CN111250021A - Environment-friendly fine coal chemical deashing equipment and method - Google Patents
Environment-friendly fine coal chemical deashing equipment and method Download PDFInfo
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- CN111250021A CN111250021A CN202010075765.7A CN202010075765A CN111250021A CN 111250021 A CN111250021 A CN 111250021A CN 202010075765 A CN202010075765 A CN 202010075765A CN 111250021 A CN111250021 A CN 111250021A
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
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- 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
- C10L9/02—Treating solid fuels to improve their combustion by chemical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
- B01J2219/00099—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor the reactor being immersed in the heat exchange medium
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Abstract
An environment-friendly fine coal chemical deliming device and a method, which are particularly suitable for deliming high-ash fine coal in coal mine enterprises. Comprises a deliming system, a heating system and a separation and recovery system which are sequentially connected through pipelines; adding fine coal into a deliming reactor, adding a deliming agent, starting stirring, setting a heating temperature, recovering generated volatile gas through a gas recovery device, heating by a water bath heater switch, and extracting and separating the delimed coal and the reaction agent through a pipeline to obtain coal and reacted liquid. The system has the advantages of good separation effect on coal or medium coal byproducts with extremely poor selectivity, difficult corrosion of equipment, simple structure, high deliming efficiency, good use effect, reaction agent consumption saving, timely recovery when volatile acid or alkali is used, and effective reduction of pollution to operators and environment.
Description
Technical Field
The invention relates to environment-friendly fine coal chemical deliming equipment and a method, in particular to environment-friendly fine coal chemical deliming equipment and a method which are used for high-ash fine coal deliming in coal mine enterprises.
Background
At present, along with the expansion of the coal market in China, the ash content of coal, including fat coal, coking coal, lean coal, anthracite and other scarce coal types, is higher and higher, and the high-end clean coal resource is more and more important. The coking coal and fat coal resources only account for about 9 percent of the coal resources in China and account for about 1 percent of the coal resources in the world, and besides the coking coal and fat coal, the high-quality anthracite presents a growing trend due to the requirement of the steel industry on injected coal and is strongly supported by the development of the modern coal chemical industry, so that the scarcity of the high-quality anthracite is more and more shown in the future and is classified as a special and scarcity coal type. Domestic coking coal resources cannot meet the requirements of the steel industry, so that the import quantity of coking coal increases year by year, 6490 million tons of coking coal are imported all the year round in 2018, and the coking coal becomes a cost problem which has to be looked right by steel enterprises after iron ores. The ash content in the high-ash coal is difficult to be thoroughly separated by traditional physical methods such as dissociation, flotation and the like in China, the research on the coal deliming technology which is extremely difficult to select and is used in the beginning is the best choice for reasonably utilizing the limited coal resources, and the method has important significance for promoting the refined development of the coal selection technology in China.
The coal ash reduction technology mainly comprises physical separation, chemical separation and biological separation, and due to the fact that the cost is relatively low and the process is simple, the physical separation method is adopted for mainstream coal separation, but the separation effect on coal types with poor selectivity or coal byproducts and the like is poor. The chemical treatment method mainly comprises an acid mode and a basic mode, and in any mode, coal and a medicament need to react under a certain temperature condition to remove ash in the coal. There is no special equipment for chemical coal dressing and deliming in the market, many research units and enterprises adopt conventional chemical equipment for testing or production, the equipment corrosion is severe, and when volatile acid or alkali is used for testing, the medicament is volatilized, leaked and the like, which may cause damage to the equipment and workers.
Therefore, it is necessary to invent a device which can be used in a laboratory and can be expanded for industrial production. Reduce the consumption of reaction medicament and the consumption of the reaction medicament to operators, environment and equipment.
Disclosure of Invention
Aiming at the defects of the prior art, the environment-friendly fine coal chemical deliming equipment and method which are simple in structure, good in deliming effect, safe and environment-friendly are provided.
