CN110776959A - Integrated pyrolysis gasification device and method for seed coal - Google Patents
Integrated pyrolysis gasification device and method for seed coal Download PDFInfo
- Publication number
- CN110776959A CN110776959A CN201911090343.0A CN201911090343A CN110776959A CN 110776959 A CN110776959 A CN 110776959A CN 201911090343 A CN201911090343 A CN 201911090343A CN 110776959 A CN110776959 A CN 110776959A
- Authority
- CN
- China
- Prior art keywords
- gasification
- pyrolysis
- semicoke
- area
- coal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/58—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels combined with pre-distillation of the fuel
- C10J3/60—Processes
- C10J3/64—Processes with decomposition of the distillation products
- C10J3/66—Processes with decomposition of the distillation products by introducing them into the gasification zone
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/58—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels combined with pre-distillation of the fuel
- C10J3/60—Processes
- C10J3/62—Processes with separate withdrawal of the distillation products
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/721—Multistage gasification, e.g. plural parallel or serial gasification stages
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
- C10J2300/0936—Coal fines for producing producer gas
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Industrial Gases (AREA)
Abstract
The invention provides a device and a method for integrated pyrolysis and gasification of seed coal, which comprises a raw material bin and a reaction bin; the raw material bin is used for storing and discharging materials; the reaction bin is used for pyrolyzing and gasifying the seed coal in the raw material bin, the inner cavity of the reaction bin is divided into a pyrolysis area, a gasification area and a coke discharging area, the gasification area and the coke discharging area are arranged below the pyrolysis area in parallel, the seed coal in the raw material bin is pyrolyzed by taking high-temperature synthesis gas generated by gasification as a heat carrier in the pyrolysis area to generate semicoke, part of the semicoke enters the coke discharging area to be discharged as a semicoke product, the other part of the semicoke enters the gasification area to be gasified, and the generated high-temperature water gas and the pyrolyzed raw gas are discharged after being filtered and purified by the seed coal in the process of ascending from bottom to top. The pyrolysis and gasification integrated technology reduces the fuel consumption required by the coal pyrolysis process, improves the energy utilization efficiency of the system, widens the utilization approach of the semicoke, and realizes the aims of high efficiency and low consumption in the coal chemical industry.
Description
Technical Field
The application belongs to the technical field of coal chemical industry, and particularly relates to a seed coal integrated pyrolysis gasification device and method.
Background
Based on the current situation of energy supply and consumption structure in China, the status of coal as main energy in China does not change radically. At present, the utilization mode of coal resources mainly based on direct combustion in China basically only utilizes the combustion property of coal, so that the problems of resource waste of useful components in coal molecules and serious environmental pollution are caused. Therefore, the development of a plurality of technologies is coupled, the coal resources can be utilized in a gradient manner, and the clean and efficient coal quality-based conversion and utilization technology is a problem which needs to be solved in the coal chemical industry of China at present.
According to the structure and physicochemical properties of coal, a coal quality-based utilization technology of coal, oil, gas, electricity and chemical integrated poly-generation by taking pyrolysis as a leading part is implemented, the maximization of the overall resource conversion efficiency is emphasized, the centralized and comprehensive treatment of pollutants in the conversion process is realized, and the social and environmental benefits in the coal conversion process can be greatly improved.
At present, although the fast pyrolysis can generate coal gas with high added value, the generated semicoke has a large amount of sensible heat, the recovery and the utilization of the sensible heat of the solid are very difficult, the heat recovery efficiency is low, and the investment of recovery equipment is large; the pyrolysis gas is chilled after high-temperature dust removal, so that a large amount of waste heat is wasted, and a large amount of water and power are consumed in the cooling process.
The conventional gasification process is to burn the raw materials partially to generate heat required by gasification, so that the gasification process can run continuously, and the partially burned fuel is changed into carbon dioxide, so that the thermal efficiency and the cold gas efficiency of the gasification process are low. In addition, the traditional gasification process needs to obtain high-calorific-value coal gas, pure oxygen is needed as a gasification agent in the gasification process, the investment of an air separation device is greatly increased, a large amount of electric energy needs to be consumed in the operation process, the operation cost is greatly improved, and the yield is greatly reduced.
Based on the defects, the invention provides the seed coal pyrolysis and gasification integrated device, which couples the medium-low temperature seed coal pyrolysis and the semicoke gasification in one reactor, provides the required energy for the pyrolysis of low-rank coal by utilizing the sensible heat of high-temperature coal gas generated by the coal gasification, converts the seed coal into high-quality medium-low temperature coal tar and synthesis gas in a pyrolysis zone, and realizes the graded conversion and optimized integration of pulverized coal pyrolysis and semicoke gasification.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the seed coal integrated pyrolysis gasification device, which integrates the chemical reactor and the pyrolysis reactor, realizes effective coupling of energy, materials, products, processes and devices, greatly improves the energy conversion efficiency and improves the quality of semicoke products.
Meanwhile, the invention provides a seed coal integrated pyrolysis gasification method using the seed coal integrated pyrolysis gasification device.
