Industrial boiler flue gas waste heat recovery energy-saving purification device

Abstract

The utility model relates to the technical field of boiler flue gas treatment, in particular to an industrial boiler flue gas waste heat recovery energy-saving purification device, which performs preliminary heat exchange on newly discharged flue gas through a heat exchange device, quickly reduces the temperature of the flue gas, reduces the influence of high-temperature flue gas on a subsequent purification equipment circuit, and improves the purification efficiency. Water to be added into the boiler is preheated through the preheating device by means of the temperature of flue gas, so that the influence of the process of adding water into the boiler on the overall water temperature in the boiler is reduced, dust and dirt in the flue gas are cleaned through the purification device, the labor intensity needed by an operator in the cleaning process of the purification device is reduced, and the cleaning efficiency is improved. The practicability of the device is improved; comprising a heat exchange device, a preheating device and a purification device, the preheating device is connected with the heat exchange device, and the purification device is connected with the preheating device.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler flue gas treatment, in particular to an industrial boiler flue gas waste heat recovery energy-saving purification device. Background Art

[0002] An industrial boiler flue gas waste heat recovery energy-saving purification device is specially designed to improve the energy efficiency of industrial boilers and reduce environmental pollution; this device integrates flue gas waste heat recovery, energy saving and purification functions, and can significantly reduce the energy consumption of industrial boilers and the impact of emissions on the environment; it is an efficient, environmentally friendly, intelligent energy-saving equipment, which is of great significance for improving the energy efficiency of industrial boilers and reducing environmental pollution.

[0003] The Chinese utility model patent with application number CN202220380208.0 in the prior art involves an industrial boiler flue gas purification heat energy recovery device, including a blast dust collector, an electrostatic precipitator, an induced draft fan, a water jacket, a heat conduction plate and a main shell, etc., which can improve the utilization rate of the heat contained in the flue gas, help reduce investment and operating costs, and benefit the enterprise benefits.

[0004] However, in actual use of the above device, the dust accumulated in the electrostatic precipitator will adhere to the inner wall of the bottom or cause blockage. The operator is required to continuously knock on the bottom shell every time cleaning is performed to improve the cleaning effect, which increases the labor intensity of the operator. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides an industrial boiler flue gas waste heat recovery and energy-saving purification device for energy-saving, which performs preliminary heat exchange on newly exhausted flue gas through a heat exchange device, quickly reduces the flue gas temperature, reduces the impact of high-temperature flue gas on subsequent purification equipment circuits, and preheats water to be added to the boiler using the flue gas temperature through a preheating device, thereby reducing the impact of the process of adding water to the boiler on the overall water temperature in the boiler. The dust and dirt in the flue gas are cleaned through a purification device, which reduces the labor intensity required for operators to clean the purification device, thereby improving the practicability of the device.

[0006] The utility model discloses an energy-saving purification device for waste heat recovery of industrial boiler flue gas; it comprises a heat exchange device, a preheating device and a purification device, the preheating device is connected to the heat exchange device, and the purification device is connected to the preheating device; the heat exchange device is used to perform preliminary heat exchange on the newly exhausted flue gas, so as to quickly reduce the flue gas temperature and reduce the influence of the high-temperature flue gas on the subsequent purification equipment circuit; the preheating device is used to preheat the water to be added to the boiler by using the flue gas temperature, so as to reduce the influence of the process of adding water to the boiler on the overall water temperature in the boiler; the purification device is used to clean the dust and dirt in the flue gas, so as to reduce the labor intensity required for the operator to clean the purification device, thereby improving the practicality of the device.

[0007] Preferably, the heat exchange device comprises an insulation pipe, an insulation box, a heat exchange box, an exhaust pipe and a special-shaped heat exchange pipe, the heat exchange box is installed in the insulation box, an air inlet is arranged on the upper end surface of the heat exchange box, the air inlet of the heat exchange box is connected with the insulation pipe, the upper part of the insulation pipe passes through the upper end surface of the insulation box and is connected to the boiler exhaust port, a plurality of groups of special-shaped heat exchange pipes are installed in the heat exchange box, the left and right ports of the special-shaped heat exchange pipes are connected to the left and right end surfaces of the heat exchange box, the upper part of the special-shaped heat exchange pipes is inclined and the upper parts of adjacent special-shaped heat exchange pipes are inclined in opposite directions, and the lower part of the heat exchange box is provided with an air outlet , an exhaust pipe is connected to the air outlet; the high-temperature flue gas generated by the boiler enters the heat exchange box through the insulation pipe, and the heat loss in the high-temperature flue gas is reduced through the insulation pipe. The heat exchange liquid is introduced into the insulation box in conjunction with the preheating device, so that the heat of the flue gas is transferred to the heat exchange liquid through the special-shaped heat exchange pipe. The upper part of the special-shaped heat exchange pipe is inclined, so that the high-temperature liquid flows out of the special-shaped heat exchange pipe from the inside of the special-shaped heat exchange pipe to the inside of the insulation box, preventing the heated liquid from remaining in the special-shaped heat exchange pipe to affect the heat exchange effect of the special-shaped heat exchange pipe, thereby improving the practicability of the device.

