CN103341300A - Method for purifying waste incineration smoke by using novel dry process raw material vertical mill - Google Patents
Method for purifying waste incineration smoke by using novel dry process raw material vertical mill Download PDFInfo
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- CN103341300A CN103341300A CN2013103104737A CN201310310473A CN103341300A CN 103341300 A CN103341300 A CN 103341300A CN 2013103104737 A CN2013103104737 A CN 2013103104737A CN 201310310473 A CN201310310473 A CN 201310310473A CN 103341300 A CN103341300 A CN 103341300A
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Abstract
The invention discloses a method for purifying waste incineration smoke by using a novel dry process raw material vertical mill. The method comprises the following steps of: 1, putting pretreated domestic garbage in an incinerator outside a cement kiln for inclination; 2, introducing incineration smoke into a raw material vertical mill, absorbing organic pollutants in the smoke by using a raw material; 3, sending materials discharged from the mill to a dust remover for separating; 4, sending the materials to a cement rotary kiln for carrying out high-temperature calcination to decompose and absorb harmful gases; and 5, removing dust from the smoke. According to the method, the problems of complex control in combustion working conditions, large influence to clinker firing, low incineration heat energy utilization rate and the like in a project of an existing novel dry process cement production line in combination with treating the domestic garbage are solved. On the premise of no influencing the stability of a clinker firing system, harmful materials in the smoke are purified, the treating step and the running cost of conventional smoke are reduced, and the incineration heat energy utilization rate is increased.
Description
Technical field
The present invention relates to a kind of method of utilizing new type nonaqueous cement production line Vertical Mill equipment clean flue gas of refuse burning.
Background technology
At present the method for the purifying flue gas of refuse burning that adopts of garbage incinerating power plant have that the purified treatment step is many, problems such as complicated operation, treatment facility have high input, operating cost height, and mostly existing new type nonaqueous cement kiln cooperative disposal garbage entries is the flue gas that produces in the waste incineration process is inserted in the preheating decomposition system, existence influences big to the dore furnace operating mode, technical process is controlled complexity, the clinker burning system is relied on height, burns problems such as the heat energy utilization rate is low.In recent years, Vertical Mill had become new type nonaqueous cement production line to the preferred unit of raw material grinding, and the hot blast of its oven dry material is from kiln tail preheater or hot-blast stove.And utilize the heat of waste incineration generation as the thermal source of dried material, utilize the method for the alkaline components purification incineration flue gas of material in the mill to be in blank at home in the time of the oven dry material.
Summary of the invention
Technical problem to be solved by this invention is: exist the influence of cement operating mode big in order to solve present new dry process production line cooperative disposal house refuse, the technology controlling and process complexity, to the clinker burning system rely on high, burn problems such as the heat energy utilization rate is low, a kind of method of utilizing raw material Vertical Mill purifying flue gas of refuse burning in the new type nonaqueous cement production line is provided.
Technical solution of the present invention is: it comprises the steps: (1), pretreated house refuse input cement kiln external incineration furnace is burned; (2), incineration flue gas feeds the raw material Vertical Mill, with the organic pollution in the raw material absorption flue gas; (3), go out grind materials and send into the deduster separation; (4), material is sent into cement rotary kiln high-temperature calcination decomposition absorption pernicious gas; (5), flue gas ash removal.
Technique effect of the present invention is: the combustion conditions control complexity, the grog that have solved present new type nonaqueous cement production line cooperative disposal house refuse project existence burn till problems such as influence is big, burning heat energy utilization rate is low.Saved the smoke processing system of waste incineration and generating electricity, reduced gas cleaning operating cost, the gas index of its discharging is better than China's " consumer waste incineration pollution control criterion ".Simultaneously, for the raw material Vertical Mill provides the oven dry thermal source, not influencing under the stable prerequisite of grog firing system, purify harmful substance in the flue gas, reduced treatment step and the operating cost of conventional flue gas, improved burning heat energy utilization rate.
The specific embodiment
The present invention utilizes the method for raw material Vertical Mill purifying flue gas of refuse burning to implement according to following steps: one, rubbish is sent in the cement kiln external incineration furnace and burnt; Two, temperature control is dried material in 200 ℃～350 ℃ flue gas of refuse burning feeding raw material Vertical Mill, go out to grind temperature control at 70 ℃～95 ℃; Three, go out grind materials and enter deduster with air-flow, realize that material, gas separate; Four, the raw material of harmful substance enter cement rotary kiln and carry out high-temperature calcination through induction system in the absorption incineration flue gas; Five, flue gas ash removal.
