CN110665161A - Manufacturing process of fire extinguishing agent for coal field - Google Patents
Manufacturing process of fire extinguishing agent for coal field Download PDFInfo
- Publication number
- CN110665161A CN110665161A CN201911067447.XA CN201911067447A CN110665161A CN 110665161 A CN110665161 A CN 110665161A CN 201911067447 A CN201911067447 A CN 201911067447A CN 110665161 A CN110665161 A CN 110665161A
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- Prior art keywords
- fire extinguishing
- slag
- desulfurized gypsum
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- coal field
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Classifications
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the technical field of coal field fire extinguishing agents, in particular to a manufacturing process of a coal field fire extinguishing agent, which comprises the following raw materials, by weight, 25-40 parts of fly ash, 15-30 parts of desulfurized gypsum, 10-20 parts of carbide slag, 2-5 parts of a high-efficiency dispersing agent and 10-20 parts of water. Meanwhile, the industrial solid waste material is used for replacing and destroying ecological soil taking, the environmental protection benefit is obvious, the fire extinguishing cost is low and the effect is good by utilizing the industrial solid waste material slurry, and the method has remarkable social benefit for treating the fire area of the Xinjiang coal field.
Description
Technical Field
The invention relates to the technical field of coal field fire extinguishing agents, in particular to a manufacturing process of a coal field fire extinguishing agent.
Background
In the process of geological historical development, coal-bearing rock series distribution areas formed in the same geological period and approximately continuously developed are called coal fields. Most coal fields are in basin shapes, so the coal fields are also called as coal basins, the coal fields are easy to self-ignite in the mining process, so that fire extinguishing agents are needed, and the grouting materials in the existing coal field fire extinguishing engineering are mainly three types: common grout, foamed grout and composite grout.
The common slurry is a mixture of loess and water, the loess has wide source and low cost, but because of the factors of strong water loss of the loess, large particle distance and the like, the water is quickly evaporated after entering a fire zone of a coal field, the slurry can not go deep into cracks of the fire zone and is dried, and meanwhile, a stable isolation layer can not be formed on the surface of the spontaneous combustion coal after the loess is dried, so that the reburning rate of most fire zones adopting the fire extinguishing material is high. With the soundness of national soil laws and regulations, the difficulty of examining and approving projects such as soil taking, excavation and the like is large, and the quantity of land recovery projects is huge, so that the influence of ecological environment damage is long-term;
the foamed cement slurry mainly comprises water and cement, and is prepared according to the test data of a fire extinguishing construction site: the water-cement ratio is 1:1, and each 1m3The slurry needs about 0.7m of water and the foamed cement is about 0.54t, so that the cement-coal-mortar fire extinguishing effect is good, but the raw materials are few in obtaining way, the cost is relatively high, the proper amount of the slurry is difficult to use, and the slurry is mostly used in a short amount, so that the fire extinguishing effect is not ideal;
the composite slurry is a grouting material with the best use effect at present, meets various requirements of fire extinguishing in a coal field, has strong adaptability, but is expensive and difficult to popularize and use in a large number of areas;
in order to solve the problems, a process for preparing the fire extinguishing agent for the coal field is provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a manufacturing process of a coal field fire extinguishing agent, which has the advantages of good filling property, good fluidity, long drying time, large attachment surface area, capability of inhibiting and reducing waste gas dissipation generated by spontaneous combustion of a coal field, low cost and the like, and solves the problem of poor practicability of the existing fire extinguishing agent.
(II) technical scheme
1. In order to achieve the purpose, the invention provides the following technical scheme: the coal field fire extinguishing agent is prepared from (by weight parts) fly ash 25-40, desulfurized gypsum 15-30, carbide slag 10-20, high-efficiency dispersant 2-5, and water 10-20;
the coal field fire extinguishing agent is prepared by the following process steps:
step (1): screening the desulfurized gypsum and the furnace slag by a screening machine;
step (2): collecting the screened small-particle desulfurized gypsum and the screened slag, and putting the collected small-particle desulfurized gypsum and the screened slag into a warehouse for later use;
and (3): collecting the desulfurized gypsum and the slag which do not fall down during screening, grinding the desulfurized gypsum and the slag by using a high-pressure grinding machine, and putting the ground desulfurized gypsum and the slag into a storage for later use;
and (4): weighing the required materials according to a proportion, and then feeding the materials into a proportioning bin through a belt;
and (5): the materials in the proportioning bins enter a pulping machine through a belt, then water and a high-efficiency dispersing agent are injected according to the temperature and geological conditions of a fire extinguishing area, and then the materials are uniformly stirred by a mechanical stirrer.
