CN111337623A - Experimental system for visually simulating multiphase flow and phase change of medium - Google Patents
Experimental system for visually simulating multiphase flow and phase change of medium Download PDFInfo
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- CN111337623A CN111337623A CN202010084535.7A CN202010084535A CN111337623A CN 111337623 A CN111337623 A CN 111337623A CN 202010084535 A CN202010084535 A CN 202010084535A CN 111337623 A CN111337623 A CN 111337623A
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- 230000008859 change Effects 0.000 title claims abstract description 28
- 239000002893 slag Substances 0.000 claims abstract description 48
- 238000002309 gasification Methods 0.000 claims abstract description 43
- 238000001816 cooling Methods 0.000 claims abstract description 29
- 238000004088 simulation Methods 0.000 claims abstract description 27
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 19
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 239000011521 glass Substances 0.000 claims description 19
- 238000004064 recycling Methods 0.000 claims description 12
- 239000000498 cooling water Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000006399 behavior Effects 0.000 abstract description 11
- 230000008021 deposition Effects 0.000 abstract description 10
- 230000005012 migration Effects 0.000 abstract description 5
- 238000013508 migration Methods 0.000 abstract description 5
- 238000005491 wire drawing Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 29
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 5
- 239000003245 coal Substances 0.000 description 3
- 230000000877 morphologic effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- 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
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/485—Entrained flow gasifiers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/04—Investigating sedimentation of particle suspensions
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- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Combustion & Propulsion (AREA)
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses an experimental system for visually simulating multiphase flow and phase change of a medium, which comprises: the system comprises a gas supply device, a temperature control device, a pressure device, a distribution tank, a gasification furnace, a synthetic gas cooling device, a flow meter and a blower; the outlet end of the gas supply device is connected with one end of the pressure device and is used for pressing out the slag simulation medium in the pressure device; the temperature control device is connected with one end of the pressure device and is used for heating the solid slag simulation medium in the pressure device to a liquid state; the distribution tank is connected with the pressure device and is used for receiving the liquid slag simulation medium pressed out from the pressure device; the distribution tank is connected with the gasification furnace and is used for transferring the liquid slag simulation medium; the bottom of the gasification furnace is provided with a synthesis gas cooling device; one end of the gasification furnace is connected with one end of the flowmeter, and the other end of the flowmeter is connected with the air blower. By applying the embodiment of the invention, the influence of the behaviors of wire drawing, migration, phase change and the like of the slag in the synthesis gas cooler on the deposition phase change of the slag in the environment without an internal heat source is revealed.
Description
Technical Field
The invention relates to the technical field of entrained flow coal gasification, in particular to an experimental system for visually simulating multiphase flow and phase change of a medium.
Background
At present, researches on slag deposition in entrained flow coal gasification mainly focus on slag deposition and layered flow behaviors in a gasification furnace and migration of slag at a slag hole of the gasification furnace, and researches on multiphase flow and complex heat transfer processes of the slag in a synthesis gas cooler with a radiation-chilling flow process belong to a starting stage.
The formation mechanism of slag formation through the actions of slag flowing, wire drawing, migration, phase change and the like in the environment without an internal heat source still has no relevant and clear explanation. In view of this, the experimental device is mainly based on the slag deposition phase transition behavior, is assisted by the multiphase flow and the complex heat transfer process, and can comprehensively reveal the interaction mechanism of the slag characteristic behavior and the slag bonding through the combination of the experimental simulation, the industrial sampling and the numerical simulation, and the experimental device mainly comprises: according to the slagging behavior of a water-cooled wall in a waste heat boiler, the morphological characteristics and the physicochemical characteristics of the molten slag in a cooler without an internal heat source are screened, wherein the morphological characteristics comprise the representation of parameters such as the porosity, the morphological state, the element composition and the like of the molten slag; deeply clarifying the influence mechanism of the characteristic behavior of the molten slag on the formation of the molten slag; the experimental device simulation can be combined with industrial data and numerical simulation, the critical condition of slag deposition phase change characteristic behavior in the industrial-scale gasification furnace is disclosed, and the structure of the radiation-chilling process entrained flow synthetic gas cooler is optimized.
