CN213930894U - Boiler flue demineralized water system of preheating - Google Patents
Boiler flue demineralized water system of preheating Download PDFInfo
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- CN213930894U CN213930894U CN202022975658.8U CN202022975658U CN213930894U CN 213930894 U CN213930894 U CN 213930894U CN 202022975658 U CN202022975658 U CN 202022975658U CN 213930894 U CN213930894 U CN 213930894U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model discloses a boiler flue demineralized water preheating system, which comprises a demineralized water tank, a deaerator, a boiler, a wet chimney, a heat recovery device and a flue gas desulfurization device; the water outlet end of the desalting water tank is connected to the water inlet end of the primary heat exchange water jacket, the water outlet end of the primary heat exchange water jacket is connected to the water inlet end of the heating coil, the water inlet pipe of the heating coil is connected to the water inlet end of the deaerator, and the water outlet end of the deaerator is connected to the boiler; the exhaust end of boiler is connected to the flue import, and flue outlet is connected to the flue gas inlet, and the exhanst gas outlet is connected to wet chimney, the utility model relates to a rationally, low cost not only can reduce the thermal waste of flue to utilize the flue heat, improve thermal utilization ratio, make full use of boiler flue waste heat comes to preheat for the boiler with the feedwater, can improve boiler efficiency, continue recycle for the boiler with boiler exhaust flue gas again and heat, energy-concerving and environment-protective, accord with the in-service use needs.
Description
Technical Field
The utility model relates to a boiler flue demineralized water system of preheating.
Background
The problems of high smoke exhaust temperature, insufficient combustion, low boiler heat efficiency and the like exist in the operation process of an industrial boiler, a large amount of smoke generated by combustion is discharged outdoors, on one hand, a large amount of heat is taken away, on the other hand, a large amount of dust is taken away, and the dust causes serious pollution to the outdoor environment and damages to the body health of people around. The total amount of energy in the heat loss of the exhaust smoke is huge, and the part of energy is fully utilized to preheat the feed water for the boiler, so that the feed water temperature is improved, and the fuel utilization efficiency can be improved to a certain extent. A boiler preheating and recycling device is designed in the prior art, but the heat recycling efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a boiler flue demineralized water preheating system that reasonable in design, low cost, heat recovery efficiency are high is provided.
In order to solve the technical problem, the technical scheme of the utility model is that: boiler flue demineralized water system of preheating, including demineralized water tank, oxygen-eliminating device, boiler and wet chimney, its characterized in that: the device also comprises a heat recovery device and a flue gas desulfurization device;
the heat recovery device comprises a heat exchanger shell, wherein a primary heat exchange water jacket is arranged at the lower part in the heat exchanger shell, the water inlet end of the primary heat exchange water jacket extends out of the heat exchanger shell and is connected to a demineralized water tank of a boiler water supply system through a pipeline, a secondary heat exchange water jacket is arranged at the top end in the heat exchanger shell, and the water outlet end of the secondary heat exchange water jacket extends out of the heat exchanger shell and is connected to a deaerator of the boiler water supply system through a pipeline; a flue flow cavity is formed between the primary heat exchange water jacket and the secondary heat exchange water jacket, a water jacket communicating pipe is also connected between the primary heat exchange water jacket and the secondary heat exchange water jacket, the water jacket communicating pipe is vertically arranged and is positioned in the flue flow cavity, and an ash deposition cavity is arranged below the primary heat exchange water jacket; the heat exchanger comprises a heat exchanger shell, a primary heat exchange water jacket, a primary dust exchange water jacket, a flue flow cavity, a flue inlet, a flue outlet, a plurality of heat conducting rods, a plurality of dust falling holes, a dust accumulation cavity and a dust collecting cavity, wherein the flue inlet is communicated with the flue flow cavity, the flue outlet is communicated with the flue outlet, the top end of the heat conducting rod is extended into the primary heat exchange water jacket, the dust falling holes corresponding to the heat conducting rods are arranged on the primary heat exchange water jacket in a penetrating manner, the top end of each dust falling hole is communicated with the flue flow cavity, the bottom end of each dust falling hole is communicated with the dust accumulation cavity, and the bottom end of the heat conducting rod is extended into the dust falling holes;
the flue gas desulfurization device comprises a desulfurization water tank, a flue gas inlet and a flue gas outlet are formed in the desulfurization water tank, and a heating coil is arranged in the desulfurization water tank;
the water outlet end of the desalting water tank is connected to the water inlet end of the primary heat exchange water jacket, the water outlet end of the primary heat exchange water jacket is connected to the water inlet end of the heating coil, the water inlet pipe of the heating coil is connected to the water inlet end of the deaerator, and the water outlet end of the deaerator is connected to the boiler; the exhaust end of the boiler is connected to the flue inlet, the flue outlet is connected to the flue gas inlet, and the flue gas outlet is connected to the wet chimney.