The technical scheme adopted by the invention is as follows:
an integrated pyrolysis gasification device for seed coal, which comprises a raw material bin and a reaction bin; the raw material bin is used for storing and discharging materials;
the reaction bin is used for pyrolyzing and gasifying the seed coal in the raw material bin, the inner cavity of the reaction bin is divided into a pyrolysis area, a gasification area and a coke discharging area, the gasification area and the coke discharging area are arranged below the pyrolysis area in parallel, the seed coal in the raw material bin is pyrolyzed by taking high-temperature synthesis gas generated by gasification as a heat carrier in the pyrolysis area to generate semicoke, part of the semicoke enters the coke discharging area to be discharged as a semicoke product, the other part of the semicoke enters the gasification area to be gasified, and the generated high-temperature water gas and the pyrolyzed raw gas are discharged after being filtered and purified by the seed coal in the process of ascending from bottom to top.
Further defined, the semicoke flux ratio of the gasification zone to the coke discharge zone is 1: 1 to 3.
Further limiting, a heat exchange fluid channel is arranged on the outer wall of the gasification area and/or the coke discharging area, and the temperature of the gasification area and the temperature of the coke discharging area are regulated and controlled respectively.
Further limiting, a gas outflow hole and a gas inflow port are formed in the wall of the heat exchange fluid channel corresponding to the gasification zone, the gas outflow hole is communicated with the lower part of the gasification zone, and a gasification agent is introduced into the gasification zone; and a gas baffle is arranged in the heat exchange fluid channel, and a gas outlet hole and a gas inlet of the heat exchange fluid channel are separated at two sides of the gas baffle by the gas baffle.
Further limit, the coke discharging area is concentrically arranged at the outer side of the gasification area or the coke discharging area is concentrically distributed at the outer side and the inner side of the gasification area.
Further limiting, the bottom of the gasification area is communicated with an ash buffer bin and is communicated with a slag salvaging pool through the ash buffer bin; the bottom of the coke discharge area is communicated with the semicoke cache bin.
Further limiting, a heat exchange jacket is arranged on the outer wall of the semicoke buffer bin, a steam outlet is formed in the heat exchange jacket, and the steam outlet is communicated with a gas inflow port of the heat exchange fluid channel through a pipeline.
Further limiting, the bottom of the ash slag buffer bin is provided with a slag discharge rotary valve which is communicated with the slag salvaging pool; the bottom of semicoke buffer storage storehouse is provided with in proper order and sprays the mechanism and push away burnt mechanism.
The integrated pyrolysis gasification method for the seed coal can be realized by the integrated pyrolysis gasification device for the seed coal, and specifically comprises the following steps:
1) seed coal from a raw material bin enters a reaction bin, the seed coal is subjected to countercurrent heat exchange with high-temperature water gas at 800-1200 ℃ generated by gasification in a pyrolysis zone and a bottom gasification zone of the reaction bin, the temperature is gradually increased to 500-800 ℃ for pyrolysis reaction, and raw gas generated by pyrolysis is filtered and purified by the seed coal in the process of rising along with the high-temperature water gas from bottom to top and then is discharged;
2) a part of the pyrolyzed semicoke directly enters a gasification zone under the action of self weight, and is subjected to gasification reaction with a gasification agent introduced into the bottom, high-temperature water gas generated after the reaction is used as a heat carrier and directly enters the pyrolysis zone through gaps of the seed coal particles for pyrolysis reaction, and ash generated by the gasification reaction is discharged; and the other part of the semicoke after pyrolysis directly enters a coke discharging area and is output as a semicoke product.
Further limited, step 2) is followed by step 3), specifically: the semicoke discharged from the coke discharging area is cooled by heat exchange with cooling water of the heat exchange jacket, and water vapor generated by heat exchange enters the heat exchange fluid channel to be used as a gasifying agent to enter the gasifying area to participate in the gasification reaction.
Further limiting, the step 3) is specifically as follows: the semicoke discharged from the coke discharging area is subjected to heat exchange and cooling by utilizing cooling water of a heat exchange jacket, and water vapor generated by heat exchange enters a heat exchange fluid channel to be used as a gasifying agent to enter the gasification area to participate in gasification reaction, so that the primary cooling of the semicoke is completed; and the semicoke subjected to primary cooling is subjected to spray cooling before discharging to finish secondary cooling, and then is discharged through a coke pushing mechanism.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, medium-low temperature seed coal pyrolysis and semicoke gasification are coupled into a whole, the sensible heat of high-temperature coal gas generated by coal gasification is utilized to provide required energy for the pyrolysis of low-rank coal, seed coal is converted into high-quality medium-low temperature coal tar and synthesis gas in a pyrolysis zone, the graded conversion and optimized integration of pulverized coal pyrolysis and semicoke gasification are realized, and high-quality coal tar and synthesis gas are enriched; the semicoke generated in the pyrolysis process directly enters the gasification area to be gasified, so that the coupling of materials and energy in the pyrolysis process and the gasification process is realized, namely, the effective coupling and the integrated optimization of energy, materials, products, processes and devices are realized, the energy conversion efficiency is greatly improved, and the energy conversion efficiency is higher than that of the conventional pyrolysis process and other coal conversion technologies.
(2) The invention adopts partial semicoke gasification and has an independent channel, and ash content after semicoke gasification is independently discharged, thereby effectively reducing the ash content of the semicoke product and improving the quality of the semicoke product.
