CN212961495U

CN212961495U - Water circulation system for boiler

Info

Publication number: CN212961495U
Application number: CN202021780950.8U
Authority: CN
Inventors: 廖洪; 刘鑫; 刘全寿; 杨琴娜; 白璐
Original assignee: Qinghai Huatong Boiler Manufacturing Co ltd
Current assignee: Qinghai Huatong Boiler Manufacturing Co ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-04-13
Anticipated expiration: 2030-08-24

Abstract

The utility model relates to a gas boiler technical field, concretely relates to water circulating system for boiler, the induction cooker comprises a cooker bod, including first return pipe, second return pipe, preceding smoke box and back smoke box in the furnace body, just back smoke box is through connecting pipe fitting and processing jar intercommunication, the outside of preceding smoke box and back smoke box is provided with first cooling jacket and second cooling jacket respectively, the inside of processing jar is provided with the heat recovery room. And the first cooling jacket, the second cooling jacket and the heat recovery chamber are internally provided with cooling water for respectively recovering heat of the front smoke box, the rear smoke box and the smoke containing waste heat so as to improve the utilization rate of the heat.

Description

Water circulation system for boiler

Technical Field

The utility model relates to a gas boiler technical field especially relates to a water circulating system for boiler.

Background

The boiler is an energy conversion device, the energy input to the boiler comprises chemical energy and electric energy in fuel, the boiler outputs steam, high-temperature water or an organic heat carrier with certain heat energy, the origin of the boiler refers to a water container heated on fire, the boiler refers to a place where the fuel is combusted, the boiler comprises a boiler and a furnace, the hot water or the steam generated in the boiler can directly provide the heat energy required by industrial production and people life, and can also be converted into mechanical energy through a steam power device, or the mechanical energy is converted into the electric energy through a generator.

The boiler in the prior art generally only circulates water in a heating cavity of the boiler, so that the heat utilization rate is not high, and the heating efficiency is low. In the use of horizontal boiler, the high temperature flue gas still can lead to the smoke box to take place the fracture phenomenon because of lasting high temperature to the scouring action of smoke box, and does not carry out the retrieval and utilization to the heat of smoke box transmission for whole thermal efficiency is not high.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide a water circulating system for boiler, water circulating system for boiler can effectively utilize the heat in smoke box bottom plate and the surplus tail gas, can effectively improve the thermal efficiency of this boiler.

In order to achieve the technical effects, the utility model adopts the following technical scheme:

a water circulation system for a boiler comprises a boiler body, wherein a hearth is arranged in the boiler body, the hearth is communicated with a front smoke box through a first return pipe, the front smoke box is communicated with a rear smoke box through a second return pipe, the rear smoke box is communicated with a treatment tank through a connecting pipe fitting, the outer parts of the front smoke box and the rear smoke box are respectively provided with a first cooling jacket and a second cooling jacket, the first cooling jacket is provided with a first water inlet pipe and a first water outlet pipe, the second cooling jacket is provided with a second water inlet pipe and a second water outlet pipe, the first water outlet pipe and the second water outlet pipe are both communicated with the boiler body, the boiler body is provided with a third water inlet pipe and a steam outlet, the treatment tank is provided with a fourth water inlet pipe and a fourth water outlet pipe, and the first water inlet pipe, the second water inlet pipe, the third water inlet pipe and the fourth water inlet pipe are all provided with flow regulating valves, the furnace body is internally provided with a liquid level sensor, the outside of the furnace body is also provided with a controller, and the liquid level sensor and the flow regulating valve are electrically connected with the controller.

Further, the treatment tank comprises a tank body, an air inlet is formed in the bottom of the tank body, an air outlet is formed in the top of the tank body, a heat recovery chamber is arranged in the middle of the tank body, a plurality of airflow pipelines are arranged in the heat recovery chamber and used for communicating the air inlet with the air outlet, and a fourth water inlet pipe and a fourth water outlet pipe are arranged on the side wall of the heat recovery chamber.

