Energy-saving device of gas-fired boiler

Abstract

The utility model discloses a gas-fired boiler energy-saving device which comprises a heat preservation barrel, a gas-fired boiler, a boiler energy saver, a discharge energy saver and a water supplementing module with a water supplementing barrel. The heat preservation barrel is provided with a first water inlet, a second water inlet and a first water outlet, the gas boiler is provided with a third water inlet and a first exhaust port, and the boiler energy saver is provided with a first air inlet, a fourth water inlet, a second water outlet and a second exhaust port. A second air inlet, a third air outlet, a fifth water inlet and a third water outlet are formed in the discharging energy saver, the first water outlet is communicated with the third water inlet, the first air outlet is communicated with the first air inlet, the second air outlet is communicated with the second air inlet, the second water outlet is communicated with the second water inlet, and the third water outlet is communicated with the fourth water inlet; and the water supplementing module is communicated with the fifth water inlet. According to the device, heat of discharged high-temperature waste gas is used for heating water, the heat utilization rate is increased, and the energy cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler energy saving, in particular to an energy saving device for a gas boiler. Background Art

[0002] Gas boilers use natural gas as fuel and emit high-temperature exhaust gas, the temperature of which generally exceeds 145°C.

[0003] The gas boilers in existing workshops are directly fed with tap water, which has a temperature of 15-25°C. When the weather temperature is low, the tap water temperature will be even lower. After entering the gas boiler, steam is formed, and the steam is above 145°C. The temperature difference is large, which will cause the gas boiler to consume a large amount of natural gas to generate heat, resulting in an increase in energy costs. In addition, the high-temperature exhaust gas generated is directly discharged from the gas boiler to the outdoors, with low heat utilization and waste of heat. Therefore, a new technical solution is urgently needed to solve at least one of the above technical problems. Summary of the invention

[0004] The utility model aims to provide a gas boiler energy-saving device, which utilizes the heat of discharged high-temperature exhaust gas to heat water, improves heat utilization rate and saves energy costs.

[0005] In order to achieve the above technical objectives and meet the above technical requirements, the technical solution adopted by the utility model is: a gas boiler energy-saving device, characterized in that it includes an insulation barrel, a gas boiler, a boiler economizer, an emission economizer, and a water replenishment module with a water replenishment barrel;

[0006] The insulation barrel is provided with a first water inlet, a second water inlet and a first water outlet, the gas boiler is provided with a third water inlet and a first exhaust port, the boiler economizer is provided with a first air inlet, a fourth water inlet, a second water outlet and a second exhaust port, the emission economizer is provided with a second air inlet, a third exhaust port, a fifth water inlet and a third water outlet, the first water outlet is connected to the third water inlet, the first exhaust port is connected to the first air inlet, the second exhaust port is connected to the second air inlet, the second water outlet is connected to the second water inlet, the third water outlet is connected to the fourth water inlet, and the water replenishment module is connected to the fifth water inlet.

[0007] As a preferred technical solution, the water replenishment module includes a water replenishment switch valve, a water softener, the water replenishment bucket, a water replenishment one-way valve, and a water replenishment pump which are connected in sequence, and the water replenishment pump is connected to the fifth water inlet.

[0008] As a preferred technical solution, at least one pumping module is arranged between the insulation barrel and the gas boiler, and the pumping module includes a first pumping switch valve, a pumping pump, and a second pumping switch valve connected in sequence, the first pumping switch valve is connected to the first water outlet, and the second pumping switch valve is connected to the third water inlet.

[0009] As a preferred technical solution, a solenoid valve and a temperature controller are sequentially connected between the second water outlet and the second water inlet, the water replenishment pump is electrically connected to the temperature controller, and the temperature controllers are electrically connected to each other.

[0010] As a preferred technical solution, the insulation barrel is an 8T insulation barrel.

[0011] As a preferred technical solution, at least one liquid level meter is provided in the insulation barrel.