(3) Due to the arrangement of the gasification area, the pyrolysis environment of pyrolysis is improved, the quality of pyrolysis tar and pyrolysis gas is changed, and meanwhile, the yield of the tar and the pyrolysis gas can be increased.
(4) The invention utilizes the high-temperature synthesis gas generated by gasification as the gas heat carrier of the system, and directly gasifies the high-temperature semicoke after pyrolysis, compared with the conventional technology of adopting flue gas as the heat carrier, the carbon dioxide emission of unit products is obviously reduced, and the coal gas basically does not contain nitrogen and has high heat value.
(5) The pyrolysis and gasification integrated technology reduces the fuel consumption required by the coal pyrolysis process, improves the energy utilization efficiency of the system, widens the utilization approach of the semicoke, and realizes the aims of high efficiency and low consumption in the coal chemical industry.
Drawings
FIG. 1 is a schematic structural view of a seed coal integrated pyrolysis gasification apparatus according to example 1;
FIG. 2 is a schematic structural view of a seed coal integrated pyrolysis gasification apparatus according to example 2;
FIG. 3 is a side view of the coal integrated pyrolysis gasification apparatus of FIG. 2;
in the figure: 1-raw material bin, 2-reaction bin, 201-pyrolysis zone, 202-gasification zone, 203-coke discharging zone, 204-gas extractor, 3-slag discharging mechanism, 4-ash buffering bin, 5-semicoke buffering bin, 6-heat exchange fluid channel, 601-gas baffle, 602-gas outlet hole, 603-gas inlet, 7-slag fishing pool, 8-slag discharging rotary valve, 9-coke discharging control valve, 10-scraper slag discharging machine, 11-heat exchange jacket, 12-spraying mechanism and 13-coke pushing mechanism.
Detailed Description
The technical solution of the present invention will be further explained with reference to the drawings and examples, but the present invention is not limited to the following implementation cases.
The utility model provides a seed coal integration pyrolysis gasification device is as an organic whole with seed coal pyrolysis and semicoke gasification coupling, utilizes the high temperature coal gas sensible heat that coal gasification produced, for the pyrolysis of low order coal provides required energy, makes seed coal conversion be high-quality well low temperature coal tar and synthetic gas in pyrolysis zone 201, has realized the hierarchical conversion and the optimization integration of fine coal pyrolysis, semicoke gasification, has realized the effective coupling of energy, material, product, technology, device promptly, has increased substantially energy conversion efficiency.
The following examples are given by taking the medium and low temperature seed coal of the shenmuo coal mine as an example, and the properties of the seed coal as a raw material and the properties of the half-angle product and the coal gas components after being treated by the method of the invention are respectively as follows:
TABLE 1 Industrial analysis of the feed coal
TABLE 2 Industrial analysis of semicoke
TABLE 3 gas composition analysis
Therefore, the semi-angle product obtained by the invention has good quality and less ash content, and the discharged coal gas component contains low nitrogen and has high heat value.
Example 1
Referring to fig. 1, the seed coal integrated pyrolysis gasification device of the embodiment includes a raw material bin 1, a reaction bin 2, an ash buffer bin 4 and a semicoke buffer bin 5; wherein the content of the first and second substances,
the raw material bin 1 is used for storing and discharging materials; is fixed at the top of the reaction bin 2, the top of the raw material bin 1 is provided with a coal inlet, and the bottom of the raw material bin is communicated with the coal inlet at the top of the reaction bin 2 through a pipeline.
Reaction bin 2 for seed coal pyrolysis and gasification with raw materials storehouse 1, its shape is circular barrel, its inner chamber divide into pyrolysis district 201, gasification district 202 and row burnt district 203, pyrolysis district 201 is laid in the top of gasification district 202 and row burnt district 203, the raw coke oven gas export has been seted up on the section of thick bamboo wall of pyrolysis district 201, install gas exporter 204 above pyrolysis district 201, this gas exporter 204 comprises 2 open ring shape guiding gutters in bottom and the intercommunication groove with two ring shape guiding gutters intercommunication and derivation gas, the cross section of guiding gutter is the shape of falling V, the one end of the intercommunication groove in the outside extends to the raw coke oven gas export, export gases such as the raw coke oven gas of pyrolysis district 201 through the raw coke oven gas export. The gasification zone 202 and the coke discharging zone 203 are arranged in parallel at the lower part of the reaction bin 2, namely, arranged below the pyrolysis zone 201. The gasification area 202 is arranged at the inner side of the coke discharging area 203 concentrically with the coke discharging area 203, the bottom of the gasification area 202 is provided with a slag discharging mechanism 3, an ash discharging port of the slag discharging mechanism 3 is communicated with the ash buffering bin 4, and ash is discharged into the ash buffering bin 4. The center of the bottom of the slag discharging mechanism 3 is provided with a gasification agent inlet which is communicated with a gasification agent pipeline through a pipeline. A semicoke outlet is formed in the bottom of the semicoke discharging area 203, a semicoke discharging control valve 9 is installed on the semicoke outlet, and the semicoke flows into the semicoke buffering bin 5 through the semicoke discharging control valve 9 and then flows by the self gravity. The semicoke buffer bin 5 is installed below the coke discharge area 203.