[0008] Preferably, the preheating device includes a water tank, a water pump, an insulated water storage tank, a heat exchange tube and a heat sink. A water pump is installed on the side of the water tank, the input end of the water pump is connected to the inside of the water tank, and the output end of the water pump is connected to the bottom of the insulated box. An insulated water storage tank is installed on the upper end surface of the water tank, the top of the insulated box is connected to the input end of the heat exchange tube, the middle of the heat exchange tube passes into the insulated water storage tank and is coiled in an S shape, the output end of the heat exchange tube is connected to the top of the water tank, and multiple groups of heat sinks are arranged on the outer surface of the middle part of the heat exchange tube; the desalted water to be added to the boiler is stored in the insulated water storage tank, the water pump is turned on to extract the heat exchange liquid in the water tank and pressurized it to the inside of the insulated box, the heat exchange box and the special-shaped heat exchange tube are used to perform preliminary heat exchange on the flue gas to reduce the temperature of the flue gas, and then the liquid enters the insulated water storage tank from the heat exchange tube to exchange heat with the desalted water, the heat exchange efficiency of the heat exchange tube is improved by multiple groups of heat sinks, and then the heat exchange liquid flows back to the inside of the water tank, thereby improving the practicability of the device.

[0009] Preferably, it also includes a liquid level sensor. The fixed end surface of the insulation box is equipped with the liquid level sensor, and the sensing end of the liquid level sensor extends through the upper end surface of the insulation box to the upper part of the insulation box. The liquid level in the insulation box is monitored by the liquid level sensor, and the loss of heat exchange liquid is monitored in time to prevent the normal operation of the equipment from being affected by the lack of heat exchange liquid, thereby improving the practicability of the device.

[0010] Preferably, it also includes a solenoid valve and a water outlet pipe. The lower part of the insulated water tank is provided with a desalted water inlet, and the top of the insulated water tank is connected to the boiler water inlet through the water outlet pipe, and the water outlet pipe is installed with a solenoid valve. The output rate of the desalted water in the insulated water tank is controlled by the solenoid valve to adapt to the preheating efficiency of the preset device to ensure that the temperature of the desalted water output to the boiler reaches the required temperature, thereby improving the practicability of the device.

[0011] Preferably, the purification device includes an electrostatic dust collector, a dust storage hopper, a plate-type solenoid valve and a vibration motor. The electrostatic dust collector is installed on the side of the insulation box through a bracket, the output end of the exhaust pipe is connected to the lower part of the electrostatic dust collector, the lower part of the electrostatic dust collector is provided with a dust storage hopper, the lower end surface of the dust storage hopper is provided with a sewage outlet, the sewage outlet is installed with a plate-type solenoid valve, and the vibration motor is installed at the lower part of the side of the electrostatic dust collector; the electrostatic dust collector is used to remove dust from the cooled flue gas, the dust storage hopper is used to store and collect the fallen dust, the plate-type solenoid valve is used to control the opening and closing of the sewage outlet at the bottom of the dust storage hopper, and when the dust accumulated in the electrostatic dust collector is cleaned, the plate-type solenoid valve and the vibration motor are opened, and the vibration motor transmits power to the electrostatic dust collector to drive the lower part of the electrostatic dust collector and the dust storage hopper to vibrate, thereby improving the discharge efficiency of dust in the electrostatic dust collector, and reducing the dust and debris adhering to the inner wall of the electrostatic dust collector and the dust storage hopper, reducing the labor intensity of the operator, and improving the practicability of the device.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: preliminary heat exchange is performed on the newly exhausted flue gas through the heat exchange device, the flue gas temperature is quickly reduced, and the influence of the high-temperature flue gas on the subsequent purification equipment circuit is reduced; the water to be added to the boiler is preheated by the flue gas temperature through the preheating device, thereby reducing the influence of the process of adding water to the boiler on the overall water temperature in the boiler; the dust and dirt in the flue gas are cleaned by the purification device, thereby reducing the labor intensity required for the operator to clean the purification device, thereby improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a first axonometric structural schematic diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the first cross-sectional structure of the utility model;

