CN1019746B - A kind of dry purifying method with furnace gas - Google Patents
A kind of dry purifying method with furnace gasInfo
- Publication number
- CN1019746B CN1019746B CN89102481A CN89102481A CN1019746B CN 1019746 B CN1019746 B CN 1019746B CN 89102481 A CN89102481 A CN 89102481A CN 89102481 A CN89102481 A CN 89102481A CN 1019746 B CN1019746 B CN 1019746B
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- CN
- China
- Prior art keywords
- furnace gas
- dust
- heat pipe
- cooling
- temperature
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
A kind of dry purifying method with furnace gas that is applicable to furnace of calcium carbide, it is formed by furnace gas being carried out several steps such as elementary cooling, dust-filtering, secondary cooling and tar separation, dust burning.Its characteristics are that its employing water-cooled heat pipe cooler cools off furnace gas, cool off convenient and reliable, adopt the secondary water cooling to make the coal-tar middle oil separation of furnace gas, water coolant does not contact with furnace gas, solved the secondary water pollution problems, it adopts fluidized bed incinerator that dust is burned simultaneously, and the dust cyanide content is descended greatly.
Description
The present invention relates to the particularly purifying method of calcium carbide burner gas of a kind of furnace gas, it comprises burns several steps to elementary cooling that stove carries out, Chalk-dust filtering, secondary cooling and tar separation, dust.
The calcium carbide furnace gas method has wet purification method and dry cleaning point.The wet purification method is that furnace gas is sprayed water, and prussiate in the furnace gas is dissolved in the water removes from furnace gas.But the water that contains prussiate has caused the water of secondary to pollute, and sewage disposal does not at present still have suitable method.At present abroad all in exploitation dry cleaning method, the dry cleaning method of Japanese diamond engineering corporation, Norway Ai Ken company has been represented at present prior art situation both at home and abroad.
Norway Ai Ken company provides a kind of dry purifying method with furnace gas that calcium carbide burner gas is carried out dedusting and dust burning.Narrate its step below in conjunction with its flue gas cleaning schema (Fig. 1): temperature is that 500～800 ℃, dust content are 20～200g/Nm
3Calcium carbide burner gas reduce to 250 ℃ through temperature behind the cooling cyclone, furnace gas enters deep bed filter to make dust-filtering in the furnace gas, temperature after filtering is that 200 ℃, dust content are not more than 50mg/Nm then
3Furnace gas be sent to the user by blower fan.Dust under filtering is sent into rotary kiln through chain conveyer, bunker and is burned, and the slag after the burning is sent into ash bucket through the revolution water cooler, and waste gas enters atmosphere through filter.The shortcoming of this method is that the cooling cyclone employing is air-cooled, cooling performance is not good enough, and need additional two driven by motor blower fans, do not have the tar separation step in the method, the furnace gas temperature that therefore is transported to the user should remain on more than 200 ℃, to prevent tar condensing on the tube wall, pipeline need be incubated, and when air-flow stops, need adopting heating coil, and adopt rotary kiln that dust is burned in the method, the dust cyanide content after the burning still has 10mg/kg.
Japan diamond engineering corporation provides a kind of dry purifying method with furnace gas that calcium carbide burner gas is carried out dedusting, tar separation, dust burning.Narrate its step below in conjunction with its flue gas cleaning schema (Fig. 2): temperature is that 500～600 ℃, dust content are 75～150g/Nm
3Calcium carbide burner gas enter burner-gas cooler through the furnace gas suction tube, cooled temperature is that 250 ℃ furnace gas enters deep bed filter and filters out dust, the temperature after the filtration is that 200 ℃, dust content are not more than 50mg/Nm
3Furnace gas through water drip cooler, rotary drum tar separation machine the tar separation in the furnace gas is gone out, clean then furnace gas is sent to the user by blower fan.The dust that filters out discharges through dust that machine, buried scraper conveyor enter pre-burning stove, roasting kiln burns, and the slag after the burning arrives ash bucket through water cooler, and waste gas enters atmosphere through filter.The shortcoming of this method is that the furnace gas cold gas is that 10 weldless steel tubes of anti-the high humidity are formed, adopt the naturally cooling method, the water cooler volume is big, complex structure, in the method furnace gas is carried out the spray quinoline formula water cooler and the cooling of rotary drum tar separation machine employing recirculated cooling water of tar separation, CN in the water coolant does not have special treatment method, caused secondary pollution, adopted preheating oven and roasting kiln that dust is burned in the method, the dust cyanide content after the burning still has 10mg/kg.
