CN214468736U - Waste heat recovery device of coal-fired boiler - Google Patents
Waste heat recovery device of coal-fired boiler Download PDFInfo
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- CN214468736U CN214468736U CN202120608851.XU CN202120608851U CN214468736U CN 214468736 U CN214468736 U CN 214468736U CN 202120608851 U CN202120608851 U CN 202120608851U CN 214468736 U CN214468736 U CN 214468736U
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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 waste heat recovery device of a coal-fired boiler, which comprises a hot water tank, a water pump and a water storage tank, wherein the water pump is arranged at the bottom of the hot water tank, the water storage tank is provided with a water inlet, and the water outlet end of the water pump is communicated with the water inlet of the water storage tank; still be equipped with the controller, the controller is equipped with five at least signal input ports of group and two sets of signal output port, the signal input port of controller is connected with first liquid level switch, second liquid level switch, third liquid level switch, fourth liquid level switch and temperature sensor electricity respectively, the signal output port of controller is connected with water pump and controllable valve electricity respectively. The utility model has the advantages that: store hot water for subsequent use, can improve hot water use efficiency, avoid the waste of heat energy, simple structure, convenient to use.
Description
Technical Field
The utility model belongs to the technical field of boiler equipment technique and specifically relates to a coal fired boiler's waste heat recovery device.
Background
The tail gas of the boiler contains a large amount of heat, and if the tail gas is not utilized, a large amount of heat energy is wasted. The existing waste heat recovery device has the following defects: although heat can be collected by hot water, the hot water is not stored, and thus waste heat is not effectively utilized.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model discloses a coal fired boiler's waste heat recovery device, it is reserve to store hot water, can improve hydrothermal availability factor, avoids the waste of heat energy, simple structure, convenient to use.
The technical scheme of the utility model is that:
a waste heat recovery device of a coal-fired boiler comprises a hot water tank, wherein the hot water tank is provided with an air inlet and an air outlet, the air inlet of the hot water tank is connected with a flue gas outlet of the boiler, and the air outlet of the hot water tank is connected with an air inlet of a flue gas treatment device; the hot water tank is internally provided with a plurality of heat exchange tubes, the head end and the tail end of each heat exchange tube are respectively connected with an air inlet of the hot water tank and an air outlet of the hot water tank, when smoke passes through the heat exchange tubes, a heating zone can be formed in the hot water tank to heat water in the hot water tank, and the bottom of the hot water tank is provided with a temperature sensor for measuring the temperature of the hot water; the water heater is also provided with a water pump and a water storage tank, the water pump is arranged at the bottom of the hot water tank, the water storage tank is provided with a water inlet, and the water outlet end of the water pump is communicated with the water inlet of the water storage tank; the bottom of the water storage space in the hot water tank is provided with a first liquid level switch, the top of the water storage space in the hot water tank is provided with a second liquid level switch, the bottom of the water storage space in the water storage tank is provided with a third liquid level switch, the top of the water storage space in the water storage tank is provided with a fourth liquid level switch, the top of the hot water tank is provided with a water inlet pipe, the water inlet pipe is connected with a controllable valve, and a water inlet of the controllable valve is connected with a tap water pipe; still be equipped with the controller, the controller is equipped with five at least signal input ports of group and two sets of signal output port, the signal input port of controller is connected with first liquid level switch, second liquid level switch, third liquid level switch, fourth liquid level switch and temperature sensor electricity respectively, the signal output port of controller is connected with water pump and controllable valve electricity respectively.
Further, the controller is Siemens LOGO! And a controller.
Preferably, the controllable valve is an electrically operated valve.
Furthermore, the outside of the hot water tank and the water storage tank is coated with heat insulation materials.
The utility model has the advantages that: through setting up hot-water tank and storage water tank, adopt controller, sensor and liquid level switch control hot water temperature to the hot water storage that will accord with the temperature is got up for subsequent use, can improve hydrothermal availability factor, avoids the waste of heat energy, simple structure, convenient to use.
The present invention will be further explained with reference to the drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a block diagram of a control system according to embodiment 1 of the present invention.
Shown in the figure: 1 is the hot-water tank, 2 is the boiler, 3 is flue gas processing apparatus, 4 is the heat exchange tube, 5 is temperature sensor, 6 is the water pump, 7 is the storage water tank, 8 is first liquid level switch, 9 is second liquid level switch, 10 is third liquid level switch, 11 is fourth liquid level switch, 12 is the inlet tube, 13 is controllable valve.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is not intended to limit the invention.