[0012] As a preferred technical solution, the number of the pumping modules is 2, and the 2 pumping modules are arranged in parallel.

[0013] The beneficial effects of the utility model are:

[0014] 1) The water in the water replenishment bucket is passed into the discharge economizer, and the high-temperature exhaust gas of the gas boiler is discharged through the boiler economizer and the discharge economizer. The high-temperature exhaust gas heats the water in the discharge economizer, and the heated water is passed into the boiler economizer for further heating. Then the water in the boiler economizer is passed into the insulation bucket. The temperature of the water in the insulation bucket will be greater than 25°C, which can reduce the temperature difference between the insulation bucket and the gas boiler, improve the heat recovery rate and save energy at the same time;

[0015] 2) The water supply switch valve is opened, tap water is introduced, and it enters the water softener to be converted into soft water, and then enters the soft water bucket. The soft water in the soft water bucket enters the discharge economizer for heating, which is not easy to produce scale;

[0016] 3) The water pump speeds up the flow of water and improves work efficiency;

[0017] 4) Two pumping modules are more efficient. If one of the pumping modules is damaged, the entire device can still continue to operate;

[0018] 5) The temperature controller and solenoid valve work together to achieve automatic control according to different temperatures;

[0019] 6) The liquid level gauge can indicate the liquid level in the thermos barrel, and water can be added in time according to usage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of a device of an embodiment provided by the utility model;

[0021] Figure 2It is a schematic diagram of a boiler economizer according to an embodiment of the utility model;

[0022] Figure 3 This is an internal structural diagram of a boiler economizer according to an embodiment of the utility model;

[0023] exist Figure 1-Figure 3 Among them, 1. Insulated barrel; 2. Gas boiler; 3. Boiler economizer; 301. Cylinder; 302. First conical shell; 303. Second conical shell; 304. Large steel pipe; 305. Small steel pipe; 4. Discharge economizer; 5. Water replenishment barrel; 6. Water replenishment switch valve; 7. Water softener; 8. Water replenishment one-way valve; 9. Water replenishment pump; 10. First pumping switch valve; 11. Pumping pump; 12. Second pumping switch valve; 13. Solenoid valve; 14. Temperature controller; 15. Liquid level meter. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings.

[0025] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "head", "tail", "top", "bottom", "left", "right", "front", "back", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] See also Figure 1 An embodiment of the utility model provides a gas boiler energy-saving device, comprising an insulation barrel 1, a gas boiler 2, a boiler economizer 3, an emission economizer 4, and a water replenishment module with a water replenishment barrel 5, wherein the insulation barrel 1 is provided with a first water inlet, a second water inlet and a first water outlet, the gas boiler 2 is provided with a third water inlet and a first exhaust port, the boiler economizer 3 is provided with a first air inlet, a fourth water inlet, a second water outlet and a second exhaust port, the emission economizer 4 is provided with a second air inlet, a third exhaust port, a fifth water inlet and a third water outlet, the first water outlet is connected to the third water inlet, the first exhaust port is connected to the first air inlet, the second exhaust port is connected to the second air inlet, the second water outlet is connected to the second water inlet, the third water outlet is connected to the fourth water inlet, and the water replenishment module is connected to the fifth water inlet.

[0027] The water in the water replenishment barrel 5 is passed into the emission economizer 4, and the high-temperature exhaust gas of the gas boiler 2 is discharged through the boiler economizer 3 and the emission economizer 4. The high-temperature exhaust gas heats the water in the emission economizer 4, and the heated water is passed into the boiler economizer 3 to continue heating, and then the water in the boiler economizer 3 is passed into the insulation barrel 1. The temperature of the water in the insulation barrel 1 will be greater than 25°C, which can reduce the temperature difference between the insulation barrel 1 and the gas boiler 2, thereby improving the heat recovery rate and saving energy.

