas-taking end waste gas, then mixed with the air after preheating, collectively as combustion-supporting gas.
- The Zero discharging system 3. a kind of carbon industry exhausted air quantity according to claim 2 and pollutant become, in addition to：Boiler gives up Gas cleaning system；The boiler waste gas purification system, including, dust arrester, desulfurizer and low-level (stack-gas) economizer；The low temperature saves Before coal device is arranged on dust arrester so that when gases enter dust arrester, ensure normal working temperature；The desulfurization dress Put after being arranged on dust arrester, handle the gases after boiler combustion.
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| CN111282416A (en) * | 2020-01-23 | 2020-06-16 | 国家电投集团远达环保工程有限公司重庆科技分公司 | Electrolytic aluminum carbon anode roasting flue gas purification equipment and method |
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