Disclosure of Invention
The invention aims to provide an experimental system for visually simulating medium multiphase flow and phase change, which is used for knowing behavior rules and forming mechanisms of slag deposition phase change in an environment without an internal heat source and providing a design basis for a novel radiation-chilling process entrained flow gasification process.
In order to achieve the above object, the present invention provides an experimental system for visually simulating multiphase flow and phase change of a medium, comprising: the system comprises a gas supply device, a temperature control device, a pressure device, a distribution tank, a gasification furnace, a synthetic gas cooling device, a flow meter and a blower;
the outlet end of the gas supply device is connected with one end of the pressure device and is used for pressing out the slag simulation medium in the pressure device;
the temperature control device is connected with one end of the pressure device and is used for heating a solid slag simulation medium in the pressure device to a liquid state;
the distribution tank is connected with the pressure device and is used for receiving the liquid slag simulation medium pressed out from the pressure device;
the distribution tank is connected with the gasification furnace and is used for transferring the liquid slag simulation medium;
the bottom of the gasification furnace is provided with the synthesis gas cooling device;
one end of the gasification furnace is connected with one end of the flowmeter, and the other end of the flowmeter is connected with the air blower.
Preferably, the method further comprises the following steps: a cooling water circulating device is arranged on the cooling water circulating device,
and the cooling water circulation device is connected with the synthesis gas cooling device and is used for cooling the inner wall of the synthesis gas cooling device.
Preferably, the method further comprises the following steps: a recycling bin and an electronic scale;
the recycling bin is arranged at the lower part of the synthesis gas cooling device, and the recycling bin is arranged on the electronic scale.
Preferably, the glass tube connector also comprises a plurality of glass tubes and a plurality of connecting ports,
the distribution tank is connected with the gasification furnace through the plurality of glass tubes and the plurality of connecting ports;
the number of the glass tubes and the number of the connecting ports are at least six.
Preferably, the plurality of glass tubes and the plurality of connecting ports are uniformly and annularly distributed on the outer side of the gasification furnace.
Preferably, the slag-simulating medium in the pressure device is wax.
Preferably, the material of the synthetic gas cooling device is organic glass.
In one implementation mode, the flow speed of the gas in the gasification furnace is 5m/s-20 m/s.
In one implementation, the gas supply device is a steel gas cylinder, and the pressure device is a pressure tank.
By applying the experimental system for visually simulating the multi-phase flow and phase change of the medium, provided by the embodiment of the invention, the deposition form and the physical and chemical characteristics of slagging of the slag in the environment without an internal heat source are concerned, and the experimental system can be used for revealing the influence of actions such as wire drawing, migration, phase change and the like of the slag in the synthetic gas cooling device on the deposition phase change of the slag in the environment without the internal heat source. The method can not only know the behavior rule and the forming mechanism of the slag deposition phase change in the environment without an internal heat source, but also provide a design basis for the novel gasification process of the entrained flow bed with the radiation-chilling process, enrich the theoretical knowledge about the behavior rule of the slag in the gasification process of the entrained flow bed, and have practical significance for developing the coal chemical industry with high availability, high applicability and low energy consumption and material consumption.
Drawings
Fig. 1 is a schematic structural diagram of an experimental system for visually simulating multiphase flow and phase change of a medium according to an embodiment of the present invention.
FIG. 2 is an enlarged view of the bottom of the gasification furnace in FIG. 1 according to the embodiment of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Please refer to fig. 1-2. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The invention provides an experimental system for visually simulating multiphase flow and phase change of a medium as shown in fig. 1, which comprises: the system comprises a gas supply device 1, a temperature control device 2, a pressure device 3, a distribution tank 4, a gasification furnace 5, a synthetic gas cooling device 6, a flow meter 7 and a blower 8.
Specifically, the outlet end of the gas supply device 1 is connected with one end of the pressure device 3, and is used for pressing out the slag simulation medium in the pressure device 3; the temperature control device 2 is connected with one end of the pressure device 3 and is used for heating the solid slag simulation medium in the pressure device 3 to a liquid state; the distribution tank 4 is connected with the pressure device 3 and is used for receiving the liquid slag simulation medium pressed out from the pressure device 3; the distribution tank 4 is connected with the gasification furnace 5 and is used for transferring the liquid slag simulation medium; the bottom of the gasification furnace 5 is provided with the synthesis gas cooling device 6; one end of the gasification furnace 5 is connected with one end of the flow meter 7, and the other end of the flow meter 7 is connected with the air blower 8.