Further, in order to reduce the temperature of the semicoke and ensure the gasification reaction temperature, the outer walls of the semicoke region and the coke discharge region 203 are respectively provided with a heat exchange fluid channel 6, and water or gas or other heat exchange fluids are filled in the heat exchange fluid channels 6, so as to realize the temperature regulation of the gasification region 202 and the coke discharge region 203. In order to ensure the regulation and control effect, the heat exchange fluid channel 6 corresponding to the semicoke region and the heat exchange fluid channel 6 corresponding to the coke discharge region 203 can be communicated or not communicated, or different heat exchange media with different temperatures or different temperatures can be filled, and the regulation and control effect can be adjusted according to the actual temperature control condition.
Further, in order to ensure the gasification and pyrolysis effects, the semicoke flux ratio of the gasification area 202 and the coke discharging area 203 in the embodiment is 1: 1, it is also possible to use a mixture of 1: adjusted within the range of 1-3.
The method for realizing the seed coal integrated pyrolysis gasification by using the seed coal integrated pyrolysis gasification device comprises the following specific steps:
(1) seed coal from a raw material bin 1 enters a reaction bin 2, the seed coal is subjected to countercurrent heat exchange between a pyrolysis zone 201 of the reaction bin 2 and high-temperature water gas at 800-1200 ℃ generated by gasification in a bottom gasification zone 202, the temperature is gradually increased to 500-800 ℃ to carry out pyrolysis reaction, and raw gas generated by pyrolysis is filtered by the seed coal in the process of ascending along with the high-temperature water gas from bottom to top, is discharged by diversion of a gas guide-out device 204, and enters the next treatment process.
(2) A part of the pyrolyzed semicoke directly enters the gasification zone 202 under the action of self weight, and is subjected to gasification reaction with a gasification agent introduced into the bottom, high-temperature water gas generated after the reaction is used as a heat carrier and directly enters the pyrolysis zone 201 through gaps of the seed coal particles for pyrolysis reaction, and ash generated by the gasification reaction is discharged and enters the ash buffer bin 4; and the other part of the semicoke after pyrolysis directly enters the coke discharging area 203 for gradual heat exchange and temperature reduction, and then enters the semicoke buffering bin 5 to be output as a semicoke product.
Example 2
Referring to fig. 2 and 3, the seed coal integrated pyrolysis gasification device of the embodiment includes a raw material bin 1, a reaction bin 2, an ash buffer bin 4 and a semicoke buffer bin 5; wherein the content of the first and second substances,
the raw material bin 1 is used for storing and discharging materials; is fixed at the top of the reaction bin 2, the top of the raw material bin 1 is provided with a coal inlet, and the bottom of the raw material bin is communicated with the coal inlet at the top of the reaction bin 2 through a pipeline.
Reaction bin 2 for seed coal pyrolysis and gasification with raw materials storehouse 1, its shape is square barrel, its inner chamber divide into pyrolysis zone 201, gasification zone 202 and row burnt district 203, pyrolysis zone 201 is laid in the top of gasification zone 202 and row burnt district 203, the raw coke oven gas export has been seted up on the section of thick bamboo wall of pyrolysis zone 201, install gaseous exporter 204 above pyrolysis zone 201, this gaseous exporter 204 is for the horizontal guiding gutter of the shape of falling V-arrangement and will two liang of horizontal guiding gutters intercommunication and with gaseous intercommunication groove component outside reaction bin 2 of exporting by a plurality of cross-sections, wherein the end of two intercommunication grooves extends to the raw coke oven gas export promptly, export gases such as the raw coke oven gas with pyrolysis zone 201 through the raw coke oven gas export. The gasification region 202 and the coke discharging region 203 are arranged in parallel at the lower part of the reaction bin 2, namely the lower part of the pyrolysis region 201 is divided into the gasification region 202 and the coke discharging region 203, the coke discharging regions 203 and the gasification regions 202 are distributed at intervals, and the coke discharging region 203 is arranged at the outermost side, namely 3 coke discharging regions 203 and 2 gasification regions 202 are distributed at intervals, so that the half-angle heat of the coke discharging region 203 can be fully recycled by the gasification regions 202. The bottom in gasification district 202 sets up lime-ash buffering storehouse 4, installs row sediment rotary valve 8 on the export in lime-ash buffering storehouse 4, through arranging sediment rotary valve 8 and draging for the sediment pond 7 intercommunication, discharges the lime-ash to the sediment pond 7 in cooling, and the rethread scraper blade slag extractor 10 discharges the sediment pond outward transport. A semicoke outlet is formed in the bottom of the semicoke discharging area 203, a semicoke discharging control valve 9 is installed on the semicoke outlet, semicoke flows into a semicoke buffering bin 5 through the semicoke discharging control valve 9 by means of self gravity, and the semicoke buffering bin 5 is installed below the semicoke discharging area 203.
