CN107267251B - Boiler anti-contamination additive and preparation and application thereof - Google Patents
Boiler anti-contamination additive and preparation and application thereof Download PDFInfo
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- CN107267251B CN107267251B CN201710463393.3A CN201710463393A CN107267251B CN 107267251 B CN107267251 B CN 107267251B CN 201710463393 A CN201710463393 A CN 201710463393A CN 107267251 B CN107267251 B CN 107267251B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/10—Treating solid fuels to improve their combustion by using additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2200/00—Components of fuel compositions
- C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
- C10L2200/0204—Metals or alloys
- C10L2200/0218—Group III metals: Sc, Y, Al, Ga, In, Tl
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2200/00—Components of fuel compositions
- C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
- C10L2200/0204—Metals or alloys
- C10L2200/0227—Group V metals: V, Nb, Ta, As, Sb, Bi
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2200/00—Components of fuel compositions
- C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
- C10L2200/0204—Metals or alloys
- C10L2200/0231—Group VI metals: Cr, Mo, W, Po
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2200/00—Components of fuel compositions
- C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
- C10L2200/0204—Metals or alloys
- C10L2200/0236—Group VII metals: Mn, To, Re
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2200/00—Components of fuel compositions
- C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
- C10L2200/0204—Metals or alloys
- C10L2200/024—Group VIII metals: Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention relates to a boiler anti-contamination additive, and a preparation method and an application thereof, wherein the additive comprises the following components in parts by weight: 15-25 parts of tungsten ore; 10-20 parts of coal gangue; 20-30 parts of bauxite; 5-15 parts of chromite; 25-35 parts of sand and stone. Compared with the prior art, the invention can effectively improve the ash melting point of the easily-contaminated fuel without changing the structure and the operation condition of the boiler, reduce the cohesiveness of the easily-contaminated fuel, obviously reduce the problems of slag bonding and ash deposition of the easily-contaminated fuel boiler for combustion, enhance the heat transfer effect of the heat exchange tube, reduce the smoke discharge loss of the boiler and improve the boiler efficiency; the ventilation power consumption is reduced, and the service power is saved; the risk that the normal operation of steam and water in the heating surface is influenced by the slag is effectively reduced, and the overheating and pipe explosion of the steam and water pipe are prevented; the corrosion of the slagging to the metal pipe wall is reduced. The invention aims at solving the problems of slag bonding and dust accumulation of fuels easy to contaminate and expands the application range of the boiler to the fuels easy to contaminate.
Description
Technical Field
The invention relates to the technical field of boilers, in particular to a boiler anti-contamination additive and preparation and application thereof.
Background
The energy structure of more coal, less gas and poor oil determines that coal is still the leading energy of China for a long time in the future. The thermal power plant is undoubtedly a large coal consumer, a considerable part of the thermal power plant is low-rank coal, and when the boiler burns the low-rank coal, serious ash accumulation and slag bonding are easily caused. As the ash has much higher thermal resistance than the metal wall, the heat transfer effect is reduced, the boiler smoke discharge loss is increased, the boiler efficiency is reduced, and the ventilation power consumption is increased. Meanwhile, the slag bonding has locality, so that the normal operation of steam and water inside the heating surface is influenced. Serious slag bonding can block a flue gas channel and a slag discharge port of a hearth, overheat a steam-water pipe and explode the pipe, and damage the continuous operation of equipment. Slagging also contributes to metal corrosion. In order to remove the slag, the boiler has to be shut down for maintenance frequently, the boiler is shut down for maintenance once every 3 months in short time, and the boiler is shut down for maintenance once every 6 months in long time, so that the continuous operation time of the boiler is greatly shortened, and huge economic loss is caused. Some boilers are also forced to operate at low loads for long periods of time to prevent slagging. Therefore, the ash deposition and slag bonding seriously affect the availability, output and safety of the boiler, and bring huge economic loss. Therefore, on the premise of not changing the structure and the operation condition of the boiler, it is very important to find a high-efficiency, energy-saving, low-cost and strong-adaptability boiler anti-pollution additive.
At present, the anti-contamination additive is various in types, and can be divided into 3 types according to the main components of the additive: the anti-pollution additive taking kaolin as the main component, such as patent CN 102786998A, CN 104371790A, CN 104327903A, has good effect, but has large dosage, high transportation cost, slow effect and poor fuel adaptability, and the combined water evaporation and heat absorption of the kaolin can reduce the boiler efficiency; with Cr2O3Chromium-based anti-contamination additives with an oxidant and an adsorbent as main components, such as patent CN 104845698A, CN 104910996A, CN 103060051A, have quick response, but general effect and poor fuel adaptability, so the method is difficult to popularize; with Al2O3Pure substance and SiO2Pure substance-based oxide anti-contamination additives, such as patent CN 104371789A, CN 104745270A, CN 104164270 a, have good effects but high raw material cost and poor fuel adaptability. Although the three anti-contamination additives have advantages, the application range of the anti-contamination additives is greatly limited due to the disadvantages of large dosage, high transportation cost, slow effect and poor fuel adaptability, and the anti-contamination additives are difficult to popularize in the true sense. So as to research and develop a high-efficiency energy-saving, low-cost and strong-adaptability boilerAnti-soiling additives are of great importance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the boiler anti-pollution additive which is high in efficiency, energy-saving, low in cost and strong in adaptability, and the preparation and the application thereof.