It can be understood that the gas supply device 1 supplies stable gas and pressure to the pressure device 3, and the slag simulation medium in the pressure device 3 is pressed into the distribution tank 4; the temperature control device 2 is used for heating and controlling the temperature, and heating the solid slag simulation medium in the pressure device 3 to a liquid state; the distribution tank 4 is connected with the gasification furnace 5, and the liquid slag simulation medium in the distribution tank 4 is transferred into the gasification furnace 5; the gasification furnace 5 is connected with the synthesis gas cooling device 6 by a flange, so that the air tightness is ensured, and different structural parameters can be provided; the blower 8 is used to simulate the gas flow in the gasification furnace 5, and the flow meter 7 is used to measure and control the air flow rate in the gasification furnace 5.
In an implementation manner of the present invention, the method further includes: and the cooling water circulation device 9 is connected with the synthesis gas cooling device 6, and is used for cooling the inner wall of the synthesis gas cooling device 6.
The cooling water circulation device 9 is used to cool the inner wall of the syngas cooling device 6 to maintain the temperature of the inner wall surface stable.
In one implementation, the method further comprises: a recycling bin 10 and an electronic scale 11.
Specifically, the recycling bin 10 is disposed at a lower portion of the syngas cooling device 6, and the recycling bin 10 is disposed on the electronic scale 11.
It can be understood that the recycling bin 10 is located below the syngas cooling device 6 and is used for collecting the slag simulation medium in the syngas cooling device 6, meanwhile, the recycling bin 10 is placed on the electronic scale 11, the electronic scale 11 can measure the mass of the slag simulation medium in the recycling bin 10 and is used for analyzing the deposition and slagging amount of the slag under different experimental conditions, and the camera 12 records the wire drawing, migration, phase change and other behaviors of the slag in the syngas cooling device 6.
Preferably, a plurality of glass tubes 13 and a plurality of connecting ports 14 are also included,
specifically, the distribution tank 4 is connected to the gasification furnace 5 through the plurality of glass tubes 13 and the plurality of connection ports 14;
the number of the glass tubes 13 and the number of the connecting ports 14 are at least six.
It is understood that the number of the plurality of glass tubes 13 and the plurality of connection ports 14 is at least six, and the liquid slag-simulating medium in the distribution tank 4 is stably and rapidly transferred to the gasification furnace 5 through the plurality of glass tubes 13 and the plurality of connection ports 14.
In one implementation, the glass tubes 13 and the connecting ports 14 are uniformly and annularly distributed outside the gasification furnace 5.
It should be noted that the connection structure composed of at least six sets of glass tubes 13 and connectors 14 is uniformly and annularly distributed outside the gasification furnace 5, so that the slag-simulating medium can uniformly and stably flow into the gasification furnace 5, as shown in fig. 2.
Specifically, the slag simulation medium in the pressure device 3 is wax.
In one implementation, the syngas cooling device 6 is made of organic glass.
Specifically, the flow velocity of the gas in the gasification furnace 5 is 5m/s-20 m/s.
It is understood that the blower 8 and the flow meter 7 control the gas flow rate in the gasification furnace 5 to be 5m/s to 20m/s, and air is used to simulate the synthesis gas.
In one implementation, the gas supply device 1 is a steel gas cylinder, and the pressure device 3 is a pressure tank.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. An experimental system for visually simulating multiphase flow and phase change of a medium is characterized by comprising: the system comprises a gas supply device (1), a temperature control device (2), a pressure device (3), a distribution tank (4), a gasification furnace (5), a synthetic gas cooling device (6), a flow meter (7) and a blower (8);
the outlet end of the gas supply device (1) is connected with one end of the pressure device (3) and is used for pressing out the slag simulation medium in the pressure device (3);
the temperature control device (2) is connected with one end of the pressure device (3) and is used for heating a solid slag simulation medium in the pressure device (3) to a liquid state;
the distribution tank (4) is connected with the pressure device (3) and is used for receiving the liquid slag simulation medium pressed out from the pressure device (3);
the distribution tank (4) is connected with the gasification furnace (5) and is used for transferring the liquid slag simulation medium;
the bottom of the gasification furnace (5) is provided with the synthesis gas cooling device (6);
one end of the gasification furnace (5) is connected with one end of the flowmeter (7), and the other end of the flowmeter (7) is connected with the air blower (8).
