Large-scale biomass fixed-bed gasification system and the measurement method of cold and hot gasification efficiency

Abstract

The invention discloses a large biomass fixed bed gasification system and a determination method of cold and hot gasification efficiency. A range finder is mounted at the top of the furnace body for directly monitoring the distance of down-moving fuel; the accurate fuel consumption Gd is obtained through calculation; an absorption device is mounted at the gas outlet end of the gas sampling point;vacuum pumps are mounted at gas outlet ends of the absorption devices; a gas meter is mounted at the gas outlet end of the vacuum pump; wherein a gas outlet end of the gas meter is connected with theswitching valve, one path of the switching valve is connected with the oxygen analyzer, a gas outlet of the other path of the switching valve is also connected with the gas bag, the gas chromatographand the online gas analyzer, and accurate fly ash mass tar mass, fly ash calorific value and tar calorific value are obtained after filter residues and filtrate obtained by the absorption device are treated. The invention has the beneficial effects that the measurement device and the measurement method are improved, and the measurement accuracy of the cold-hot gasification efficiency is improved.

Description

technical field

[0001] The invention relates to the field of gasification furnace quality control, in particular to a large-scale biomass fixed-bed gasification system and a method for measuring cold and hot gasification efficiency. Background technique

[0002] Using biomass as raw material (that is, fuel) to produce energy through thermochemical conversion technology has achieved large-scale operation and has a certain commercialization capacity. Some standard methods for fuel characteristics and equipment technical conditions have been formed. Among them, gasification efficiency is an important parameter for evaluating the performance of biomass gasifiers, which refers to the ratio of gasification gas heat to fuel heat. . The Ministry of Agriculture issued NY / T1017-2006 straw gasification device and system test method, which stipulates the performance test method of straw gasification device, and obtains the cold gasification efficiency and gasification efficiency of bio...

Examples

Embodiment 1

[0036] according to figure 1 As shown, this embodiment proposes a large-scale biomass fixed-bed gasification system, including a furnace body 1, a gas sampling point 18 installed on the furnace body 1, and a fire grate 3 installed at the lower end of the furnace body. A distance meter 32 is installed on the top, an absorption device 19 is installed at the gas outlet end of the gas sampling point 18, a vacuum pump 20 is installed at the gas outlet end of the absorption device 19, a gas meter 21 is installed at the gas outlet end of the vacuum pump 20, and a gas meter 21 is installed at the gas outlet end of the gas meter 21 and a switching valve 23 One way of the switch valve 23 is connected with the oxygen electrode 29 of the oxygen analyzer 22, and the other way of the gas outlet is also connected with the gas bag 25, the gas chromatograph 26 and the online gas analyzer 27, and the main pipeline of the gas outlet where the gas sampling point 18 is located is connected with the...

Embodiment 2

[0050] according to figure 2 As shown, this embodiment proposes a large-scale biomass fixed-bed gasification system, including a furnace body 1, a gas sampling point 18 installed on the furnace body 1, and a fire grate 3 installed at the lower end of the furnace body. A rangefinder 32 is installed on the top, an absorption device 19 is installed at the gas outlet of the gas sampling point 18, a vacuum pump 20 is installed at the gas outlet of the absorption device 19, a gas meter 21 is installed at the gas outlet of the vacuum pump 20, and a gas meter 21 is installed at the gas outlet of the gas meter 21 and a switching valve 23 One way of the switching valve 23 is connected with the oxygen electrode 29 of the oxygen analyzer 22, and the other gas outlet is also connected with the gas bag 25, the gas chromatograph 26 and the online gas analyzer 27, and the gas outlet of the gas sampling point 18 is connected with the induced draft fan 31 Connection, the bottom of the furnace ...