Preferably, the screen used for screening the desulfurized gypsum and the slag in the step (1) is a 3-mesh screen.
Preferably, the diameter of the desulfurized gypsum and the slag after the grinding by the high-pressure grinding machine in the step (3) is not more than 5 mm.
(III) advantageous effects
Compared with the prior art, the invention provides a manufacturing process of a coal field fire extinguishing agent, which has the following beneficial effects:
the invention has the advantages of good filling property, good fluidity, long drying time, large attachment surface area, capability of inhibiting and reducing waste gas dissipation generated by spontaneous combustion of the coal field, low cost and the like, utilizes the industrial solid waste material for treating the fire area of the coal field, is comprehensive utilization of common industrial solid waste, has high utilization efficiency and obvious effect, and can solidify sulfur dioxide and nitrogen oxide generated by coal combustion to reduce direct emission of pollutants generated by coal combustion when the industrial solid waste material is used for extinguishing fire. Meanwhile, the industrial solid waste material is used for replacing and destroying ecological soil taking, the environmental protection benefit is obvious, the fire extinguishing cost is low and the effect is good by utilizing the industrial solid waste material slurry, and the fire extinguishing agent has remarkable social benefit and economic benefit for treating the fire area of the Xinjiang coal field.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The coal field fire extinguishing agent is prepared from (by weight parts) fly ash 25-40, desulfurized gypsum 15-30, carbide slag 10-20, high-efficiency dispersant 2-5, and water 10-20;
the coal field fire extinguishing agent is prepared by the following process steps:
step (1): screening the desulfurized gypsum and the furnace slag by a screening machine;
step (2): collecting the screened small-particle desulfurized gypsum and the screened slag, and putting the collected small-particle desulfurized gypsum and the screened slag into a warehouse for later use;
and (3): collecting the desulfurized gypsum and the slag which do not fall down during screening, grinding the desulfurized gypsum and the slag by using a high-pressure grinding machine, and putting the ground desulfurized gypsum and the slag into a storage for later use;
and (4): weighing the required materials according to a proportion, and then feeding the materials into a proportioning bin through a belt;
and (5): the materials in the proportioning bins enter a pulping machine through a belt, then water and a high-efficiency dispersing agent are injected according to the temperature and geological conditions of a fire extinguishing area, and then the materials are uniformly stirred by a mechanical stirrer.
The first embodiment is as follows:
screening the desulfurized gypsum and the furnace slag by a screening machine; collecting the screened small-particle desulfurized gypsum and the screened slag, and putting the collected small-particle desulfurized gypsum and the screened slag into a warehouse for later use, wherein a screen used for screening the desulfurized gypsum and the screened slag is a 3-mesh screen; collecting the desulfurized gypsum and the slag which do not fall off during the screening process, grinding the desulfurized gypsum and the slag by using a high-pressure grinding machine, putting the grinded desulfurized gypsum and the slag into a storage for later use, and grinding the desulfurized gypsum by using the high-pressure grinding machineAnd the diameter of the slag is not more than 5 mm; weighing the required materials according to the proportion, and then feeding the materials into a proportioning bin through a belt; finally, the materials in the proportioning bin are put into a pulping machine through a belt, then water and a high-efficiency dispersant are injected according to the temperature and geological conditions of a fire extinguishing area, and the materials are uniformly stirred by a mechanical stirrer, wherein the fly ash mainly comprises active SiO2 and Al2O3, when water exists at normal temperature, the fly ash can chemically react with alkaline substances in the materials to generate hydration products with gelling property, mainly calcium silicate hydrate and calcium aluminate hydrate gel, the hydration products can be generally hardened in the air and then gradually have strength and quite high anti-permeability, the hydration products cover the surface of the spontaneous combustion coal to effectively isolate the air so as to achieve the purpose of flame retardance, the activity of the fly ash is potential and often needs to be excited, the alkaline components in industrial solid waste materials are good exciting agents, the fire extinguishing is firstly cooled by the water in slurry, and secondly, Ca (OH) in the industrial solid waste materials is used2、CaSO3、Ca(HCO3)2The coal is burnt to generate SO under the effects of adhesion, wrapping and oxygen insulation on the self-burning coal2、SO3、H2S、CO2Iso-acid gas, Ca (OH)2、CaSO3、Ca(HCO3)2Etc. can absorb and neutralize these acid gases to produce CaSO3、CaSO4、CaCO3And the reaction product can form a solidified body with the spontaneous combustion coal, and has a flame retardant effect on a spontaneous combustion coal area. .