Further, in order to ensure that the gasification agent can fully absorb the semicoke heat of the coke discharging area 203, and recycle the waste heat, a heat exchange fluid channel 6 built by refractory bricks is arranged between the semicoke area and the coke discharging area 203, a gas outflow hole 602 and a gas inflow port 603 are formed in the side wall of the bottom of the heat exchange fluid channel 6, a gas baffle 601 extending upwards is arranged at the bottom of the heat exchange fluid channel 6, the gas outflow hole 602 and the gas inflow port 603 are separated by the gas baffle 601, so that the gas outflow hole 602 and the gas inflow port 603 are distributed on two sides of the gas baffle 601, the flow of the gasification agent is prolonged, and the heat absorption effect is improved. The gas outflow holes 602 face the gasification zone 202 and are communicated with the lower part of the gasification zone 202, that is, the left and right side walls of the gasification zone 202 are respectively provided with gas outflow holes 602 which are arranged oppositely, and in order to ensure that the gasification agent is distributed more uniformly and prevent ash from entering the heat exchange fluid channel 6, the gas outflow holes 602 are provided with louver type screen plates with downward openings.
In order to ensure that the heat exchange fluid channel 6 does not influence the flow of the semicoke in the reaction bin 2, the top of the heat exchange fluid channel is built into an inverted V-shaped pointed structure.
Further, in order to ensure the gasification and pyrolysis effects, the semicoke flux ratio of the gasification area 202 and the coke discharging area 203 in the embodiment is 1: 2.
further, arrange heat exchange jacket 11 on the outer wall of semicoke buffer storage storehouse 5, this heat exchange jacket 11 can be that multiunit heat exchange tube arranges side by side and constitutes, also can be sandwich structure, it can guarantee that the coolant liquid can through realizing the cooling to the semicoke. Adopt the winding of multiunit heat exchange tube on the outer wall of semicoke buffer storage storehouse 5 in this embodiment, seted up steam outlet moreover on its pipe wall, steam outlet passes through pipeline and heat transfer fluid channel 6's gas flow inlet 603 intercommunication, if the heat exchange tube intussuseption is filled with the oxygen-removed water, then the oxygen-removed water produces steam with the semicoke heat transfer after, can accomplish gasification reaction as the gasification agent of heat transfer fluid channel 6. The bottom of the semicoke buffer bin 5 can be further provided with a spraying mechanism 12 and a coke pushing mechanism 13, water is sprayed to the semicoke through the spraying mechanism 12, the temperature of the semicoke is further reduced, meanwhile, the coal gas can be effectively prevented from leaking out of the coke pushing mechanism 13, the semicoke after being sprayed and cooled is further pushed by the coke pushing mechanism 13, and the semicoke is ensured to be smoothly discharged.
The method for realizing the seed coal integrated pyrolysis gasification by using the seed coal integrated pyrolysis gasification device comprises the following specific steps:
(1) seed coal from a raw material bin 1 enters a reaction bin 2, the seed coal is subjected to countercurrent heat exchange between a pyrolysis zone 201 of the reaction bin 2 and high-temperature water gas at 800-1200 ℃ generated by gasification in a bottom gasification zone 202, the temperature is gradually increased to 500-800 ℃ to carry out pyrolysis reaction, and raw gas generated by pyrolysis is filtered by the seed coal in the process of ascending along with the high-temperature water gas from bottom to top, is discharged by diversion of a gas guide-out device 204, and enters the next treatment process.
(2) A part of the pyrolyzed semicoke directly enters the gasification zone 202 under the action of self weight, and is subjected to gasification reaction with a gasification agent introduced into the bottom, high-temperature water gas generated after the reaction is used as a heat carrier and directly enters the pyrolysis zone 201 through gaps of the seed coal particles for pyrolysis reaction, and ash generated by the gasification reaction is discharged and enters the ash buffer bin 4; the other part of the semicoke after pyrolysis directly enters the coke discharging area 203 for gradual heat exchange and temperature reduction, and then enters the semicoke buffering bin 5.
(3) The semicoke that discharges from coke discharging area 203 utilizes the cooling water of heat transfer jacket 11 to carry out the heat transfer cooling to it, and the vapor that the heat transfer produced gets into gasification district 202 as the gasifying agent in heat transfer fluid passageway 6, participates in the gasification and is reversed, realizes the steam retrieval and utilization, specifically is:
the method is characterized in that deoxygenated water is introduced into a heat exchange pipe, the semicoke discharged from the coke discharge area 203 is subjected to heat exchange and cooling by utilizing the deoxygenated water of the heat exchange pipe, water vapor generated by the heat exchange of the deoxygenated water enters the heat exchange fluid channel 6 and is drained through the gas baffle 601, the water vapor flows from bottom to top in the lower part of the heat exchange fluid channel 6 and fully absorbs heat transferred by the coke discharge area 203, the water vapor flows downwards from the upper part through the drainage of the gas baffle 601, enters the gasification area 202 from the lower part of the gasification area 202 and participates in gasification reaction, and the semicoke discharged from the coke discharge area 203 enters the semicoke buffer storage bin 5 and then is subjected to primary cooling through the heat exchange pipe, and then is sprayed and cooled before discharging, so that secondary cooling.
Example 3
The difference with embodiment 1 is that the outer wall of the coke discharging area 203 of this embodiment is not provided with the heat exchange fluid channel 6, the outer wall of the semicoke buffering bin 5 below the coke discharging area 203 is provided with the heat exchange jacket 11, and the heat exchange jacket 11 is filled with deoxygenated water, so that the temperature of the semicoke is further reduced, and the semicoke is cooled once.