[0015] Figure 3 It is a second cross-sectional structural schematic diagram of the utility model;

[0016] Figure 4 It is a second axonometric structural schematic diagram of the utility model;

[0017] Figure 5 is a schematic diagram of the cross-sectional structure of a heat exchange device;

[0018] Markings in the attached figure: 1. Insulation pipe; 2. Insulation box; 3. Heat exchange box; 4. Exhaust pipe; 5. Special-shaped heat exchange pipe; 6. Water tank; 7. Water pump; 8. Insulation water storage tank; 9. Heat exchange pipe; 10. Heat sink; 11. Liquid level sensor; 12. Solenoid valve; 13. Water outlet pipe; 14. Electrostatic precipitator; 15. Dust storage hopper; 16. Plate-type solenoid valve; 17. Vibration motor. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive. Example

[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The preheating device is connected to the heat exchange device, and the purification device is connected to the heat exchange device;

[0021] First, the flue gas enters the insulation box 2 through the insulation pipe 1, and at the same time, the water pump 7 is turned on to extract the heat exchange liquid in the water tank 6 and transmit it to the insulation box 2 under pressure. The heat exchange box 3 and the special-shaped heat exchange pipe 5 are used to perform preliminary heat exchange on the flue gas to reduce the temperature of the flue gas. Then, the liquid enters the insulation water storage tank 8 through the heat exchange pipe 9 to exchange heat with the desalted water. The cooled flue gas enters the electrostatic precipitator 14 through the exhaust pipe 4. The dust and impurities in the flue gas are removed by the electrostatic precipitator 14. Then, when cleaning the dust accumulated in the electrostatic precipitator 14, the plate solenoid valve 16 and the vibration motor 17 are turned on. The vibration motor 17 transmits power to the electrostatic precipitator 14 to drive the lower part of the electrostatic precipitator 14 and the dust storage hopper 15 to vibrate, so that the dust in the dust storage hopper 15 can be discharged;

[0022] The heat exchange device includes an insulation pipe 1, an insulation box 2, a heat exchange box 3, an exhaust pipe 4 and a special-shaped heat exchange pipe 5. The heat exchange box 3 is installed in the insulation box 2. An air inlet is arranged on the upper end surface of the heat exchange box 3. The air inlet of the heat exchange box 3 is connected with the insulation pipe 1. The upper part of the insulation pipe 1 passes through the upper end surface of the insulation box 2 and is connected with the boiler exhaust port. A plurality of groups of special-shaped heat exchange pipes 5 are installed in the heat exchange box 3. The left and right ports of the special-shaped heat exchange pipes 5 are connected with the left and right end surfaces of the heat exchange box 3. The upper part of the special-shaped heat exchange pipes 5 is inclined and the upper parts of adjacent special-shaped heat exchange pipes 5 are inclined in opposite directions. The lower part of the heat exchange box 3 is provided with an air outlet, and the air outlet is connected with the exhaust pipe 4.

[0023] The preheating device includes a water tank 6, a water pump 7, an insulated water storage tank 8, a heat exchange tube 9 and a heat sink 10. The water pump 7 is installed on the side of the water tank 6. The input end of the water pump 7 is connected to the inside of the water tank 6. The output end of the water pump 7 is connected to the bottom of the insulated box 2. The insulated water storage tank 8 is installed on the upper end surface of the water tank 6. The top of the insulated box 2 is connected to the input end of the heat exchange tube 9. The middle part of the heat exchange tube 9 is passed into the insulated water storage tank 8 and is coiled in an S shape. The output end of the heat exchange tube 9 is connected to the top of the water tank 6. A plurality of groups of heat sinks 10 are arranged on the outer surface of the middle part of the heat exchange tube 9.

[0024] It also includes a liquid level sensor 11, which is installed on the fixed end surface of the insulation box 2, and the sensing end of the liquid level sensor 11 passes through the upper end surface of the insulation box 2 and extends to the upper part of the insulation box 2;

[0025] It also includes a solenoid valve 12 and a water outlet pipe 13. The lower part of the thermal insulation water storage tank 8 is provided with a desalted water inlet. The top of the thermal insulation water storage tank 8 is connected to the boiler water inlet through the water outlet pipe 13. The solenoid valve 12 is installed on the water outlet pipe 13.

