CN108413410A - Waste incineration flue gas waste heat recovery device - Google Patents

Abstract

The invention relates to the technical field of heat energy recovery, in particular to a waste incineration flue gas waste heat recovery device which comprises an incinerator, a heat exchange box and a shell, wherein a bent heat exchange tube is arranged in the heat exchange box, the left end of the heat exchange tube is fixedly connected with a second connecting tube, the right end of the heat exchange tube is fixedly connected with a first connecting tube, the top end of the second connecting tube is fixedly connected with a water inlet tube, the right end of the second connecting tube is communicated with the shell, a first water temperature detector and a second water temperature detector are respectively and fixedly arranged on the first connecting tube and the second connecting tube, the top end of the heat exchange box is fixedly connected with a controller, the controller is respectively and electrically connected with the first water temperature detector and the second water temperature detector, the bottom end of the heat exchange box is fixedly connected with a support, an induced draft fan is fixedly connected in, convenient adjustment, great economic benefit and wide market demand, and is worth popularizing.

Description

Waste heat recovery device for waste incineration flue gas

technical field

The invention relates to the technical field of heat energy recovery, in particular to a waste heat recovery device for waste incineration flue gas.

Background technique

Waste incineration power generation is the work of introducing, digesting, absorbing and reinnovating waste incineration plants and waste incineration equipment. More than 60% of my country's electricity comes from coal-fired power plants, and a large amount of SO2 will be generated in the production process. In the field of flue gas desulfurization, limestone-gypsum wet desulfurization technology has many advantages and is widely used in coal-fired power plants. 60% to 70% of the loss, the exhaust gas temperature is the main factor affecting the loss of flue gas waste heat resources, therefore, the demand for waste incineration flue gas waste heat recovery devices is increasing day by day.

The current waste incinerators can generate thermal power when incinerating waste, but the flue gas after incineration is directly discharged into the air after a series of treatments such as desulfurization. Since these high-temperature flue gases contain a large amount of heat energy, direct emission wastes resources. The income of the incinerator is reduced. Moreover, the heat exchange equipment in the existing flue gas heat recovery system cannot achieve the expected effect to some extent. Its stability and accuracy are poor, resulting in uneven heat recovery and poor user experience. , therefore, a garbage incineration flue gas waste heat recovery device is proposed to solve the above problems.

Contents of the invention

The object of the present invention is to provide a waste heat recovery device for waste incineration flue gas, so as to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A device for recovering waste heat from waste incineration flue gas, comprising an incinerator, a heat exchange box and a casing, a feed inlet is provided under the front of the incinerator, an air guide pipe is fixedly connected to the top of the incinerator, and the other end of the air guide pipe It is fixedly connected with the heat exchange box, and the heat exchange box is provided with a curved heat exchange tube, the left end of the heat exchange tube is fixedly connected with the second connecting tube, and the right end of the heat exchange tube is fixedly connected with the first connecting tube, so The top of the second connecting pipe is fixedly connected with a water inlet pipe, and an electric valve is installed on the water inlet pipe, the right end of the second connecting pipe communicates with the housing, and the first connecting pipe and the second connecting pipe are respectively fixedly installed with a first A water temperature detector and a second water temperature detector, the top of the heat exchange box is fixedly connected with a controller, the controller is electrically connected with the first water temperature detector and the second water temperature detector respectively, and the bottom of the heat exchange box is fixed Connected with a bracket, the bracket is fixedly connected with an induced draft fan, the input end of the induced draft fan is fixedly connected with a smoking pipe, the output end of the induced draft fan is fixedly connected with a smoke exhaust pipe, the other end of the smoking tube is connected to the heat exchange The side wall of the box is fixedly connected, the rear bottom of the housing is fixedly connected with a motor, the motor shaft extends into the housing and is fixedly connected with a rotating disk, the edge of the rotating disk is fixedly connected with a connecting rod for rotation, and the top of the connecting rod A slider is hinged, and the slider is slidably connected to the inner wall of the housing. The top of the slider is fixedly connected with a push rod, and the top of the housing is provided with a water inlet, and the top of the water inlet is fixedly connected with an arc cover. A ball is arranged inside the arc-shaped cover, and the top end of the arc-shaped cover communicates with the first connecting pipe.

Preferably, the diameter of the sphere is 2-3 cm wider than the water inlet.

Preferably, a water outlet is opened on the right side wall of the housing, and a drain pipe is fixedly connected to the right end of the water outlet.

Preferably, the bottom end of the incinerator is fixedly connected with supporting legs.