In order to achieve the technical purpose, the environment-friendly fine coal chemical deliming equipment comprises a deliming system, a heating system and a separation and recovery system which are sequentially connected through pipelines;
the deashing system comprises a deashing reactor, the deashing reactor is a cylindrical container with a hemispherical structure at the bottom, a stirring motor is arranged at the center of the top circle of the deashing reactor, a material feeding device controlled by a switch is arranged at one side of the deashing reactor, a temperature controller extending into the deashing reactor is arranged at the other side of the deashing reactor, the temperature controller consists of an external jacket and a resistance temperature measuring rod, wherein an output shaft of the stirring motor is connected with a stirring rod extending into the deashing reactor, a stirring impeller is arranged at the end of the stirring rod, and a liquid level meter for displaying the position of internal liquid is arranged at the outer side of the deashing reactor;
the heating system comprises a water bath heater arranged outside the deliming reactor, a supporting frame for supporting the deliming reactor to be suspended is arranged at the bottom and the side wall in the water bath heater, a temperature control heater is arranged at the bottom of the deliming reactor, a water inlet is arranged on one side of the top of the water bath heater, and a water outlet is arranged on one side of the bottom of the water bath heater;
the separation and recovery system comprises a centrifugal machine, a gas collector and a fan, wherein an inlet of the centrifugal machine is connected with the bottom of the deliming reactor through a pipeline, the gas collector is connected with the upper part of one side of the deliming reactor through a pipeline, and the fan generating suction is arranged in the pipeline.
The ash removal reactor, the temperature control jacket, the connecting pipeline and the gas recoverer are all made of polytetrafluoroethylene or tetrafluoroethylene linings, and the centrifugal machine impeller and the ash removal reactor are made of Monel alloy.
An environment-friendly fine coal chemical deashing method comprises the following steps:
a. when the device is used, the water outlet is closed, water is injected into the water bath heating device through the water inlet until the water bath heating device is full, the switch of the material feeder is opened, fine coal with proper granularity is added into the deliming reactor through the material feeder, the switch of the material feeder is closed after the deliming agent is added, the stirring motor is started to drive the stirring rod to rotate, then the heating temperature is set through the temperature controller, and the switch of the water bath heater is opened for heating;
b. in the heating process, keeping the gas recovery device full of water, recovering the generated volatile gas through the gas recovery device, observing the liquid level height in the deliming reactor through a liquid level meter to detect the deliming process and abnormal phenomena, immediately stopping heating and discharging materials if the liquid level is observed to rise too fast to exceed the capacity of the reactor, and checking whether the reaction liquid is mismatched and whether the reaction temperature is too high;
c. after the reaction is finished, a switch of the material feeder is turned on, a fan is started at the same time, volatile gas in the deliming reactor is prevented from being dissipated, a centrifugal machine is turned on, and delimed coal and a reaction agent are extracted and separated through a pipeline to obtain coal and reacted liquid;
d. and after separation, the water bath heater is closed, the stirring motor is stopped, water is sprayed into the deliming reactor for washing through the feeding port, then the pipeline is opened to clean the centrifuge, the fan is closed after the washing is finished, and finally the boiling water port is opened for draining water.
4. The deliming process of claim 3, wherein: the used fine-grained coal is high-ash fine-grained coal, the ash content is about 40 percent, and the coal is crushed to be less than 3 mm.
The deliming agent is 20% hydrofluoric acid added according to the solid-liquid ratio of 1: 3-5,
the temperature controller is set to 40-60 ℃, the temperature control heater is set to 50-70 ℃, and the heating time is 30-90 min.
Has the advantages that:
this application is fit for the industrial production and uses, it is effectual to optional nature extremely poor coal kind or middlings accessory ingredient etc. selection, equipment is difficult to corroded, moreover, the steam generator is simple in structure, the deliming is efficient, excellent in use effect saves the consumption of reaction medicament, reaction time, speed are controllable, through the adjustable deliming degree of control reaction time, the solid-liquid separation after having accomplished the reaction, volatile acid or alkali can in time be retrieved among the reaction process and after the reaction, effectively reduce the pollution to operating personnel and environment.
Description of the drawings:
FIG. 1 is a schematic structural diagram of an environmentally-friendly fine coal chemical deliming apparatus according to the present invention.
