Low-heating-value biomass gas high-temperature kiln calcining device

Abstract

The utility model provides a low-heating-value biomass gas high-temperature kiln calcining device, and belongs to the technical field of renewable energy sources. Comprising a feeding module, a gasification module, an oxygen-enriched supply module, a calcination raw material drying furnace combustion module and a calcination kiln combustion module. The feeding module comprises a biomass feeding system and a biomass conveyor; the gasification module comprises a biomass gasification generator and a gas fan; the oxygen-enriched supply module comprises an oxygen-enriched generator, an oxygen-enriched gasification fan and an oxygen-enriched combustion fan. The biomass oxygen-enriched gasification technology is adopted, the heat value of the biogas is increased, energy replacement of the calcination raw material drying furnace is achieved, meanwhile, the biogas oxygen-enriched combustion technology is adopted, the combustion efficiency is improved, the combustion temperature is further increased, energy replacement of the calcination kiln is achieved, and energy resources are saved. Through the special biogas, natural gas and oxygen-enriched mixed combustor and the temperature flow interlocking loop, the stability and flexibility of the system are enhanced, and automatic adjustment of energy is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of renewable energy, in particular to a low calorific value biomass gas high temperature kiln calcining device. Background Art

[0002] The energy sources used by industrial kilns are currently electricity, coal, oil and gas. The heating method of electric kilns is to convert electrical energy into thermal energy, while the heating method of coal-fired, oil-fired and gas-fired kilns is to heat the products after the fuel is burned. Compared with the first two industrial kilns, gas-fired kilns have less pollution, are easier to control, have fewer combustion by-products, and are easier to implement special processes. They are widely used in manufacturing industries such as machinery, ceramics, aluminum products, molds, and glass.

[0003] High-temperature calcination process is a commonly used method for preparing materials. This process heats the raw materials at high temperature to cause a chemical reaction to form a new material structure. During the combustion process, the furnace temperature can reach above 1400°C. Driven by policies such as carbon peak, carbon neutrality, and air pollution prevention and control, natural gas, as one of the important clean energy sources, will see further growth in consumption, especially in winter. The demand for heating gas has increased significantly, natural gas is in short supply, prices have risen, and supply cuts and purchase restrictions are common. At the same time, the combustion temperature of alternative energy sources is not enough and is only suitable for low and medium temperature kilns, but cannot meet the furnace temperature requirements of high-temperature kilns. In order to address the above problems and defects, there is an urgent need for a low calorific value biomass gas high-temperature kiln calcination device. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a low calorific value biomass gas high-temperature kiln calcining device to solve the existing problem that under the drive of carbon peak, carbon neutrality and air pollution prevention and control policies, natural gas, as one of the important clean energy sources, its consumption will further increase, especially in winter, the demand for heating gas will increase significantly, natural gas will be in short supply, prices will rise, and supply and purchase restrictions will be common. At the same time, the combustion temperature of alternative energy is not enough, and it is only suitable for low and medium temperature kilns, and cannot meet the furnace temperature requirements of high-temperature kilns.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A low calorific value biomass gas high temperature kiln calcining device, comprising: a feeding module, a gasification module, an oxygen-enriched supply module, a calcining raw material drying furnace combustion module and a calcining kiln combustion module; the feeding module comprises a biomass feeding system and a biomass conveyor; the gasification module comprises a biomass gasification generator and a gas blower; the oxygen-enriched supply module comprises an oxygen-enriched generator, an oxygen-enriched gasification blower and an oxygen-enriched combustion blower; the calcining raw material drying furnace combustion module comprises a calcining raw material drying furnace body, a supplementary combustion burner, a supplementary combustion blower and a biogas temperature flow interlock, the biogas temperature flow interlock comprises a thermocouple, a temperature flow interlock circuit and a biomass gas flow regulating valve; the calcining kiln combustion module comprises a calcining kiln body, a mixing burner and a natural gas temperature flow interlock.

[0007] The biomass raw materials used in the biomass feeding system are 3-8 cm wood chips with a moisture content of <30%.

[0008] The oxygen-enriched generator generates an oxygen-enriched concentration of not less than 90%.

[0009] The supplementary combustion burner is a two-medium gas ratio combustion device of biogas and air. The biogas detects the furnace temperature through the high-temperature section of the calcining raw material drying furnace body and feeds back to the temperature flow interlocking loop to control the biomass gas flow regulating valve to adjust the flow.

