CN115234899A - A heat carrier heating furnace for burning biomass to make gas - Google Patents

Abstract

The invention discloses a heat carrier heating furnace for burning biomass to produce gas, in particular to the field of industrial boilers, comprising a furnace body and a combustion chamber, the combustion chamber is arranged below the furnace body, and a combustion chamber is arranged on one side of the combustion chamber A radiant section coil is installed at the bottom end of the side of the furnace body away from the burner, the upper end of the radiant section coil is connected with a ceiling tube, and the interior of the furnace body is located between the radiant section coil and the ceiling tube. A convection section is arranged on one side, an inlet header is arranged at the outer end of the furnace body, one end of the inlet header is arranged inside the furnace body and is connected with a convection section header, and the upper end of the furnace body is arranged with an outlet header and smoke outlet. The invention adapts to various biomass gas-making fuels and ensures stable combustion. The adiabatic combustion chamber is adopted, and the temperature of the combustion chamber is always kept between 1000 and 1100 °C for all kinds of gases with low calorific value, high water content and high tar content, with high burnout rate and low nitrogen oxide production.

Description

A heat carrier heating furnace for burning biomass to make gas

technical field

The present invention relates to the technical field of industrial boilers, and more particularly, to a heat carrier heating furnace for burning biomass to produce gas.

Background technique

At present, with the continuous advancement of the national goal of carbon peaking and carbon neutrality, biomass fuels have been vigorously developed; however, the diversity and instability of biomass fuel sources have led to the output and pollutants of direct-fired biomass fuel heating furnaces. Emissions cannot be guaranteed to be stable, and biomass-to-gas heating furnaces are used as fuel.

Compared with natural gas, liquefied petroleum gas and coke oven gas, biomass gas has relatively stable components, continuous supply and convenient adjustment. However, it has the characteristics of low calorific value, high water content and high tar content. At the same time, the quality of the gas source produced by various gas manufacturers is also quite different, and the heat carrier heating furnace burning biomass gas needs to be designed in a targeted manner.

Application content

In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a heat carrier heating furnace for burning biomass for gas production. The technical problem to be solved by the present invention is: how to better utilize biomass for gas production, improve biomass production Gas utilization efficiency.

In order to achieve the above purpose, the present invention provides the following technical solutions: a heat carrier heating furnace for burning biomass to produce gas, comprising a furnace body and a combustion chamber, the combustion chamber is arranged below the furnace body, and one side of the combustion chamber is arranged There is a burner, and the bottom end of the side of the furnace body away from the burner is installed with a radiant section coil, the upper end of the radiant section coil is connected with a ceiling tube, and the interior of the furnace body is located between the radiant section coil and the ceiling. One side of the tube is provided with a convection section, the outer end of the furnace body is provided with an inlet header, one end of the inlet header is provided inside the furnace body and is connected with a convection section header, and the upper end of the furnace body is provided with an outlet Header and smoke outlet.

In a preferred embodiment, a burner interface is provided on the side wall of the combustion chamber, the burner is installed at the burner interface, the burner is a high-temperature low-nitrogen gas burner, and the combustion A multi-stage gas emergency cut-off device and a relief device are arranged on the burner, and the burner can ignite the biomass gas inside the combustion chamber. The multi-stage gas emergency shut-off device and the relief device can effectively improve the safety of the bio-furnace.

In a preferred embodiment, the combustion chamber adopts negative pressure combustion. After the biomass gasification device produces gas, it is directly sent to the combustion chamber for combustion without intermediate storage tanks and pressurization. Combustion, no other process is required in the middle, the process is simple, and the cost is low.

In a preferred embodiment, the surrounding and lower parts of the combustion chamber are adiabatic furnace walls, and the upper part of the combustion chamber is provided with a furnace arch and a throat. With high content of gas, the temperature of the combustion chamber is always maintained between 1000-1100 ° C, the burnout rate is high, and the amount of nitrogen oxides produced is small.

In a preferred embodiment, the convection section includes a first convection section, a second convection section, a third convection section and a fourth convection section, and one end of the first convection section is connected to one end of the radiating section coil, One end of the fourth convection section is connected to the convection section header, and multiple convection sections can better realize the heat exchange between the heat carrier and the internal heat of the biological furnace.

In a preferred embodiment, the first convective section, the second convective section, the third convective section and the fourth convective section adopt a multi-stage parallel or series structure, and the convection sections of each stage are spaced along the flue gas flow direction. It gradually decreases, and the convection section can be selectively set in series or parallel structure according to the actual situation inside the furnace body.

