Flue gas recovery economizer for fuel gas and oil burning boiler

Abstract

The utility model discloses a fuel gas and oil burning boiler flue gas recovery economizer, which relates to the field of flue gas recovery and comprises a flue gas heat exchange box body, a fuel gas and oil burning boiler connecting pipe is arranged at one end of the flue gas heat exchange box body, and a heat exchange component is arranged in the flue gas heat exchange box body and positioned on the side edge of the fuel gas and oil burning boiler connecting pipe; a first partition plate and a second partition plate are arranged in the middle of the flue gas heat exchange box body, the first partition plate is connected with the inner top of the flue gas heat exchange box body, the second partition plate is connected with the inner bottom of the flue gas heat exchange box body, and a first outlet pipeline is arranged at the end, away from the gas and oil burning boiler connecting pipe, of the flue gas heat exchange box body; a neutralizing assembly is arranged at the top end between the heat exchange assembly and the first partition plate, and a stirring mechanism is arranged between the first partition plate and the second partition plate. According to the utility model, the energy efficiency can be improved, the pollutant emission can be effectively controlled and reduced, and the current environment-friendly and energy-saving trend is met.

Description

Technical Field

[0001] The utility model relates to the field of smoke recovery, in particular to a smoke recovery energy saver for a gas or oil-fired boiler. Background Art

[0002] The flue gas recovery economizer for gas and oil-fired boilers is a device that can utilize the heat in the flue gas discharged by the boiler to improve the thermal efficiency of the boiler and reduce energy consumption and pollution emissions. Its principle is to transfer the heat in the flue gas to water or air through a heat exchanger, thereby heating the boiler's feed water or combustion air, reducing the boiler's flue gas temperature and dew point, and achieving the purpose of energy saving and emission reduction.

[0003] For example, Chinese patent 202022340032.X discloses a flue gas recovery energy saver for a gas-fired oil-fired boiler, which includes a smoke hood, a smoke return pipe, a smoke guide pipe, a purification box, etc., which effectively recovers the heat in the flue gas, avoids heat waste, and effectively saves energy. However, the above-mentioned flue gas recovery energy saver still has the following shortcomings: the combustion temperature of the gas-fired oil-fired boiler is high, and the concentration of nitrogen oxides generated during use is high. When the flue gas of the gas-fired oil-fired boiler is recycled, the nitrogen oxides need to be neutralized, but the existing flue gas recovery energy saver cannot effectively treat the nitrogen oxides in the flue gas, resulting in the gas discharged after the flue gas heat exchange polluting the environment.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0005] In view of the problems in the related technology, the utility model proposes a flue gas recovery economizer for a gas-fired or oil-fired boiler to overcome the above-mentioned technical problems existing in the existing related technology.

[0006] To this end, the specific technical solutions adopted by the utility model are as follows:

[0007] A flue gas recovery economizer for a gas-fired oil-fired boiler comprises a flue gas heat exchange box, one end of the flue gas heat exchange box is provided with a gas-fired oil-fired boiler connecting pipe, a heat exchange component is provided inside the flue gas heat exchange box and on the side of the gas-fired oil-fired boiler connecting pipe; a first partition and a second partition are provided in the middle of the flue gas heat exchange box, the first partition is connected to the inner top of the flue gas heat exchange box, the second partition is connected to the inner bottom of the flue gas heat exchange box, and a first outlet pipe is provided at one end of the flue gas heat exchange box away from the gas-fired oil-fired boiler connecting pipe; a neutralization component is provided at the top between the heat exchange component and the first partition, and a stirring mechanism is provided between the first partition and the second partition.

[0008] Furthermore, in order to further filter the flue gas and water after heat exchange and remove harmful substances and odors therein, an activated carbon filter is arranged at one end of the first outlet pipe away from the flue gas heat exchange box, and a second outlet pipe is arranged on the side wall of the activated carbon filter.

[0009] Furthermore, in order to effectively recover the heat in the flue gas and reduce energy waste, the heat exchange component includes a support plate arranged inside the flue gas heat exchange box and located on the side of the gas-fired oil boiler connecting pipe, a flue gas channel is arranged on the top of the support plate and close to one end of the gas-fired oil boiler connecting pipe, a water tank is arranged at one end of the flue gas channel close to the first partition and located at the top of the support plate, a water inlet pipe is arranged above the water tank, and the water tank is connected to the flue gas channel.

[0010] Furthermore, in order to add alkaline substances to the water for neutralization treatment and convert the acidic substances into substances with less impact on the environment or the boiler, the neutralization component includes a valve arranged at the top between the heat exchange component and the first partition, a mounting frame is arranged at the top of the valve, a through hole is arranged in the middle of the mounting frame, and an alkaline powder box is arranged at the top of the mounting frame; an outlet is arranged at the inner bottom of the alkaline powder box, and a pull-out plate is arranged above the outlet and inside the alkaline powder box.

