Pretreatment system applied to online measurement of crushed coal pressurized gasification furnace sample gas

Abstract

The utility model relates to the technical field of crushed coal pressurized gasification furnace sample gas treatment, and provides a pretreatment system applied to online measurement of crushed coal pressurized gasification furnace sample gas, which comprises a sample gas conveying pipeline, an analysis instrument, a discharge pipeline and a safety valve, a first valve, an oil removal and separation device, a gas filter, a flow limiting pore plate, a first-stage precise pressure regulating valve, a refrigerator, a gas-liquid separator and a flow meter are sequentially arranged on the sample gas conveying pipeline in the gas flowing direction, and raw gas sample gas in the gasification furnace is sequentially subjected to a series of pretreatment including oil removal, impurity removal, pressure stabilization, gas-water separation and the like; and finally, the gas enters an analysis instrument for component analysis, so that measurement sample gas with better quality is provided for subsequent online monitoring, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of coal gasification furnace sample gas processing technology, and specifically relates to a pretreatment system applied to online measurement of coal gasification furnace sample gas. BACKGROUND

[0002] The gasification furnace is a kind of equipment for converting solid fuel (such as coal, biomass, etc.) into gaseous fuel. It generates gaseous fuel mainly composed of carbon monoxide, hydrogen, methane, etc. by high temperature and gasification agent (usually oxygen and water vapor) to make fuel chemical reaction. The gasification furnace is widely used in industrial production, energy supply and rural life and other fields.

[0003] In the gasification production process of the coal gasification furnace, the composition of the crude coal gas sample gas produced by the gasification furnace needs to be continuously monitored online to accurately and timely reflect the production conditions in the furnace, and the production process is adjusted according to the monitored production conditions.

[0004] However, the crude coal gas sample gas produced by the gasification furnace has complex composition and contains a large amount of coal tar, dust, water, phenol, benzene and sulfide impurities, which will seriously damage the analytical instruments, affect the monitoring efficiency, and further affect the production efficiency. UTILITY MODEL

[0005] The utility model provides a kind of pretreatment system applied to online measurement of coal gasification furnace sample gas, and the crude coal gas sample gas produced by the gasification furnace is pretreated by oil removal, dust removal and the like to reduce the damage of sample gas to analytical instrument, improve production efficiency.

[0006] The utility model provides a kind of pretreatment system applied to online measurement of coal gasification furnace sample gas, and the crude coal gas sample gas produced by the gasification furnace is pretreated by oil removal, dust removal and the like to reduce the damage of sample gas to analytical instrument, improve production efficiency.

[0007] Sample gas conveying pipeline, the sample gas conveying pipeline includes sample gas inlet and sample gas outlet, first valve, oil removal separation device, gas filter, flow limiting orifice plate, first stage precision pressure regulating valve, refrigerator, gas-liquid separator, flowmeter are sequentially provided on the sample gas conveying pipeline along the flow direction of gas;

[0008] Analytical instrument, the sample gas outlet is connected with the analytical instrument;

[0009] Discharge pipeline, the discharge pipeline is connected with the sample gas conveying pipeline by first pipeline, and the first pipeline is arranged between the gas-liquid separator and the flowmeter;

[0010] Safety valve, the inlet of the safety valve is connected with the sample gas conveying pipeline by second pipeline, and the outlet of the safety valve is connected with the discharge pipeline by third pipeline.

[0011] The pretreatment system applied to the online measurement of sample gas of a crushed coal pressurized gasification furnace comprises an oil removal separation device,

[0012] The tank body is provided with a first gas inlet at the bottom, and a first separation plate, a second separation plate, a liquid inlet pipe, a third separation plate, a separation chamber and a cooling cavity are sequentially arranged in the tank body from bottom to top, a plurality of separation holes are uniformly distributed on the first separation plate, a second gas inlet hole is arranged at the center of the second separation plate, the liquid inlet pipe is arranged above the second separation plate, a third gas inlet hole is arranged at the center of the third separation plate, the separation chamber separates the top of the tank body into the cooling cavity, an air inlet pipe is arranged on the side wall of the cooling cavity, and a cooling pipe is arranged in the cooling cavity.

[0013] The radial section shape of the second separation plate is conical, and the second separation plate is inclined downward from the central axis to the direction away from the central axis.

[0014] The radial section shape of the third separation plate is conical, and the third separation plate is inclined downward from the central axis to the direction away from the central axis.

[0015] The radial section shape of the separation chamber is hexagonal, the bottom of the separation chamber is an inlet, and the top of the separation chamber is an outlet, and the inlet of the cooling pipe is connected with the outlet of the separation chamber.

