CN210568348U

CN210568348U - Steam boiler with flue gas waste heat recovery function

Info

Publication number: CN210568348U
Application number: CN201921170120.0U
Authority: CN
Inventors: 黄良斐; 江友达; 陈东; 李晓飞; 周文波; 陈晋彪; 吴建奇; 罗旭奇
Original assignee: Guangdong Meizhou Tobacco Redrying Co ltd
Current assignee: Guangdong Meizhou Tobacco Redrying Co ltd
Priority date: 2019-07-24
Filing date: 2019-07-24
Publication date: 2020-05-19
Anticipated expiration: 2029-07-24

Abstract

The utility model discloses a steam boiler with the function of recovering the waste heat of flue gas; belonging to the technical field of steam boilers; the technical key points of the device comprise a steam boiler, a steam sub-cylinder and a filter which are respectively connected with the steam boiler through pipelines, wherein a deoxidizing box is arranged on the pipeline between the filter and the steam boiler, tap water sequentially passes through the filter and the deoxidizing box to enter the steam boiler, a chimney is arranged at a smoke outlet of the steam boiler, and an exchange type waste heat recovery device is connected to the chimney; the water inlet of the exchange type waste heat recovery device is connected with the water outlet pipeline of the filter, the water outlet of the exchange type waste heat recovery device is connected with the water inlet pipeline of the deaerating tank, and a water pump is arranged on the pipeline connected with the water outlet of the filter; the utility model aims to provide a steam boiler with the function of recovering the waste heat of the flue gas, which has good use effect and saves energy consumption; for preheating boiler water.

Description

Steam boiler with flue gas waste heat recovery function

Technical Field

The utility model relates to a steam boiler, more specifically say, especially relate to a steam boiler with flue gas waste heat recovery function.

Background

In industrial production, many industries need to use steam boilers, which can be classified into coal-fired boilers, oil-fired boilers, gas-fired boilers and the like according to the types of fuels and energy. In order to save the consumption of natural gas in the use of natural gas boilers in the same industry and the same type, the commonly used method is as follows: the water temperature of the boiler water is preheated. Before entering the boiler, the boiler water needs to be filled with normal-temperature tap water into a deoxidizing tank for deoxidizing the liquid medicine, and then the normal-temperature tap water is pumped into the boiler for use. Water is directly heated from the normal temperature to produce high-temperature steam and a large amount of fuel is needed to be used, a steam pipeline is connected to the deaerator tank on the steam cylinder of the existing boiler, the high-temperature steam produced by the boiler is directly poured into the water, and the purpose of preheating the water for the boiler is achieved.

The natural gas boiler directly discharges high-temperature waste gas to the atmosphere through the chimney when the operation produces high-temperature steam and supplies production use, does not possess the economizer like original coal fired boiler, causes very big energy waste, is not conform to sustainable development, and it is comparatively inconvenient to use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steam boiler with flue gas waste heat recovery function that excellent in use effect, energy saving consumed to the not enough of above-mentioned prior art.

The technical scheme of the utility model is realized like this: a steam boiler with a flue gas waste heat recovery function comprises a steam boiler, a steam sub-cylinder and a filter, wherein the steam sub-cylinder and the filter are respectively connected with the steam boiler through pipelines; the water inlet of the exchange type waste heat recovery device is connected with the water outlet pipeline of the filter, the water outlet of the exchange type waste heat recovery device is connected with the water inlet pipeline of the deaerating tank, and the pipeline connected with the water outlet of the filter is provided with a water pump.

In the steam boiler with the function of recovering the waste heat of the flue gas, the chimney is Z-shaped and consists of a first L-shaped chimney section and a second L-shaped chimney section which are matched with each other; the vertical part of the first L-shaped chimney section faces downwards to be connected with a steam boiler, the vertical part of the second L-shaped chimney section faces upwards, and the exchange type waste heat recovery device is connected between the horizontal parts of the first L-shaped chimney section and the second L-shaped chimney section.

In the steam boiler with the function of recovering the waste heat of the flue gas, the heat-insulating layer is arranged on the periphery of the first L-shaped chimney section, and the heat-insulating layer sequentially wraps the aluminum silicate fiber felt, the wire netting and the jacket on the surface of the first L-shaped chimney section from inside to outside.

In the steam boiler with the flue gas waste heat recovery function, the exchange type waste heat recovery device comprises a heat exchange cylinder connected between chimneys through flanges, and a plurality of finned tubes penetrate through the heat exchange cylinder along the horizontal direction; the finned tubes are positioned in the heat exchange cylinder, the turning positions are positioned outside the heat exchange cylinder, and the peripheries of the finned tubes positioned outside the heat exchange cylinder are provided with heat-insulating covers which are fixedly connected with the heat exchange cylinder; the water inlet of the finned tube is connected with the water outlet pipeline of the filter, and the water outlet of the finned tube is connected with the water inlet pipeline of the deaerating box.

