CN102878570A - Method and equipment for treating chemical sludge by blending and combusting chemical sludge in pulverized coal furnace - Google Patents
Method and equipment for treating chemical sludge by blending and combusting chemical sludge in pulverized coal furnace Download PDFInfo
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- CN102878570A CN102878570A CN2012103808675A CN201210380867A CN102878570A CN 102878570 A CN102878570 A CN 102878570A CN 2012103808675 A CN2012103808675 A CN 2012103808675A CN 201210380867 A CN201210380867 A CN 201210380867A CN 102878570 A CN102878570 A CN 102878570A
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Abstract
The invention provides a technological process for treating sludge by blending and combusting the chemical sludge in a pulverized coal furnace. The technological process comprises the following steps of: discharging the chemical sludge with certain moisture content into a sludge bin; conveying the chemical sludge to a grinding and shearing machine via a sludge pump; pulverizing large sludge and then feeding the pulverized sludge to a stirrer; adjusting the moisture content until the moisture content meets requirements on atomizing; then conveying the sludge to an on-line filter via a sludge conveying pump; finally, atomizing the sludge via a steam atomizing nozzle; spraying the sludge into a hearth by a sludge nozzle; and blending the sludge with pulverized coal so as to be combusted. The technological process can be widely used for treating chemical sludge of a petrochemical enterprise. Compared with the conventional various sludge treatment technologies, the technological process is high in treatment efficiency, low in cost, small in treatment occupied area and low in environmental pollution.
Description
Technical field
The present invention relates to a kind of chemical engineering sludge processing method, relate in particular to a kind of coal-powder boiler and mix and burn worker's method for sludge treatment.
Background technology
Along with the attention of country to environmental protection, the requirement that solid waste is processed also becomes very urgent.Chemical engineering sludge is processed the solid waste that produces as petrochemical industry and sewage from oil refinery, output is huge, complicated component, and hard degradation, environmental pollution is not serious, at present still not efficiently, processing method thoroughly.
Domestic treatment technology to chemical engineering sludge mainly contains now: landfill method, partition method, sludge hot solution, chemical heat are washed method, pyrogenic process, bioanalysis and burning method etc.But landfill method produces adverse effect to soil; In the partition method, mechanical dehydration can produce secondary pollution to environment, and the cost that extraction is processed is high; The desired reaction condition of sludge hot solution is very high, complicated operation; Chemical heat is washed method and pyrogenic process has certain requirement to the composition of mud; The disposal ability of biological treatment is limited and the reaction time is very long; Burning method is present processing method the most thoroughly, but in traditional burning process, the investment of drying and dehydrating process is large, energy consumption is high, and can produce secondary pollution in transportation and storing process, and flue gas is processed investment greatly.
Summary of the invention
For the defective of above-mentioned method for sludge treatment, the invention provides a kind of coal-powder boiler and mix and burn worker's method for sludge treatment.
Characteristics of the present invention are: the chemical engineering sludge of sending here is regulated through the moisture content in early stage, the moisture content of mud is adjusted to 80% to 90%, make mud viscosity reach the required mobile requirement of atomizing, then mud is arrived nozzle with sludge pumping, after atomizing, spray into burner hearth, the mud of atomizing is burnt in high-temperature burner hearth, and the flue gas of generation is directly directly processed by the existing smoke processing system of boiler, thereby the burning that realizes mud is processed.Compare with traditional burning sludge method, this flow processing efficient is high, and cost is low, and floor space is little, and environmental pollution is little.
Described coal-powder boiler of the present invention is mixed and is burnt worker's method for sludge treatment and comprise the steps:
A pulverizes, adds water with mud and stirs, and again the moisture content of mud is adjusted to 80% to 90% after stirring, and filters out particle diameter greater than 0.2 millimeter particle clod; The control system that moisture percentage in sewage sludge adoption rate adjuster consists of is regulated.