[0011] Furthermore, in order to facilitate the removal of the alkaline powder box from the mounting frame, a plurality of connecting holes are provided at the bottom of the mounting frame, a plurality of connecting rods are provided at the bottom end of the alkaline powder box, and the bottom ends of the connecting rods pass through the top end of the mounting frame and extend into the corresponding connecting holes.

[0012] Furthermore, in order to make the neutralization reaction faster, the stirring mechanism includes a motor arranged at the top between the first partition and the second partition, and a stirring shaft is arranged at the bottom end of the output shaft of the motor and located in the flue gas heat exchange box.

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

[0014] (1) The gas-fired and oil-fired boiler flue gas recovery economizer of the present invention can effectively control and reduce pollutant emissions while improving energy efficiency, which is in line with the current trend of environmental protection and energy conservation.

[0015] (2) By setting up a heat exchange component, the heat in the flue gas can be effectively recovered through the inflowing water, thereby reducing energy waste and improving the overall energy efficiency of the boiler.

[0016] (3) By setting a neutralization component, after the nitrogen oxides in the flue gas react with water to produce acidic substances, the valve is set to a certain opening, so that the alkaline powder in the alkaline powder box can enter the flue gas heat exchange box at a preset flow rate. By adding alkaline substances to the water for neutralization, the acidic substances are converted into substances with less impact on the environment or the boiler; at the same time, through the design of connecting holes and connecting rods, the alkaline powder box can be easily removed from the mounting frame, and then the powder adhering to the alkaline powder box can be easily removed. By setting a stirring mechanism, the water in the flue gas heat exchange box can be stirred, making the neutralization reaction faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a flue gas recovery economizer for a gas-fired or oil-fired boiler according to an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0020] Figure 3 It is a schematic diagram of the internal structure of a flue gas recovery economizer for a gas-fired or oil-fired boiler according to an embodiment of the utility model;

[0021] Figure 4 It is a three-dimensional water inlet pipe assembly diagram of a mounting frame and an alkaline powder box in a gas-fired and oil-fired boiler flue gas recovery economizer according to an embodiment of the utility model;

[0022] Figure 5 It is a three-dimensional assembly diagram of a pull-out plate and an alkaline powder box in a flue gas recovery economizer for a gas-fired or oil-fired boiler according to an embodiment of the utility model.

[0023] In the figure:

[0024] 1. Flue gas heat exchange box; 2. Gas and oil boiler connecting pipe; 3. Heat exchange component; 301. Support plate; 302. Flue gas channel; 303. Water tank; 304. Water inlet pipe; 4. First partition; 5. Second partition; 6. First outlet pipe; 7. Neutralization component; 701. Valve; 702. Mounting frame; 703. Through hole; 704. Alkaline powder box; 705. Outlet; 706. Pull-out plate; 707. Connecting hole; 708. Connecting rod; 8. Stirring mechanism; 801. Motor; 802. Stirring shaft; 9. Activated carbon filter; 10. Second outlet pipe. DETAILED DESCRIPTION

[0025] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0026] According to an embodiment of the utility model, a flue gas recovery economizer for a gas-fired or oil-fired boiler is provided.

[0027] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-5 As shown, the flue gas recovery economizer for a gas-fired oil-fired boiler according to an embodiment of the utility model comprises a flue gas heat exchange box 1, a gas-fired oil-fired boiler connecting pipe 2 is arranged at one end of the flue gas heat exchange box 1, a heat exchange component 3 is arranged inside the flue gas heat exchange box 1 and on the side of the gas-fired oil-fired boiler connecting pipe 2; a first partition 4 and a second partition 5 are arranged in the middle of the flue gas heat exchange box 1, and the first partition 4 is connected to the inner top of the flue gas heat exchange box 1, and the second partition 5 is connected to the inner bottom of the flue gas heat exchange box 1, and a first outlet pipe 6 is arranged at one end of the flue gas heat exchange box 1 away from the gas-fired oil-fired boiler connecting pipe 2; a neutralization component 7 is arranged at the top between the heat exchange component 3 and the first partition 4, and a stirring mechanism 8 is arranged between the first partition 4 and the second partition 5.

[0028] With the aid of the above scheme, the gas and oil boiler flue gas recovery economizer of the utility model can effectively control and reduce pollutant emissions while improving energy efficiency, which is in line with the current trend of environmental protection and energy conservation.

[0029] In one embodiment, for the above-mentioned first outlet pipe 6, an activated carbon filter 9 is provided at one end of the first outlet pipe 6 away from the flue gas heat exchange box 1, and a second outlet pipe 10 is provided on the side wall of the activated carbon filter 9, so that the flue gas and water after heat exchange can be further filtered to remove harmful substances and odors therein, thereby ensuring that the discharged gas and water are cleaner.