According to a preferable technical scheme, the primary heat exchange water jacket comprises two primary water jacket fixing plates which are overlapped up and down, a plurality of vertical connecting pipes are arranged between the two primary water jacket fixing plates, the dust falling holes are formed in the inner diameters of the connecting pipes, and a primary heat exchange water cavity for containing desalted water is defined by the two primary water jacket fixing plates, the connecting pipes and the heat exchanger shell.
As a preferred technical scheme, the secondary heat exchange water jacket comprises a secondary water jacket fixing plate fixedly mounted on the heat exchanger shell, and a secondary heat exchange water cavity for containing desalted water is defined between the secondary water jacket fixing plate and the heat exchanger shell; the upper part of the heat conducting rod is fixed on the secondary water jacket fixing plate.
As a preferred technical scheme, the top end of the water jacket communicating pipe is fixed on the secondary water jacket fixing plate and is communicated with the secondary heat exchange water cavity, and the bottom end of the water jacket communicating pipe is fixed on the primary water jacket fixing plate and is communicated with the primary heat exchange water cavity.
As a preferred technical scheme, the water jacket communicating pipe is arranged on one side close to the flue inlet.
Due to the adoption of the technical scheme; the utility model has the advantages that: the method comprises the following steps that desalted water in a desalted water tank enters a heat recovery device to be subjected to primary heating, then enters a desulfurization water tank to be subjected to secondary heating, and finally enters a boiler through a deaerator, high-temperature flue gas generated in the boiler firstly enters the heat recovery device to be cooled, the cooled flue gas continuously enters the desulfurization water tank to be subjected to desulfurization treatment, and pollution-free flue gas subjected to desulfurization treatment is discharged into the atmosphere through a wet chimney; the utility model relates to a rationally, low cost not only can reduce the thermal waste of flue to utilize the flue heat, improve thermal utilization ratio, make full use of boiler flue waste heat comes to preheat for the boiler with the feedwater, can improve boiler efficiency, continue recycle for the boiler heats again boiler exhaust flue gas, energy-concerving and environment-protective, accord with the in-service use needs.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a heat recovery device according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating the arrangement effect of heat conducting rods according to an embodiment of the present invention;
in the figure: 1-a heat exchanger housing; 21-primary water jacket fixing plate; 22-connecting tube; 3-secondary water jacket fixing plate; 4-flue flow chamber; 5-water jacket communicating pipe; 6-ash deposition cavity; 7-flue inlet; 8-flue outlet; 9-heat conducting rods; 10-dust falling hole; 11-a demineralized water tank; 12-a deaerator; 13-a boiler; 14-wet chimney; 15-a heat recovery device; 16-a desulphurizing water tank; 17-a flue gas inlet; 18-a flue gas outlet; 19-heating coil.