The objective of the invention is to avoid above-mentioned weak point of the prior art, provide the cooling of a kind of furnace gas easy reliable, tar separation does not produce secondary pollution, dust burns and makes cyanide content be significantly less than the improved dry purifying method with furnace gas of 10mg/kg.
Purpose of the present invention can reach by following measure: adopt the water-cooled heat pipe cooler that furnace gas is carried out elementary cooling, the heat pipe hot spots of heat pipe cooler is in the high-temperature furnace gas circulation, and cooling segment is in the tank, and water temp in the adjusting tank or flow are controlled the temperature through the furnace gas of heat pipe cooler easily and effectively; Adopt same heat pipe cooler that furnace gas is carried out secondary cooling and tar separation, water temp in the adjusting tank or flow are reduced to furnace gas temperature and are not more than 50 ℃, tar condensing is separated out along tube wall and is flowed in the water sealed tank of bottom, and furnace gas does not contact with water coolant all the time; The dust that filters out adopts fluidized combustion.
The drawing of accompanying drawing is described as follows:
Fig. 1: the schema of the calcium carbide burner gas dry cleaning method that Norway Ai Ken company provides.
Fig. 2: the schema of the calcium carbide burner gas dry cleaning method that Japanese diamond engineering corporation provides.
Fig. 3: the schema of dry purifying method with furnace gas provided by the invention.
Fig. 4: the heat pipe cooler structural representation that the present invention uses.
In the accompanying drawing 3: 1. furnace of calcium carbide, 2. elementary heat pipe cooler, 3. cloth envelop collector, 4. secondary heat pipe cooler, 5. water sealed tank, 6. blower fan, 7. chain conveyor, 8. dust silo, 9. screw feeder, 10. incinerator, 11. air heat tube preheaters, 12. heat pipe coolers, 13. cloth envelop collector, 14 blower fans, 15. blower fans, 16. ash buckets.
The present invention is described in further detail below in conjunction with (accompanying drawing 3, Fig. 4) embodiment:
Temperature is that 600～900 ℃, dust content are 50～150g/Nm
3Calcium carbide burner gas enter elementary heat pipe cooler 2 by a suction tube.The heat pipe cooler structure as shown in Figure 4, heat pipe hot spots wherein is in the runner of high-temperature furnace gas, and cooling segment places tank, by heat pipe the heat of furnace gas is passed to water coolant, regulate the temperature of water coolant and the temperature that flow makes furnace gas and be reduced to 220～250 ℃, the water coolant after the heating can be used as thermal source and is used.Cooled furnace gas enters deep bed filter 3 and filters out dust in the furnace gas.Furnace gas after the filtration enters roughly the same 2 secondary heat pipe cooler 4 of structure, regulating temperature of cooling water and flow reduces to below 50 ℃ the temperature of furnace gas, the coal-tar middle oil air elutriation of furnace gas goes out to form tar fog, and on the tube wall attached to heat pipe, flow into along tube wall in the water sealed tank 5 of hot tube heat exchanger bottom, the clean furnace gas of separating out behind the tar is sent to the user with exhaust blower.The dust that filters out is delivered to dust silo 8 by chain conveyor 7, dust is delivered to fluidized bed incinerator 10 through screw feeder 9 in the storehouse, the incinerator bed temperature remains on 700～900 ℃, along with increasing of bed temperature, it is better spherical that the ash of slag is reunited, the content of prussiate is lower, bed temperature be 750～850 ℃ the most suitable.Dust after the burning falls into the ash bucket 16 of below, and its dust cyanide content is not more than 1mg/kg.Waste gas enters atmosphere through air heat tube preheater 11, heat pipe cooler 12, cloth envelop collector 13.
