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CN-224230051-U - Device for changing positive pressure into negative pressure of biomass fuel hot blast stove

CN224230051UCN 224230051 UCN224230051 UCN 224230051UCN-224230051-U

Abstract

The utility model discloses a device for changing positive pressure into negative pressure of a biomass fuel hot blast stove. The flue-cured tobacco flue-curing furnace is technically characterized by comprising a furnace body, a chimney, a hopper, an exhaust fan and a supplementing fan, wherein the combustion chamber is arranged in the furnace body and is used for burning fuel, the chimney is fixedly connected with the furnace body and is communicated with the combustion chamber and is used for allowing combustion gas to leave the combustion chamber, the hopper is used for stacking fuel and is connected with the furnace body through a pipeline, the exhaust fan is arranged on the chimney and is used for guiding the combustion gas to leave the combustion chamber and the chimney in an accelerating way, the supplementing fan is also arranged on the furnace body and is used for supplementing air to the combustion chamber, and the air supplementing quantity of the supplementing fan is smaller than the air exhausting quantity of the exhaust fan so as to generate negative pressure in the combustion chamber and the chimney.

Inventors

  • MENG LIN
  • LI YANG
  • HUANG ZHONGHUA

Assignees

  • 中国农业科学院烟草研究所(中国烟草总公司青州烟草研究所)
  • 浙江华敏智能装备有限公司

Dates

Publication Date
20260512
Application Date
20250605

Claims (7)

  1. 1. A device for changing positive pressure into negative pressure of a biomass fuel hot blast stove comprises: The furnace comprises a furnace body (1), wherein a combustion chamber (2) is arranged in the furnace body (1), and the combustion chamber (2) is used for combusting fuel; The chimney (3) is fixedly connected with the furnace body (1), and the chimney (3) is communicated with the combustion chamber (2) and is used for allowing combustion gas to leave the combustion chamber (2); The hopper (4) is used for stacking fuel, and the hopper (4) is connected with the furnace body (1) through a feed channel; The combustion chamber air supply device is characterized by comprising an exhaust fan (5), wherein the exhaust fan (5) is arranged on a chimney (3), combustion gas is guided by the exhaust fan (5) to be accelerated to leave the combustion chamber (2) and the chimney (3), the combustion chamber air supply device further comprises a supplementary fan (6), the supplementary fan (6) is arranged on the furnace body (1) and is used for carrying out supplementary air on the combustion chamber (2), and the supplementary air quantity of the supplementary fan (6) is smaller than the exhaust air quantity of the exhaust fan (5) so that negative pressure is generated in the combustion chamber (2) and the chimney (3).
  2. 2. The device for changing the positive pressure into the negative pressure of the biomass fuel hot blast stove according to claim 1, wherein the power of the exhaust fan (5) is adjustable, and the power of the supplementing fan (6) is adjustable.
  3. 3. The device for changing positive pressure into negative pressure of biomass fuel hot blast stove according to claim 1 or 2, wherein the exhaust fan (5) is arranged at the top of the chimney (3).
  4. 4. The device for changing positive pressure into negative pressure of biomass fuel hot blast stove according to claim 1 or 2, wherein the supplementing fan (6) is arranged at one side close to the hopper (4).
  5. 5. The device for changing the positive pressure into the negative pressure of the biomass fuel hot blast stove according to claim 1 or 2, wherein the airflow blown out by the supplementing fan (6) moves towards the chimney (3).
  6. 6. The positive pressure-to-negative pressure device of the biomass fuel hot blast stove according to claim 1 or 2, further comprising a control board, wherein the control board is connected with the exhaust fan (5) and the supplementary fan (6) and is used for controlling the power difference between the exhaust fan (5) and the supplementary fan (6) so as to control the exhaust air quantity and the supplementary air quantity difference.
  7. 7. The positive pressure-to-negative pressure device of the biomass fuel hot blast stove according to claim 1 or 2, wherein the exhaust fan (5) comprises an exhaust motor (51) and an exhaust blade (52), the exhaust blade (52) is connected with the exhaust motor (51), the exhaust blade (52) is positioned in the chimney (3), and an exhaust heat radiation cover (53) is arranged between the exhaust blade (52) and the exhaust motor (51).