[0030] In one embodiment, for the above-mentioned heat exchange component 3, the heat exchange component 3 includes a support plate 301 arranged inside the flue gas heat exchange box 1 and located on the side of the gas-fired oil boiler connecting pipe 2, a flue gas channel 302 is arranged on the top of the support plate 301 and close to one end of the gas-fired oil boiler connecting pipe 2, a water tank 303 is arranged on one end of the flue gas channel 302 close to the first partition plate 4 and located at the top of the support plate 301, a water inlet pipe 304 is arranged above the water tank 303, and the water tank 303 is connected to the flue gas channel 302, so as to effectively recover the heat in the flue gas through the inflowing water, reduce energy waste, and improve the overall energy efficiency of the boiler.

[0031] The working principle of the heat exchange component 3 is as follows: the flue gas enters the flue gas heat exchange box 1 through the gas-oil boiler connecting pipe 2 and passes through the flue gas channel 302, and water flows into the water tank 303 through the water inlet pipe 304, and the water tank 303 is connected to the flue gas channel 302. When the flue gas passes through the flue gas channel 302, the heat will be transferred to the water in the water tank 303, thereby realizing heat recovery.

[0032] In one embodiment, for the neutralization component 7, the neutralization component 7 includes a valve 701 disposed at the top between the heat exchange component 3 and the first partition plate 4, a mounting frame 702 is disposed at the top of the valve 701, a through hole 703 is disposed in the middle of the mounting frame 702, and an alkaline powder box 704 is disposed at the top of the mounting frame 702; an outlet 705 is disposed at the inner bottom of the alkaline powder box 704, and a pull-out plate 706 is disposed above the outlet 705 and located in the alkaline powder box 704. At the same time, in the specific design, the alkaline powder box 70 The inner bottom of the mounting frame 702 is set as a conical structure, which can promote the alkaline powder to enter the outlet 705; the bottom of the mounting frame 702 is provided with a plurality of connecting holes 707, and the bottom end of the alkaline powder box 704 is provided with a plurality of connecting rods 708, and the bottom end of the connecting rod 708 passes through the top of the mounting frame 702 and extends into the corresponding connecting hole 707, so that after the nitrogen oxides in the flue gas and water produce acidic substances, the valve 701 is set to a certain opening, so that the alkaline powder in the alkaline powder box 704 can enter the flue gas heat exchange box 1 according to the preset flow rate. By adding alkaline substances to the water for neutralization treatment, the acidic substances are converted into substances with less impact on the environment or the boiler; at the same time, through the design of the connecting holes 707 and the connecting rods 708, the alkaline powder box 704 can be easily removed from the mounting frame 702, and then the powder adhering in the alkaline powder box 704 can be easily removed.

[0033] The working principle of the neutralization assembly 7 is as follows: a certain amount of alkaline powder is arranged above the pull-out plate 706. After the pull-out plate 706 is pulled out of the alkaline powder box 704, the alkaline powder can drop into the through hole 703 and flow to the valve 701. When the nitrogen oxides in the flue gas react with water to produce acidic substances, the alkaline powder entering the water through the valve 701 neutralizes the acidic substances. After the pull-out plate 706 is inserted into the alkaline powder box 704, the space above the pull-out plate 706 can store the alkaline powder. If it is not used for a long time, a matching box cover (not shown in the figure) can be set on the alkaline powder box 704. When the alkaline powder box 704 needs to be removed, it is only necessary to lift the alkaline powder box 704 so that the connecting rod 708 leaves the connecting hole 707 and the mounting frame 702, and the alkaline powder box 704 can be separated from the mounting frame 702.

[0034] In one embodiment, for the above-mentioned stirring mechanism 8, the stirring mechanism 8 includes a motor 801 arranged at the top between the first partition 4 and the second partition 5, and a stirring shaft 802 is arranged at the bottom end of the output shaft of the motor 801 and located inside the flue gas heat exchange box 1, so that the water in the flue gas heat exchange box 1 can be stirred to make the neutralization reaction faster.

[0035] The working principle of the stirring mechanism 8 is as follows: the motor 801 is started through an externally connected control panel, the motor 801 drives the stirring shaft 802 to rotate, and the stirring shaft 802 stirs the water in the flue gas heat exchange box 1 .

[0036] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0037] In actual application, the flue gas enters the flue gas heat exchange box 1 through the gas-fired oil boiler connecting pipe 2, and heat is recovered through the heat exchange component 3. The neutralization component 7 reacts with the acidic substances in the water by adding alkaline powder to achieve neutralization. The stirring mechanism 8 stirs the water to promote heat exchange and neutralization reaction. The treated flue gas and water flow to the activated carbon filter 9 through the first outlet pipe 6 to further remove harmful substances and odors. The purified flue gas and water are discharged through the second outlet pipe 10.

