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CN-121993783-A - Air inlet control device and method for electricity-saving fluidized bed furnace

CN121993783ACN 121993783 ACN121993783 ACN 121993783ACN-121993783-A

Abstract

The invention discloses an air inlet control device and method of an electricity-saving type fluidized bed furnace, comprising a furnace body, an air box, a fan, an air guide pipe, an air storage tank and a first control valve, wherein an air cap for air inlet is arranged at the bottom of the inner side of the furnace body, the air box is fixed at the lower end of the furnace body to be communicated with the inside of the air cap, the fan is arranged at one side of the furnace body, an air outlet of the fan is connected with a communicating pipe connected with the air box, the air guide pipe is arranged on the lower surface of the communicating pipe, and the air storage tank is connected with one end of the air guide pipe.

Inventors

  • WANG BING
  • YUAN WEIYA
  • YUAN JINKAI

Assignees

  • 泰山石膏(涡阳)有限公司

Dates

Publication Date
20260508
Application Date
20260119

Claims (10)

  1. 1. An air inlet control device of a power-saving fluidized bed furnace is characterized by comprising: the furnace comprises a furnace body (1), wherein a hood (10) for air intake is arranged at the bottom of the inner side of the furnace body (1); the air box (2) is fixed at the lower end of the furnace body (1) to be communicated with the inside of the hood (10); the fan (4) is arranged at one side of the furnace body (1), and an air outlet of the fan (4) is connected with a communicating pipe (6) connected with the air box (2); the air guide pipe (7) is arranged on the lower surface of the communicating pipe (6); The air storage tank (3) is connected to one end of the air guide pipe (7), a first air outlet pipe (9) communicated with the air box (2) is arranged at one end of the air storage tank (3), and a first control valve (91) is arranged on the first air outlet pipe (9); The sensor (5) is connected to one side of the first control valve (91) through a wire, the sensor (5) is matched with a fuel inlet of the furnace body (1), and when the added fuel is detected, a signal is transmitted to adjust the opening degree of the first control valve (91).
  2. 2. The air inlet control device of the electricity-saving type fluidized bed furnace according to claim 1, wherein the air guide pipe (7) is of an inclined structure, and a one-way valve (71) is sleeved outside the air guide pipe (7).
  3. 3. The air inlet control device of the power-saving type fluidized bed furnace of claim 1, wherein the sensor (5) is a proximity sensor, the first control valve (91) is provided with a controller, and the controller is electrically connected with the sensor (5).
  4. 4. The air inlet control device of the power-saving type fluidized bed furnace is characterized in that an air inlet of the fan (4) is connected with a first air inlet pipe (11), a three-way valve (12) is arranged at the top end of the first air inlet pipe (11), an interface of the three-way valve (12) is connected with an air inlet assembly, the air inlet assembly is communicated with a slag discharge pipe (14) arranged on one side wall of the furnace body (1) to recycle sand grains and waste heat, and the other interface of the three-way valve (12) is connected with a second air inlet pipe.
  5. 5. The air inlet control device for the electricity-saving type fluidized bed furnace is characterized in that the air inlet assembly comprises an elbow (131), an air suction pipe (134), a filter cover (135) and a second filter screen (139), the elbow (131) is fixed on the three-way valve (12), the lower end of the elbow (131) is connected with a filter cartridge (133), the filter cover (135) is fixed on the inner side of the filter cartridge (133) to correspond to the end part of the elbow (131), the lower end of the filter cartridge (133) is provided with a connecting port (136), the air suction pipe (134) with two ends communicated with the two ends of the filter cartridge (133) and the slag discharge pipe (14) is arranged between the filter cartridge and the slag discharge pipe (14), and the inner wall of the slag discharge pipe (14) is provided with the second filter screen (139) corresponding to the end part of the air suction pipe (134).
  6. 6. The air inlet control device for the electricity-saving type fluidized bed furnace of claim 5, wherein the air inlet assembly further comprises a first filter screen (132), a first feeding pipe (137) and a second control valve (138), the first feeding pipe (137) is connected to the inner side of the connecting port (136), one end of the first feeding pipe (137) is communicated with the inside of the air box (2), the second control valve (138) is arranged on one side of the first feeding pipe (137), and the first filter screen (132) is fixed to the upper end of the inner side of the air box (2) to correspond to one end of the first feeding pipe (137).