The spraying mechanism 12 and the coke pushing mechanism 13 can be arranged at the bottom of the semicoke buffer bin 5, water is sprayed to the semicoke through the spraying mechanism 12, the semicoke is cooled for the second time, meanwhile, the coal gas can be effectively prevented from leaking out of the coke pushing mechanism 13, the semicoke after being sprayed and cooled is further pushed by the coke pushing mechanism 13, and the semicoke is ensured to be discharged smoothly. Further, in order to ensure the gasification and pyrolysis effects, the semicoke flux ratio of the gasification area 202 and the coke discharging area 203 in the embodiment is 1: 1, it is also possible to use a mixture of 1: adjusted within the range of 1-3.
The other structure is the same as in embodiment 1.
The integrated pyrolysis gasification method of the corresponding seed coal comprises the following steps:
(1) seed coal from a raw material bin 1 enters a reaction bin 2, the seed coal is subjected to countercurrent heat exchange between a pyrolysis zone 201 of the reaction bin 2 and high-temperature water gas at 800-1200 ℃ generated by gasification in a bottom gasification zone 202, the temperature is gradually increased to 500-800 ℃ to carry out pyrolysis reaction, and raw gas generated by pyrolysis is filtered by the seed coal in the process of ascending along with the high-temperature water gas from bottom to top, is discharged by diversion of a gas guide-out device 204, and enters the next treatment process.
(2) A part of the pyrolyzed semicoke directly enters the gasification zone 202 under the action of self weight, and is subjected to gasification reaction with a gasification agent introduced into the bottom, high-temperature water gas generated after the reaction is used as a heat carrier and directly enters the pyrolysis zone 201 through gaps of the seed coal particles for pyrolysis reaction, and ash generated by the gasification reaction is discharged and enters the ash buffer bin 4; the other part of the semicoke after pyrolysis directly enters a coke discharging area 203 for gradual heat exchange and temperature reduction and then enters a semicoke buffer bin 5;
(3) after entering the semicoke buffer bin 5, the semicoke in the coke discharging area 203 is cooled for the first time by the heat exchange jacket 11, and then is cooled for the second time by spraying before discharging, and then is discharged out by the coke pushing mechanism 13.
The heat exchange medium in the heat exchange fluid channel 6 and the heat exchange jacket 11 according to the embodiments 1 to 3 may be water, gas or other liquid, which can meet the heat exchange requirement, and the specific coke discharging and gasifying related slag discharging mechanism 3, spraying mechanism 12, slag discharging rotary valve 8, coke discharging control valve 9, and the like belong to common equipment.
This application utilizes the high temperature synthetic gas that the gasification produced to do the gaseous heat carrier of system, and the high temperature semicoke direct gasification after the pyrolysis, does the heat carrier technical contrast with the conventional adoption flue gas, and the carbon dioxide emission of unit product obviously reduces, does not contain nitrogen gas basically in the coal gas, and the calorific value is high, and semicoke gasification has the independent channel moreover, and the ash content after the semicoke gasification discharges alone, can effectively reduce the ash content of product semicoke, improves the quality of product semicoke.
Claims (11)
1. The integrated pyrolysis gasification device for the seed coal is characterized by comprising a raw material bin (1) and a reaction bin (2); wherein the content of the first and second substances,
the raw material bin (1) is used for storing and discharging materials;
the reaction bin (2) is used for pyrolyzing and gasifying the seed coal in the raw material bin (1), the inner cavity of the reaction bin is divided into a pyrolysis area (201), a gasification area (202) and a coke discharging area (203), the gasification area (202) and the coke discharging area (203) are arranged below the pyrolysis area (201) in parallel, the seed coal in the raw material bin (1) is pyrolyzed to generate semicoke by taking high-temperature synthesis gas generated by gasification as a heat carrier in the pyrolysis area (201), part of the semicoke enters the coke discharging area (203) to be discharged as a semicoke product, the other part of the semicoke enters the gasification area (202) to be gasified, and high-temperature water gas and pyrolysis raw gas are discharged after being filtered and purified by utilizing the seed coal in the process of ascending from bottom to top.
2. A seeded coal-integrated pyrolysis gasification apparatus according to claim 1, characterized in that the char flux ratio of the gasification zone (202) and the char removal zone (203) is 1: 1 to 3.
3. A seed coal integrated pyrolysis gasification device according to claim 1, characterized in that the outer wall of the gasification region (202) and/or the coke discharging region (203) is provided with a heat exchange fluid channel (6) for respectively regulating and controlling the temperature of the gasification region (202) and the coke discharging region (203).
4. A seed coal integrated pyrolysis gasification device according to claim 3, wherein a gas outflow hole (602) and a gas inflow port (603) are formed in the wall of the heat exchange fluid channel (6) corresponding to the gasification zone (202), the gas outflow hole (602) is communicated with the lower part of the gasification zone (202), and a gasification agent is introduced into the gasification zone (202); a gas baffle plate (601) is provided in the heat exchange fluid channel (6), and a gas outflow hole (602) and a gas inflow port (603) of the heat exchange fluid channel (6) are partitioned on both sides of the gas baffle plate (601) by the gas baffle plate (601).