Detailed Description
The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
As shown in fig. 1, the boiler flue demineralized water preheating system comprises a demineralized water tank 11, a deaerator 12, a boiler 13 and a wet chimney 14, and is characterized in that: also comprises a heat recovery device 15 and a flue gas desulfurization device.
Referring to fig. 2 and 3, the heat recovery device 15 includes a heat exchanger housing 1, a primary heat exchange water jacket is arranged at the lower part in the heat exchanger housing 1, a water inlet end of the primary heat exchange water jacket extends out of the heat exchanger housing 1 and is connected to a demineralized water tank 11 of a water supply system for a boiler 13 through a pipeline, a secondary heat exchange water jacket is arranged at the top end in the heat exchanger housing 1, and a water outlet end of the secondary heat exchange water jacket extends out of the heat exchanger housing 1 and is connected to a deaerator 12 of the water supply system for the boiler 13 through a pipeline; a flue flow cavity 4 is formed between the primary heat exchange water jacket and the secondary heat exchange water jacket, a water jacket communicating pipe 5 is also connected between the primary heat exchange water jacket and the secondary heat exchange water jacket, the water jacket communicating pipe 5 is vertically arranged and is positioned in the flue flow cavity 4, and an ash deposition cavity 6 is arranged below the primary heat exchange water jacket; the left end of the heat exchanger shell 1 is provided with a flue inlet 7 communicated with a flue flowing cavity 4, the right end of the heat exchanger shell 1 is provided with a flue outlet 8 communicated with the flue flowing cavity 4, the flue flowing cavity 4 is internally provided with a plurality of heat conducting rods 9 arranged between the flue inlet 7 and the flue outlet 8, the top ends of the heat conducting rods 9 extend into the primary heat exchanging water jacket, a plurality of dust falling holes 10 corresponding to the heat conducting rods 9 are arranged on the primary heat exchanging water jacket in a penetrating manner, the top ends of the dust falling holes 10 are communicated with the flue flowing cavity 4, the bottom ends of the dust falling holes 10 are communicated with the dust collecting cavity 6, and the bottom ends of the heat conducting rods 9 extend into the dust falling holes 10.
The flue gas desulfurization device comprises a desulfurization water tank 16, wherein a flue gas inlet 17 and a flue gas outlet 18 are arranged on the desulfurization water tank 16, and a heating coil 19 is arranged in the desulfurization water tank 16. The desulfurization water tank 16 may be a desulfurization pond of the prior art, and is used herein as a flue gas desulfurization for the boiler 13 of the present system. Certainly also can be for being used for the professional equipment that this system desulfurization used, the splendid attire has the liquid that is used for the flue gas desulfurization in the desulfurization jar, and the desulfurization in-process can produce a large amount of heats, can heat for the demineralized water, can cool down for the digester through the demineralized water heat absorption. The flue gas inlet 17 is arranged at the lower part, and the flue gas outlet 18 is arranged at the upper part.
The water outlet end of the desalting water tank 11 is connected to the water inlet end of the primary heat exchange water jacket, the water outlet end of the primary heat exchange water jacket is connected to the water inlet end of the heating coil 19, the water inlet pipe of the heating coil 19 is connected to the water inlet end of the deaerator 12, and the water outlet end of the deaerator 12 is connected to the boiler 13; the exhaust end of the boiler 13 is connected to the flue inlet, the flue outlet is connected to the flue gas inlet 17, and the flue gas outlet 18 is connected to the wet stack 14.