[0028] like Figure 1 As shown, in some embodiments, the water replenishment module includes a water replenishment switch valve 6, a water softener 7, a water replenishment barrel 5, a water replenishment one-way valve 8, and a water replenishment pump 9 which are connected in sequence. The water replenishment pump 9 is connected to the fifth water inlet. The water replenishment switch valve 6 is opened, and tap water is introduced into the water softener 7 to be converted into soft water, and then enters the water replenishment barrel 5. The soft water in the water replenishment barrel 5 enters the discharge economizer 4 for heating, which is not easy to produce scale.

[0029] like Figure 1 As shown, in some embodiments, at least one pumping module is arranged between the insulation barrel 1 and the gas boiler 2, and the pumping module includes a first pumping switch valve 10, a pumping pump 11, and a second pumping switch valve 12 which are connected in sequence, the first pumping switch valve 10 is connected to the first water outlet, the second pumping switch valve 12 is connected to the third water inlet, the pumping pump 11 accelerates the flow of water and improves work efficiency, and a water reservoir is generally arranged in front of the insulation barrel 1, and a pumping pump 11 is arranged between the water reservoir and the insulation barrel 1 to prevent insufficient water storage in the insulation barrel 1 when the water is cut off.

[0030] Furthermore, the number of the pumping modules is 2, and the 2 pumping modules are arranged in parallel. The 2 pumping modules are more efficient, and if one of the pumping modules is damaged, the entire device can still continue to operate.

[0031] like Figure 1 As shown, in some embodiments, a solenoid valve 13 and a temperature controller 14 are sequentially connected between the second water outlet and the second water inlet, the water replenishment pump 9 is electrically connected to the temperature controller 14, and the temperature controller 14 is electrically connected to the temperature controller 14, and the temperature controller 14 and the solenoid valve 13 cooperate to achieve automatic control according to different temperatures.

[0032] like Figure 1 As shown, in some of the embodiments, the insulation barrel 1 is an 8T insulation barrel 1, and the gas boiler 2 is a 3T gas boiler 2. The insulation barrel 1 has a large capacity and can hold enough water.

[0033] Furthermore, at least one liquid level gauge 15 is provided in the insulation barrel 1, and generally one liquid level gauge 15 is provided at 1T and 4T respectively. When the liquid level in the insulation barrel 1 drops to 1T or 4T, water is introduced in time.

[0034] like Figure 1 As shown, in some embodiments, the boiler economizer 3 includes a hollow cylinder 301, a first conical shell 302 and a second conical shell 303 respectively fastened at both ends of the cylinder 301, and a plurality of heat dissipation pipe groups fixedly arranged in the cylinder 301, the heat dissipation pipe group includes 112-120 large steel pipes 304 with an outer diameter of 48 mm and a wall thickness of 3.5 mm, and 14 small steel pipes 305 with an outer diameter of 32 mm and a wall thickness of 3.2 mm. Generally, a porous plate is welded on the inner wall of the cylinder 301, and the large steel pipes 304 and the small steel pipes 305 are inserted on the porous plate. The tube 304 and the small steel tube 305 are welded to the porous plate. The large steel tube 304 is as full as possible on the porous plate. The large steel tube 304 is arranged linearly. The small steel tube 305 fills the gap between the inner wall of the cylinder 301 and the large steel tube 304, which can make full use of the heat of the high-temperature exhaust gas. If the wall thickness of the small steel tube 305 is less than 3.2 mm, it is easy to break. If the wall thickness of the small steel tube 305 is greater than 3.2 mm, the thermal conductivity is poor. A jacket is arranged on the outside of the cylinder 301, and water is directly introduced into the jacket, or a spiral tube can be arranged in the jacket for introducing water. Other details are conventional settings and will not be repeated. The emission economizer 4 adopts a conventional fin or tube heat dissipation structure and a rectangular box, which will not be repeated.