Further, the airflow duct is helical within the heat recovery chamber.

Further, the fourth water inlet pipe is positioned below the fourth water outlet pipe.

Furthermore, the first water inlet pipe, the second water inlet pipe, the third water inlet pipe and the fourth water inlet pipe are all connected with a water inlet main pipe, and an electronic water treatment device is arranged on the water inlet main pipe.

Compared with the prior art, the beneficial effects of the utility model are that:

on the one hand, the utility model provides a pair of water circulating system for boiler retrieves the heat on the bottom plate of preceding smoke box and back smoke box through setting up first cooling jacket and second cooling jacket, and will in the rethread furnace body behind the water heating in first cooling jacket and the second cooling jacket, can improve the initial temperature of furnace body to the production of vapor improves heating efficiency with higher speed, simultaneously, effectively reduces the bottom plate temperature of preceding smoke box and back smoke box, with the fracture risk that reduces the bottom plate, improves the life of smoke box, guarantees the normal operating of boiler.

On the other hand, the utility model provides a pair of water circulating system for boiler is through setting up the flue gas waste heat utilization of treatment tank to discharge furnace body to through setting up a plurality of spiral helicine air flow pipeline improvement treatment effeciency and the flue gas dwell time of handling the tank, then will handle the water after the indoor heating of heat recovery and let in the furnace body, can improve the initial temperature of furnace body, in order to accelerate the production of vapor, improve steam production efficiency.

Drawings

Fig. 1 is a schematic view of an overall structure of a water circulation system for a boiler according to an embodiment of the present invention;

fig. 2 is a schematic view of an overall structure of a treatment tank of a water circulation system for a boiler according to an embodiment of the present invention;

FIG. 3 is a sectional view of a treatment tank of a water circulation system for a boiler according to an embodiment of the present invention;

the reference signs are: 10-a combustor, 20-a furnace body, 20 a-a third water inlet pipe, 20 b-a steam outlet, 20 c-a flow regulating valve, 21-a hearth, 211-a first return pipe, 212-a second return pipe, 31-a front smoke box, 311-a first cooling jacket, 311 a-a first water inlet pipe, 311 b-a first water outlet pipe, 32-a rear smoke box, 321-a second cooling jacket, 321 a-a second water inlet pipe, 312 b-a second water outlet pipe, 33-a connecting pipe, 40-a treatment tank, 40 a-a fourth water inlet pipe, 40 b-a fourth water outlet pipe, 41-an air inlet, 42-an air outlet, 43 a-a first partition plate, 43 b-a second partition plate and 44-an airflow pipeline.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1-3, the water circulation system for a boiler provided by this embodiment includes a furnace body 20, a furnace 21 is provided in the furnace body 20, the furnace 21 is used for supplying fuel to combust and generate flue gas, a burner 10 is provided at one end of the furnace 21, a combustion chamber is communicated with a front smoke box 31 through a plurality of first return pipes 211, the front smoke box 31 is communicated with a rear smoke box 32 through a plurality of second return pipes 212, and the rear smoke box 32 is provided with an air outlet which is communicated with a treatment tank 40 through a connecting pipe 33. High-temperature flue gas generated after fuel combustion in the furnace 21 enters the front smoke box 31 through the first return pipe 211, high-temperature flue gas in the front smoke box 31 enters the rear smoke box 32 through the second return pipe 212, and the high-temperature flue gas is heated with water in the furnace body 20 in the process of passing through the first return pipe 211 and the second return pipe 212 to generate whole steam. The high temperature flue gas, which is heat-exchanged in the first and

second return pipes

211 and 212, is heat-recovered again in the treatment tank 40 through the connection pipe 33 before being discharged, to improve the thermal efficiency of the boiler.