  7. 7. The air inlet control device of the power-saving type fluidized bed furnace of claim 6, wherein the edge of the first filter screen (132) is higher than one end of the communicating pipe (6) and one end of the first air outlet pipe (9).
  8. 8. The air inlet control device of the power-saving type fluidized bed furnace is characterized in that the air inlet assembly further comprises a second feeding pipe (140), a third control valve (141) and a second air outlet pipe (142), the second feeding pipe (140) is connected to the inner side of the connecting port (136), one end of the second feeding pipe (140) is communicated with the inside of the furnace body (1), the third control valve (141) is installed on the second feeding pipe (140), the second air outlet pipe (142) is fixed to the lower end of one side wall of the bent pipe (131), one end of the second air outlet pipe (142) is communicated with the inside of the air storage tank (3), and a second electromagnetic valve is arranged on the second air outlet pipe (142).
  9. 9. An air inlet control method of a power-saving type fluidized bed furnace, which adopts the control device of any one of claims 1 to 8, and is characterized by further comprising the following steps: The method comprises the steps that A, a fan (4) blows air into the inner side of a fan box (2) through a communicating pipe (6), the air enters the inner side of a furnace body (1) through a hood (10) to support combustion and suspend fuel, and meanwhile, a part of air enters the inner side of a gas storage tank (3) through a wind guide pipe (7) to be stored; When fuel is injected into the furnace body (1) through the fuel port, the sensor (5) detects the fuel, then a signal is transmitted to the first control valve (91), the opening degree of the first control valve (91) is adjusted to be increased, so that air flows into the inner side of the air box (2) through the first air outlet pipe (9), the air flowing into the inner side of the furnace body (1) is improved, and after the sensor (5) detects that the fuel is not injected for a period of time, the communication between the first air outlet pipe (9) and the air box (2) is disconnected through the first control valve (91); When the furnace body (1) is deslagged to the outside through a deslagging pipe (14), a three-way valve (12) is used for controlling an elbow pipe (131) to be communicated with a first air inlet pipe (11), suction is generated at the inner side of a filter cylinder (133), sand grains at the inner side of the deslagging pipe (14) are sucked into the inner side of the filter cylinder (133) through an air suction pipe (134), coal gangue falls down along the deslagging pipe (14) by means of self gravity to be discharged, a filter cover (135) isolates the sand grains at the inner side of the filter cylinder (133), and the heat of the sand grains is led into the inner side of a communicating pipe (6) through the elbow pipe (131), the first air inlet pipe (11) and a fan (4) and then enters a bellows (2); And D, when the three-way valve (12) controls the second air inlet pipe to be communicated with the first air inlet pipe (11), the second control valve (138) enables the first feeding pipe (137) to be communicated with the inside of the air box (2), so that sand grains flow into the inside of the air box (2) along the inclined first feeding pipe (137) under the action of gravity, and air flowing into the inside of the air box (2) through the communicating pipe (6) is blown to be fed into the inside of the furnace body (1) again for supplementation.
  10. 10. The method for controlling air intake of a power saving type fluidized bed furnace according to claim 9, wherein in the step D, when the three-way valve (12) controls the second air inlet pipe to be communicated with the first air inlet pipe (11), the third control valve (141) enables the second feeding pipe (140) to be communicated with the inside of the furnace body (1), meanwhile, the second electromagnetic valve controls the second air outlet pipe (142) to be communicated with the inside of the air storage tank (3), high-pressure air inside the air storage tank (3) is blown into the filter cylinder (133) and the inside of the second feeding pipe (140) through the bent pipe (131), and sand grains are fed into the inside of the furnace body (1) again for supplementation.