B will make the mud atomizing through steam atomization nozzle again through the mud that above-mentioned steps was processed, the mass ratio of steam consumption and sludge quantity is controlled in 0.2, mud sprays in the burner hearth of coal-powder boiler after atomizing, with coal dust mixed combustion, the flue gas that produces is processed by the smoke processing system that coal-powder boiler carries, through emptying with flue gas behind dedusting, desulfurization, the denitrifying oxide device.The solid residue proportion of chemical engineering sludge after burning is less, along with the coal-powder boiler dreg removing system is discharged unified the processing.
In step a, mud is pulverized, adds water, the mass ratio of mud and water is 1:1.3-1:1.5; Be stirred to evenly, the moisture content to 80% of conditioning of mud is to 90%.
Coal-powder boiler of the present invention mix burn the used equipment of worker's method for sludge treatment comprise coal-powder boiler be connected the sludge storage bin, the sludge pump that connect with pipeline, grind shearing machine, agitator, defeated dredge pump, pot strainer and steam atomization nozzle; Wherein, the agitator top is provided with water supply pipe; Be provided with the end that jet chimney connects steam atomization nozzle; Its other end links to each other with mud nozzle in the steam coal-powder boiler.
For preventing agitator 4 issuable overflows when equipment stops up, connect the first arm by branch pipe tee connection on the agitator outlet trunk line, arm is connected to sludge storage bin; The loop that these pipelines form is as skimmer circuit.When equipment stopped up, mud flowed back to feed bin by this skimmer circuit.
Be the blast that prevents that system pressure raises and may cause when the spray nozzle clogging, connect the second arm by branch pipe tee connection on the trunk line before the mud nozzle, arm is connected to sludge storage bin, and this pipeline loop as the return line of the mud by filtration with ing.When spray nozzle clogging, mud flows back to feed bin through return line.Its return line also has second effect: when mud is mixed the sintering bundle, in time pass into water toward this loop, equipment is cleaned comprehensively, prevent that mud is residual and solidify in equipment, cause the difficulty of restarting.
For saving the floor space of equipment of the present invention, sludge storage bin is adopted the formula setting of sinking.
On each equipment part Pressure gauge is installed, thereby monitors the Operation Conditions of each equipment.For obtaining preferably atomizing effect, in processing procedure, need the pressure of the used steam of strict control steam atomization nozzle and the pressure at mud nozzle inlet place, at the jet chimney that links to each other with steam atomization nozzle and nozzle preceding pipeline the pressure sensor gaging pressure is set, thus the technological parameter in the control processing procedure.
Each segment pipe all is equipped with flowmeter and valve, thereby can monitor the Operation Conditions of each equipment.In order to realize the proper flow of mud in pipeline and atomizing effect well, the proportioning of atomizing steam in the proportioning of mud and running water, the nozzle in the strict control of the need mixer, therefore on the running water input channel of agitator, agitator mud input channel, atomizing steam conveyance conduit, flowmeter and valve need be set, with the flow of control mud, running water and atomizing steam.
The pulverizing of mud, stirring, filter process can also be arranged at sludge creation ground, then directly be pumped into the mixed burning boiler place by the nozzle ejection burning disposal by pipeline.Can save sludge storage bin like this, improve boiler environment on every side; Save transportation mud process, reduce secondary pollution.
Pipeline behind defeated dredge pump arranges a plurality of nozzles, and the mud after pulverizing, stir, regulate moisture content, filtering is assigned to different boilers, increases mud handling capacity, reduces and mixes the impact of burning boiler performance.
Usefulness of the present invention is:
Compare with present sludge incineration technology, the present invention has reduced the investment of dry run by the atomizing sludge incineration, has also saved floor space and the mud of sludge-drying stacking and has stacked the secondary pollution that causes; By in coal-powder boiler, burning, utilized the high temperature of burner hearth, reduce as much as possible pollution, as suppressed the generation of bioxin; By conditioning of mud and coal dust mix the burning ratio, will mix the impact control of efficiency of combustion in the burning process and smoke processing system within the acceptable range, thereby utilize the existing smoke processing system lignin-sludge of boiler to burn the flue gas that produces, reduced cost.These affiliated advantages must be brought significant economic benefit and social benefit to enterprise, make enterprise stand on the invincible position in the market competition of fierceness.