[0035] The working process of the device provided by a preferred embodiment of the utility model is as follows:

[0036] Water is passed into the insulation barrel 1, and the water pump 11 in the pumping module pumps the water in the insulation barrel 1 into the gas boiler 2. After generating steam, the water temperature in the water supply barrel 5 is generally 15℃-25℃. After entering the gas boiler 2, the temperature is above 145℃. The high-temperature exhaust gas discharged by the gas boiler 2 is between 145℃-155℃. The high-temperature exhaust gas passes through the boiler economizer 3 and then enters the emission economizer 4. The water supply pump 9 passes the water into the emission economizer 4 for preliminary heating, and then enters the boiler economizer 3 for further heating. The final water temperature reaches 80℃-90℃, and then the water in the boiler economizer 3 is passed into the insulation barrel 1, and the insulation barrel 1 is passed into tap water and mixed with the water in the boiler economizer 3 and then passed into the gas boiler 2 for heating. The temperature difference is reduced, and the required natural gas is reduced, thereby reducing energy costs and saving energy. At the same time, the exhaust gas discharged from the emission economizer 4 is only 55℃-65℃, making full use of heat.

[0037] The applicant has found that if 20°C water is passed into the gas boiler 2, the steam pressure will drop by 0.8 MPa. If the water is heated by the device of the utility model and then passed into the insulation barrel 1 to increase the water temperature in the insulation barrel 1, and then the gas boiler 2 is passed into the water, the steam pressure can be kept stable, and even if the steam pressure drops, it will not exceed 0.8 MPa.

[0038] The above embodiments are merely descriptions for clearly illustrating the present invention, and are not limitations on the implementation methods. For technicians in the relevant field, other different forms of changes or modifications can be made based on the above descriptions. It is not necessary and impossible to list all the implementation methods here, and the obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A gas boiler energy-saving device, characterized in that: It includes a heat preservation barrel, a gas boiler, a boiler economizer, an emission economizer, and a water replenishment module with a water replenishment barrel; The insulation barrel is provided with a first water inlet, a second water inlet and a first water outlet, the gas boiler is provided with a third water inlet and a first exhaust port, the boiler economizer is provided with a first air inlet, a fourth water inlet, a second water outlet and a second exhaust port, the emission economizer is provided with a second air inlet, a third exhaust port, a fifth water inlet and a third water outlet, the first water outlet is connected to the third water inlet, the first exhaust port is connected to the first air inlet, the second exhaust port is connected to the second air inlet, the second water outlet is connected to the second water inlet, the third water outlet is connected to the fourth water inlet, and the water replenishment module is connected to the fifth water inlet.

2. The gas boiler energy-saving device according to claim 1, characterized in that: The water replenishment module includes a water replenishment switch valve, a water softener, the water replenishment bucket, a water replenishment one-way valve, and a water replenishment pump which are connected in sequence, and the water replenishment pump is connected to the fifth water inlet.

3. The gas boiler energy-saving device according to claim 2, characterized in that: At least one pumping module is arranged between the insulation barrel and the gas boiler, and the pumping module includes a first pumping switch valve, a pumping pump, and a second pumping switch valve which are connected in sequence, the first pumping switch valve is connected to the first water outlet, and the second pumping switch valve is connected to the third water inlet.

4. The gas boiler energy-saving device according to claim 3, characterized in that: A solenoid valve and a temperature controller are sequentially connected between the second water outlet and the second water inlet, the water replenishment pump is electrically connected to the temperature controller, and the temperature controllers are electrically connected to each other.

5. The gas boiler energy-saving device according to claim 1, characterized in that: The insulation barrel is an 8T insulation barrel.

6. The gas boiler energy-saving device according to claim 5, characterized in that: At least one liquid level meter is arranged in the heat preservation barrel.

7. The gas boiler energy-saving device according to claim 3, characterized in that: The number of the pumping modules is 2, and the 2 pumping modules are arranged in parallel.

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