The working principle of the embodiment is as follows:
the desalted water in the desalted water tank 11 enters the heat recovery device 15 to be subjected to primary heating, then enters the desulfurization water tank 16 for secondary heating, finally enters the boiler 13 through the deaerator 12, the high-temperature flue gas generated in the boiler 13 firstly enters the heat recovery device 15 for cooling, the cooled flue gas continuously enters the desulfurization water tank 16 for desulfurization treatment, the non-pollution flue gas after desulfurization treatment is discharged into the atmosphere through the wet chimney 14, in the process, firstly, the high-temperature flue gas discharged by the boiler 13 and the desulfurization water tank 16 are used for heating the feed water for the boiler 13, then the discharged flue gas is desulfurized by using the desulfurization water tank 16, and finally the flue gas discharged into the atmosphere has low temperature and no pollution, in the process, the water supply system for the boiler 13 utilizes the heat of the boiler, so that the heat can be recycled; the utility model relates to a rationally, low cost not only can reduce the thermal waste of flue to utilize the flue heat, improve thermal utilization ratio, make full use of 13 flue waste heat of boiler come to preheat for 13 with the feedwater of boiler, can improve 13 efficiency of boiler, continue recycle for 13 boiler exhaust flue gases heat boiler 13 again, energy-concerving and environment-protective, accord with the in-service use needs.
The working principle of the heat recovery device 15 is as follows:
a large amount of flue gas heat generated by the boiler 13 forms mixed high-temperature gas, the mixed high-temperature gas enters the flue flowing cavity 4 from the flue inlet 7 through a pipeline, and can be contacted with the heat conducting rod 9 in the flue flowing cavity 4 to heat the heat conducting rod 9, because the top end of the heat conducting rod 9 extends into the secondary heat exchange water jacket, the demineralized water in the secondary heat exchange water jacket can be heated, and because the bottom end of the heat conducting rod 9 extends into the primary heat exchange water jacket, the demineralized water in the primary heat exchange water jacket can be heated. Therefore, the heat in the flue flowing cavity 4 is transferred to the primary heat exchange water jacket and the secondary heat exchange water jacket through the heat conducting rod 9; meanwhile, the primary heat exchange water jacket and the secondary heat exchange water jacket are both positioned in the heat exchanger shell 1 and positioned at the upper part and the lower part of the flue flow cavity 4, so that a part of heat in the flue flow cavity 4 is directly transferred into the primary heat exchange water jacket and the secondary heat exchange water jacket;
the demineralized water in the demineralized water tank 11 enters the primary heat exchange water jacket through the water inlet pipe of the primary heat exchange water jacket, is subjected to first temperature raising, then enters the water jacket communicating pipe 5, and because the water jacket communicating pipe 5 is positioned in the flue flowing cavity 4, when the demineralized water passes through the water jacket communicating pipe 5, the demineralized water is subjected to second temperature raising, then enters the secondary heat exchange water jacket, is subjected to third temperature raising, then enters the deaerator 12 from the water outlet end of the secondary heat exchange water jacket, and then enters the boiler 13; in the embodiment, the flow of the demineralized water is from bottom to top, and the flow path of the demineralized water is longer, so that the time for staying in the heat exchanger shell 1 is longer, the heat in the flue flow cavity 4 can be fully utilized for temperature increase, and the utilization rate of the flue gas heat is improved;
when the mixed high-temperature gas is contacted with the heat conducting rod 9, the heat conducting rod 9 is used as a structure for blocking the gas from flowing and also used as a flow blocking pipe, so that the gas can be prevented from flowing too fast, the retention time of heat in the flue flowing cavity 4 is increased, the heat is transferred to the primary heat exchange water jacket and the secondary heat exchange water jacket to the maximum extent, meanwhile, when the flue gas is contacted with the heat conducting rod 9, part of the smoke dust is settled along the flue flowing cavity 4 and falls into the dust accumulation cavity 6 through the dust falling hole 10, after one end of time is accumulated, an opening at the bottom of the dust accumulation cavity 6 is opened, and the smoke dust is discharged.