2. The experimental system for visually simulating multiphase flow and phase change of a medium according to claim 1, further comprising: a cooling water circulating device (9),
and the cooling water circulating device (9) is connected with the synthesis gas cooling device (6) and is used for cooling the inner wall of the synthesis gas cooling device (6).
3. The experimental system for visually simulating multiphase flow and phase change of a medium according to claim 1 or 2, further comprising: a recycling bin (10) and an electronic scale (11);
the recycling bin (10) is arranged at the lower part of the synthesis gas cooling device (6), and the recycling bin (10) is arranged on the electronic scale (11).
4. The experimental system for visually simulating the multiphase flow and phase change of media according to claim 1, further comprising a plurality of glass tubes (13) and a plurality of connection ports (14),
the distribution tank (4) is connected to the gasification furnace (5) through the plurality of glass tubes (13) and the plurality of connection ports (14);
the number of the glass tubes (13) and the number of the connecting ports (14) are at least six.
5. The experimental system for visually simulating the multiphase flow and the phase change of the medium as claimed in claim 4, wherein the glass tubes (13) and the connecting ports (14) are uniformly and annularly distributed outside the gasification furnace (5).
6. The experimental system for visually simulating the multiphase flow and the phase change of the medium as claimed in claim 1, wherein the slag simulation medium in the pressure device (3) is wax.
7. The experimental system for visually simulating the multiphase flow and the phase change of the medium as claimed in claim 1, wherein the synthetic gas cooling device (6) is made of organic glass.
8. The experimental system for visually simulating the multiphase flow and phase change of media according to claim 1, wherein the gas flow velocity in the gasification furnace (5) is 5m/s-20 m/s.
9. The experimental system for visually simulating the multiphase flow and the phase change of the medium as claimed in claim 1, wherein the gas supply device (1) is a steel cylinder, and the pressure device (3) is a pressure tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010084535.7A CN111337623A (en) | 2020-02-10 | 2020-02-10 | Experimental system for visually simulating multiphase flow and phase change of medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010084535.7A CN111337623A (en) | 2020-02-10 | 2020-02-10 | Experimental system for visually simulating multiphase flow and phase change of medium |
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| CN111337623A true CN111337623A (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010084535.7A Pending CN111337623A (en) | 2020-02-10 | 2020-02-10 | Experimental system for visually simulating multiphase flow and phase change of medium |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107025316A (en) * | 2016-08-24 | 2017-08-08 | 华东理工大学 | A kind of method for monitoring water wall gasifier temperature |
| CN108410510A (en) * | 2018-06-11 | 2018-08-17 | 宁夏神耀科技有限责任公司 | A kind of useless pot ash disposal Unitary coal gasification furnace |
-
2020
- 2020-02-10 CN CN202010084535.7A patent/CN111337623A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107025316A (en) * | 2016-08-24 | 2017-08-08 | 华东理工大学 | A kind of method for monitoring water wall gasifier temperature |
| CN108410510A (en) * | 2018-06-11 | 2018-08-17 | 宁夏神耀科技有限责任公司 | A kind of useless pot ash disposal Unitary coal gasification furnace |
Non-Patent Citations (3)
| Title |
|---|
| JIAN WANG ETAL: "Experimental and numerical study on slag deposition and growth at the slag tap hole region of Shell gasifier", 《FUEL PROCESSING TECHNOLOGY》 * |
| 张建法等: "Shell粉煤气化炉渣池内熔渣流动特性", 《化学工程》 * |
| 袁宏宇等: "气流床气化炉熔渣沉积模拟实验研究", 《华东理工大学学报（自然科学版）》 * |
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Application publication date: 20200626 |
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