The purpose of the invention can be realized by the following technical scheme: the boiler anti-contamination additive is characterized by comprising the following components in parts by weight:
in the above-mentioned ore, the tungsten ore contains MnWO4，MnWO4The anti-contamination effect is excellent, high-melting-point tungsten compounds are formed by combining with part of inorganic elements in ash at high temperature, the ash component is improved, the ash melting point is obviously improved, and the adaptability of coal types is excellent; the main component of the coal gangue is Al2O3、SiO2(ii) a Bauxite contains Al as the main component2O3，Al3(SiO3)3(ii) a The main component in the sand stone is SiO2；Al2O3、SiO2、Al3(SiO3)3The method has the advantages that the method shows good alkali metal conversion rate, can convert alkali metal into stable alkali metal aluminosilicate, and effectively reduces alkali metal corrosion and alkali metal contamination; the chromite contains Cr2O3The substance has an auxiliary effect and promotes the coke slag after the reaction to be changed into a crystalline state from a glass state, so that the ash content is further quickly formed, and the flowing coke slag is prevented from polluting a boiler.
Preferably, the sand comprises one or more of gneiss, sea sand, river sand or desert sand.
Preferably, the additive can also comprise 1-5 parts of pyrolusite. Abundant MnO in pyrolusite2，MnO2The catalyst is used for catalyzing the anti-contamination reaction, so that the reaction rate is improved, the anti-contamination effect is stabilized, and the coal adaptability is improved.
A preparation method of the boiler anti-contamination additive comprises the following steps: the boiler anti-contamination additive is obtained by crushing the components and then uniformly mixing the components in parts by weight.
The components are crushed to a particle size of less than 200 μm.
The application of the boiler anti-contamination additive prepared by the preparation method is used for resisting contamination of a pulverized coal boiler or a fluidized bed boiler.
When the boiler is a pulverized coal boiler, the application comprises the following steps: the prepared additive and the fire coal are sent into a coal mill to be crushed and mixed, the obtained mixture is separated by a coarse powder separator and a fine powder separator in sequence, and then is stored and sent into a pulverized coal boiler through a powder feeding fan when in use.
When the boiler is a fluidized bed boiler, the application comprises the steps of: the prepared additive and desulfurizer powder are mixed and stored, and then are sent into a fluidized bed boiler through a powder feeding fan.
When the additive is applied, the weight ratio of the fuel to the additive in the pulverized coal fired boiler or the fluidized bed boiler is 100: (0.1 to 3).
Compared with the prior art, the beneficial effects of the invention are embodied in the following aspects:
(1) the formula of the invention adopts easily available ore raw materials, has low cost and better anti-contamination effect and coal adaptability;
(2) simple preparation, simple application and wide application prospect.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
Example 1
The preparation of the boiler anti-contamination additive of the invention comprises the following steps: the anti-contamination additive is prepared from 20 parts by mass of tungsten ore, 15 parts by mass of coal gangue, 25 parts by mass of bauxite, 10 parts by mass of chromite, 20 parts by mass of gnetite, 10 parts by mass of desert sand and 3 parts by mass of pyrolusite.
The preparation method comprises the following steps: the preparation method comprises the steps of crushing the components to the maximum particle size of less than 200 mu m, and then uniformly mixing the components in parts by mass.
The application method of the anti-staining additive comprises the following steps:
mixing the prepared additive and desulfurizer powder, storing the mixture in a desulfurizer bin, and finally feeding the mixture into a fluidized bed under the action of conveying air.
The using amount of the boiler anti-contamination additive is as follows: the mass ratio of the additive to the boiler fuel is 0.3: 100.
The anti-contamination additive for the boiler provided by the embodiment is applied to a circulating fluidized bed boiler of a 135MW bituminous rock power station, and the result shows that under the condition that the boiler system normally operates through long-time operation monitoring: the ash content is 90% in the form of alkali metal aluminosilicate, the measured ash melting point is 1475 ℃, the problems of ash deposition, slag bonding and heat exchange surface corrosion caused by alkali steam are reduced, the utilization efficiency of equipment is improved, and the service life of a boiler is prolonged. And the continuous operation time of the boiler reaches 258 days, and all operation data of the boiler are normal and stable.
Example 2
A formulation similar to example 1, preparation and application methods were used, except that:
(1) the weight parts of the components are as follows: 25 parts of tungsten ore, 10 parts of coal gangue, 30 parts of bauxite, 15 parts of chromite, 35 parts of sea sand and 5 parts of pyrolusite.
(2) The mass ratio of the additive to the boiler fuel is 3: 100.
Through practical tests, the ash content is 92% in the form of alkali metal aluminosilicate, the measured ash melting point is 1501 ℃, the problems of ash deposition, slag bonding and heat exchange surface corrosion caused by alkali steam are also reduced, the utilization efficiency of equipment is improved, and the service life of a boiler is prolonged. The continuous operation time of the boiler reaches 269 days, and all the operation data of the boiler are normal and stable.