In the steam boiler with the function of recovering the waste heat of the flue gas, the plurality of flow baffle plates are respectively arranged at the top and the inner bottom of the heat exchange barrel at intervals along the horizontal direction, the flow baffle plates are matched to form an S-shaped flue gas channel, and the finned tubes are mutually communicated and arranged in the S-shaped flue gas channel.

After the above structure is adopted in the utility model, through the exchange formula waste heat recovery device who sets up, introduce the exchange formula waste heat recovery device with the high temperature flue gas, utilize the high temperature flue gas to preheat boiler water, reach the effect of energy saving consumption, solved the extravagant problem of the energy, excellent in use effect.

Meanwhile, the flow blocking plates are arranged to be matched with each other to form an S-shaped flue gas channel, so that the speed of high-temperature flue gas passing through the exchange type waste heat recovery device can be delayed, the utilization rate of the high-temperature flue gas is improved, the heat exchange effect is ensured, and the energy waste is reduced.

Drawings

The present invention will be described in further detail with reference to the following examples, which are not intended to limit the invention.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the exchange type waste heat recovery device of the present invention.

3 FIG. 3 3 3 is 3 a 3 schematic 3 sectional 3 view 3 in 3 the 3 direction 3 A 3- 3 A 3. 3

In the figure: the device comprises a steam boiler 1, a steam cylinder 2, a filter 3, an oxygen removal box 4, a chimney 5, a first L-shaped chimney section 5a, a second L-shaped chimney section 5b, a heat preservation layer 5c, an exchange type waste heat recovery device 6, a heat exchange cylinder 6a, a finned tube 6b, a heat preservation cover 6c, a flow baffle 6d, a water inlet 7, a water outlet 8 and a water pump 9.

Detailed Description

Referring to fig. 1 to 3, the utility model discloses a steam boiler with flue gas waste heat recovery function, including steam boiler 1 and steam branch cylinder 2 and the filter 3 of pipe connection respectively with steam boiler 1, be equipped with deoxidization case 4 on the pipeline between filter 3 and steam boiler 1, the running water gets into steam boiler 1 through filter 3 and deoxidization case 4 according to the preface in, steam boiler 1 goes out the mouth of cigarette department and is equipped with chimney 5, is connected with exchange formula waste heat recovery device 6 on chimney 5.

Further, the chimney 5 is Z-shaped, and the chimney 5 is composed of a first L-shaped chimney section 5a and a second L-shaped chimney section 5b which are matched with each other; the vertical part of the first L-shaped chimney section 5a faces downwards and is connected with the steam boiler 1, the vertical part of the second L-shaped chimney section 5b faces upwards, and the exchange type waste heat recovery device 6 is connected between the horizontal parts of the first L-shaped chimney section 5a and the second L-shaped chimney section 5 b. The heat exchange of the exchange type waste heat recovery device 6 is facilitated.

Preferably, the periphery of the first L-shaped chimney section 5a is provided with a heat-insulating layer 5c, and the heat-insulating layer 5c sequentially wraps the aluminum silicate fiber felt, the wire netting and the jacket on the surface of the first L-shaped chimney section 5a from inside to outside. Through setting up heat preservation 5c reducible high temperature flue gas heat loss before getting into exchange formula waste heat recovery device 6, avoid the energy waste.

The water inlet 7 of the exchange type waste heat recovery device 6 is connected with the water outlet pipeline of the filter 3, the water outlet 8 of the exchange type waste heat recovery device 6 is connected with the water inlet pipeline of the deaerating box 4, and the water pump 9 is arranged on the pipeline connected with the water outlet of the filter 3. Introduce into exchange formula waste heat recovery device 6 with the high temperature flue gas, utilize the high temperature flue gas to preheat boiler water, reach the effect of energy saving consumption, solved the extravagant problem of the energy, excellent in use effect.

Specifically, the exchange type waste heat recovery device 6 comprises a heat exchange cylinder 6a connected between chimneys 5 through a flange, and a plurality of finned tubes 6b are arranged in the heat exchange cylinder 6a in a penetrating manner along the horizontal direction; the finned tube 6b is positioned in the heat exchange cylinder 6a, the turn is positioned outside the heat exchange cylinder 6a, the periphery of each finned tube 6b positioned outside the heat exchange cylinder 6a is provided with a heat preservation cover 6c, and the heat preservation cover 6c is fixedly connected with the heat exchange cylinder 6 a; the water inlet 7 of the finned tube 6b is connected with the water outlet pipeline of the filter 3, and the water outlet 8 of the finned tube 6b is connected with the water inlet pipeline of the oxygen removing box 4.