In the figure: 1-a feeder, 2-a stirring motor, 3-a stirring rod, 4-a temperature controller, 5-a liquid level meter, 6-a temperature control heater, 7-a water inlet, 8-a water outlet, 9-a centrifuge, 10-a gas collector, 11-a fan and 12-a pipeline.
The specific implementation mode is as follows:
the following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:
as shown in FIG. 1, the environment-friendly fine coal chemical deliming device comprises a deliming system, a heating system and a separation and recovery system which are sequentially connected through pipelines;
the deashing system comprises a deashing reactor which is a cylindrical container with a hemispherical structure at the bottom, a stirring motor 2 is arranged at the center of the top circle of the deashing reactor, a material feeding device 1 controlled by a switch is arranged at one side of the deashing reactor, a temperature controller 4 extending into the interior is arranged at the other side of the deashing reactor, the temperature controller 4 consists of an external jacket and a resistance temperature measuring rod, wherein the output shaft of the stirring motor 2 is connected with a stirring rod 3 extending into the deliming reactor, the end of the stirring rod 3 is provided with a stirring impeller, the outer side of the deliming reactor is provided with a liquid level meter 5 for displaying the position of the internal liquid, the liquid level height in the deliming reactor is observed by the liquid level meter 5 to detect the deliming process and abnormal phenomena, when the page is observed to rise too fast and is about to exceed the capacity of the reactor, immediately stopping heating and discharging the liquid (according to step c), and checking whether the reaction liquid is mismatched and whether the reaction temperature is too high;
the heating system comprises a water bath heater arranged outside the deliming reactor, a supporting frame for supporting the deliming reactor to be suspended is arranged at the bottom and the side wall in the water bath heater, a temperature control heater 7 is arranged at the bottom of the deliming reactor, a water inlet 7 is arranged on one side of the top of the water bath heater, and a water outlet 8 is arranged on one side of the bottom of the water bath heater;
the separation and recovery system comprises a centrifuge 9, a gas collector 10 and a fan 11, wherein the inlet of the centrifuge 9 is connected with the bottom of the deliming reactor through a pipeline 12, the gas collector 10 is connected with the upper part of one side of the deliming reactor through a pipeline, and the fan 11 for generating suction is arranged in the pipeline.
The ash removal reactor, the temperature control jacket, the connecting pipeline and the gas recoverer are all made of polytetrafluoroethylene or tetrafluoroethylene linings, and the centrifugal machine impeller and the ash removal reactor are made of Monel alloy.
An environment-friendly fine coal chemical deashing method comprises the following steps:
a. when the device is used, the water outlet 8 is closed, water is injected into the water bath heating device through the water inlet 7 until the water bath heating device is full, the switch of the material feeder 1 is opened, the ash content is about 40%, the coal with high ash content and fine particles are crushed to be below 3mm, the coal with high ash content is added into the deliming reactor through the material feeder 1, the switch of the material feeder 1 is closed after the deliming agent is added, the deliming agent is 20% hydrofluoric acid added according to the solid-to-liquid ratio of 1: 3-5, the stirring motor 2 is started to drive the stirring rod to rotate, then the heating temperature is set through the temperature controller 4, the switch of the water bath heater 6 is opened for heating, the temperature controller 4 sets the temperature to be 40-60 ℃, the temperature control;
b. in the heating process, keeping the gas recovery device 10 full of water, recovering the generated volatile gas through the gas recovery device, observing the liquid level height in the deliming reactor through the liquid level meter 5 to detect the deliming process and abnormal phenomena, immediately stopping heating and discharging materials if the liquid level is observed to rise too fast to exceed the capacity of the reactor, and checking whether the reaction liquid is mismatched and the reaction temperature is too high;
c. after the reaction is finished, a switch of the material feeder 1 is turned on, the fan 11 is started at the same time, the volatile gas in the deliming reactor is prevented from being dissipated, the centrifugal machine 9 is turned on, and the delimed coal and the reaction reagent are extracted and separated through the pipeline 12 to obtain the coal and the reacted liquid;
d. and (3) closing the water bath heater after separation, stopping the stirring motor 12, spraying water into the deliming reactor through the feeding port 1 for washing, then opening the pipeline 12 to clean the centrifuge, closing the fan 11 after washing, and finally opening the water opening 8 for draining water.