Example 3
A formulation and preparation similar to example 1 was used, except that:
(1) the weight parts of the components are as follows: 15 parts of tungsten ore, 20 parts of coal gangue, 20 parts of bauxite, 5 parts of chromite, 25 parts of river sand and 1 part of pyrolusite.
(2) The additive obtained in the embodiment is used for a certain 350MW lignite boiler, and the mass ratio of the additive to the boiler fuel is 0.1: 100.
(3) The application method comprises the following steps: the prepared additive and the fire coal are sent into a coal mill to be crushed and mixed, the obtained mixture is separated by a coarse powder separator and a fine powder separator in sequence, and then is stored in a coal storage bin and is sent into a pulverized coal boiler through a powder feeding fan when in use.
Through practical tests, the ash content is 88% in the form of alkali metal aluminosilicate, the ash melting point is 1463 ℃, the problems of ash deposition, slagging and heat exchange surface corrosion caused by alkali steam are also reduced, the utilization efficiency of equipment is improved, and the service life of a boiler is prolonged. The continuous operation time of the boiler reaches 240 days, and all operation data of the boiler are normally stable.
Claims (8)
1. The boiler anti-contamination additive is characterized by comprising the following components in parts by weight:
15-25 parts of tungsten ore;
10-20 parts of coal gangue;
20-30 parts of bauxite;
5-15 parts of chromite;
25-35 parts of sand and stone;
1-5 parts of pyrolusite;
the tungsten ore contains MnWO4。
2. The boiler anti-contamination additive according to claim 1, wherein the sand comprises one or more of gneiss, sea sand, river sand or desert sand.
3. A method for preparing the boiler anti-contamination additive according to any one of claims 1 to 2, wherein the preparation method comprises the steps of: the boiler anti-contamination additive is obtained by crushing the components and then uniformly mixing the components in parts by weight.
4. The method of claim 3, wherein the components are pulverized to a particle size of less than 200 μm.
5. Use of an additive according to any of claims 1 to 2 for anti-fouling of a pulverized coal fired boiler or a fluidized bed boiler.
6. The use of a boiler anti-fouling additive according to claim 5, wherein, when the boiler is a pulverized coal boiler, the use comprises the steps of: the prepared additive and the fire coal are sent into a coal mill to be crushed and mixed, the obtained mixture is separated by a coarse powder separator and a fine powder separator in sequence, and then is stored and sent into a pulverized coal boiler through a powder feeding fan when in use.
7. The use of a boiler anti-fouling additive according to claim 5, wherein, when the boiler is a fluidized bed boiler, the use comprises the steps of: the prepared additive and desulfurizer powder are mixed and stored, and then are sent into a fluidized bed boiler through a powder feeding fan.
8. The use of a boiler anti-fouling additive according to claim 5, wherein the weight ratio of fuel to additive in the pulverized coal fired boiler or fluidized bed boiler is 100: (0.1 to 3).
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| CN201710463393.3A CN107267251B (en) | 2017-06-19 | 2017-06-19 | Boiler anti-contamination additive and preparation and application thereof |
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| CN107267251B true CN107267251B (en) | 2020-07-24 |
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| 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 |
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| CN101475864A (en) * | 2009-01-19 | 2009-07-08 | 赵楠 | Non-sodium chloride environment-friendly type coal-saving combustion adjuvant special for cement |
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| CN103627468A (en) * | 2013-07-31 | 2014-03-12 | 陈方 | Novel decoking agent for fire coal |
| CN105132075A (en) * | 2015-08-14 | 2015-12-09 | 上海理工大学 | Eastern Junggar coal slagging and contamination improvement additive and application method thereof |
| CN106190430A (en) * | 2016-08-24 | 2016-12-07 | 郴州回康科技有限责任公司 | A kind of desulphurization denitration combustion adjuvant and the application in fire coal thereof |
| CN106635242A (en) * | 2016-12-07 | 2017-05-10 | 江西稀有金属钨业控股集团有限公司 | Method and device for utilizing scheelite concentrate smelting slag and application of scheelite concentrate smelting slag |
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2017
- 2017-06-19 CN CN201710463393.3A patent/CN107267251B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475864A (en) * | 2009-01-19 | 2009-07-08 | 赵楠 | Non-sodium chloride environment-friendly type coal-saving combustion adjuvant special for cement |
| CN102585966A (en) * | 2012-03-07 | 2012-07-18 | 哈尔滨巨龙节能设备经销有限责任公司 | Combustion-supporting decoking coal saving agent |
| CN103627468A (en) * | 2013-07-31 | 2014-03-12 | 陈方 | Novel decoking agent for fire coal |
| CN105132075A (en) * | 2015-08-14 | 2015-12-09 | 上海理工大学 | Eastern Junggar coal slagging and contamination improvement additive and application method thereof |
| CN106190430A (en) * | 2016-08-24 | 2016-12-07 | 郴州回康科技有限责任公司 | A kind of desulphurization denitration combustion adjuvant and the application in fire coal thereof |
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