5. A seed coal integrated pyrolysis gasification device according to any one of claims 1 to 4, characterized in that the coke discharging area (203) is concentrically arranged outside the gasification area (202) or the coke discharging area (203) is concentrically arranged outside and inside the gasification area (202).
6. A seed coal integrated pyrolysis gasification device according to claim 5, characterized in that the bottom of the gasification area (202) is communicated with an ash buffer bin (4) and is communicated with a slag fishing pool (7) through the ash buffer bin (4); the bottom of the coke discharging area (203) is communicated with a semicoke buffer bin (5).
7. A seed coal integrated pyrolysis gasification device according to claim 6, wherein the outer wall of the semicoke buffer storage bin (5) is provided with a heat exchange jacket (11), the heat exchange jacket (11) is provided with a steam outlet, and the steam outlet is communicated with a gas inflow port (603) of the heat exchange fluid channel (6) through a pipeline.
8. A seed coal integrated pyrolysis gasification device according to claim 6, characterized in that the bottom of the ash buffer bin (4) is provided with a slag discharging rotary valve (8), and the slag discharging rotary valve (8) is communicated with a slag fishing pool (7); the bottom of the semicoke buffer bin (5) is sequentially provided with a spraying mechanism (12) and a coke pushing mechanism (13).
9. The integrated seed coal pyrolysis gasification method is realized by the integrated seed coal pyrolysis gasification device of claim 1, and specifically comprises the following steps:
1) seed coal from a raw material bin (1) enters a reaction bin (2), the seed coal is subjected to countercurrent heat exchange between a pyrolysis zone (201) of the reaction bin (2) and high-temperature water gas at 800-1200 ℃ generated by gasification in a bottom gasification zone (202), the temperature is gradually increased to 500-800 ℃ for pyrolysis reaction, and crude gas generated by pyrolysis is discharged after being filtered and purified by the seed coal along with the high-temperature water gas in the process of ascending from bottom to top;
2) one part of the pyrolyzed semicoke directly enters a gasification zone (202) under the action of self weight, and is subjected to gasification reaction with a gasification agent introduced into the bottom, high-temperature water gas generated after the reaction is used as a heat carrier and directly enters a pyrolysis zone (201) through gaps of the seed coal particles for pyrolysis reaction, and ash generated by the gasification reaction is discharged; and the other part of the semicoke after pyrolysis directly enters a coke discharging area (203) and is output as a semicoke product.
10. The integrated seed coal pyrolysis gasification method according to claim 9, further comprising a step 3) after the step 2), specifically: the semicoke discharged from the coke discharging area (203) is cooled by heat exchange with cooling water of the heat exchange jacket (11), and water vapor generated by heat exchange enters the heat exchange fluid channel (6) to be used as a gasifying agent to enter the gasifying area (202) to participate in the gasifying reaction.
11. The integrated pyrolysis gasification method for seed coal according to claim 10, wherein the step 3) is specifically as follows: the semicoke discharged from the coke discharging area (203) is subjected to heat exchange and cooling by utilizing cooling water of a heat exchange jacket (11), and water vapor generated by heat exchange enters a heat exchange fluid channel (6) to be used as a gasifying agent to enter a gasification area (202) to participate in gasification reaction, so that the primary cooling of the semicoke is completed; the semicoke after primary cooling is sprayed and cooled before discharging to finish secondary cooling, and then is discharged out through a coke pushing mechanism (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911090343.0A CN110776959A (en) | 2019-11-08 | 2019-11-08 | Integrated pyrolysis gasification device and method for seed coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911090343.0A CN110776959A (en) | 2019-11-08 | 2019-11-08 | Integrated pyrolysis gasification device and method for seed coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110776959A true CN110776959A (en) | 2020-02-11 |
Family
ID=69390286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911090343.0A Pending CN110776959A (en) | 2019-11-08 | 2019-11-08 | Integrated pyrolysis gasification device and method for seed coal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110776959A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030140559A1 (en) * | 2000-07-10 | 2003-07-31 | Wolfgang Krumm | Method and device for pyrolysis and gasification of substance mixtures containing organic constituents |
| CN1730609A (en) * | 2005-08-24 | 2006-02-08 | 王华峰 | Biomass pyrogenation gasification and purification method |
| CN101955803A (en) * | 2009-07-15 | 2011-01-26 | 山东科技大学 | Low-rank coal carbonization method |
| CN102021038A (en) * | 2009-09-14 | 2011-04-20 | 新奥科技发展有限公司 | Multilayer fluidized bed gasification furnace for preparing methane-rich gas by coal gasification |
| CN202766491U (en) * | 2012-08-14 | 2013-03-06 | 严大春 | Rubbish dry distillation, pyrolyzation, gasification and power generation system |