[0016] The pretreatment system applied to the online measurement of sample gas of a crushed coal pressurized gasification furnace further comprises a second-stage precision pressure regulating valve, and the second-stage precision pressure regulating valve is arranged between the gas-liquid separator and the flow meter.

[0017] The pretreatment system applied to the online measurement of sample gas of a crushed coal pressurized gasification furnace comprises a sample gas conveying pipeline, an analysis instrument, a discharge pipeline and a safety valve, a first valve, an oil removal separation device, a gas filter, a flow limiting orifice plate, a first-stage precision pressure regulating valve, a refrigerator, a gas-liquid separator and a flow meter are sequentially arranged on the sample gas conveying pipeline along the flow direction of gas, and the crude coal gas sample in the gasification furnace is sequentially subjected to a series of pretreatments such as oil removal, impurity removal, pressure stabilization and gas-water separation, and finally enters the analysis instrument to perform component analysis, thereby providing measurement sample gas with better quality for subsequent online monitoring and improving production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Fig. 1 Figure 1 is a schematic diagram of the pretreatment system applied to the sample gas online measurement of the coal pressurized gasification furnace in the embodiment of the present application;

[0020] Fig. 2 Figure 1 is a schematic diagram of the pretreatment system applied to the sample gas online measurement of the coal pressurized gasification furnace in the embodiment of the present application;

[0021] Reference signs:

[0022] 1, sample gas conveying pipeline; 11, first valve; 12, oil removal separation device; 121, tank body; 122, gas inlet; 123, first separation plate; 1231, separation hole; 124, second separation plate; 125, liquid inlet pipe; 126, third separation plate; 127, separation chamber; 128, cooling cavity; 129, gas inlet pipe; 130, cooling pipe; 13, gas filter; 14, flow limiting orifice plate; 15, first stage precision pressure regulating valve; 16, refrigerator; 17, gas-liquid separator; 18, flowmeter; 19, second stage precision pressure regulating valve; 2, analysis instrument; 3, discharge pipeline; 4, safety valve. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present application more clear, the following will combine the drawings in the present application to clearly and completely describe the technical solutions in the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0024] In the description of the present application, it should be understood that the terms "upper", "lower", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0025] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0026] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and examples.

[0027] The gasifier is a device for converting solid fuel (such as coal, biomass, etc.) into gaseous fuel. It generates gaseous fuel mainly composed of carbon monoxide, hydrogen, methane, etc. by chemical reaction of fuel under the action of high temperature and gasifying agent (usually oxygen and water vapor). The gasifier is widely used in industrial production, energy supply and rural life, etc.

[0028] In the process of coal gasification in a pressurized gasifier, the composition of the raw coal gas sample produced by the gasifier needs to be continuously monitored online to accurately and timely reflect the production conditions in the furnace, and the production process is adjusted according to the monitored production conditions.

[0029] However, the composition of the raw coal gas sample produced by the gasifier is complex and contains a large amount of coal tar, dust, water, phenol, benzene and sulfide impurities, which can seriously damage the analytical instruments, affect the monitoring efficiency, and further affect the production efficiency.

[0030] In the embodiment of the present application, the raw coal gas sample in the gasifier is sequentially pretreated by oil removal, impurity removal, pressure stabilization, gas-water separation, etc. Finally, it enters the analytical instrument for component analysis, providing better quality measurement sample gas for subsequent online monitoring and improving production efficiency.

[0031] The present application will be described below in conjunction with Figs. 1-2 A pretreatment system for online measurement of a raw coal gas sample in a pressurized gasifier is described.

[0032] The utility model embodiment provides a kind of pretreatment system applied to coal crushed pressurized gasification furnace sample gas online measurement, including sample gas delivery pipeline 1, analysis instrument 2, discharge pipeline 3 and safety valve 4, sample gas delivery pipeline 1 is used to deliver sample gas in gasification furnace to analysis instrument 2 inside and carries out component analysis, sample gas delivery pipeline 1 includes sample gas inlet and sample gas outlet, first valve 11, oil removal separation device 12, gas filter 13, flow restrictor orifice plate 14, first stage precision pressure regulating valve 15, refrigerator 16, gas-liquid separator 17 and flowmeter 18 are sequentially provided on sample gas delivery pipeline 1 along the flow direction of gas, the sample gas outlet of sample gas delivery pipeline 1 is connected with analysis instrument 2, discharge pipeline 3 is connected with sample gas delivery pipeline 1 by first pipeline, first pipeline is arranged between gas-liquid separator 17 and flowmeter 18, the inlet of safety valve 4 is connected with sample gas delivery pipeline 1 by second pipeline, and the outlet of safety valve 4 is connected with discharge pipeline 3 by third pipeline.