Description of drawings
Fig. 1 is that coal-powder boiler of the present invention is mixed and burnt worker's mud process chart.
The specific embodiment
In the present embodiment, adopt the coal-powder boiler #9(HG-410/110-2 raise sub-petrochemical thermal power plant) and coal-powder boiler #8(HG-220/110-10) burning mixed; The chemical engineering sludge of sub-petrifaction sewage treatment plant is raised in processing.
The concrete handling process of the present embodiment is:
1 chemical engineering sludge with sewage treatment plant is transported to steam power plant, leaves in the formula sludge storage bin 1 that sink; Mud is by sludge pump 2 and grind shearing machine 3 rear bulk mud and pulverized; Send into mixer 4 again, and add running water in mixer 4, the proportioning of mud and water is 1:1.3-1:1.5, and moisture percentage in sewage sludge is adjusted to 80%-90%; Filter out particle diameter greater than 0.2 millimeter particle clod; Mud after above-mentioned steps is processed increases transmitting power through defeated dredge pump 5, removes the bulky grain clod through pot strainer filter 6;
2 will atomize through steam atomization nozzle 7 through the mud that above-mentioned steps was processed, the mass ratio of steam consumption and sludge quantity is controlled in 0.2, then it is sprayed in the Pulverized Fuel Boiler Furnace 9 through mud nozzle 8, mixes with coal dust, the ratio of mud and coal dust is 0 ~ 3%, burning.
When equipment stops up, agitator 4 issuable overflows, the trunk line behind the agitator is provided with a branch pipe tee connection and is connected with an arm, and arm is connected to sludge storage bin; Mud can flow back to feed bin through this arm.
When spray nozzle clogging, the trunk line before the nozzle is provided with a branch pipe tee connection and connects an arm, and arm is connected to sludge storage bin, and mud can flow back to feed bin via arm.
The moisture percentage in sewage sludge of processing in the present embodiment is 74.9%, and the ratio of mud and coal dust is 0 ~ 3% when mixing burning, but the reduction of the boiler efficiency of #8, #9 stove all is no more than 0.2%, in the acceptable scope of engineering.Boiler exhaust gas behind the burning mixed mud is little on the impact of the load of the exhaust treatment system of boiler, enters hazard component (SO in the tail gas of atmosphere
2Deng) content far below the requirement of environment protectment protection; The content of heavy metal is also far below national standard in the lime-ash behind the burning mixed mud.
Claims (8)
1. a coal-powder boiler is mixed and is burnt worker's method for sludge treatment, may further comprise the steps:
A pulverizes, adds water with mud and stirs, and again the moisture content of mud is adjusted to 80% to 90% after stirring, and filters out particle diameter greater than 0.2 millimeter particle clod;
B will make the mud atomizing through steam atomization nozzle again through the mud that above-mentioned steps was processed, the mass ratio of steam consumption and sludge quantity is controlled in 0.2, mud sprays in the burner hearth of coal-powder boiler after atomizing, with the coal dust mixed combustion of sending into by burner, the flue gas of generation is processed by the smoke processing system that pulverized coal furnace carries.
2. coal-powder boiler according to claim 1 is mixed and is burnt worker's method for sludge treatment, it is characterized in that in step a mud being pulverized, add water, and the mass ratio of mud and water is 1:1.3-1:1.5; Be stirred to evenly, the moisture content to 80% of conditioning of mud is to 90%.
3. the described coal-powder boiler of claim 1 is mixed and is burnt the used equipment of worker's method for sludge treatment, it is characterized in that comprising coal-powder boiler be connected the sludge storage bin, the sludge pump that connect with pipeline, grind shearing machine, agitator, defeated dredge pump, pot strainer and steam atomization nozzle; Wherein, the agitator top is provided with water supply pipe; Be provided with the end that jet chimney connects steam atomization nozzle; Its other end links to each other with mud nozzle in the steam coal-powder boiler.