The present invention has following advantage compared to existing technology:
1. adopt a water-cooled heat pipe cooler that furnace gas is carried out elementary cooling, simple in structure, cooling effect is reliable, and chilling temperature is easy to adjust, and the high temperature sensible heat in the furnace gas can obtain recycling.
2. adopt the water-cooled heat pipe cooler that furnace gas is carried out secondary cooling and tar separation, furnace gas does not directly contact with water coolant, non-secondary pollution.
3. adopt fluidized-bed that dust is burned, dust cyanide content after the burning is dropped to be not more than 1mg/kg.
Claims (2)
1, a kind of dry purifying method with furnace gas that is specially adapted to use the stone stove that furnace gas is carried out elementary cooling, dust-filtering, secondary cooling and tar separation, dust burning is characterized in that:
(1) adopts the water-cooled heat pipe cooler that furnace gas is carried out elementary cooling furnace gas temperature is cooled to 220 ℃～250 ℃, the heat pipe hot spots of heat pipe cooler is in the runner of high-temperature furnace gas, and cooling segment is in the tank, water temp in the adjusting tank or flow control are through the temperature of the furnace gas of heat pipe cooler, and water coolant does not contact with furnace gas by the dividing plate in the heat pipe cooler;
(2) employing is carried out secondary cooling and tar separation by (1) said heat pipe cooler type of cooling to furnace gas, and water temp in the adjusting tank or flow are reduced to furnace gas temperature and be not more than 50 ℃, and tar condensing is separated out along tube wall and flowed in the water sealed tank of bottom;
(3) dust that filters out adopts fluidized bed incinerator to burn, and the incinerator bed temperature remains on 750 ℃～850 ℃.
2, according to the said method of claim 1, it is characterized in that: temperature to 220～250 ℃ of regulating furnace gas in the elementary heat pipe cooler, furnace gas enters a deep bed filter and filters out dust, be sent to the user through secondary cooling and tar separation by blower fan again, the dust that filters out is delivered to a dust silo by a chain conveyor, dust is delivered to the fluidized bed incinerator burning through a screw feeder in the storehouse, burn the back dust and fall into an ash bucket, waste gas is through an air heat tube preheater, and heat pipe cooler, cloth envelop collector enter atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89102481A CN1019746B (en) | 1989-11-21 | 1989-11-21 | A kind of dry purifying method with furnace gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89102481A CN1019746B (en) | 1989-11-21 | 1989-11-21 | A kind of dry purifying method with furnace gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1051870A CN1051870A (en) | 1991-06-05 |
| CN1019746B true CN1019746B (en) | 1992-12-30 |
Family
ID=4854753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89102481A Expired CN1019746B (en) | 1989-11-21 | 1989-11-21 | A kind of dry purifying method with furnace gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1019746B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100444932C (en) * | 2006-12-18 | 2008-12-24 | 青海东胜化工有限公司 | Drytype process for purifying tail gas from calcium carbide production furnace |
| CN102382689B (en) * | 2011-08-09 | 2013-12-11 | 中国天辰工程有限公司 | Positive-pressure dry dust removing and purifying method for calcium carbide furnace gas |
| CN103063046B (en) * | 2013-01-25 | 2015-09-09 | 四川岷江电化有限公司 | The process of closed type calcium carbide furnace exhaust gas dust and UTILIZATION OF VESIDUAL HEAT IN technique |
| CN106065998A (en) * | 2016-07-19 | 2016-11-02 | 杭州燃油锅炉有限公司 | A kind of biomass gasification burning induction system |
-
1989
- 1989-11-21 CN CN89102481A patent/CN1019746B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1051870A (en) | 1991-06-05 |
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| CF01 | Termination of patent right due to non-payment of annual fee |