[0033] In the embodiment, oil removal separation device 12 can be specifically provided as condensation oil removal device, and the oil impurities in sample gas are preliminarily removed by heat exchange condensation principle, refrigerator 16 is two-stage vortex refrigerator, the opening and closing of first valve 11 are used to control the delivery of sample gas in sample gas delivery pipeline 1, oil removal separation device 12 is used to remove tar in sample gas by water washing, sample gas is filtered after water washing by oil removal separation device 12, and enters gas filter 13 to filter dust and other impurities in sample gas, sample gas is subjected to flow restriction by flow restrictor orifice plate 14 after passing through gas filter 13, and is cooled in refrigerator 16 after pressure regulating by first stage precision pressure regulating valve 15, the pressure impact of high-pressure sample gas on subsequent instrument and analysis instrument can be reduced after pressure regulating by first stage precision pressure regulating valve 15, the cooled sample gas is subjected to gas-liquid separation in gas-liquid separator 17, to further improve the quality of sample gas, provide better quality measurement sample gas for online monitoring of subsequent analysis instrument 2, and improve production efficiency. The liquid separated by gas-liquid separator 17 is discharged into sewage pipeline, and the separated sample gas is adjusted by flowmeter 18 and then enters analysis instrument 2 for analysis, and the excess sample gas is delivered to discharge pipeline 3 in first pipeline for discharge treatment. Safety valve 4 is further provided on sample gas delivery pipeline 1, safety valve 4 is connected between gas-liquid separator 17 and flowmeter 18 by second pipeline, safety valve 4 provides overpressure protection for sample gas delivery pipeline 1, and sample gas is directly discharged into discharge pipeline 3 by safety valve 4 when the pressure in sample gas delivery pipeline 1 is too high, to ensure the safe operation of system.

[0034] The pretreatment system applied to the sample gas online measurement of the coal pulverizing pressurized gasifier in the embodiment comprises a sample gas conveying pipeline 1, an analysis instrument 2, a discharge pipeline 3 and a safety valve 4, the first valve 11, the oil removal separation device 12, the gas filter 13, the flow limiting orifice plate 14, the first-stage precision pressure regulating valve 15, the refrigerating device 16, the gas-liquid separator 17 and the flowmeter 18 are sequentially arranged on the sample gas conveying pipeline 1 along the flow direction of the gas, the crude coal gas sample in the gasifier is sequentially subjected to a series of pretreatments such as oil removal, impurity removal, pressure stabilization, gas-water separation and the like, and finally enters the analysis instrument 2 to perform component analysis, thereby providing the subsequent online monitoring with the measurement sample gas of better quality and improving the production efficiency.

[0035] As shown in Fig. 2 some embodiments of the utility model, the oil removal separation device 12 includes the jar body 121, the bottom of jar body 121 is equipped with the first air inlet 122, the inside of jar body 121 is sequentially equipped with first separation plate 123, second separation plate 124, liquid inlet pipe 125, third separation plate 126, separation chamber 127 and cooling cavity 128 from bottom to top, the first separation plate 123 is uniformly distributed with a plurality of separation holes 1231, the center of second separation plate 124 is equipped with the second air inlet hole, liquid inlet pipe 125 is arranged above second separation plate 124, liquid inlet pipe 125 is used to transport salt-free water to the inside of jar body 121, the center of third separation plate 126 is equipped with the third air inlet hole, separation chamber 127 separates the top of jar body 121 into cooling cavity 128, the lateral wall of cooling cavity 128 is equipped with air inlet pipe 129, air inlet pipe 129 is used to transport cold gas to the inside of cooling cavity 128, cooling cavity 128 is equipped with cooling pipe 130, the inlet of cooling pipe 130 is connected with separation chamber 127, and the outlet of cooling pipe 130 is arranged on the lateral wall of cooling cavity 128.

[0036] Specific oil removal process is as follows: sample gas enters the inside of jar body 121 from the bottom first air inlet 122, after being dispersed by the plurality of separation holes 1231 uniformly distributed on the first separation plate 123, uniformly distributes in the inside of jar body 121, contacts with the salt-free water flowing out of liquid inlet pipe 125, and is subjected to oil removal under the action of second separation plate 124, then flows upward through the second air inlet hole in the center of second separation plate 124, continues to be subjected to oil removal under the action of third separation plate 126, then enters separation chamber 127 through the third air inlet hole in the center of third separation plate 126 to continue oil removal treatment, the sample gas in separation chamber 127 enters the inside of cooling pipe 130 in cooling cavity 128 through the outlet of separation chamber 127, cooling pipe 130 is spirally arranged, the sample gas is subjected to primary cooling by heat exchange with the cold gas in cooling cavity 128 in cooling pipe 130, and flows out from the outlet of cooling pipe 130 after cooling.