In this embodiment, the front smoke box 31 and the rear smoke box 32 are respectively provided with a first cooling jacket 311 and a second cooling jacket 321 on the outside, and the bottom plates of the front smoke box 31 and the rear smoke box 32 are embedded in the first cooling jacket 311 and the second cooling jacket 321. The first cooling jacket 311 is provided with a first water inlet pipe 311a and a first water outlet pipe 311b, and the second cooling jacket 321 is provided with a second water inlet pipe 321a and a second water outlet pipe 312 b. The first water inlet pipe 311a and the second water inlet pipe 321a are both communicated with a water inlet main pipe, and the first water inlet pipe 311a and the second water inlet pipe 321a are both provided with a flow regulating valve 20 c. The first water outlet pipe 311b and the second water outlet pipe 312b are both communicated with the furnace body 20. When the boiler works, the heat on the bottom plates of the front smoke box 31 and the rear smoke box 32 can be recovered through the first cooling jacket 311 and the second cooling jacket 321, so that the temperature of the bottom plates of the front smoke box 31 and the rear smoke box 32 is reduced, the service lives of the front smoke box 31 and the rear smoke box 32 are prolonged, and meanwhile, the front smoke box 31 and the rear smoke box 32 can be used as stable heat sources to heat water in the first cooling jacket 311 and the second cooling jacket 321, so that the heat utilization rate of the boiler can be effectively improved.

In this embodiment, the treatment tank 40 includes a tank body, the bottom of the tank body is provided with air inlet 41, the top of the tank body is provided with gas vent 42, air inlet 41 communicates with back smoke box 32 through connecting pipe 33, the outside of connecting pipe 33 is provided with the heat preservation to reduce the loss of flue gas in transportation process. The middle part of the tank body is provided with a heat recovery chamber, the lower part of the heat recovery chamber is provided with a first partition plate 43a, the upper part of the heat recovery chamber is provided with a second partition plate 43b, and a cavity between the first partition plate 43a and the second partition plate 43b forms the heat recovery chamber. The tank body is provided with a fourth water inlet pipe 40a and a fourth water outlet pipe 40b, the fourth water inlet pipe 40a is communicated with the water inlet main pipe, and the fourth water inlet pipe 40a is positioned below the fourth water outlet pipe 40 b. The fourth water inlet pipe 40a and the fourth water outlet pipe 40b both penetrate through the side wall of the heat recovery chamber and are communicated with the heat recovery chamber, a flow regulating valve 20c is arranged on the fourth water inlet pipe 40a, and the flow regulating valve 20c is electrically connected with the controller. The inside of heat recovery room is provided with a plurality of air flow pipeline 44 and is used for the intercommunication air inlet 41 and gas vent 42, air flow pipeline 44 is the heliciform in heat recovery is indoor, just air flow pipeline 44 is in evenly arrange in the heat recovery room, be convenient for increase flue gas dwell time in the heat recovery room. When the boiler is used, cooling water is introduced into the fourth water inlet, high-temperature flue gas flows through the heat recovery chamber through the airflow pipeline 44, and the cooling water exchanges heat with the flue gas through the airflow pipeline 44, so that residual heat of the flue gas is recovered conveniently.

In this embodiment, the furnace body 20 is provided with a third water inlet pipe 20a and a steam outlet 20b, when in operation, cooling water is introduced into the furnace body 20 through the third water inlet pipe 20a, the cooling water exchanges heat with high-temperature flue gas through the first return pipe 211 and the second return pipe 212 to heat up the high-temperature flue gas to form water vapor, and the water vapor is discharged through the steam outlet 20 b. A liquid level sensor is arranged in the furnace body 20, the liquid level sensor is a floating ball type liquid level sensor, a flow regulating valve 20c is arranged on the third water inlet pipe 20a, and the liquid level sensor and the flow regulating valve 20c are electrically connected with the controller.

In this embodiment, the water inlet main pipe is provided with an electronic water treatment device and a main valve, and the electronic water treatment device can effectively prevent each component from scaling.