[0010] The mixed burner is a three-medium gas mixed combustion device with a proportioned mixture of biogas, natural gas and oxygen-enriched gas.

[0011] The biomass gasification generator uses oxygen-rich gas as the gasification agent.

[0012] Compared with the prior art, the utility model has at least the following beneficial effects:

[0013] 1. In the above scheme, biomass oxygen-enriched gasification technology is used to improve the calorific value of biogas and realize energy substitution of calcining raw material drying furnace. At the same time, biogas oxygen-enriched combustion technology is adopted to improve combustion efficiency and further increase combustion temperature to realize energy substitution of calcining kiln. Through special biogas, natural gas, oxygen-enriched mixed burner and temperature and flow interlocking loop, the stability and flexibility of the system are enhanced, and the automatic regulation of energy is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0015] Figure 1 This is a schematic diagram of the process flow of calcining low calorific value biomass in a gas-fired high-temperature kiln;

[0016] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0017] Figure 3 for Figure 2 Enlarged structural diagram at B in the middle.

[0018] [Reference Signs]

[0019] 1. Feeding module; 11. Biomass feeding system; 12. Biomass conveyor;

[0020] 2. Gasification module; 21. Biomass gasification generator; 22. Gas blower;

[0021] 3. Oxygen-enriched supply module; 31. Oxygen-enriched generator; 32. Oxygen-enriched gasification blower; 33. Oxygen-enriched combustion blower;

[0022] 4. Combustion module of calcined raw material drying furnace; 41. Main body of calcined raw material drying furnace; 42. Supplementary combustion burner; 43. Supplementary combustion fan; 44. Biogas temperature and flow interlocking; 441. Thermocouple; 442. Temperature and flow interlocking loop; 443. Biomass gas flow regulating valve;

[0023] 5. Calcination kiln combustion module; 51. Calcination kiln body; 52. Mixing burner; 53. Natural gas temperature and flow interlock.

[0024] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0025] The following is a detailed description of a low calorific value biomass gas high temperature kiln calcining device provided by the utility model in combination with the drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are listed as the best and preferred embodiments, and other alternatives can also be used by technicians in some known technical fields; and the drawings are only for more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0026] like Figure 1 , Figure 2 and Figure 3As shown, an embodiment of the utility model provides a low calorific value biomass gas high temperature kiln calcining device, comprising: a feeding module 1, a gasification module 2, an oxygen-enriched supply module 3, a calcining raw material drying furnace combustion module 4 and a calcining kiln combustion module 5; the feeding module 1 includes a biomass feeding system 11 and a biomass conveyor 12; the gasification module 2 includes a biomass gasification generator 21 and a gas blower 22; the oxygen-enriched supply module 3 includes an oxygen-enriched generator 31, an oxygen-enriched gasification blower 32 and an oxygen-enriched combustion blower 33; the calcining raw material drying furnace combustion module 4 includes a calcining raw material drying furnace body 41, a supplementary combustion burner 42, a supplementary combustion blower 43 and a biogas temperature flow interlock 44, the biogas temperature flow interlock 44 includes a thermocouple 441, a temperature flow interlock loop 442 and a biomass gas flow regulating valve 443; the calcining kiln combustion module 5 includes a calcining kiln body 51, a mixing burner 52 and a natural gas temperature flow interlock 53.

[0027] like Figure 1 and Figure 2 As shown, the biomass raw material used by the biomass fuel system 11 is 3-8 cm wood chips with a moisture content of <30%. By limiting the biomass raw material used by the biomass feeding system 11, it is beneficial to improve the utilization rate of the biomass raw material and improve the combustion efficiency.

[0028] like Figure 1 As shown, the oxygen-rich concentration produced by the oxygen-rich generator 31 is not less than 90%. By limiting the concentration produced by the oxygen-rich generator 31, it is beneficial to further increase the combustion temperature.

[0029] like Figure 1 and Figure 3 As shown, the supplementary combustion burner 42 is a two-medium gas ratio combustion device of biogas and air. The biogas detects the furnace temperature through the high temperature section thermocouple 441 of the calcination raw material drying furnace body 41, and feeds back to the temperature flow interlocking loop 442 to control the biomass gas flow regulating valve 443 to adjust the flow, which is conducive to realizing automatic control of the biogas amount.