Description

Air inlet control device and method for electricity-saving fluidized bed furnace Technical Field The invention particularly relates to an air inlet control device and method for an electricity-saving fluidized bed furnace. Background The fluidized bed furnace is used as a high-efficiency combustion device and is widely applied to the industries of chemical industry, metallurgy, energy sources and the like. The operating principle is that high-speed air flow is fed into the furnace through the bottom hood, under the combustion supporting of the combustion-supporting fan, coal particles are added at a constant speed, the red sand particles burnt in the furnace ignite the added coal particles, so that the coal particles and the sand particles are boiled together, thereby realizing full combustion and efficient heat transfer, the air inlet control of the traditional fluidized bed furnace is mainly based on the direct adjustment of the air inlet quantity of the fan, and when the fuel input quantity is changed, the air inlet quantity is changed by adjusting the rotating speed of the fan, so as to meet the oxygen demand of different combustion stages. However, the existing method for adjusting the rotating speed of the fan has obvious defects that on one hand, the fan is frequently started and stopped or operates at a variable speed to cause the increase of electric energy consumption, on the other hand, the air supply response is delayed, the instant oxygen deficiency is easily caused to influence the combustion due to the fact that the air supply response is difficult to match with the fuel input change, or the energy consumption is high due to excessive air supply, in addition, waste residues generated in the operation of the fluidized bed furnace, such as coal gangue, are usually directly discharged through a slag discharging pipe, sand grains and high-temperature waste heat carried by the waste residues are not effectively recycled, and therefore the air inlet control device and the air inlet control method of the power-saving fluidized bed furnace are provided. Disclosure of Invention The invention aims to provide an air inlet control device and an air inlet control method for an electricity-saving type fluidized bed furnace, which are used for solving the problems in the background technology. In order to achieve the purpose, the invention provides the following technical scheme that the air inlet control device of the electricity-saving type fluidized bed furnace comprises: the bottom of the inner side of the furnace body is provided with a hood for air intake; The air box is fixed at the lower end of the furnace body and is communicated with the inside of the hood; the fan is arranged at one side of the furnace body, and an air outlet of the fan is connected with a communicating pipe connected with the air box; The air guide pipe is arranged on the lower surface of the communicating pipe; the air storage tank is connected to one end of the air guide pipe, one end of the air storage tank is provided with a first air outlet pipe communicated with the air box, and the first air outlet pipe is provided with a first control valve; The sensor is connected to one side of the first control valve through a wire, is matched with a fuel inlet of the furnace body, and transmits a signal to adjust the opening of the first control valve when the added fuel is detected. Preferably, the air guide pipe is of an inclined structure, and a one-way valve is sleeved on the outer side of the air guide pipe. Preferably, the sensor is a proximity sensor, the first control valve is provided with a controller, and the controller is electrically connected with the sensor. Preferably, the fan air inlet is connected with a first air inlet pipe, a three-way valve is arranged at the top end of the first air inlet pipe, an interface of the three-way valve is connected with an air inlet assembly, the air inlet assembly is communicated with a slag discharging pipe arranged on one side wall of the furnace body to recycle sand grains and waste heat, and the other interface of the three-way valve is connected with a second air inlet pipe. Preferably, the air inlet assembly comprises an elbow, an air suction pipe, a filter cover and a second filter screen, wherein the elbow is fixed on the three-way valve, the lower end of the elbow is connected with a filter cartridge, the filter cover is fixed on the inner side of the filter cartridge to correspond to the end part of the elbow, the lower end of the filter cartridge is provided with a connecting port, the air suction pipe with two ends communicated with the two ends is arranged between the filter cartridge and a slag discharge pipe, and the inner wall of the slag discharge pipe is correspondingly provided with the second filter screen with the end part of the air suction pipe. Preferably, the air inlet assembly further comprises a first filter screen, a first feeding pipe and a second control