In this embodiment, temperature sensors are disposed inside the first water outlet pipe 311b, the second water outlet pipe 312b and the fourth water outlet pipe 40b, and the temperature sensors are electrically connected to the controller. The temperature sensors can monitor the temperature of the water in the first water outlet pipe 311b, the second water outlet pipe 312b and the fourth water outlet pipe 40b in real time, and transmit the monitoring data to the controller.

The utility model provides a pair of water circulation system for boiler is at the during operation, through opening electron water treatment ware and the main valve on the inlet manifold, then open each flow control valve 20c through the controller, to first cooling jacket 311, second cooling jacket 321, furnace body 20 and the indoor cooling water that lets in of heat recovery, the flue gas can heat the cooling water in order to produce vapor at the in-process of the indoor circulation of furnace body 20 and heat recovery, and this floater formula level sensor can detect the water yield in the furnace body 20, and temperature sensor detects the temperature in first outlet pipe 311b, second outlet pipe 312b and fourth outlet pipe 40b, and will detect data transmission to controller, the controller can adjust each flow control valve 20c according to above-mentioned detection data for the water yield in the furnace body 20 is invariable relatively, and effectively to preceding smoke box 31, The heat in the rear smoke box 32 and the heat recovery chamber is recovered.

Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will understand that the present invention can be modified or replaced with other embodiments without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims. The technology, shape and construction parts which are not described in detail in the present invention are all known technology.

Claims

1. A water circulation system for a boiler is characterized in that: comprises a furnace body (20), a furnace chamber (21) is arranged in the furnace body (20), the furnace chamber (21) is communicated with a front smoke box (31) through a first return pipe (211), the front smoke box (31) is communicated with a rear smoke box (32) through a second return pipe (212), the rear smoke box (32) is communicated with a treatment tank (40) through a connecting pipe (33), a first cooling jacket (311) and a second cooling jacket (321) are respectively arranged outside the front smoke box (31) and the rear smoke box (32), the first cooling jacket (311) is provided with a first water inlet pipe (311a) and a first water outlet pipe (311b), the second cooling jacket (321) is provided with a second water inlet pipe (321a) and a second water outlet pipe (312b), the first water outlet pipe (311b) and the second water outlet pipe (312b) are both communicated with the furnace body (20), the furnace body (20) is provided with a third water inlet pipe (20a) and a steam outlet (20b), be provided with fourth inlet tube (40a) and fourth outlet pipe (40b) on processing jar (40), the inside of furnace body (20) is provided with level sensor, all be provided with flow control valve (20c) on first inlet tube (311a), second inlet tube (321a), third inlet tube (20a) and fourth inlet tube (40a), the outside of furnace body (20) still is provided with the controller, level sensor, flow control valve (20c) all with the controller electricity is connected.

2. A water circulation system for a boiler as claimed in claim 1, wherein: the treatment tank (40) comprises a tank body, the bottom of the tank body is provided with an air inlet (41), the top of the tank body is provided with an air outlet (42), the middle of the tank body is provided with a heat recovery chamber, a plurality of air flow pipelines (44) are arranged in the heat recovery chamber and used for communicating the air inlet (41) with the air outlet (42), and a fourth water inlet pipe (40a) and a fourth water outlet pipe (40b) are arranged on the side wall of the heat recovery chamber.

3. A water circulation system for a boiler as claimed in claim 2, wherein: the air flow duct (44) is helical within the heat recovery chamber.

4. A water circulation system for a boiler as claimed in claim 1, wherein: the fourth water inlet pipe (40a) is positioned below the fourth water outlet pipe (40 b).

5. A water circulation system for a boiler as claimed in claim 1, wherein: the first water inlet pipe (311a), the second water inlet pipe (321a), the third water inlet pipe (20a) and the fourth water inlet pipe (40a) are all connected with a water inlet main pipe, and an electronic water treatment device is arranged on the water inlet main pipe.