In this embodiment, the top end of the heat conducting rod 9 extends into the secondary heat exchange water jacket and directly contacts with the demineralized water, so the temperature raising effect in the secondary heat exchange water jacket is the best, and the bottom end of the heat conducting rod 9 extends into the dust falling hole 10 and does not directly contact with the demineralized water, so the temperature raising effect of the primary heat exchange water jacket is slightly poor, and the outer wall of the water jacket communicating pipe 5 directly contacts with the high-temperature gas, so the heat transfer effect is inferior to that of the primary heat exchange water jacket, but the area of the heat transfer effect is smaller than that of the secondary heat exchange water jacket, so the temperature of the demineralized water is raised step by step along the movement direction.
The primary heat exchange water jacket comprises two primary water jacket fixing plates 21 which are overlapped up and down, a plurality of vertical connecting pipes 22 are arranged between the two primary water jacket fixing plates 21, the dust falling holes 10 are formed in the inner diameter of the connecting pipes 22, and a primary heat exchange water cavity for containing desalted water is defined by the two primary water jacket fixing plates 21, the connecting pipes 22 and the heat exchanger shell 1.
The secondary heat exchange water jacket comprises a secondary water jacket fixing plate 3 fixedly mounted on the heat exchanger shell 1, and a secondary heat exchange water cavity for containing desalted water is defined between the secondary water jacket fixing plate 3 and the heat exchanger shell 1; the upper part of the heat conducting rod 9 is fixed on the secondary water jacket fixing plate 3.
The top end of the water jacket communicating pipe 5 is fixed on the secondary water jacket fixing plate 3 and communicated with the secondary heat exchange water cavity, and the bottom end of the water jacket communicating pipe 5 is fixed on the primary water jacket fixing plate 21 and communicated with the primary heat exchange water cavity.
The water inlet pipe of the primary heat exchange water jacket is arranged on one side close to the flue outlet 8, the water outlet pipe of the secondary heat exchange water jacket is arranged on one side close to the flue outlet 8, and the water jacket communicating pipe 5 is arranged on one side close to the flue inlet 7 to increase the flow path of the demineralized water. Because the heat at the flue inlet 7 is not absorbed yet, and the temperature of the heat at the flue outlet 8 is lower, the water jacket communicating pipe 5 is arranged at the side close to the flue inlet 7, so that the purpose of temperature increase is achieved. The water jacket communicating pipe 5 is mainly used for communicating the primary heat exchange water jacket with the secondary heat exchange water jacket, and has a secondary function of temperature raising.
The heat conducting bars 9 are provided with a plurality of rows from left to right, the two adjacent rows are arranged in a staggered manner, referring to fig. 2, the arrangement mode is adopted, so that heat does not directly move backwards from left in a linear manner, but is blocked by the heat conducting bars 9, referring to fig. 2, when the heat passes through the first row from the left, the heat is firstly scattered by the heat conducting bars 9 in the first row and does not move linearly any more, and in order to avoid the heat conducting bar to move around, when the heat conducting bar moves to the second row, the heat conducting bar 9 is contacted to cause the heat conducting bar to move around, and the rest is done in turn, and the heat conducting bar continues to move rightwards until the heat conducting bar is discharged; in the heat movement process, heat can heat the heat conducting rod 9, and in addition, because the heat is forced to turn around, the movement path of the heat in the flue flowing cavity 4 is increased, so that the heat mostly stays in the flue flowing cavity 4 and is absorbed and utilized by the heat conducting rod 9.