| CN205088193U (en) * | 2015-09-18 | 2016-03-16 | 广东碳中和能源开发有限公司 | Up -draft fixed bed gasifier of preparation low temperature, low tar gas |
| CN105524662A (en) * | 2014-10-22 | 2016-04-27 | 中国石油化工股份有限公司大连石油化工研究院 | Method for preparing synthetic gas through microwave pyrolysis and gasification of biomass |
| CN206033677U (en) * | 2016-08-23 | 2017-03-22 | 中石化炼化工程（集团）股份有限公司 | Powder coal carbonization device |
| CN107227176A (en) * | 2017-06-28 | 2017-10-03 | 孔令增 | A kind of method that closed gas generator hypomere stove pure oxygen gasification epimere stove destructive distillation combination carries out small beans continuous gasification |
| CN107760387A (en) * | 2017-10-30 | 2018-03-06 | 中国科学院广州能源研究所 | A kind of high nitrogen biomass castoff gasification, and combustion heating system and technique |
| CN108865306A (en) * | 2018-06-27 | 2018-11-23 | 新奥科技发展有限公司 | A kind of coke discharging and coupling technique is slurried |
-
2019
- 2019-11-08 CN CN201911090343.0A patent/CN110776959A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030140559A1 (en) * | 2000-07-10 | 2003-07-31 | Wolfgang Krumm | Method and device for pyrolysis and gasification of substance mixtures containing organic constituents |
| CN1730609A (en) * | 2005-08-24 | 2006-02-08 | 王华峰 | Biomass pyrogenation gasification and purification method |
| CN101955803A (en) * | 2009-07-15 | 2011-01-26 | 山东科技大学 | Low-rank coal carbonization method |
| CN102021038A (en) * | 2009-09-14 | 2011-04-20 | 新奥科技发展有限公司 | Multilayer fluidized bed gasification furnace for preparing methane-rich gas by coal gasification |
| CN202766491U (en) * | 2012-08-14 | 2013-03-06 | 严大春 | Rubbish dry distillation, pyrolyzation, gasification and power generation system |
| CN105524662A (en) * | 2014-10-22 | 2016-04-27 | 中国石油化工股份有限公司大连石油化工研究院 | Method for preparing synthetic gas through microwave pyrolysis and gasification of biomass |
| CN205088193U (en) * | 2015-09-18 | 2016-03-16 | 广东碳中和能源开发有限公司 | Up -draft fixed bed gasifier of preparation low temperature, low tar gas |
| CN206033677U (en) * | 2016-08-23 | 2017-03-22 | 中石化炼化工程（集团）股份有限公司 | Powder coal carbonization device |
| CN107227176A (en) * | 2017-06-28 | 2017-10-03 | 孔令增 | A kind of method that closed gas generator hypomere stove pure oxygen gasification epimere stove destructive distillation combination carries out small beans continuous gasification |
| CN107760387A (en) * | 2017-10-30 | 2018-03-06 | 中国科学院广州能源研究所 | A kind of high nitrogen biomass castoff gasification, and combustion heating system and technique |
| CN108865306A (en) * | 2018-06-27 | 2018-11-23 | 新奥科技发展有限公司 | A kind of coke discharging and coupling technique is slurried |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101985568B (en) | Two-stage oxygen supply dry slag removal pressurized gas flow bed gasification furnace | |
| CN101250419B (en) | Low-temperature dry distillation process with coal gas internal heat | |
| CN204237743U (en) | A kind of New type coal gas retort | |
| CN103740409A (en) | Multi-stage gas distribution high-temperature coal gasification device and method | |
| CN101818071B (en) | Coal pyrolysis reactor | |
| CN203174054U (en) | Oxygen-enriched gasification furnace | |
| CN110591745A (en) | Pyrolysis-gasification integrated device and process | |
| CN102827619B (en) | Integrated gas retort | |
| CN100362084C (en) | Internal and external circulation coal gasification method and device | |
| CN104531222B (en) | Pyrolysis of coal system and method using spouted bed reactor | |
| CN105038827B (en) | A kind of low order broken coal sub-prime classification gradient utilization system and method | |
| CN103509605B (en) | Method and device using high temperature air and high temperature steam as gasification agents for coal gas production | |
| CN107083249A (en) | A kind of fine coal prepares air flow bed pyrolysis oven, the system and method vented one's spleen rich in methane thermal | |
| CN102492477B (en) | Hierarchical oxygen supply and controllable flame coal water slurry entrained bed combined nozzle | |
| CN107418632B (en) | Gasification system and gasification method for simultaneously producing methane pyrolysis gas and synthesis gas | |
| KR20140080453A (en) | Circulating Fluidized Bed Gasifier Equipped with Heat Exchanger Therein | |
| CN110776959A (en) | Integrated pyrolysis gasification device and method for seed coal | |
| CN204589098U (en) | Utilize the pyrolysis of coal system of spouted bed bioreactor | |
| CN113278437A (en) | Rising temperature sudden-falling type double-pyrolysis-section internal heating type moving bed coal vertical pyrolysis furnace | |
| CN210856013U (en) | Novel low-calorific-value slurry fuel gasification furnace | |
| CN210711404U (en) | Pyrolysis-gasification integrated device | |
| CN204939395U (en) | A kind of low order broken coal sub-prime classification gradient utilization system | |
| CN107840335B (en) | Continuous pyrolysis and activation integrated device for hydrocarbon-containing solid raw materials | |
| CN110240944B (en) | Method and device for co-producing coal gas and semicoke by high-temperature pyrolysis and oxygen-enriched gasification under normal pressure of pulverized coal | |
| CN111394137A (en) | Gasification and pyrolysis coupling device and gasification and pyrolysis method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200211 |