[0037] The first separation plate 123, the second separation plate 124, the liquid inlet pipe 125, the third separation plate 126 and the separation chamber 127 are sequentially arranged in the tank body 121, so that the sample gas is subjected to multi-stage oil removal separation, and the cooling cavity 128 is used for cooling the sample gas, thereby providing the measurement sample gas with better quality for subsequent online monitoring and improving production efficiency.

[0038] Further, in order to improve the oil removal efficiency, the radial cross section shape of the second separation plate 124 is conical, and the second separation plate 124 is inclined downward from the central axis to the direction away from the central axis, thereby improving the oil removal efficiency. The radial cross section shape of the third separation plate 126 is also conical, and the third separation plate 126 is inclined downward from the central axis to the direction away from the central axis, thereby improving the oil removal efficiency. Meanwhile, the radial cross section shape of the separation chamber 127 is hexagonal, the bottom of the separation chamber 127 is the inlet, the top is the outlet, and the inlet of the cooling pipe 130 is connected with the outlet of the separation chamber 127.

[0039] In some embodiments of the utility model, the pretreatment system applied to the sample gas online measurement of the coal pressurized gasification furnace further comprises a second-stage precision pressure regulating valve 19, which is arranged between the gas-liquid separator 17 and the flow meter 18, and the sample gas in the sample gas conveying pipeline 1 is regulated in pressure again, so that the pressure impact of the high-pressure sample gas on the rear instrument and the analysis instrument is further reduced.

[0040] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A pretreatment system for online measurement of sample gas from a crushed coal pressurized gasifier, characterized in that: include: A sample gas delivery pipeline (1), the sample gas delivery pipeline (1) comprising a sample gas inlet and a sample gas outlet, and the sample gas delivery pipeline (1) being provided with a first valve (11), an oil removal and separation device (12), a gas filter (13), a flow-limiting orifice plate (14), a first-stage precision pressure regulating valve (15), a refrigerator (16), a gas-liquid separator (17), and a flow meter (18) in sequence along the flow direction of the gas; An analytical instrument (2), wherein the sample gas outlet is connected to the analytical instrument (2); a discharge pipeline (3), the discharge pipeline (3) being connected to the sample gas delivery pipeline (1) via a first pipeline, the first pipeline being provided between the gas-liquid separator (17) and the flow meter (18); A safety valve (4), wherein the inlet of the safety valve (4) is connected to the sample gas delivery pipeline (1) through a second pipeline, and the outlet of the safety valve (4) is connected to the discharge pipeline (3) through a third pipeline.

2. The pretreatment system for online measurement of sample gas from a crushed coal pressurized gasifier according to claim 1 is characterized in that: The oil removal and separation device (12) comprises: A tank body (121) is provided with a first air inlet (122) at the bottom of the tank body (121), and a first separation plate (123), a second separation plate (124), a liquid inlet pipe (125), a third separation plate (126), a separation chamber (127) and a cooling chamber (128) are sequentially provided in the tank body (121) from bottom to top, a plurality of separation holes (1231) are evenly distributed on the first separation plate (123), a second air inlet is provided at the center of the second separation plate (124), and the liquid inlet pipe (125) is provided at the bottom of the tank body (121). A third air inlet is provided at the center of the third separation plate (126) above the second separation plate (124); the separation chamber (127) isolates the top of the tank body (121) into a cooling chamber (128); an air inlet pipe (129) is provided on the side wall of the cooling chamber (128); a cooling pipe (130) is provided in the cooling chamber (128); an inlet of the cooling pipe (130) is connected to the separation chamber (127); and an outlet of the cooling pipe (130) is provided on the side wall of the cooling chamber (128).

3. The pretreatment system for online measurement of sample gas from a crushed coal pressurized gasifier according to claim 2 is characterized in that: The radial cross-section of the second separation plate (124) is conical, and the second separation plate (124) is inclined downward from the central axis toward a direction away from the central axis.

4. The pretreatment system for online measurement of sample gas from a crushed coal pressurized gasifier according to claim 2 is characterized in that: The radial cross-section of the third separation plate (126) is conical, and the third separation plate (126) is inclined downward from the central axis toward a direction away from the central axis.

5. The pretreatment system for online measurement of sample gas from a crushed coal pressurized gasifier according to claim 2 is characterized in that: The radial cross-section of the separation chamber (127) is hexagonal, the bottom of the separation chamber (127) is an inlet, the top is an outlet, and the inlet of the cooling pipe (130) is connected to the outlet of the separation chamber (127).

6. The pretreatment system for online measurement of sample gas from a crushed coal pressurized gasifier according to claim 1 is characterized in that: It also includes a second-stage precision pressure regulating valve (19), which is arranged between the gas-liquid separator (17) and the flow meter (18).

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