CN111366030A - Liquid oxygen combustion-supporting device of biomass particle steam boiler - Google Patents

Abstract

The invention relates to a liquid oxygen oxygen combustion-supporting device for a biomass particle steam boiler. Its characteristics are: a liquid oxygen oxygen burner is installed in one of the inner chambers of the economizer induced air duct or the boiler induced air duct, and the inlet and outlet ends of the liquid oxygen oxygen burner extend out of the inner cavity of the induced air duct respectively. The inlet end of the burner of the oxygen burner is connected to one end of the intake pipe through a connector, and the other end of the intake pipe is connected to the interface end of the inlet and outlet valve on the Dewar flask; the burner of the liquid oxygen oxygen burner The outlet end is connected with one end of the air outlet conveying pipe through a connecting head, and the other end of the air outlet conveying pipe is communicated with the air duct of the blower through the connecting head. The device has the advantages of safety, high efficiency, energy saving, simple structure and low cost. Because the liquid oxygen oxygen burner is arranged at the outlet of the tail flue of the boiler, the waste heat of the boiler itself is used to replace the heating device, which saves energy and saves costs; The device can be assembled and used on new and old boilers, so it is convenient for wide popularization and application.

Description

Biomass pellet steam boiler liquid oxygen oxygen combustion device

technical field

The invention relates to the technical field of combustion-supporting devices, in particular to a liquid-oxygen-oxygen combustion-supporting device for a biomass particle steam boiler.

Background technique

When the boiler is burning, it is generally necessary to have a combustion-supporting device to improve the combustion efficiency. However, in the prior art, the external air is directly introduced into the boiler to support combustion, but this method cannot be used in a very The combustion effect is greatly improved. Because the air contains water and other gases, the combustion is insufficient and black smoke is emitted, which seriously affects the air pollution and the environment, wastes a large amount of biomass raw materials, and greatly reduces the combustion support. This defect patent No. 2018215974467 invented a biomass pellet boiler combustion support device, which is equipped with oxygen production, vacuum, dehumidification, voltage stabilization, and preheating mechanisms in front of the boiler. The device increases the concentration of oxygen and dehumidifies, so that the The combustion-supporting effect is remarkable; however, this combustion-supporting device has a complex structure, a large area, and a high investment cost. Each set needs to invest more than 300,000 yuan, so it is not convenient for popularization and application.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a liquid oxygen and oxygen combustion support device for a biomass particle steam boiler with a simple structure, low cost, easy popularization and application, and remarkable combustion support effect, which overcomes the shortcomings of the above-mentioned prior art;

In order to achieve the above-mentioned purpose, the technical scheme adopted in the present invention is as follows: the device includes a boiler body, an economizer, a blower, a boiler induced air duct, an economizer induced air duct, a blower air duct, a Dewar bottle and its matching inlet and outlet. The liquid valve, the air inlet conveying pipe, and the air outlet conveying pipe are characterized in that: a liquid oxygen-oxygen burner is arranged in one of the inner chambers of the economizer induced air duct or the boiler induced air duct, and the burner inlet of the liquid oxygen and oxygen burner is provided. The end and the outlet end of the burner extend out of the inner cavity of the air duct respectively. The inlet end of the burner of the liquid oxygen oxygen burner is connected with one end of the intake pipe through a connector, and the other end of the intake pipe is connected to the Dewar flask. The interface ends of the liquid inlet and outlet valves are connected to each other; the outlet end of the burner of the liquid oxygen oxygen burner is connected to one end of the gas outlet conveying pipe through the connector, and the other end of the air outlet conveying pipe is connected to the air duct of the blower through the connector;

The above-mentioned liquid oxygen and oxygen combustion-supporting device for biomass particle steam boiler is characterized in that: the other end of the gas outlet conveying pipe is provided with a multi-head pipe which is connected with the conveying pipe, and the multi-head pipe is respectively connected with each branch pipe of the blower air duct. ;

The liquid oxygen and oxygen combustion-supporting device for a biomass pellet steam boiler is characterized in that: the air inlet conveying pipe is a stainless steel corrugated pipe; the air outlet conveying pipe is a red copper pipe;