[0026] The purification device includes an electrostatic precipitator 14, a dust storage hopper 15, a plate-type solenoid valve 16 and a vibration motor 17. The electrostatic precipitator 14 is installed on the side of the heat preservation box 2 through a bracket, and the output end of the exhaust pipe 4 is connected to the lower part of the electrostatic precipitator 14. The lower part of the electrostatic precipitator 14 is provided with a dust storage hopper 15, and the lower end surface of the dust storage hopper 15 is provided with a sewage outlet, and the plate-type solenoid valve 16 is installed on the sewage outlet. The vibration motor 17 is installed at the lower part of the side of the electrostatic precipitator 14;

[0027] The newly exhausted flue gas is subjected to preliminary heat exchange by means of the heat exchange device, so as to quickly reduce the flue gas temperature and reduce the impact of the high-temperature flue gas on the subsequent purification equipment circuit. The water to be added to the boiler is preheated by means of the preheating device using the flue gas temperature, thereby reducing the impact of the process of adding water to the boiler on the overall water temperature in the boiler. The dust and dirt in the flue gas are cleaned by the purification device, thereby reducing the labor intensity required for the operator to clean the purification device and improving the practicability of the device.

[0028] The electrostatic dust collector 14, liquid level sensor 11, plate-type solenoid valve 16, solenoid valve 12, water pump 7 and vibration motor 17 of the utility model of an industrial boiler flue gas waste heat recovery and energy-saving purification device are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for creative labor by technicians in this field.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An industrial boiler flue gas waste heat recovery energy-saving purification device; characterized in that: The invention comprises a heat exchange device, a preheating device and a purification device, wherein the preheating device is connected to the heat exchange device, and the purification device is connected to the preheating device; the heat exchange device comprises an insulation pipe (1), an insulation box (2), a heat exchange box (3), an exhaust pipe (4) and a special-shaped heat exchange pipe (5); the heat exchange box (3) is installed in the insulation box (2); an air inlet is arranged on the upper end surface of the heat exchange box (3); the air inlet of the heat exchange box (3) is connected to the insulation pipe (1); the upper part of the insulation pipe (1) passes through the upper end surface of the insulation box (2) and is connected to the exhaust port of the boiler; A plurality of groups of special-shaped heat exchange tubes (5) are installed in the box (3), the left and right ports of the special-shaped heat exchange tubes (5) are connected to the left and right end surfaces of the heat exchange box (3), the upper portion of the special-shaped heat exchange tubes (5) is inclined, and the upper portions of adjacent special-shaped heat exchange tubes (5) are inclined in opposite directions, and the lower portion of the heat exchange box (3) is provided with an air outlet, and the air outlet is connected to an exhaust pipe (4); the preheating device comprises a water tank (6), a water pump (7), a heat-insulating water storage tank (8), a heat exchange tube (9) and a heat sink (10), and a water pump (7) is installed on the side of the water tank (6). 7), the input end of the water pump (7) is connected to the inside of the water tank (6), the output end of the water pump (7) is connected to the bottom of the heat preservation box (2), an insulation water storage tank (8) is installed on the upper end surface of the water tank (6), the top of the heat preservation box (2) is connected to the input end of the heat exchange tube (9), the middle of the heat exchange tube (9) is connected to the inside of the heat preservation water storage tank (8) and is arranged in an S-shaped coil, the output end of the heat exchange tube (9) is connected to the top of the water tank (6), and a plurality of heat sinks (10) are arranged on the outer surface of the middle of the heat exchange tube (9); the purification device includes an electrostatic A dust collector (14), a dust storage hopper (15), a plate-type electromagnetic valve (16) and a vibration motor (17); the electrostatic dust collector (14) is mounted on the side of the heat preservation box (2) via a bracket; the output end of the exhaust pipe (4) is connected to the lower part of the electrostatic dust collector (14); the lower part of the electrostatic dust collector (14) is provided with a dust storage hopper (15); the lower end surface of the dust storage hopper (15) is provided with a sewage outlet; the sewage outlet is installed with a plate-type electromagnetic valve (16); and the lower part of the side of the electrostatic dust collector (14) is installed with a vibration motor (17).

2. The industrial boiler flue gas waste heat recovery and energy-saving purification device according to claim 1, characterized in that: It also includes a liquid level sensor (11), which is mounted on a fixed end surface of the heat preservation box (2), and a sensing end of the liquid level sensor (11) passes through the upper end surface of the heat preservation box (2) and extends to the upper part of the heat preservation box (2).

3. The industrial boiler flue gas waste heat recovery and energy-saving purification device according to claim 1, characterized in that: It also includes a solenoid valve (12) and a water outlet pipe (13). The lower part of the thermal insulation water storage tank (8) is provided with a desalted water inlet. The top of the thermal insulation water storage tank (8) is connected to the boiler water inlet through the water outlet pipe (13). The solenoid valve (12) is installed on the water outlet pipe (13).

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