Description

Device for changing positive pressure into negative pressure of biomass fuel hot blast stove Technical Field The utility model relates to the field of tobacco leaf baking equipment, in particular to a device for changing positive pressure into negative pressure of a biomass fuel hot blast stove. Background The existing biomass fuel combustion furnace has the characteristics of high efficiency and energy conservation, and can reduce the pollution to the environment, so that the biomass fuel combustion furnace is widely used. When the tobacco leaf baking heat supply device is used as a heat supply device for baking tobacco leaves, in order to ensure the quality of the tobacco leaves, high-temperature smoke generated by the isolated combustion of the pipeline is used for heat exchange between circulating airflow of a tobacco leaf baking room and the pipeline, so that heat is taken away for baking the tobacco leaves. However, in the long-term use process of the furnace body, the situation of cracks and corrosion can be avoided, so that the furnace body is not complete any more, at the moment, the combustion chamber in the furnace body is communicated with the tobacco curing barn through the cracks, the combustion chamber is in a positive pressure state relative to the tobacco curing barn, biomass in combustion in the combustion chamber can leave the combustion chamber through the cracks under the action of air pressure, then enters the tobacco curing barn along with circulating air flow, tobacco in the tobacco curing barn is extremely easy to burn after curing, is difficult to remedy after being ignited, the tobacco can be completely burnt, the tobacco curing barn can be damaged, and economic loss is caused to a user. The current remedial measure is to repair the burning furnace regularly, which is time-consuming and labor-consuming, and can not repair the new crack generated by the furnace body in the flue-cured tobacco process, and has potential safety hazard all the time. Disclosure of utility model Aiming at the defects existing in the prior art, the utility model aims to provide a device for changing positive pressure into negative pressure of a biomass fuel hot blast stove so as to solve the technical problems. In order to achieve the purpose, the utility model provides the following technical scheme that the device for changing the positive pressure into the negative pressure of the biomass fuel hot blast stove comprises: The furnace body is internally provided with a combustion chamber which is used for burning fuel; The chimney is fixedly connected with the furnace body, communicated with the combustion chamber and used for allowing combustion gas to leave the combustion chamber; the hopper is used for stacking fuel and is connected with the furnace body through a feed channel; The combustion chamber and the chimney are connected through a fan, the fan is arranged on the chimney, combustion gas is guided to be accelerated to leave the combustion chamber and the chimney, the combustion chamber and the chimney are further connected through a fan, the fan is arranged on the furnace body and used for supplementing air to the combustion chamber, and the air supplementing quantity of the fan is smaller than the air exhausting quantity of the fan, so that negative pressure is generated in the combustion chamber and the chimney. As a further improvement of the utility model, the power of the exhaust fan is adjustable, and the power of the supplementary fan is adjustable. As a further development of the utility model, the exhaust fan is arranged at the top of the chimney. As a further improvement of the utility model, the supplementing fan is arranged near one side of the hopper. As a further improvement of the utility model, the air flow blown by the compensating fan moves towards the chimney. The utility model further comprises a control board which is connected with the exhaust fan and the supplementary fan and used for controlling the power difference of the exhaust fan and the supplementary fan so as to control the exhaust air quantity and the supplementary air quantity difference. As a further improvement of the utility model, the exhaust fan comprises an exhaust motor and an exhaust fan blade, wherein the exhaust fan blade is connected with the exhaust motor, the exhaust fan blade is positioned in the chimney, and an exhaust heat radiation cover is arranged between the exhaust fan blade and the exhaust motor. The utility model has the beneficial effects that the positive pressure state in the combustion chamber of the biomass fuel hot blast stove is changed into the negative pressure state, so that the tobacco leaves are prevented from firing in the flue-cured tobacco process, the potential safety hazard is eliminated, and the economic loss is avoided. Drawings FIG. 1 is a schematic diagram of a biomass fuel hot blast stove and a tobacco curing barn. The mark instruction comprises 1, a furnace body, 2, a