Embodiment 3

[0061] On the basis of the large-scale biomass fixed-bed gasification system proposed in the first and second embodiments, more preferably, the absorption device 19 is composed of at least 6 sampling bottles connected in series and placed in the ice-water mixture, each Each sampling bottle is filled with 150mL of absorbing liquid. The collected gas samples have a relatively high temperature. After passing through the absorbing device 19, the temperature of the absorbing liquid is easily raised rapidly to make the absorbing liquid volatilize. Therefore, the absorbing liquid must be placed in a low-temperature environment. Under low temperature conditions, the low temperature property is maintained, and multiple sampling bottles in series ensure that the fly ash and tar in the gas sample are fully extracted.

[0062] The feed port of the furnace body 1 is equipped with a feed mechanism, which includes a feed bin 6, a horizontal conveyor 7, a vertical elevator 8 and a screw feeder...

technical field

[0001] The invention relates to the field of gasification furnace quality control, in particular to a large-scale biomass fixed-bed gasification system and a method for measuring cold and hot gasification efficiency. Background technique

[0002] Using biomass as raw material (that is, fuel) to produce energy through thermochemical conversion technology has achieved large-scale operation and has a certain commercialization capacity. Some standard methods for fuel characteristics and equipment technical conditions have been formed. Among them, gasification efficiency is an important parameter for evaluating the performance of biomass gasifiers, which refers to the ratio of gasification gas heat to fuel heat. . The Ministry of Agriculture issued NY / T1017-2006 straw gasification device and system test method, which stipulates the performance test method of straw gasification device, and obtains the cold gasification efficiency and gasification efficiency of bio...

Examples

Embodiment 1

[0036] according to figure 1 As shown, this embodiment proposes a large-scale biomass fixed-bed gasification system, including a furnace body 1, a gas sampling point 18 installed on the furnace body 1, and a fire grate 3 installed at the lower end of the furnace body. A distance meter 32 is installed on the top, an absorption device 19 is installed at the gas outlet end of the gas sampling point 18, a vacuum pump 20 is installed at the gas outlet end of the absorption device 19, a gas meter 21 is installed at the gas outlet end of the vacuum pump 20, and a gas meter 21 is installed at the gas outlet end of the gas meter 21 and a switching valve 23 One way of the switch valve 23 is connected with the oxygen electrode 29 of the oxygen analyzer 22, and the other way of the gas outlet is also connected with the gas bag 25, the gas chromatograph 26 and the online gas analyzer 27, and the main pipeline of the gas outlet where the gas sampling point 18 is located is connected with the...

Embodiment 2

[0050] according to figure 2 As shown, this embodiment proposes a large-scale biomass fixed-bed gasification system, including a furnace body 1, a gas sampling point 18 installed on the furnace body 1, and a fire grate 3 installed at the lower end of the furnace body. A rangefinder 32 is installed on the top, an absorption device 19 is installed at the gas outlet of the gas sampling point 18, a vacuum pump 20 is installed at the gas outlet of the absorption device 19, a gas meter 21 is installed at the gas outlet of the vacuum pump 20, and a gas meter 21 is installed at the gas outlet of the gas meter 21 and a switching valve 23 One way of the switching valve 23 is connected with the oxygen electrode 29 of the oxygen analyzer 22, and the other gas outlet is also connected with the gas bag 25, the gas chromatograph 26 and the online gas analyzer 27, and the gas outlet of the gas sampling point 18 is connected with the induced draft fan 31 Connection, the bottom of the furnace ...

Embodiment 3

[0061] On the basis of the large-scale biomass fixed-bed gasification system proposed in the first and second embodiments, more preferably, the absorption device 19 is composed of at least 6 sampling bottles connected in series and placed in the ice-water mixture, each Each sampling bottle is filled with 150mL of absorbing liquid. The collected gas samples have a relatively high temperature. After passing through the absorbing device 19, the temperature of the absorbing liquid is easily raised rapidly to make the absorbing liquid volatilize. Therefore, the absorbing liquid must be placed in a low-temperature environment. Under low temperature conditions, the low temperature property is maintained, and multiple sampling bottles in series ensure that the fly ash and tar in the gas sample are fully extracted.

[0062] The feed port of the furnace body 1 is equipped with a feed mechanism, which includes a feed bin 6, a horizontal conveyor 7, a vertical elevator 8 and a screw feeder...

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