The house refuse complicated component burns in the flue gas that produces and contains acid contaminant and heavy metal contaminants.The present invention is that 200 ℃～350 ℃ high-temperature flue gas is introduced from the grinding machine bottom with temperature, draft by exhaust blower causes bigger negative pressure at the body inner chamber, under the airflow effect, make the interior fine granular materials of mill be in suspended state, high-temperature flue gas takes place fully to contact with material, when the material that still contains certain moisture behind the grinding was carried out suspension drying, contained alkali substance reactions such as a large amount of calcium oxide in acidic gas in flue gas and the material made that sour gas obtains removing in the flue gas.The gaseous state of trace or solid-state heavy metal can be had the material absorption than bigger serface in the flue gas in the material.Through the sorting of powder concentrator, meal is got back to mill with the material of feeding grinding again, and fine powder goes out mill with air-flow and enters deduster.The present invention has substituted in the new dry process raw material roller mill from the heat of kiln tail preheater or hot-blast stove with the high-temperature flue gas waste heat of waste incineration, has saved the energy, has purified flue gas of refuse burning under the prerequisite that does not influence the grog firing system.
After flue gas of refuse burning of the present invention purifies through the raw material Vertical Mill, organic pollution and heavy metal contaminants are attracted in the raw material powder, and the raw material powder enters dore furnace with air-flow through cyclone preheater, enters rotary kiln afterwards, harmful substance such as ， bioxin is thoroughly decomposed under 1400 ℃ of high temperature of rotary kiln.Wherein heavy metal is solidly soluted in the mineral lattice of clinker, thereby has organized the stripping of heavy metal effectively, makes harmful substance obtain safety and stability processing up hill and dale.
The present invention is the flue gas of consumer waste incineration generation and the organic combination of raw material Vertical Mill in the new dry process production line, do not influencing under the stable prerequisite of grog firing system, purified harmful substance in the flue gas, reduce treatment step and the operating cost of conventional flue gas, improved burning heat energy utilization rate.Adopt the present invention to handle house refuse, the gas index of its discharging is better than China's " consumer waste incineration pollution control criterion ", and clinker production status and cement quality are unaffected.
Claims (7)
1. a method of utilizing new dry process raw material Vertical Mill purifying flue gas of refuse burning is characterized in that, comprises the steps: (1), pretreated house refuse input cement kiln external incineration furnace is burned; (2), incineration flue gas feeds the raw material Vertical Mill, with the organic pollution in the raw material absorption flue gas; (3), go out grind materials and send into the deduster separation; (4), material is sent into cement rotary kiln high-temperature calcination decomposition absorption pernicious gas; (5), flue gas ash removal.
2. new dry process raw material Vertical Mill according to claim 1 purifies the method for incineration flue gas, it is characterized in that, enters the gas temperature control of raw material Vertical Mill at 200 ℃～350 ℃.
3. new dry process raw material Vertical Mill according to claim 1 purifies the method for incineration flue gas, it is characterized in that, goes out to grind gas flow temperature control at 70 ℃～95 ℃.
4. new dry process raw material Vertical Mill according to claim 1 purifies the method for incineration flue gas, it is characterized in that the time of contact of flue gas and raw material was above 5 seconds in the step 2.
5. new dry process raw material Vertical Mill according to claim 1 purifies the method for incineration flue gas, it is characterized in that kiln temperature is 1400 ℃～1600 ℃.
6. new dry process raw material Vertical Mill according to claim 1 purifies the method for incineration flue gas, it is characterized in that the cement kiln external incineration furnace is the stoker fired grate formula.
7. new dry process raw material Vertical Mill according to claim 1 purifies the method for incineration flue gas, it is characterized in that the house refuse preliminary treatment comprises fragmentation, extrusion dehydration and oven dry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103104737A CN103341300A (en) | 2013-07-23 | 2013-07-23 | Method for purifying waste incineration smoke by using novel dry process raw material vertical mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013103104737A CN103341300A (en) | 2013-07-23 | 2013-07-23 | Method for purifying waste incineration smoke by using novel dry process raw material vertical mill |
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| CN103341300A true CN103341300A (en) | 2013-10-09 |
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| CN2013103104737A Pending CN103341300A (en) | 2013-07-23 | 2013-07-23 | Method for purifying waste incineration smoke by using novel dry process raw material vertical mill |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4617182A (en) * | 1985-08-26 | 1986-10-14 | Air Products And Chemicals, Inc. | Cascade heat recovery with coproduct gas production |
| CN101618954A (en) * | 2009-07-20 | 2010-01-06 | 中信重工机械股份有限公司 | Process system for processing municipal domestic waste by cement rotary kiln |
| CN101628792A (en) * | 2009-07-29 | 2010-01-20 | 郭涵 | Method for processing municipal solid waste by using shaft kiln cement production line |
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2013
- 2013-07-23 CN CN2013103104737A patent/CN103341300A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4617182A (en) * | 1985-08-26 | 1986-10-14 | Air Products And Chemicals, Inc. | Cascade heat recovery with coproduct gas production |
| CN101618954A (en) * | 2009-07-20 | 2010-01-06 | 中信重工机械股份有限公司 | Process system for processing municipal domestic waste by cement rotary kiln |
| CN101628792A (en) * | 2009-07-29 | 2010-01-20 | 郭涵 | Method for processing municipal solid waste by using shaft kiln cement production line |
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Application publication date: 20131009 |