[0030] like Figure 1 and Figure 2 As shown, the mixed burner 52 is a three-medium gas ratio mixed combustion device of biogas, natural gas and oxygen-enriched gas, which is conducive to realizing automatic control of the amount of natural gas, and the natural gas plays the role of ignition and temperature regulation.

[0031] like Figure 1 and Figure 2As shown, the biomass gasification generator 21 uses oxygen-rich gasification as the gasification agent. Oxygen-rich gasification can reduce the N2 content in the fuel gas. At the same time, oxygen-rich gasification can increase the thickness of the oxidation layer, release a large amount of reaction heat, and increase the temperature of the entire gasification reaction process, so that more tar can be removed through combustion and pyrolysis, and the calorific value of biogas can be increased to 9000kJ / m3.

[0032] The technical solution provided by the utility model is that during operation, the biomass feeding system 11 and the biomass conveyor 12 are used for feeding, and then the biogas generated in the biomass gasification generator 21 is respectively transported to the mixing burner 52 and the supplementary combustion burner 42 by the gas blower 22, the oxygen generated by the oxygen-enriched generator 31 is transported to the biomass gasification generator 21 by the oxygen-enriched gasification blower 32, and is transported to the mixing burner 52 by the oxygen-enriched combustion blower 33, the biogas transported by the gas blower 22 and the air supplied by the supplementary combustion blower 43 are mixed in the supplementary combustion burner 42, and enter the calcination raw material drying furnace body 41 for combustion, the biogas transported by the gas blower 22 and the oxygen transported by the oxygen-enriched combustion blower 33 are mixed in the mixing burner 52, and enter the calcination kiln body 51 for combustion;

[0033] When the biogas supply is sufficient, it can replace all natural gas. When the biogas supply is insufficient, the natural gas amount is adjusted to adjust the ratio of the three gases in the mixed burner 52, and the natural gas and biogas are mixed to maintain the furnace temperature and achieve a stable supply of energy.

[0034] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0035] A person skilled in the art will appreciate that all or part of the steps in the above-mentioned embodiment method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A low calorific value biomass gas high temperature kiln calcining device, characterized in that: include: A feeding module (1), a gasification module (2), an oxygen-enriched supply module (3), a calcining raw material drying furnace combustion module (4) and a calcining kiln combustion module (5); The feeding module (1) comprises a biomass feeding system (11) and a biomass conveyor (12); The gasification module (2) comprises a biomass gasification generator (21) and a gas blower (22); The oxygen-enriched supply module (3) comprises an oxygen-enriched generator (31), an oxygen-enriched gasification blower (32) and an oxygen-enriched combustion blower (33); The calcining raw material drying furnace combustion module (4) comprises a calcining raw material drying furnace body (41), a supplementary combustion burner (42), a supplementary combustion fan (43) and a biomass gas temperature flow interlock (44); the biomass gas temperature flow interlock (44) comprises a thermocouple (441), a temperature flow interlock loop (442) and a biomass gas flow regulating valve (443); The calcining kiln combustion module (5) comprises a calcining kiln body (51), a mixing burner (52) and a natural gas temperature flow linkage (53).

2. The low calorific value biomass gas high temperature kiln calcining device according to claim 1 is characterized in that: The biomass raw material used in the biomass feeding system (11) is 3-8 cm wood chips with a moisture content of less than 30%.

3. The low calorific value biomass gas high temperature kiln calcining device according to claim 1 is characterized in that: The oxygen-enriched generator (31) generates an oxygen-enriched concentration of not less than 90%.

4. The low calorific value biomass gas high temperature kiln calcining device according to claim 1 is characterized in that: The supplementary combustion burner (42) is a two-medium gas ratio combustion device of biogas and air. The biogas detects the furnace temperature through the high temperature section of the calcining raw material drying furnace body (41), and feeds back to the temperature flow interlocking loop (442) to control the biomass gas flow regulating valve (443) to adjust the flow.

5. The low calorific value biomass gas high temperature kiln calcining device according to claim 1 is characterized in that: The mixed burner (52) is a device for mixed combustion of biogas, natural gas and oxygen-enriched gas in a proportioned manner.

6. The low calorific value biomass gas high temperature kiln calcining device according to claim 1 is characterized in that: In the biomass gasification generator (21), oxygen-enriched gas is used as the gasification agent.

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