[0038] In addition, the gas-fired and oil-fired boiler flue gas recovery economizer of the utility model can not only recover the flue gas heat of the gas-fired and oil-fired boiler, but also recover the flue gas waste heat of any device that generates high-temperature flue gas. In specific applications, dry and wet methods can be used according to the specific situation, and whether to enable the neutralization component 7 can be used.

[0039] In summary, the gas-fired oil-fired boiler flue gas recovery energy saver of the utility model can effectively control and reduce pollutant emissions while improving energy efficiency, which is in line with the current trend of environmental protection and energy saving. By setting the heat exchange component 3, the heat in the flue gas can be effectively recovered through the inflowing water, reducing energy waste and improving the overall energy efficiency of the boiler. By setting the neutralization component 7, after the nitrogen oxides in the flue gas and water produce acidic substances, the valve 701 is set to a certain opening, so that the alkaline powder in the alkaline powder box 704 can enter the flue gas heat exchange box 1 according to a preset flow rate. By adding alkaline substances to the water for neutralization treatment, the acidic substances are converted into substances with less impact on the environment or the boiler; at the same time, through the design of the connecting hole 707 and the connecting rod 708, the alkaline powder box 704 can be easily removed from the mounting frame 702, and then the powder adhering in the alkaline powder box 704 can be easily removed. By setting the stirring mechanism 8, the water in the flue gas heat exchange box 1 can be stirred, so that the neutralization reaction is faster.

[0040] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flue gas recovery economizer for a gas or oil-fired boiler, comprising a flue gas heat exchange box (1), characterized in that: A gas-fired oil boiler connecting pipe (2) is arranged at one end of the flue gas heat exchange box (1), and a heat exchange component (3) is arranged inside the flue gas heat exchange box (1) and on the side of the gas-fired oil boiler connecting pipe (2); A first partition (4) and a second partition (5) are provided in the middle of the flue gas heat exchange box (1), and the first partition (4) is connected to the inner top of the flue gas heat exchange box (1), and the second partition (5) is connected to the inner bottom of the flue gas heat exchange box (1). A first outlet pipe (6) is provided at one end of the flue gas heat exchange box (1) away from the gas-fired oil boiler connecting pipe (2); A neutralization component (7) is provided at the top end between the heat exchange component (3) and the first partition (4), and a stirring mechanism (8) is provided between the first partition (4) and the second partition (5).

2. A gas-fired and oil-fired boiler flue gas recovery economizer according to claim 1, characterized in that: An activated carbon filter (9) is arranged at one end of the first outlet pipe (6) away from the flue gas heat exchange box (1), and a second outlet pipe (10) is arranged on the side wall of the activated carbon filter (9).

3. A flue gas recovery economizer for gas and oil-fired boilers according to claim 1 or 2, characterized in that: The heat exchange component (3) comprises a support plate (301) arranged inside the flue gas heat exchange box (1) and located on the side of the gas-fired oil boiler connecting pipe (2); a flue gas channel (302) is arranged on the top of the support plate (301) and close to one end of the gas-fired oil boiler connecting pipe (2); a water tank (303) is arranged on the flue gas channel (302) close to one end of the first partition plate (4) and located on the top of the support plate (301); a water inlet pipe (304) is arranged above the water tank (303), and the water tank (303) is connected to the flue gas channel (302).

4. A flue gas recovery economizer for gas and oil-fired boilers according to claim 3, characterized in that: The neutralization component (7) comprises a valve (701) arranged at the top between the heat exchange component (3) and the first partition (4), a mounting frame (702) is arranged at the top of the valve (701), a through hole (703) is arranged in the middle of the mounting frame (702), and an alkaline powder box (704) is arranged at the top of the mounting frame (702).

5. A flue gas recovery economizer for gas and oil-fired boilers according to claim 4, characterized in that: An outlet (705) is provided at the inner bottom of the alkaline powder box (704), and a pull-out plate (706) is provided above the outlet (705) and inside the alkaline powder box (704).

6. A flue gas recovery economizer for gas and oil-fired boilers according to claim 5, characterized in that: The bottom of the mounting frame (702) is provided with a plurality of connection holes (707), the bottom end of the alkaline powder box (704) is provided with a plurality of connection rods (708), and the bottom ends of the connection rods (708) pass through the top end of the mounting frame (702) and extend into the corresponding connection holes (707).

7. A flue gas recovery economizer for gas and oil-fired boilers according to claim 1, characterized in that: The stirring mechanism (8) comprises a motor (801) arranged at the top between the first partition (4) and the second partition (5), and a stirring shaft (802) is arranged at the bottom end of the output shaft of the motor (801) and located inside the flue gas heat exchange box (1).

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