In a preferred embodiment, one end of the ceiling tube away from the radiant section coil is connected to the outlet header, and the heat carrier can enter the outlet header through the ceiling tube, and then be discharged through the outlet header for heat release of the thermal equipment .

Compared with the prior art, the technical effects and advantages of the present invention:

1. The present invention is suitable for all kinds of biomass gas-making fuels to ensure stable combustion. Adopting adiabatic combustion chamber, for all kinds of gases with low calorific value, high water content and high tar content, the temperature of the combustion chamber is always kept between 1000 and 1100 °C, the burnout rate is high, and the amount of nitrogen oxides produced is small;

2. The invention is safe and reliable, the burner is equipped with a multi-stage gas emergency cut-off and discharge device, the combustion chamber is a six-sided heavy furnace wall with explosion-proof doors, the heating furnace gas combustion is safe and reliable, and the accident loss is small;

3. The invention has high thermal efficiency, low calorific value of biomass gas production, less radiation heat exchange and more convection heat exchange, and adopts the structure of radiation section + multi-stage convection section to ensure that the temperature of the exhaust gas is less than or equal to the inlet temperature of the heat carrier + 20°C.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention.

Reference signs are: 1. Furnace body; 2. Combustion chamber; 3. Burner; 4. Radiant section coil; 5. Ceiling tube; 6. Inlet header; 7. Convection section header; 8. Outlet header ; 9, the first convection section; 10, the second convection section; 11, the third convection section; 12, the fourth convection section.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

A heat carrier heating furnace for burning biomass to produce gas shown in FIG. 1 includes a furnace body 1 and a combustion chamber 2, the combustion chamber 2 is arranged below the furnace body 1, and one side of the combustion chamber 2 is provided with Burner 3, the bottom end of the furnace body 1 away from the burner 3 is installed with a radiant section coil 4, the upper end of the radiant section coil 4 is connected with a ceiling tube 5, and the interior of the furnace body 1 is located at A convection section is arranged on one side of the radiant section coil 4 and the ceiling tube 5, an inlet header 6 is arranged at the outer end of the furnace body 1, and one end of the inlet header 6 is arranged inside the furnace body 1 and is connected with a convection section. The header 7, the upper end of the furnace body 1 is provided with an outlet header 8 and a smoke outlet 13.

In a preferred embodiment, a burner interface is provided on the side wall of the combustion chamber 2, the burner 3 is installed at the burner interface, and the burner 3 is a high-temperature low-nitrogen gas burner, and The burner 3 is provided with a multi-stage gas emergency cut-off device and a discharge device, the burner 3 can ignite the biomass gas production in the combustion chamber 2, and the multi-stage gas emergency cut-off device and the discharge device can effectively improve the biological furnace. security.

In a preferred embodiment, the combustion chamber 2 adopts negative pressure combustion, and after the biomass gasification device produces gas, it is directly sent to the combustion chamber 2 for combustion without intermediate storage tanks and pressurization, and the biomass gas production is directly used for biological The combustion of the furnace does not require other processes in the middle, the process is simple, and the cost is low.

In a preferred embodiment, the surrounding and lower parts of the combustion chamber 3 are thermally insulated furnace walls, the upper part of the combustion chamber 3 is provided with a furnace arch and a throat, and in actual use, the combustion chamber 2 is also provided with an explosion-proof door, a fire watch Holes, manholes, inspection holes, etc., to improve the safety performance of the equipment.

In a preferred embodiment, the convection section includes a first convection section 9, a second convection section 10, a third convection section 11 and a fourth convection section 12, and one end of the first convection section 9 radiates a section disc One end of the tube 4 is connected, and one end of the fourth convection section 12 is connected to the convection section header 7, and multiple convection sections can better realize the heat exchange between the heat carrier and the internal heat of the biological furnace.

In a preferred embodiment, the first convection section 9, the second convection section 10, the third convection section 11 and the fourth convection section 12 adopt a multi-stage parallel or series structure, and the convection sections of each level flow with the flue gas The directional segment spacing gradually decreases.

In a preferred embodiment, the end of the ceiling pipe 5 away from the radiant section coil 4 is connected to the outlet header 8 , and the heat carrier can enter the outlet header 8 through the ceiling pipe 5 and then be discharged through the outlet header 8 Used for heat release in thermal equipment.