Example 1:
the method comprises the steps of crushing the coking middlings to be less than 3mm, closing an outlet 8, filling water into a water bath heating device through a water inlet 7, opening a material feeder 1, adding the coking middlings into a deliming reactor through the material feeder 1, adding 20% hydrofluoric acid according to a solid-to-liquid ratio of 1 (3-5), closing the material feeder 1, opening a stirrer 2, setting the temperature through a temperature controller 4 to be 40-60 ℃, and opening a water bath heater 6 to switch on and off for heating.
b. In the heating process, the gas recovery device 10 is kept full of water, the generated acidic/alkaline volatile gas is recovered through the gas recovery device, the liquid level is observed through the liquid level meter 5, and heating is carried out for 30-90 min.
c. After the reaction is finished, opening the feeder 1, simultaneously opening the fan 11 to exhaust air to prevent volatile gas from dissipating, opening the centrifugal machine 9, opening the pipeline 12 at the bottom, separating the deashed coal from the reaction reagent by the centrifugal machine to obtain treated coking coal and reacted liquid, collecting the liquid obtained by the gas collector to recover hydrofluoric acid, and recovering various reagents and salts from the reacted liquid by other modes; the ash removal agent with the mass fraction of 20 percent is matched, and about 40 percent of ash in the high-ash coal can be reduced to about 10 percent after reaction;
d. and after separation, the water bath heater is closed, the pipeline 12 is closed, the stirrer is closed, the material feeder 1 is used for spraying water into the deliming reactor for washing, the pipeline 12 is opened for drainage, the fan 11 is closed after the washing is finished, and the water outlet 8 is opened for drainage.
Claims (6)
1. The utility model provides an environment-friendly fine grain coal chemical deliming equipment which characterized in that: the system comprises a deliming system, a heating system and a separation and recovery system which are sequentially connected through pipelines;
the deashing system comprises a deashing reactor, the deashing reactor is a cylindrical container with a hemispherical structure at the bottom, a stirring motor (2) is arranged at the circle center of the top of the deashing reactor, a material inlet device (1) controlled by a switch is arranged at one side of the deashing reactor, a temperature controller (4) extending into the deashing reactor is arranged at the other side of the deashing reactor, the temperature controller (4) consists of an external jacket and a resistance temperature measuring rod, wherein an output shaft of the stirring motor (2) is connected with a stirring rod (3) extending into the deashing reactor, a stirring impeller is arranged at the end of the stirring rod (3), and a liquid level meter (5) for displaying the position of internal liquid is arranged at the outer side of;
the heating system comprises a water bath heater arranged outside the deliming reactor, a supporting frame for supporting the deliming reactor to be suspended is arranged at the bottom and the side wall in the water bath heater, a temperature control heater (7) is arranged at the bottom of the deliming reactor, a water inlet (7) is arranged on one side of the top of the water bath heater, and a water outlet (8) is arranged on one side of the bottom of the water bath heater;
the separation and recovery system comprises a centrifugal machine (9), a gas collector (10) and a fan (11), wherein an inlet of the centrifugal machine (9) is connected with the bottom of the deliming reactor through a pipeline (12), the gas collector (10) is connected with the upper part of one side of the deliming reactor through a pipeline, and the fan (11) generating suction is arranged in the pipeline.
2. The environment-friendly fine-grained coal chemical deliming apparatus according to claim 1, characterized in that: the ash removal reactor, the temperature control jacket, the connecting pipeline and the gas recoverer are all made of polytetrafluoroethylene or tetrafluoroethylene linings, and the centrifugal machine impeller and the ash removal reactor are made of Monel alloy.
