Boiler with energy-saving device

Abstract

The utility model relates to the technical field of boilers, and discloses a boiler with an energy-saving device, which comprises a boiler main body, an economizer, a first induced draft fan and a chimney which are sequentially connected, the output end of the economizer is connected with the first induced draft fan through the energy-saving device, a first heat exchange pipeline is arranged in the energy-saving device, and a second heat exchange pipeline is arranged in the chimney. The two ends of the first heat exchange pipeline are connected with a water tank, a first water suction pump is installed at one end of the first heat exchange pipeline, waste smoke generated by the boiler body can be sucked, the waste smoke sequentially penetrates through the economizer and the energy saver, and when the smoke passes through the energy saver, water in the water tank is sucked into the first heat exchange pipeline through the arranged first water suction pump; water in the first heat exchange pipeline absorbs heat of waste smoke in the energy saver and then is conveyed into the water tank again, heat recovery is achieved, and energy conservation and environment protection are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler technical field especially relates to a boiler with energy -conserving device. BACKGROUND

[0002] The traditional boiler system, when the boiler fuel burns, after the heat absorption of the boiler and the coal economizer, the flue gas temperature of the coal economizer outlet is about 170 DEG C and is directly discharged through the chimney, and the efficiency of the boiler system is about 84%, the boiler efficiency is low, and the energy consumption is wasted.

[0003] In the prior art, the temperature of the waste flue gas when being discharged is still as high as 170 DEG C, and has great heat energy, and at present, the heat energy cannot be utilized, and energy is wasted. SUMMARY

[0004] The utility model discloses a boiler with energy -conserving device to solve the prior art technical problems.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A boiler with energy -conserving device, including the boiler main body, the coal economizer, the first induced draft fan and the chimney that connect gradually, the output of the coal economizer is connected through the energy -conserving device and the first induced draft fan, the first heat exchange pipeline is installed in the energy -conserving device, and the both ends of the first heat exchange pipeline are connected with the water tank, and the first water pump is installed on one end thereof.

[0007] Preferably, the second heat exchange pipeline is arranged in the coal economizer, the second water pump is installed on one side of the water tank, the second water pump is communicated with one end of the second heat exchange pipeline through the connecting pipe, and the other end of the second heat exchange pipeline is communicated with the boiler main body.

[0008] Preferably, the first heat exchange pipeline and the second heat exchange pipeline are both arranged in the form of a serpentine pipe.

[0009] Preferably, the water softening treatment device is arranged on one side of the water tank and communicated with the water tank.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] The utility model discloses the first induced draft fan can suck the waste flue gas generated by the boiler main body, and the waste flue gas passes through the coal economizer and the energy -conserving device in turn, the first water pump is arranged, and when the flue gas passes through the energy -conserving device, the water in the water tank is pumped into the first heat exchange pipeline, the water in the first heat exchange pipeline absorbs the heat of the waste flue gas in the energy -conserving device, and then is transported into the water tank, so that heat recovery is realized, and energy saving and environmental protection are realized. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The utility model provides a system composition schematic drawing of a boiler with energy saving device.

[0013] In the figure: 1, furnace body; 2, coal economizer; 3, first induced draft fan; 4, chimney; 5, energy saving device; 6, first heat exchange pipeline; 7, water tank; 8, first water pump; 9, second heat exchange pipeline; 10, second water pump; 11, water softening treatment device; 12, grate; 13, fuel feeding pipe; 14, flue gas outlet. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0015] Reference Figure 1 A boiler with energy saving device, including the boiler main body, coal economizer 2, first induced draft fan 3 and chimney 4 that connect in proper order, the output of coal economizer 2 is connected through energy saving device 5 and the input of first induced draft fan 3, first heat exchange pipeline 6 is installed in energy saving device 5, and the both ends of first heat exchange pipeline 6 are connected with water tank 7, and first water pump 8 is installed on one end thereof;

[0016] Second heat exchange pipeline 9 is arranged in coal economizer 2, second water pump 10 is installed on one side of water tank 7, and second water pump 10 is communicated with one end of second heat exchange pipeline 9 through connecting pipe, and the other end of second heat exchange pipeline 9 is communicated with the boiler main body;