Preferably, the controller is electrically connected with the motor.

Compared with prior art, the beneficial effect of the present invention is:

1. In the present invention, the waste heat in the high-temperature flue gas produced by garbage incineration can be recovered through the air guide pipe, heat exchange box, heat exchange pipe and induced draft fan, and the heat exchange of gas and water can be realized through the heat exchange box, and the recovery Flue gas waste heat heating domestic water or boiler water replenishment, safe and reliable, easy to install, long service life, good energy-saving benefits, short investment recovery period, worthy of promotion;

2. In the present invention, the quantitative drainage operation can be realized through the set shell, motor, turntable, connecting rod and piston, and the hot water can be discharged quantitatively through the motor to drive the piston to slide up and down, and cooperate with the controller to make the heat exchange of flue gas more effective. , so that the device has been greatly improved in operation and accuracy.

Description of drawings

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

Fig. 2 is a side sectional view of the housing of the present invention.

In the figure: 1-incinerator, 2-air duct, 3-heat exchange box, 4-heat exchange pipe, 5-first connecting pipe, 6-second connecting pipe, 7-water inlet pipe, 8-first water temperature detection device, 9-second water temperature detector, 10-controller, 11-electric valve, 12-smoking pipe, 13-induced fan, 14-exhaust pipe, 15-housing, 16-motor, 17-turning disc, 18-connecting rod, 19-slider, 20-ejector, 21-arc cover, 22-ball, 23-drain pipe, 24-bracket, 25-support leg, a-water outlet, b-feed port , c-water inlet.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Referring to Fig. 1-2, the present invention provides a technical solution:

A device for recovering waste heat from waste incineration flue gas, comprising an incinerator 1, a heat exchange box 3 and a housing 15, a feed port b is provided under the front of the incinerator 1, and an air duct 2 is fixedly connected to the top of the incinerator 1 The other end of the air guide pipe 2 is fixedly connected to the heat exchange box 3, and the heat exchange box 3 is provided with a curved heat exchange tube 4, and the left end of the heat exchange tube 4 is fixedly connected to a second connecting pipe 6. The right end of the heat exchange tube 4 is fixedly connected with a first connecting pipe 5, and the top end of the second connecting pipe 6 is fixedly connected with a water inlet pipe 7, and an electric valve 11 is installed on the water inlet pipe 7, and the right end of the second connecting pipe 6 is connected to the casing 15, the first connecting pipe 5 and the second connecting pipe 6 are respectively fixedly installed with a first water temperature detector 8 and a second water temperature detector 9, and the top of the heat exchange box 3 is fixedly connected with a controller 10, so The controller 10 is electrically connected with the first water temperature detector 8 and the second water temperature detector 9 respectively, the bottom end of the heat exchange box 3 is fixedly connected with a support 24, and the inside of the support 24 is fixedly connected with an induced draft fan 13, so The input end of the induced draft fan 13 is fixedly connected with a smoking pipe 12, the output end of the induced draft fan 13 is fixedly connected with a smoke exhaust pipe 14, and the other end of the induced draft fan 12 is fixedly connected with the side wall of the heat exchange box 3. A motor 16 is fixedly connected to the rear bottom of the housing 15, and the main shaft of the motor 16 extends into the housing 15 and is fixedly connected to a rotating disk 17. There is a slider 19, the slider 19 is slidingly connected with the inner wall of the housing 15, the top of the slider 19 is fixedly connected with a push rod 20, the top of the housing 15 is provided with a water inlet c, and the top of the water inlet c An arc-shaped cover 21 is fixedly connected, and a ball 22 is arranged inside the arc-shaped cover 21 , and the top end of the arc-shaped cover 21 communicates with the first connecting pipe 5 .

The diameter of the ball 22 is 2-3 centimeters wider than the water inlet c, and the water inlet c can be sealed by the ball 22 to ensure that the amount of hot water sucked by the piston 19 is the same. The right side wall of the housing 15 has a The water outlet a, and the right end of the water outlet a is fixedly connected with a drain pipe 23, through which hot water is connected to the domestic water system, the bottom end of the incinerator 1 is fixedly connected with a support leg 25, and the incinerator 1 is Support, the controller 10 is electrically connected with the motor 16, and the switch of the motor 16 is controlled through the temperature comparison and analysis of the controller 10, so as to improve the accuracy and stability of the device and avoid the defects of manual detection.