4. according to equipment claimed in claim 3, it is characterized in that: connect the first arm by branch pipe tee connection on the agitator outlet trunk line, arm is connected to sludge storage bin.
5. according to equipment claimed in claim 3, it is characterized in that: connect the second arm by branch pipe tee connection on the trunk line before the mud nozzle, arm is connected to sludge storage bin.
6. according to equipment claimed in claim 3, it is characterized in that: respectively with jet chimney that steam atomization nozzle links to each other on, on the nozzle preceding pipeline and water supply pipe the pressure sensor gaging pressure is set.
7. according to equipment claimed in claim 3, it is characterized in that: on the running water input channel of agitator, agitator mud input channel, the atomizing steam conveyance conduit flowmeter and valve are set, with the flow of control mud, running water and atomizing steam.
8. according to equipment claimed in claim 3, it is characterized in that: the pipeline behind defeated dredge pump arranges a plurality of nozzles, and the mud after pulverizing, stir, regulate moisture content, filtering is assigned to different boilers.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103808675A CN102878570A (en) | 2012-10-10 | 2012-10-10 | Method and equipment for treating chemical sludge by blending and combusting chemical sludge in pulverized coal furnace |
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| CN2012103808675A CN102878570A (en) | 2012-10-10 | 2012-10-10 | Method and equipment for treating chemical sludge by blending and combusting chemical sludge in pulverized coal furnace |
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| CN2012103808675A Pending CN102878570A (en) | 2012-10-10 | 2012-10-10 | Method and equipment for treating chemical sludge by blending and combusting chemical sludge in pulverized coal furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940472A (en) * | 2017-12-21 | 2018-04-20 | 浙江物华天宝能源环保有限公司 | The mingled burning installation of a kind of oil sludge and coal and mix firing technique |
| CN111892264A (en) * | 2020-08-24 | 2020-11-06 | 武汉永清环保科技工程有限公司 | Sludge co-combustion treatment device and treatment method without secondary exposure |
| CN112413606A (en) * | 2020-11-20 | 2021-02-26 | 北京首钢生物质能源科技有限公司 | Domestic waste and municipal sludge harmless cooperative treatment equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330752A (en) * | 1998-10-19 | 2002-01-09 | 美商·Eco/科技有限公司 | Co.-combustion of waste sludge in municipal waste combustors and other smelting furance |
| CN101117261A (en) * | 2007-07-18 | 2008-02-06 | 浙江环兴机械有限公司 | Sludge drying burning treatment method and integrated apparatus |
| CN102140003A (en) * | 2010-02-03 | 2011-08-03 | 北京中矿环保科技股份有限公司 | Sludge drying method, incineration method, sludge incineration device, thermal power plant and system |
-
2012
- 2012-10-10 CN CN2012103808675A patent/CN102878570A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330752A (en) * | 1998-10-19 | 2002-01-09 | 美商·Eco/科技有限公司 | Co.-combustion of waste sludge in municipal waste combustors and other smelting furance |
| CN101117261A (en) * | 2007-07-18 | 2008-02-06 | 浙江环兴机械有限公司 | Sludge drying burning treatment method and integrated apparatus |
| CN102140003A (en) * | 2010-02-03 | 2011-08-03 | 北京中矿环保科技股份有限公司 | Sludge drying method, incineration method, sludge incineration device, thermal power plant and system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940472A (en) * | 2017-12-21 | 2018-04-20 | 浙江物华天宝能源环保有限公司 | The mingled burning installation of a kind of oil sludge and coal and mix firing technique |
| CN111892264A (en) * | 2020-08-24 | 2020-11-06 | 武汉永清环保科技工程有限公司 | Sludge co-combustion treatment device and treatment method without secondary exposure |
| CN112413606A (en) * | 2020-11-20 | 2021-02-26 | 北京首钢生物质能源科技有限公司 | Domestic waste and municipal sludge harmless cooperative treatment equipment |
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Application publication date: 20130116 |