CN101571294B - Ammonia-containing tail gas treating furnace - Google Patents
Ammonia-containing tail gas treating furnace Download PDFInfo
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- CN101571294B CN101571294B CN2009101153431A CN200910115343A CN101571294B CN 101571294 B CN101571294 B CN 101571294B CN 2009101153431 A CN2009101153431 A CN 2009101153431A CN 200910115343 A CN200910115343 A CN 200910115343A CN 101571294 B CN101571294 B CN 101571294B
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- ammonia
- tail gas
- containing tail
- heater
- gas treating
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to an ammonia-containing tail gas treatment technology which is produced by calcinating ammonium paratungstate in tungsten hydrometallurgy industry, in particular to an ammonia-containing tail gas treating furnace. Currently incineration technology is adopted to treat the ammonia-containing tail gas, which needs to consume fuel gas to provide heat energy for combustion and discharges exhaust gases such as carbon dioxide and the like which can pollute the environment. The invention is characterized in that an air intake is arranged on the wall of a preheated chamber, a flame arrester is arranged between the air intake and an inlet pipe; a water spray extinguishment nozzle is arranged on the end of the flame arrester near the air intake, an explosion-proof port is also arranged on the wall of the preheated chamber; a heating chamber which is located in the middle of a furnace body is communicated with the preheated chamber. A heater is arranged inside the heating chamber, a catalyst layer is arranged above the heater, an insulating layer is arranged on the inner wall of the heating chamber; an exhaust port is arranged on the upper part of the furnace body which is communicated with the heating chamber. By adopting the technical scheme of the invention, ammonia gas can be decomposed to combustible gases that can completely combust, the follow-up combustion need no external heat supplied, thus enjoying environmental protection and economy.
Description
Technical field
The present invention relates to the ammonia vent gas treatment technology that the ammonium paratungstate calcining is produced in the tungsten hydrometallurgy industry, particularly a kind of ammonia-containing tail gas treating furnace.
Background technology
In the tungsten hydrometallurgy production process, use ammonium chloride, liquefied ammonia preparation to resolve agent and be used for producing and making the ammonium paratungstate product at home, generation tail gas contains NH during the ammonium paratungstate calcining and decomposing in the tail gas
3, H
2O, O
2, N
2And dust, ammonia emission place vegetation is withered, and foul smell is smoked the people, and grievous injury people's respiratory system influences atmospheric environment, causes serious environmental pollution.For now, in the sector ammonia tail gas is not had complete treatment technology, some enterprises adopt spraying method to handle ammonia, and absorption liquid enters waste water, causes the ammonia-nitrogen content in the industrial wastewater to exceed standard, and has produced new secondary pollution.Along with the waste gas pollution control and treatment development of technology, the ammonia treatment of waste gas there have been now new technologies such as biological filtering tower combined working technology and incineration technology, the ammonia nitrogen that the biological filtering tower combined working technology is mainly used in the waste water is handled, and incineration technology also only adapt to be handled and is contained some high petrochemical industries of ammonia concentration, and need consume fuel gas to provide combustion heat energy, and with exhaust gas discharging such as carbon dioxide for it.
Summary of the invention
The object of the invention provides a kind of not only environmental protection but also economic ammonia-containing tail gas treating furnace, it can accomplish not have harmful exhaust emissions, do not need extra fuel and come sustained combustion tail gas by self combustion heat, the influence of having avoided ammonia emission that atmospheric environment is caused realizes the environmental requirement of no ammonia pollution.
The present invention adopts technical scheme to be: a kind of ammonia-containing tail gas treating furnace, comprise the bottom of furnace body preheating cavity, on the wall of preheating cavity, be provided with air inlet, between air inlet and air inlet pipe, spark arrester is housed, spark arrester is installed water near the air inlet end and is drenched fire extinguishing sprayer, also is furnished with venting on the wall of preheating cavity; The body of heater middle part is a heating clamber, and heating clamber communicates with preheating cavity, and heater is installed in the heating clamber, and catalyst layer is arranged in above the heater, arranges heat-insulation layer at the heating clamber inwall; Upper of furnace body is an exhaust outlet, communicates with heating clamber;
Spark arrester is the cylindrical tube of a dress thin copper wire, and two ends are connected with air inlet pipe with the preheating cavity air inlet with ring flange respectively;
The venting inner end is fixed with compressed asbestos sheet as the burst disk film, and the outer end can connect a column barrel, can be filled with water in the bucket and seal venting;
Heater is a resistance wire, adopts siderochrome silk exothermic material;
Heater is regulated the temperature of heater by thermocouple temperature measurement and temperature controller;
Catalyst layer adopts nickel, manganese, iron as catalyst;
It is insulation material that heat-insulation layer adopts alumino-silicate brick.