3. A deliming method using the environmentally friendly fine coal chemical deliming apparatus of claim 1, characterized by the steps of:
a. when the water-bath heating device is used, the water outlet (8) is closed, water is injected into the water-bath heating device through the water inlet (7) until the water-bath heating device is full, the switch of the material feeder (1) is opened, fine-grain coal with proper granularity is added into the deliming reactor through the material feeder (1), a deliming agent is added, then the switch of the material feeder (1) is closed, the stirring motor (2) is started to drive the stirring rod to rotate, then the heating temperature is set through the temperature controller (4), and the switch of the water-bath heater (6) is opened for heating;
b. in the heating process, keeping the gas recovery device (10) full of water, recovering the generated volatile gas through the gas recovery device, observing the liquid level height in the deliming reactor through a liquid level meter (5) to detect the deliming process and abnormal phenomena, immediately stopping heating and discharging materials if the liquid level is observed to rise too fast to exceed the capacity of the reactor, and checking whether the reaction liquid is mismatched and the reaction temperature is too high;
c. after the reaction is finished, a switch of the material feeding device (1) is turned on, the fan (11) is started at the same time, the volatile gas in the deliming reactor is prevented from being dissipated, the centrifugal machine (9) is turned on, and the delimed coal and the reaction agent are extracted and separated through the pipeline (12) to obtain the coal and the reacted liquid;
d. and (3) closing the water bath heater after separation, stopping the stirring motor (12), spraying and washing the ash removal reactor through the feeding port (1), then opening the pipeline (12) to clean the centrifuge, closing the fan (11) after cleaning is finished, and finally opening the water opening (8) to drain water.
4. The deliming process of claim 3, wherein: the used fine-grained coal is high-ash fine-grained coal, the ash content is about 40 percent, and the coal is crushed to be less than 3 mm.
5. The deliming process of claim 3, wherein: the deliming agent is 20% hydrofluoric acid added according to the solid-liquid ratio of 1: 3-5.
6. The deliming process of claim 3, wherein: the temperature controller (4) is set to 40-60 ℃, the temperature control heater (6) is set to 50-70 ℃, and the heating time is 30-90 min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010075765.7A CN111250021A (en) | 2020-01-22 | 2020-01-22 | Environment-friendly fine coal chemical deashing equipment and method |
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| CN202010075765.7A CN111250021A (en) | 2020-01-22 | 2020-01-22 | Environment-friendly fine coal chemical deashing equipment and method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2661313Y (en) * | 2003-09-09 | 2004-12-08 | 魏大山 | Coal and acid reaction desulfurizing and deashing device |
| US20110078948A1 (en) * | 2009-10-01 | 2011-04-07 | Chandrashekhar Ganpatrao Sonwane | Ash removal from coal: process to avoid large quantities of hydrogen fluoride on-site |
| CN102041128A (en) * | 2010-12-03 | 2011-05-04 | 宜宾天原集团股份有限公司 | Chemical deashing method for coal |
| CN203508014U (en) * | 2013-09-18 | 2014-04-02 | 江西理工大学 | Novel equipment for deashing and desulfurizing carbon black generated by pyrolysis of scrap tires |
| CN207605861U (en) * | 2017-10-09 | 2018-07-13 | 冯爱成 | A kind of fine coal slurry desliming drop apparatus for ash |
| CN209501432U (en) * | 2019-01-02 | 2019-10-18 | 天津渤海望亚涂料有限公司 | A kind of coating material production heating water bath chamber |
-
2020
- 2020-01-22 CN CN202010075765.7A patent/CN111250021A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2661313Y (en) * | 2003-09-09 | 2004-12-08 | 魏大山 | Coal and acid reaction desulfurizing and deashing device |
| US20110078948A1 (en) * | 2009-10-01 | 2011-04-07 | Chandrashekhar Ganpatrao Sonwane | Ash removal from coal: process to avoid large quantities of hydrogen fluoride on-site |
| CN102041128A (en) * | 2010-12-03 | 2011-05-04 | 宜宾天原集团股份有限公司 | Chemical deashing method for coal |
| CN203508014U (en) * | 2013-09-18 | 2014-04-02 | 江西理工大学 | Novel equipment for deashing and desulfurizing carbon black generated by pyrolysis of scrap tires |
| CN207605861U (en) * | 2017-10-09 | 2018-07-13 | 冯爱成 | A kind of fine coal slurry desliming drop apparatus for ash |
| CN209501432U (en) * | 2019-01-02 | 2019-10-18 | 天津渤海望亚涂料有限公司 | A kind of coating material production heating water bath chamber |
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