Preferably, a plurality of flow baffles 6d are respectively arranged at intervals on the inner top and the inner bottom of the heat exchange cylinder 6a along the horizontal direction, the flow baffles 6d are matched to form an S-shaped flue gas channel, and the finned tubes 6b are mutually communicated and arranged in the S-shaped flue gas channel. The speed of the high-temperature flue gas passing through the exchange type waste heat recovery device 6 can be delayed, so that the utilization rate of the high-temperature flue gas is improved, the heat exchange effect is ensured, and the energy waste is reduced.

During the use, in the running water enters into finned tube 6b via filter 3 and water pump 9 according to the preface, the high temperature flue gas of steam boiler 1 outlet flue passes through chimney 5 simultaneously and introduces into exchange formula waste heat recovery device 6, carries out the heat exchange, preheats the running water in the finned tube 6b, and the running water after preheating passes through deoxidization case 4 and gets into steam boiler 1 in, has reduced the consumption of the energy and has avoided the waste of the energy.

The above embodiment is the preferred embodiment of the present invention, which is only used to facilitate the explanation of the present invention, it is not right to the present invention, which makes the restriction on any form, and any person who knows commonly in the technical field can use the present invention to make the equivalent embodiment of local change or modification without departing from the technical features of the present invention.

Claims

1. A steam boiler with a flue gas waste heat recovery function comprises a steam boiler (1), a steam cylinder (2) and a filter (3) which are respectively connected with the steam boiler (1) through pipelines, wherein a deoxidizing box (4) is arranged on the pipeline between the filter (3) and the steam boiler (1), and tap water sequentially passes through the filter (3) and the deoxidizing box (4) to enter the steam boiler (1), and the steam boiler is characterized in that a chimney (5) is arranged at a flue outlet of the steam boiler (1), and an exchange type waste heat recovery device (6) is connected to the chimney (5); the water inlet (7) of the exchange type waste heat recovery device (6) is connected with the water outlet pipeline of the filter (3), the water outlet (8) of the exchange type waste heat recovery device (6) is connected with the water inlet pipeline of the deoxidizing box (4), and a water pump (9) is arranged on the pipeline connected with the water outlet of the filter (3).

2. A steam boiler with flue gas waste heat recovery function according to claim 1, characterized in that the chimney (5) is Z-shaped, and the chimney (5) is composed of a first L-shaped chimney section (5a) and a second L-shaped chimney section (5b) which are matched with each other; the vertical part of the first L-shaped chimney section (5a) faces downwards and is connected with the steam boiler (1), the vertical part of the second L-shaped chimney section (5b) faces upwards, and the exchange type waste heat recovery device (6) is connected between the horizontal parts of the first L-shaped chimney section (5a) and the second L-shaped chimney section (5 b).

3. A steam boiler with flue gas waste heat recovery function according to claim 2, characterized in that the periphery of the first L-shaped chimney section (5a) is provided with an insulating layer (5c), and the insulating layer (5c) is composed of an aluminum silicate fiber felt, an iron wire mesh and a jacket, which are sequentially wrapped on the surface of the first L-shaped chimney section (5a) from inside to outside.

4. A steam boiler with flue gas waste heat recovery function according to claim 1 or 2, characterized in that the exchange type waste heat recovery device (6) comprises a heat exchange tube (6a) connected between the chimneys (5) through a flange, and a plurality of finned tubes (6b) are arranged in the heat exchange tube (6a) along the horizontal direction; the finned parts of the finned tubes (6b) are positioned in the heat exchange cylinder (6a), the turning positions are positioned outside the heat exchange cylinder (6a), the peripheries of the finned tubes (6b) positioned outside the heat exchange cylinder (6a) are provided with heat-insulating covers (6c), and the heat-insulating covers (6c) are fixedly connected with the heat exchange cylinder (6 a); the water inlet (7) of the finned tube (6b) is connected with the water outlet pipeline of the filter (3), and the water outlet (8) of the finned tube (6b) is connected with the water inlet pipeline of the oxygen removing box (4).

5. A steam boiler with flue gas waste heat recovery function according to claim 4, characterized in that a plurality of baffle plates (6d) are respectively arranged at intervals along the horizontal direction at the top and the bottom of the heat exchange cylinder (6a), the baffle plates (6d) are matched to form an S-shaped flue gas channel, and the finned tubes (6b) are communicated with each other and arranged in the S-shaped flue gas channel.