The specific embodiment is as follows: when in use, the biomass-made gas produced by the biomass furnace is introduced into the combustion chamber 2 through negative pressure, the biomass-made gas is ignited by the burner 3, and the hot smoke generated by the combustion of the biomass-made gas is folded at the front. To the outside of the radiant section coil 2 and the ceiling tube 3, and then enter the first convection section 9, the second convection section 10, the third convection section 11 and the fourth convection section 12 in turn, and finally exhaust through the smoke outlet 13, while the heat The carrier is introduced through the inlet header 6, and then enters the convection section header 7, so that the heat carrier passes through the fourth convection section 12, the third convection section 11, the second convection section 10 and the first convection section 9 in turn. Heat exchange is carried out with the heat generated by combustion in the furnace body 1 in the multiple convection sections. The heat carrier in the first convection section 9 enters the radiant section coil 2 to continue heat exchange, and the heat carrier in the radiant section coil 2 enters into the ceiling pipe 3, and the heat carrier in the ceiling pipe 3 enters into the outlet header 8, and then is discharged for heating of the thermal equipment.

The invention adapts to various biomass gas-making fuels and ensures stable combustion. Adopting adiabatic combustion chamber, for all kinds of gases with low calorific value, high water content and high tar content, the temperature of the combustion chamber is always kept between 1000 and 1100°C, the burnout rate is high, and the amount of nitrogen oxides produced is small; the invention is safe Reliable, the burner is equipped with a multi-stage gas emergency cut-off and discharge device, the combustion chamber is a six-sided heavy furnace wall with explosion-proof doors, the heating furnace gas combustion is safe and reliable, and the accident loss is small; the invention has high thermal efficiency, and biomass gas production Low calorific value, less radiative heat transfer and more convection heat transfer, the structure of radiation section + multi-stage convection section is adopted to ensure that the smoke temperature is less than or equal to the inlet temperature of the heat carrier + 20°C.

The last points that should be noted are: First, in the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, and may be mechanical connection. or electrical connection, or internal communication between two components, or direct connection, "up", "down", "left", "right", etc. are only used to indicate relative positional relationship, when the absolute position of the object being described changes, the relative positional relationship may change;

Secondly: in the drawings of the disclosed embodiments of the present invention, only the structures involved in the embodiments of the present disclosure are involved, other structures may refer to the general design, and the same embodiment and different embodiments of the present invention can be combined with each other under the condition of no conflict;

Finally: the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the present invention. within the scope of protection.

Claims (7)

1. The utility model provides a fire heat carrier heating furnace that living beings gas, includes furnace body (1) and combustion chamber (2), combustion chamber (2) set up in furnace body (1) below, its characterized in that: one side of combustion chamber (2) is provided with combustor (3), furnace body (1) inside one side bottom of keeping away from combustor (3) is installed and is radiated section coil pipe (4), the upper end of radiating section coil pipe (4) is connected with ceiling pipe (5), one side that the inside of furnace body (1) is located radiation section coil pipe (4) and ceiling pipe (5) is provided with the convection section, the outer end of furnace body (1) is provided with import header (6), the one end of import header (6) sets up in furnace body (1) internal connection has convection section header (7), the upper end of furnace body (1) is provided with export header (8) and outlet flue (13).

2. The heat carrier heating furnace for biomass-fired gas production according to claim 1, characterized in that: the combustor interface is arranged on the side wall of the combustion chamber (2), the combustor (3) is installed at the combustor interface, the combustor (3) is a high-temperature low-nitrogen gas combustor, and a multi-stage gas emergency cut-off device and a discharge device are arranged on the combustor (3).

3. The heat carrier heating furnace for biomass-fired gas production according to claim 1, characterized in that: the combustion chamber (2) adopts negative pressure combustion, and the biomass gasification device directly sends the gas to the combustion chamber (2) for combustion after gas making, without an intermediate storage tank and pressurization.

4. The heat carrier heating furnace for biomass-fired gas production according to claim 1, characterized in that: the periphery and the lower part of the combustion chamber (3) are all heat insulation furnace walls, and the upper part of the combustion chamber (3) is provided with a furnace arch and a throat.

5. The heat carrier heating furnace for biomass-fired gas production according to claim 1, characterized in that: the convection section comprises a first convection section (9), a second convection section (10), a third convection section (11) and a fourth convection section (12), one end of the radiant section coil pipe (4) at one end of the first convection section (9) is connected, and one end of the fourth convection section (12) is connected with the convection section header pipe (7).

6. The heat carrier heating furnace for biomass-fired gas production according to claim 5, characterized in that: the first convection section (9), the second convection section (10), the third convection section (11) and the fourth convection section (12) adopt a multi-stage parallel or series structure, and the space between the pipe pieces of each stage of convection section is gradually reduced along with the flowing direction of flue gas.

7. The heat carrier heating furnace for biomass-fired gas production according to claim 5, characterized in that: one end of the ceiling pipe (5) far away from the radiant section coil pipe (4) is connected with an outlet header pipe (8).

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