CN1563298A - Deashing agent in use for burning of coal for preventing charing and rotting away - Google Patents
Deashing agent in use for burning of coal for preventing charing and rotting away Download PDFInfo
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- CN1563298A CN1563298A CN 200410026749 CN200410026749A CN1563298A CN 1563298 A CN1563298 A CN 1563298A CN 200410026749 CN200410026749 CN 200410026749 CN 200410026749 A CN200410026749 A CN 200410026749A CN 1563298 A CN1563298 A CN 1563298A
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- coal
- burning
- charing
- preventing
- anticorrosion
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Abstract
An agent of cokeproof, anticorrosion and ash removal in coal combustion is prepared by mixing uniformly the dried and ground residue of calcim hydroxide with powdered graphite of which graphite content is 45-90%. The prepared agent can raise flowing ability of water coal slurry under condition of high temperature combustion greatly.
Description
The present invention relates to a kind of coal burning additive.
The boiler of existing burning coal, because the contained low-melting material of ash behind the coal burning is more, cause coal in the high-temp combustion process, low melting point influences the melt temperature of coal easily, make ash cohere into piece easily, the at high temperature easy fusion of the also unburned coal of powdered is cohered block or is cohered on the wall of combustion channels in the burning coal process.Form blocky coal one and influence clean-burning effect, two become blocky cinder after burning, forming blast when not only causing deslagging impacts, the work-ing life of harm boiler and harm stoker personnel's safety, two come fusion agglutinating coal ash to cohere easily on furnace wall and tube wall, influence the heat conduction efficiency of boiler, even stop up ventilation system, influence boiler operatiopn.And, there is sulfidic material in the coal in various degree, under high-temp combustion, produce sulfur oxide, because coal all has a certain amount of moisture, these moisture must form dewdrop in the low-temperature end of boiler, the water of sulfur oxide and dewdrop shape is combined into strong acid, makes the easier dust stratification of low-temperature end of boiler, more is easy to generate acid corrosion.Prior art such as patent " 01114877.2 " are though disclose a kind of anti-scorch, the composition of anticorrosion dust-cleaning agent and component concentration thereof, this is anti-scorch, anticorrosion dust-cleaning agent has also been brought into play good effect in the general coal of burning, but, effect in the metabolic water coal slurry but is not clearly, because coal water slurry is generally obtained through handling by cleaned coal, sulphur content in the coal is lower, water content is big, if use the anti-scorch of patent " 01114877.2 ", the amount of anticorrosion dust-cleaning agent is too big, whole combustion system can be alkalescence, can reduce the fusing point of coal on the contrary, causes coking, if consumption is few, do not have anti-scorch again, the effect of anticorrosion deashing.
Goal of the invention of the present invention be to provide a kind of can prevent coal water slurry under high-temp combustion fusion agglutinating coal burning with anti-scorch, anticorrosion dust-cleaning agent.
Coal burning of the present invention is achieved in that mainly with anti-scorch, anticorrosion dust-cleaning agent and is made of calcium hydroxide slag and powdered graphite after the drying that mixes, the pulverizing that the content of graphite is 45-95%.
During use, with coal burning with anti-scorch, anticorrosion dust-cleaning agent adds in the coal water slurry by the amount of setting and mixes, send to boiler combustion then, because appropriate low sodium calcium hydroxide can improve the fusing point of the cinder after coal and the burning thereof, calcium hydroxide and sulfur oxide are combined into neutral salt, the graphite of capacity then plays lubricated and disperses, chemically-resistant, high temperature resistant effect, promptly lower the frictional coefficient of the coal particle in the coal water slurry, prevent that the coal particle in the coal water slurry is bonded together, therefore, prevented that effectively the cinder fusion at high temperature after coal dust and the burning is bonded together, make cinder loose, prevented of the corrosion of low-temperature end sulfur oxide to boiler plant, prevented the appearance of low-temperature end fouling phenomenon, the blast that has been caused when having reduced deslagging impacts, and has guaranteed stoker personnel's safety, prolong the work-ing life of boiler, guaranteed boiler safety, economical operation.In addition, enough graphite can promote the flowing property of coal water slurry, prevents the coal water slurry layering, guarantees the coal water slurry sludge forming performance.
Compared with the prior art the present invention has the flowing property that can promote coal water slurry, prevents that coal water slurry fusion under high-temp combustion from cohering and prevent the corrosion of low-temperature end sulfur oxide and the advantage of dust stratification.
Now in conjunction with the accompanying drawings and embodiments the present invention is described in further detail:
Coal burning of the present invention is to realize like this with anti-scorch, anticorrosion dust-cleaning agent, mainly constitute by calcium hydroxide slag and powdered graphite after the drying that mixes, the pulverizing, wherein to account for the ratio of total content can be 45% to the content of graphite, also can be 70%, also can be 95%.
Following table is that prior art and present technique use the effect in coal water slurry to compare:
| Content of graphite (%) | ??20％ | ??30％ | 40％ | 45％ | ??70％ | ??95％ |
| The coking situation | Seriously | Seriously | Often | Almost do not have | No | No |
| The dust stratification situation | Seriously | Seriously | Often | Almost do not have | No | No |
| Efficiency of combustion | Very low | Very low | Low | Good | Fine | Fine |
Claims (1)
1, a kind of coal burning is characterized in that mainly being made of calcium hydroxide slag and powdered graphite after the drying that mixes, the pulverizing with anti-scorch, anticorrosion, dust-cleaning agent, and the content of graphite is 45---and 95%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410026749 CN1232619C (en) | 2004-04-02 | 2004-04-02 | Deashing agent in use for burning of coal for preventing charing and rotting away |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410026749 CN1232619C (en) | 2004-04-02 | 2004-04-02 | Deashing agent in use for burning of coal for preventing charing and rotting away |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1563298A true CN1563298A (en) | 2005-01-12 |
| CN1232619C CN1232619C (en) | 2005-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410026749 Expired - Fee Related CN1232619C (en) | 2004-04-02 | 2004-04-02 | Deashing agent in use for burning of coal for preventing charing and rotting away |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1232619C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108384597A (en) * | 2018-02-06 | 2018-08-10 | 武汉凯迪绿色能源开发运营有限公司 | Biomass recirculating fluidized bed boiler anti-coking additive and its preparation and application method |
-
2004
- 2004-04-02 CN CN 200410026749 patent/CN1232619C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108384597A (en) * | 2018-02-06 | 2018-08-10 | 武汉凯迪绿色能源开发运营有限公司 | Biomass recirculating fluidized bed boiler anti-coking additive and its preparation and application method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1232619C (en) | 2005-12-21 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051221 Termination date: 20110402 |