The spark arrester that air inlet is installed can prevent tempering, once tempering occurs water pouring fire extinguishing sprayer is put out tempering.Heating clamber outer wall heat-insulation layer prevents that heat from distributing, and plays insulation effect, guarantees the required energy demand of the follow-up cartalytic decomposition effect of ammonia, and the exhaust outlet on heating clamber top works to collect gas and windproof, anti-rain.
Ammonia catalyst of the present invention is at high temperature, H is arranged
2Use its catalytic decomposition under the situation of O for a long time
The reactive group present principles:
Ammonia resolves into N under 800～1000 ℃ temperature
2And H
2, H
2With the O in the mist
2Reaction generates H
2O also emits heat, can keep the required energy demand of subsequent reactions under the release of reaction heat.By thermally equilibrated calculating, designed the reacting furnace of heat balance, promptly do not increase the just sustainable operation of heat newly during operate as normal, saved energy greatly.In other words, heater only need play ignition action, once ammonia resolves into N
2And H
2, H
2It is temperature required that burned back produces the enough ammonia decomposition of heat, can close heater at this moment, need not the extraneous heat of supplying with, and burning after this almost is the cost free operation.
The good effect that the present invention produced: the ammonia-containing exhaust that can handle variable concentrations, also can handle the ammonia-containing exhaust that contains other fuel gas, after ammonia-containing tail gas treating furnace was handled, ammonia can all obtain decomposition and inversion, no longer produced the problem of ammonia pollution and secondary environmental pollution; Ammonia decomposes the temperature required id reaction of leaning on after the gas combustion can provide, and therefore follow-up burning almost is the cost free operation, has saved a large amount of energy; Carry out subsequent combustion owing to need not the extraneous heat of supplying with, production cost significantly reduces; Need not artificial nurse after the burning, saved the labour.
Description of drawings
Accompanying drawing is a structural representation of the present invention.
1 preheating cavity among the figure, 2 heaters, 3 catalyst layers, 4 heat-insulation layers, 5 exhaust outlets, 6 water drench fire extinguishing sprayer, 7 spark arresters, 8 air inlet pipe, 9 ventings.
The specific embodiment
Preheating cavity adopts the cylinder barrel shaped steel construction, opens two circular ports on the barrel, is respectively air inlet and venting;
Spark arrester is the cylindrical tube of a dress thin copper wire, and two ends are connected with air inlet pipe with the preheating cavity air inlet with ring flange respectively;
The venting inner end is fixed with compressed asbestos sheet as the burst disk film, and the outer end can connect a column barrel, can be filled with water in the bucket and seal venting;
Square structure is made with steel plate in the heating clamber outside, empty brick laying structure in building by laying bricks or stones with the alumina silicate insulating brick in quadra;
Heater is a resistance wire, adopts siderochrome silk exothermic material, and the heat-insulation layer that the resistance wire eduction rod passes body of heater links to each other with power line, adopts thermocouple temperature measurement, by temperature controller control heater silicon controlled power output, control heater temperature;
Catalyst layer adopts nickel, manganese, iron as catalyst.
Ammonia-containing tail gas treating furnace of the present invention is sent to preheating cavity by blower fan through the air inlet of air inlet pipe, bottom of furnace body with ammonia-containing exhaust and carries out preheating, heating of resistance wire heater and catalyst effect of the present invention by heating clamber, be under 800 ℃～1000 ℃ the condition, ammonia to be decomposed into N in heating-up temperature
2And H
2, imflammable gas can all burn in heating clamber fully, the nontoxic N of unburned
2Discharge by exhaust outlet.The ammonia catalytic decomposition becomes N
2And H
2, H
2With the O in the mist
2Reaction generates H
2O also emits heat, discharge heat and can keep the required energy demand of subsequent reactions, so heater only need play ignition action, once ammonia resolves into N
2And H
2, H
2It is temperature required that burned back produces the enough ammonia decomposition of heat, can close heater at this moment, and burning after this almost is the cost free operation, need not the extraneous heat of supplying with.Discharge the ammonia-containing exhaust that heat can also preheating enters into preheating cavity.
Claims (7)
1. ammonia-containing tail gas treating furnace, it is characterized in that: comprise the bottom of furnace body preheating cavity, on the wall of preheating cavity, be provided with air inlet, between air inlet and air inlet pipe, spark arrester is housed, spark arrester is installed water near the air inlet end and is drenched fire extinguishing sprayer, also is furnished with venting on the wall of preheating cavity; The body of heater middle part is a heating clamber, and heating clamber communicates with preheating cavity, and heater is installed in the heating clamber, and catalyst layer is arranged in above the heater, arranges heat-insulation layer at the heating clamber inwall; Upper of furnace body is an exhaust outlet, communicates with heating clamber.