The liquid oxygen and oxygen combustion support device for biomass particle steam boiler is characterized in that: the liquid oxygen and oxygen combustion supporter is made of a seamless metal tube that is bent back and forth on the same plane through multiple rounds to form a whole, and makes the combustion support The two ends of the inlet end of the burner and the outlet end of the burner respectively protrude out of the inner cavity of the air duct on one side of the whole; a fixing block is arranged on the uppermost curved pipe of the liquid oxygen and oxygen burner, and a fixed block is arranged between each curved pipe. The positioning plate is provided with a foot under the bent tube at the bottom of the liquid oxygen oxygen burner; the liquid oxygen oxygen burner is fixed in the inner cavity of the air duct through the fixing block and the foot;

The liquid oxygen-oxygen combustion-supporting device for a biomass pellet steam boiler is characterized in that: the liquid-oxygen-oxygen combustion-supporting device is made of a seamless metal tube, and the two ends of the seamless metal tube are respectively provided with the inlet end of the combustion-supporting device, the combustion-supporting device The outlet end of the combustor, and the two ends of the inlet end of the combustor and the outlet end of the combustor protrude out of the inner cavity of the air introduction duct respectively; a fixed block is arranged above the liquid oxygen and oxygen combustor tube, and a bottom is provided under the liquid oxygen and oxygen combustor feet; the liquid oxygen oxygen burner is fixed in the inner cavity of the air duct through the fixing block and the foot;

The liquid oxygen oxygen combustion support device for a biomass particle steam boiler is characterized in that the inlet end of the burner and the outlet end of the burner are made of the same material or one of different materials.

The beneficial effects of the present invention compared with the prior art:

Owing to adopting the above-mentioned technical scheme, the present invention has the following advantages:

1. Safety: Liquid oxygen is a finished product. Liquid oxygen is non-flammable, but it can strongly support combustion, support the combustion of combustibles, release a large amount of heat energy, support combustion to intensify combustion, and not burn itself, just like Iron wire is difficult to burn under normal conditions, and only supports combustion but does not explode in case of an open flame, and the fire hazard is Class B;

2. High efficiency: When the boiler is in operation, when the device is used, the flame of the original fire can be changed from dark red to light white in an instant, and the temperature rises instantly;

3. Energy saving: the raw material pellet fuel can be fully burned, and the energy saving is more than 10% after testing;

4. Environmental protection: the device makes biomass particles fully burned, avoiding the occurrence of black smoke from the chimney and causing environmental pollution;

5. Simple structure and low cost: Dewar flasks can be purchased on the market, and the liquid oxygen in the Dewar flask is a finished product, just like a gas tank can be refilled at any time; At the exit of the tail flue, the waste heat of the boiler itself is used to replace the heating device in the prior art, which saves energy and saves costs; the device can be assembled and used on new and old boilers, so it is convenient for wide popularization and application.

Description of drawings:

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the A-A direction view in Fig. 1;

Fig. 3 is the B-B direction view in Fig. 1;

Fig. 4 is an embodiment structural diagram of the liquid oxygen oxygen burner in Fig. 1;

Fig. 5 is another embodiment structural diagram of the liquid oxygen oxygen burner in Fig. 1;

In the picture:

1. Dewar flask, 2. Liquid inlet and outlet valve, 3. Inlet of burner, 4. Liquid oxygen and oxygen burner, 5. Outlet of burner, 6. Economizer, 7. Boiler draft duct, 8. Boiler Main body, 9. Blower air duct, 10. Blower, 11. Economizer induction air duct, 12. Air intake duct, 15. Air outlet duct, 16. Fixed block, 17. Positioning plate, 18. Foot.

Detailed ways:

In order to further illustrate the above-mentioned objects, technical solutions and effects of the present invention, the present invention will be described below through embodiments in conjunction with the accompanying drawings and relevant known technical knowledge:

As shown in Figures 1-5, the present invention includes a boiler body 8, an economizer 6, a blower 10, a boiler draft duct 7, an economizer draft duct 11, a blower duct 9, a Dewar flask 1 and its matching Liquid inlet and outlet valve 2, inlet delivery pipe 12, and gas outlet delivery pipe 15; a liquid oxygen oxygen burner 4 is provided in one of the inner chambers of the economizer induced air duct 11 or the boiler induced air duct 7; because the boiler induced air duct 7 It is higher than the inner cavity temperature of the economizer induced air duct 11. According to the volume of the liquid oxygen and oxygen burner 4, without affecting the exhaust air, the liquid oxygen and oxygen burner 4 is preferably arranged in the boiler introduction air duct 7. In the cavity, under normal circumstances, the cross section of the inner cavity of the existing boiler draft duct 7 is smaller than that of the economizer draft duct 11. In this embodiment, due to the large volume of the liquid oxygen and oxygen burner 4, the The liquid oxygen and oxygen burner 4 is arranged in the inner cavity of the economizer draft duct 11; the burner inlet end 3 and the burner outlet end 5 of the liquid oxygen oxygen burner 4 respectively extend out of the inner cavity of the draft duct, and the liquid oxygen and oxygen support combustion The inlet end 3 of the combustor 4 is connected to one end of the intake pipe 12 through a connector, and the other end of the intake pipe 12 is connected to the interface end of the inlet and outlet valve 2 on the Dewar flask 1; The combustor outlet end 5 of the burner 4 is connected with one end of the gas outlet pipe 15 through a connector, and the other end of the gas outlet pipe 15 is communicated with the blower air duct 9 through a connector; the connector is a transition joint, and there are sale;