Working process: Garbage is burned through the incinerator 1 to generate electricity. Due to the induced draft fan 13, the high-temperature flue gas enters the heat exchange box 3 through the air guide pipe 2, the electric valve 11 is opened, and cold water enters the heat exchange pipe 4 from the water inlet pipe 7 and The hot gas in the heat exchange box 3 exchanges heat, and the cold water is heated up. Since the first connecting pipe 5 and the second connecting pipe 6 are equipped with water temperature detectors, it can detect the temperature change of the flowing water before and after the heat exchange. When the temperature difference exceeds the preset value , the controller 10 controls the electric valve 11 to open, the motor 16 starts, and the motor 16 drives the rotating disk 17 to rotate. Due to the structural design of the rotating disk 17, the connecting rod 18 and the piston 19, the piston 19 slides up and down inside the housing 15, and the top The setting of the rod 20 and the ball 22 can ensure quantitative extraction of the hot water in the heat exchange tube 4 to be discharged through the water outlet a, and then connected to the domestic water through the drain pipe 23. When the water temperature detector detects that the temperature difference between the front and back of the water flow is lower than the preset value, the controller 10 controls the electric valve 11 to close, and the motor 16 to close, so that the water in the heat exchange tube 4 cannot flow, so that the high-temperature flue gas continues to heat the cold water in the heat exchange tube 4, thereby making the hot water conversion more stable , the conversion efficiency is higher, and it is better that when the inspector detects that the temperature difference is too low, by adjusting the speed of the motor and the water inlet flow rate of the water inlet pipe, it can ensure that the water in the heat exchange pipe 4 is discharged without intermittent heat exchange, further improving In this way, the conversion efficiency of the device can achieve the expected use effect and ensure the reasonable operation of the device.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (5)

1. A waste heat recovery device for waste incineration flue gas, comprising an incinerator (1), a heat exchange box (3) and a housing (15), characterized in that: a feed inlet is provided under the front of the incinerator (1) (b), the top of the incinerator (1) is fixedly connected with an air guide pipe (2), the other end of the air guide pipe (2) is fixedly connected with the heat exchange box (3), and the heat exchange box (3) is equipped with There is a curved heat exchange tube (4), the left end of the heat exchange tube (4) is fixedly connected with the second connecting pipe (6), and the right end of the heat exchange tube (4) is fixedly connected with the first connecting pipe (5), The top of the second connecting pipe (6) is fixedly connected with the water inlet pipe (7), and the electric valve (11) is installed on the water inlet pipe (7), and the right end of the second connecting pipe (6) communicates with the casing (15) , the first connecting pipe (5) and the second connecting pipe (6) are respectively fixedly installed with a first water temperature detector (8) and a second water temperature detector (9), and the top of the heat exchange box (3) A controller (10) is fixedly connected, and the controller (10) is electrically connected to the first water temperature detector (8) and the second water temperature detector (9) respectively, and the bottom end of the heat exchange box (3) is fixed A bracket (24) is connected, and an induced draft fan (13) is fixedly connected inside the bracket (24), and the input end of the induced draft fan (13) is fixedly connected with a smoking pipe (12), and the induced draft fan (13) The output end is fixedly connected with a smoke exhaust pipe (14), the other end of the smoke pipe (12) is fixedly connected with the side wall of the heat exchange box (3), and the bottom end of the housing (15) is fixedly connected with a motor (16 ), the main shaft of the motor (16) extends into the housing (15) and is fixedly connected with a rotating disc (17), and the edge of the rotating disc (17) is fixedly and rotatingly connected with a connecting rod (18), and the connecting rod (18) A slider (19) is hinged at the top, and the slider (19) is slidingly connected to the inner wall of the casing (15). ) is provided with a water inlet (c) at the top, and the top of the water inlet (c) is fixedly connected with an arc-shaped cover (21), and a ball (22) is arranged inside the arc-shaped cover (21). (21) The top end communicates with the first connecting pipe (5). 2. A waste heat recovery device for waste incineration flue gas according to claim 1, characterized in that: the diameter of the ball (22) is 2-3 cm wider than the water inlet (c). 3. A waste heat recovery device for waste incineration flue gas according to claim 1, characterized in that: a water outlet (a) is opened on the right side wall of the housing (15), and the right end of the water outlet (a) is fixedly connected There is a drain pipe (23). 4. The waste heat recovery device for waste incineration flue gas according to claim 1, characterized in that: the bottom end of the incinerator (1) is fixedly connected with a support leg (25). 5. The waste heat recovery device of waste incineration flue gas according to claim 1, characterized in that: the controller (10) is electrically connected to the motor (16).