The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. Boiler flue demineralized water system of preheating, including demineralized water tank, oxygen-eliminating device, boiler and wet chimney, its characterized in that: the device also comprises a heat recovery device and a flue gas desulfurization device;
the heat recovery device comprises a heat exchanger shell, wherein a primary heat exchange water jacket is arranged at the lower part in the heat exchanger shell, the water inlet end of the primary heat exchange water jacket extends out of the heat exchanger shell and is connected to a demineralized water tank of a boiler water supply system through a pipeline, a secondary heat exchange water jacket is arranged at the top end in the heat exchanger shell, and the water outlet end of the secondary heat exchange water jacket extends out of the heat exchanger shell and is connected to a deaerator of the boiler water supply system through a pipeline; a flue flow cavity is formed between the primary heat exchange water jacket and the secondary heat exchange water jacket, a water jacket communicating pipe is also connected between the primary heat exchange water jacket and the secondary heat exchange water jacket, the water jacket communicating pipe is vertically arranged and is positioned in the flue flow cavity, and an ash deposition cavity is arranged below the primary heat exchange water jacket; the heat exchanger comprises a heat exchanger shell, a primary heat exchange water jacket, a primary dust exchange water jacket, a flue flow cavity, a flue inlet, a flue outlet, a plurality of heat conducting rods, a plurality of dust falling holes, a dust accumulation cavity and a dust collecting cavity, wherein the flue inlet is communicated with the flue flow cavity, the flue outlet is communicated with the flue outlet, the top end of the heat conducting rod is extended into the primary heat exchange water jacket, the dust falling holes corresponding to the heat conducting rods are arranged on the primary heat exchange water jacket in a penetrating manner, the top end of each dust falling hole is communicated with the flue flow cavity, the bottom end of each dust falling hole is communicated with the dust accumulation cavity, and the bottom end of the heat conducting rod is extended into the dust falling holes;
the flue gas desulfurization device comprises a desulfurization water tank, a flue gas inlet and a flue gas outlet are formed in the desulfurization water tank, and a heating coil is arranged in the desulfurization water tank;
the water outlet end of the desalting water tank is connected to the water inlet end of the primary heat exchange water jacket, the water outlet end of the primary heat exchange water jacket is connected to the water inlet end of the heating coil, the water inlet pipe of the heating coil is connected to the water inlet end of the deaerator, and the water outlet end of the deaerator is connected to the boiler; the exhaust end of the boiler is connected to the flue inlet, the flue outlet is connected to the flue gas inlet, and the flue gas outlet is connected to the wet chimney.
2. The boiler flue demineralized water preheating system of claim 1, characterized in that: the primary heat exchange water jacket comprises two primary water jacket fixing plates which are overlapped up and down, a plurality of vertical connecting pipes are arranged between the two primary water jacket fixing plates, the inner diameter of each connecting pipe forms the dust falling hole, and a primary heat exchange water cavity for containing desalted water is defined by the two primary water jacket fixing plates, the connecting pipes and the heat exchanger shell together.
3. The boiler flue demineralized water preheating system of claim 2, characterized in that: the secondary heat exchange water jacket comprises a secondary water jacket fixing plate fixedly arranged on the heat exchanger shell, and a secondary heat exchange water cavity for containing desalted water is defined between the secondary water jacket fixing plate and the heat exchanger shell; the upper part of the heat conducting rod is fixed on the secondary water jacket fixing plate.
4. The boiler flue demineralized water preheating system of claim 3, characterized in that: the top end of the water jacket communicating pipe is fixed on the secondary water jacket fixing plate and communicated with the secondary heat exchange water cavity, and the bottom end of the water jacket communicating pipe is fixed on the primary water jacket fixing plate and communicated with the primary heat exchange water cavity.
5. The boiler flue demineralized water preheating system of claim 1, characterized in that: the water jacket communicating pipe is arranged on one side close to the flue inlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022975658.8U CN213930894U (en) | 2020-12-08 | 2020-12-08 | Boiler flue demineralized water system of preheating |
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| CN202022975658.8U CN213930894U (en) | 2020-12-08 | 2020-12-08 | Boiler flue demineralized water system of preheating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234573A (en) * | 2021-12-20 | 2022-03-25 | 南通市锋芒复合材料科技有限公司 | Heated air circulation type energy-saving drying equipment |
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2020
- 2020-12-08 CN CN202022975658.8U patent/CN213930894U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234573A (en) * | 2021-12-20 | 2022-03-25 | 南通市锋芒复合材料科技有限公司 | Heated air circulation type energy-saving drying equipment |
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