[0017] When the device is used, the first induced draft fan 3 arranged can suck the waste flue gas generated by the boiler main body, and the waste flue gas passes through the coal economizer 2 and the energy saving device 5 in turn, the first water pump 8 arranged is used to pump the water in the water tank 7 into the first heat exchange pipeline 6 when the flue gas passes through the energy saving device 5, so that the water in the first heat exchange pipeline 6 absorbs the heat of the waste flue gas in the energy saving device 5, and then is retransmitted into the water tank 7 to complete the first step of heat recovery, and the second water pump 10 arranged can pump the water absorbing heat in the water tank 7 into the second heat exchange pipeline 9 to absorb the heat of the waste flue gas in the coal economizer 2, and then the other end of the second heat exchange pipeline 9 is used to let the water absorbing heat be discharged into the boiler main body, and finally steam is generated for production.

[0018] The economizer 2 and the energy-saving device 5 are both box-shaped, the first heat exchange pipeline 6 and the second heat exchange pipeline 9 are installed in the corresponding box, the flue gas flows outside the first heat exchange pipeline 6 and the second heat exchange pipeline 9 through the box, and the heat exchange between the flue gas and the water in the first heat exchange pipeline 6 and the second heat exchange pipeline 9 is realized through the pipe wall of the first heat exchange pipeline 6 and the second heat exchange pipeline 9 to preheat the water.

[0019] The boiler body comprises a furnace body 1, a grate 12 located at the bottom of the furnace body 1, a fuel feeding pipe 13 obliquely arranged at one side of the grate 12 and in communication with the inner cavity of the grate 12, and a first flue gas outlet 14 opened at one side of the furnace body 1, the first flue gas outlet 14 is in communication with the input end of the economizer 2 through a pipeline, and the output end of the economizer 2 is in communication with the first induced draft fan 3 through a pipeline.

[0020] Further, the first heat exchange pipeline 6 and the second heat exchange pipeline 9 are both in the form of a serpentine pipe, and the material of the first heat exchange pipeline 6 and the second heat exchange pipeline 9 is a heat-conducting material (for example, aluminum brass), which increases the heat absorption effect of the water in the first heat exchange pipeline 6 and the second heat exchange pipeline 9, and by making the first heat exchange pipeline 6 and the second heat exchange pipeline 9 both in the form of a serpentine pipe, the heat exchange area of the flue gas in the energy-saving device 5 and the economizer 2 can be increased, the residence time of the water in the energy-saving device 5 and the economizer 2 can be increased, and the heat exchange effect can be improved.

[0021] Further, the water tank 7 is provided with a water softening treatment device 11 at one side, the water softening treatment device 11 is in communication with the water tank 7, and the raw water is stored in the water tank 7 after being softened by the water softening treatment device 11.

[0022] The water softening treatment device 11 can adopt an ion exchanger, one end of which inputs water, and the other end of which outputs to the water tank 7, so as to remove calcium and magnesium ions in the water through the ion exchanger to reduce the hardness of the water, and the water softening treatment device 11 is a prior art which will not be described in detail here.

[0023] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A boiler with energy saving device, comprising a boiler body, an economizer (2), a first induced draft fan (3) and a chimney (4) connected in sequence, characterized in that: The output end of the economizer (2) is connected with the input end of the economizer (5) and the first induced draft fan (3), the first heat exchange pipeline (6) is arranged in the economizer (5), the water tank (7) is connected with the two ends of the first heat exchange pipeline (6), and the first water pump (8) is arranged on one end of the first heat exchange pipeline (6).

2. A boiler with energy saving device as claimed in claim 1 wherein: The second heat exchange pipeline (9) is arranged in the economizer (2), the second water pump (10) is arranged on one side of the water tank (7), the second water pump (10) is communicated with one end of the second heat exchange pipeline (9) through a connecting pipe, and the other end of the second heat exchange pipeline (9) is communicated with the boiler body.

3. A boiler with energy saving device as claimed in claim 2 wherein: The first heat exchange pipeline (6) and the second heat exchange pipeline (9) are both arranged in the shape of a serpentine pipe.

4. The boiler with energy saving device according to claim 1, characterized in that The water softening treatment device (11) is arranged on one side of the water tank (7) and communicated with the water tank (7), and the boiler raw water is stored in the water tank (7) after being softened by the water softening treatment device (11).

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