In this embodiment, the other end of the air outlet conveying pipe 15 is provided with a two-end pipe that communicates with the conveying pipe through a three-way pipe, and the two-end pipe ends are respectively connected with the two branch pipes of the blower air duct 9 through the connecting head;

In this embodiment, the air inlet conveying pipe 12 is a stainless steel corrugated pipe; the air outlet conveying pipe 15 is a red copper pipe;

As shown in FIG. 4, it is an embodiment of the liquid oxygen oxygen burner; the liquid oxygen oxygen burner 4 is made of a seamless metal tube and is bent back and forth on the same plane to form a whole, and the burner 4 is made of a seamless metal tube. The two ends of the inlet end 3 and the outlet end 5 of the burner respectively protrude out of the inner cavity of the air induction duct on one side of the whole; a fixing block 16 is provided on the uppermost curved pipe of the liquid oxygen oxygen burner 4, and each curved pipe is provided with a fixing block 16. There is a positioning plate 17 between them, and a foot 18 is arranged under the bent tube at the bottom of the liquid oxygen and oxygen burner 4; The liquid oxygen oxygen burner 4 of the example is made of a stainless steel tube of Φ57%x3. In order to make the inner diameter of the pipe ends of the burner inlet end 3 and the burner outlet end 5 easy to match with one end of the transition joint connected to the burner, the burner The diameter of the pipe end of the inlet end 3 and the outlet end 5 of the burner is smaller than the diameter of the tube body of the liquid oxygen oxygen burner 4; the inlet end 3 of the burner and the outlet end 5 of the burner in this embodiment are made of red copper material;

As shown in Figure 5, it is another embodiment of the liquid oxygen oxygen burner; the liquid oxygen oxygen burner 4 is made of a larger diameter seamless metal tube, but the diameter of this large diameter seamless metal tube is smaller than The height and width of the inner cavity of the air induction duct are arranged so that it does not affect the induction air of the boiler; the larger diameter seamless metal tube in this embodiment is made of stainless steel; the two ends of the seamless metal tube are respectively provided with burners The inlet end 3 and the combustor outlet end 5, and the two ends of the combustor inlet end 3 and the combustor outlet end 5 respectively protrude out of the inner cavity of the air duct; the diameter of the pipe ends of the combustor inlet end 3 and the combustor outlet end 5 It is smaller than the diameter of the tube body of the liquid oxygen and oxygen burner 4, and makes it easy to connect with the connector. The inlet end 3 of the burner and the outlet end 5 of the burner are made of red copper materials; The fixing block 16 is provided with a foot 18 below the liquid oxygen oxygen burner 4; the liquid oxygen oxygen burner 4 is fixed in the inner cavity of the air duct through the fixing block 16 and the foot 18;

The Dewar flask 1 is a super vacuum insulated stainless steel pressure vessel, available on the market, and designed for storage, transportation and use of liquid oxygen, liquid nitrogen, liquid argon or carbon dioxide; these vessels are manufactured according to DOT4L standards, with It is used for reliable and economical transportation and storage of low-temperature liquid gas, as well as on-site storage and supply of low-temperature liquid gas in a wide range of applications; connected to the interface;

The invention is not only suitable for biomass particle steam boilers, but also for organic heat carrier boilers and hot blast stoves;

Working process and working principle:

The liquid oxygen is filled with Dewar flask 1. After the Dewar flask 1 is transported to the site, the inlet and outlet valve 2 on the Dewar flask 1 is connected to the other end of the intake pipe 12; after the boiler works for 10 minutes , when the inner cavity of the air duct is heated, then open the liquid inlet and outlet valve 2 on the Dewar flask 1, and adjust the exhaust flow through the liquid inlet and outlet valve 2. After the liquid oxygen in the Dewar flask 1 is discharged through the liquid inlet and outlet valve 2, the Converted to oxygen, the liquid oxygen and oxygen flow to the liquid oxygen and oxygen burner 4 through the intake pipe 12. Since the liquid oxygen and oxygen burner 4 is arranged in the inner cavity of the air duct, the heat in the inner cavity of the air duct makes the oxygen in the liquid oxygen in the air. The liquid oxygen oxygen burner 4 is heated to form high temperature oxygen, and then flows to the blower air duct 9 through the air outlet pipe 15 to be mixed with air, which strongly supports the combustion of combustibles and makes the combustion effect more significant;

Exemplary embodiments of the present invention have been described above in detail with reference to the accompanying drawings, but those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments, but can be made without departing from the scope or spirit of the present invention. Various modifications are possible, for example, while the various elements of the invention are shown in the above-described embodiments in particular combinations and configurations, other combinations and configurations, including more, less or only a single element, are also contemplated by the invention In the range.

Claims (6)

1. A liquid oxygen and oxygen combustion-supporting device for a biomass particle steam boiler, comprising a boiler body (8), an economizer (6), a blower (10), a boiler draft duct (7), and an economizer draft duct (11) ), the blower air duct (9), the Dewar bottle (1) and its matching liquid inlet and outlet valve (2), air inlet conveying pipe (12), and air outlet conveying pipe (15), which are characterized in that: A liquid oxygen oxygen burner (4) is provided in the inner cavity of the air duct (11) or the boiler induced air duct (7), and the liquid oxygen oxygen burner (4) has an inlet end (3) and an outlet end of the burner. (5) Respectively protrude out of the inner cavity of the air duct, and the inlet end (3) of the liquid oxygen oxygen burner (4) is connected to one end of the intake pipe (12) through a connector, and the intake pipe (12) ) is connected to the interface end of the inlet and outlet valve (2) on the Dewar flask (1); the outlet end (5) of the burner of the liquid oxygen oxygen burner (4) is connected to the gas outlet delivery pipe (15) through the connector One end of the air outlet conveying pipe (15) is connected with the blower air duct (9) through the connecting head. 2. The liquid oxygen and oxygen combustion-supporting device for biomass pellet steam boiler according to claim 1, characterized in that: the other end of the gas outlet conveying pipe (15) is provided with a multi-headed pipe that communicates with the conveying pipe, and the multi-headed pipes are respectively It is communicated with each branch pipe of the blower air duct (9). 3 . The liquid oxygen and oxygen combustion-supporting device for biomass granule steam boiler according to claim 1 , wherein: the air inlet conveying pipe (12) is a stainless steel corrugated pipe; the air outlet conveying pipe (15) is a red copper pipe. 4 . 4. A liquid oxygen and oxygen combustion support device for a biomass pellet steam boiler according to claim 1, characterized in that: the liquid oxygen and oxygen combustion supporter (4) is made of a seamless metal tube and is bent back and forth on the same plane through multiple channels On one side of the whole, a whole is formed, and the two ends of the inlet end (3) of the burner and the outlet end (5) of the burner are respectively protruded out of the inner cavity of the air duct on one side of the whole; A fixed block (16) is provided on the top of a curved pipe, a positioning plate (17) is provided between each curved pipe, and a foot (18) is provided under the bottom curved pipe of the liquid oxygen oxygen burner (4); The liquid oxygen oxygen burner (4) is fixed in the inner cavity of the air induction duct through the fixing block (16) and the foot (18). 5. A liquid oxygen and oxygen combustion support device for a biomass particle steam boiler according to claim 1, characterized in that: the liquid oxygen and oxygen combustion supporter (4) is made of a seamless metal tube, and the two ends of the seamless metal tube are The combustor inlet end (3) and the combustor outlet end (5) are respectively provided, and the two ends of the combustor inlet end (3) and the combustor outlet end (5) are respectively protruded out of the inner cavity of the air duct; A fixing block (16) is arranged on the top of the oxygen-oxygen burner (4), and a foot (18) is arranged below the liquid-oxygen-oxygen burner (4); the liquid-oxygen-oxygen burner (4) passes through the fixing block (16) , The foot (18) is fixed in the inner cavity of the air duct. 6. A biomass particle steam boiler liquid oxygen oxygen combustion device according to claim 4 or 5, characterized in that: the inlet end (3) of the combustor and the outlet end (5) of the combustor are made of the same material or different materials. One made.

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