It should be noted that: main chemical component Ca (OH) in industrial solid waste material2、CaSO3、Ca(HCO3)2SO released by combustion of coal and main alkaline substances2、SO3、CO2The reaction occurs as follows:
SO2+Ca(OH)2=CaSO3+H2O
SO3+Ca(OH)2=CaSO4+H2O
CO2+Ca(OH)2=CaCO3+H2O
Ca(HCO3)2+SO2=CaSO3+2CO2+H2O
SO2+H2O+CaSO3=Ca(HSO3)2
CO2+H2O+CaCO3=Ca(HCO3)2
CaSO3、CaSO4with CaCO3The solid substances cover the surface of the gangue, so that the air can be isolated, the aim of isolating oxygen is fulfilled, and the spontaneous combustion of coal is prevented.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A manufacturing process of a coal field fire extinguishing agent is characterized in that: the raw materials and the weight ratio of the coal field fire extinguishing agent are 25-40 parts of fly ash, 15-30 parts of desulfurized gypsum, 10-20 parts of carbide slag, 2-5 parts of high-efficiency dispersant and 10-20 parts of water;
the coal field fire extinguishing agent is prepared by the following process steps:
step (1): screening the desulfurized gypsum and the furnace slag by a screening machine;
step (2): collecting the screened small-particle desulfurized gypsum and the screened slag, and putting the collected small-particle desulfurized gypsum and the screened slag into a warehouse for later use;
and (3): collecting the desulfurized gypsum and the slag which do not fall down during screening, grinding the desulfurized gypsum and the slag by using a high-pressure grinding machine, and putting the ground desulfurized gypsum and the slag into a storage for later use;
and (4): weighing the required materials according to a proportion, and then feeding the materials into a proportioning bin through a belt;
and (5): the materials in the proportioning bins enter a pulping machine through a belt, then water and a high-efficiency dispersing agent are injected according to the temperature and geological conditions of a fire extinguishing area, and then the materials are uniformly stirred by a mechanical stirrer.
2. The process for manufacturing the coal field fire extinguishing agent according to claim 1, wherein: and (2) the screen mesh used for screening the desulfurized gypsum and the slag in the step (1) is a 3-mesh screen mesh.
3. The process for manufacturing the coal field fire extinguishing agent according to claim 1, wherein: and (4) the diameters of the desulfurized gypsum and the slag ground by the high-pressure grinding machine in the step (3) are not more than 5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911067447.XA CN110665161A (en) | 2019-11-04 | 2019-11-04 | Manufacturing process of fire extinguishing agent for coal field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911067447.XA CN110665161A (en) | 2019-11-04 | 2019-11-04 | Manufacturing process of fire extinguishing agent for coal field |
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| Publication Number | Publication Date |
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| CN110665161A true CN110665161A (en) | 2020-01-10 |
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| CN201911067447.XA Pending CN110665161A (en) | 2019-11-04 | 2019-11-04 | Manufacturing process of fire extinguishing agent for coal field |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111233426A (en) * | 2020-03-24 | 2020-06-05 | 内蒙古科技大学 | Novel guniting material for inhibiting spontaneous combustion of gangue dump and application method thereof |
| CN113813526A (en) * | 2021-09-16 | 2021-12-21 | 乌海市东孚水泥有限责任公司 | Special material for coal gangue dump grouting fire extinguishing, preparation method thereof and fire extinguishing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111233426A (en) * | 2020-03-24 | 2020-06-05 | 内蒙古科技大学 | Novel guniting material for inhibiting spontaneous combustion of gangue dump and application method thereof |
| CN113813526A (en) * | 2021-09-16 | 2021-12-21 | 乌海市东孚水泥有限责任公司 | Special material for coal gangue dump grouting fire extinguishing, preparation method thereof and fire extinguishing method |
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