2. according to the described a kind of ammonia-containing tail gas treating furnace of claim 1, it is characterized in that: spark arrester is the cylindrical tube of a dress thin copper wire, and two ends are connected with air inlet pipe with the preheating cavity air inlet with ring flange respectively.
3. according to the described a kind of ammonia-containing tail gas treating furnace of claim 1, it is characterized in that: the venting inner end is fixed with compressed asbestos sheet as the burst disk film, and the outer end connects a column barrel, can be filled with water in the bucket and seal venting.
4. according to the described a kind of ammonia-containing tail gas treating furnace of claim 1, it is characterized in that: heater is a resistance wire, adopts siderochrome silk exothermic material.
5. according to claim 1 or 4 described a kind of ammonia-containing tail gas treating furnaces, it is characterized in that: heater also is connected with thermocouple temperature measurement instrument and temperature controller.
6. according to the described a kind of ammonia-containing tail gas treating furnace of claim 1, it is characterized in that: catalyst layer adopts nickel, manganese, iron as catalyst.
7. according to the described a kind of ammonia-containing tail gas treating furnace of claim 1, it is characterized in that: it is insulation material that heat-insulation layer adopts alumino-silicate brick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101153431A CN101571294B (en) | 2009-05-10 | 2009-05-10 | Ammonia-containing tail gas treating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101153431A CN101571294B (en) | 2009-05-10 | 2009-05-10 | Ammonia-containing tail gas treating furnace |
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| Publication Number | Publication Date |
|---|---|
| CN101571294A CN101571294A (en) | 2009-11-04 |
| CN101571294B true CN101571294B (en) | 2011-04-27 |
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| CN2009101153431A Active CN101571294B (en) | 2009-05-10 | 2009-05-10 | Ammonia-containing tail gas treating furnace |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339705B (en) * | 2017-08-23 | 2023-10-27 | 洛阳联创锂能科技有限公司 | Asphalt flue gas incinerator |
| CN108844087A (en) * | 2018-09-07 | 2018-11-20 | 云汇环保科技南通有限公司 | A kind of novel C O furnace |
| CN114797448A (en) * | 2022-04-02 | 2022-07-29 | 天津丰东热处理有限公司 | Ammonia decomposition furnace for exhaust of heat treatment nitriding furnace |
| CN115159571A (en) * | 2022-06-29 | 2022-10-11 | 安徽望盛钒基新材料技术有限公司 | Production V based on ammonium vanadate raw material 2 O 5 Process system and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1104172A (en) * | 1994-10-06 | 1995-06-28 | 上海冶金设计研究院 | Method for preparation of carbon monoxide-hydrogen-nitrogen type atmosphere and its apparatus |
| CN2359567Y (en) * | 1998-10-26 | 2000-01-19 | 陈道明 | Combustion chamber of ammonia combustion generator |
| CN201191000Y (en) * | 2007-12-06 | 2009-02-04 | 北京航天石化技术装备工程公司 | Incineration processing system for ammine-containing waste gas |
| CN201401797Y (en) * | 2009-05-10 | 2010-02-10 | 崇义章源钨业股份有限公司 | Ammonia tail gas treating furnace |
-
2009
- 2009-05-10 CN CN2009101153431A patent/CN101571294B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1104172A (en) * | 1994-10-06 | 1995-06-28 | 上海冶金设计研究院 | Method for preparation of carbon monoxide-hydrogen-nitrogen type atmosphere and its apparatus |
| CN2359567Y (en) * | 1998-10-26 | 2000-01-19 | 陈道明 | Combustion chamber of ammonia combustion generator |
| CN201191000Y (en) * | 2007-12-06 | 2009-02-04 | 北京航天石化技术装备工程公司 | Incineration processing system for ammine-containing waste gas |
| CN201401797Y (en) * | 2009-05-10 | 2010-02-10 | 崇义章源钨业股份有限公司 | Ammonia tail gas treating furnace |
Non-Patent Citations (2)
| Title |
|---|
| 吕藩初等.氨燃烧制氮装置及其应用.《钢铁》.1990,第25卷(第8期),48-51. * |
| 杜雯.钨冶金过程氨尾气的治理与循环利用工艺研究.《中国钨业》.2008,第23卷(第6期),43-46. * |
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| CN101571294A (en) | 2009-11-04 |
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Denomination of invention: Ammonia-containing tail gas treating furnace Effective date of registration: 20171227 Granted publication date: 20110427 Pledgee: Chongyi branch of China Co truction Bank Corp Pledgor: Chongyi Zhangyuan Tungsten Co.,Ltd. Registration number: 2017360000052 |