Example 1
As shown in fig. 1-2, a waste heat recovery device of a coal-fired boiler 2 comprises a hot water tank 1, wherein the hot water tank 1 is provided with an air inlet and an air outlet, the air inlet of the hot water tank 1 is connected with a flue gas outlet of the boiler 2, and the air outlet of the hot water tank 1 is connected with an air inlet of a flue gas treatment device 3; a plurality of heat exchange tubes 4 are arranged in the hot water tank 1, the head end and the tail end of each heat exchange tube 4 are respectively connected with an air inlet of the hot water tank 1 and an air outlet of the hot water tank 1, when smoke passes through the heat exchange tubes 4, a heating zone can be formed in the hot water tank 1 to heat water in the hot water tank 1, and a temperature sensor 5 is arranged at the bottom of the hot water tank 1 and used for measuring the temperature of the hot water; the hot water boiler is also provided with a water pump 6 and a water storage tank 7, wherein the water pump 6 is arranged at the bottom of the hot water tank 1, the water storage tank 7 is provided with a water inlet, and the water outlet end of the water pump 6 is communicated with the water inlet of the water storage tank 7; a first liquid level switch 8 is arranged at the bottom of a water storage space in the hot water tank 1, a second liquid level switch 9 is arranged at the top of the water storage space in the hot water tank 1, a third liquid level switch 10 is arranged at the bottom of the water storage space in the water storage tank 7, a fourth liquid level switch 11 is arranged at the top of the water storage space in the water storage tank 7, a water inlet pipe 12 is arranged at the top of the hot water tank 1, the water inlet pipe 12 is connected with a controllable valve 13, and a water inlet of the controllable valve 13 is connected with a tap water pipe; still be equipped with the controller, the controller is equipped with five at least signal input ports of group and two sets of signal output port, the signal input port of controller is connected with first liquid level switch 8, second liquid level switch 9, third liquid level switch 10, fourth liquid level switch 11 and temperature sensor 5 electricity respectively, the signal output port of controller is connected with water pump 6 and controllable valve 13 electricity respectively.
Further, the controller is Siemens LOGO! And a controller. Siemens LOGO! The controller is a small compact programmable controller, has low cost and is very suitable for a small control system.
Preferably, the controllable valve 13 is an electric valve. Compared with a pneumatic valve, the electric valve does not need an air source and is convenient to use.
Furthermore, the outside of the hot water tank 1 and the water storage tank 7 is coated with heat insulation materials, so that heat loss can be avoided.
The utility model discloses a theory of operation is: after the flue gas that comes out from boiler 2 directly gets into waste heat recovery device, advance to go into hot-water tank 1 and carry out the heat transfer, can form the zone of heating when the flue gas passes through from among a plurality of heat exchange tubes 4 in the hot-water tank 1 inside and heat the water in hot-water tank 1. The bottom of the hot water tank 1 is provided with a temperature sensor 5 for measuring the temperature of hot water, when the temperature is higher than a set value, the controller controls the water pump 6 to work, so that the hot water is pumped from the hot water tank 1 to the water storage tank 7 and stored for later use, and the electric valve is controlled to inject cold water into the hot water tank 1 to continue heating after water injection is completed. The first level switch 8, the second level switch 9, the third level switch 10 and the fourth level switch 11 may be used to control the water level in the water tank. The hot water of the hot water tank 1 can be used for staff bathing or other purposes.
The utility model discloses a set up hot-water tank 1 and storage water tank 7, adopt controller, sensor and liquid level switch control hot water temperature to the hot water storage that will accord with the temperature is got up for subsequent use, can improve hydrothermal availability factor, avoids the waste of heat energy, simple structure, convenient to use.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Of course, the above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and it should be noted that any equivalent substitution and obvious modification made by those skilled in the art under the guidance of the present specification fall within the essential scope of the present specification, and the present invention should be protected.
Claims (4)
1. The utility model provides a coal fired boiler (2) waste heat recovery device, includes hot-water tank (1), its characterized in that: the hot water tank (1) is provided with an air inlet and an air outlet, the air inlet of the hot water tank (1) is connected with a flue gas outlet of the boiler (2), and the air outlet of the hot water tank (1) is connected with an air inlet of the flue gas treatment device (3); the hot water tank (1) is internally provided with a plurality of heat exchange tubes (4), the head end and the tail end of each heat exchange tube (4) are respectively connected with an air inlet of the hot water tank (1) and an air outlet of the hot water tank (1), when smoke passes through the heat exchange tubes (4), a heating zone can be formed in the hot water tank (1) to heat water in the hot water tank (1), and the bottom of the hot water tank (1) is provided with a temperature sensor (5) for measuring the temperature of the hot water; the hot water boiler is also provided with a water pump (6) and a water storage tank (7), wherein the water pump (6) is arranged at the bottom of the hot water tank (1), the water storage tank (7) is provided with a water inlet, and the water outlet end of the water pump (6) is communicated with the water inlet of the water storage tank (7); the water heater is characterized in that a first liquid level switch (8) is arranged at the bottom of a water storage space in the hot water tank (1), a second liquid level switch (9) is arranged at the top of the water storage space in the hot water tank (1), a third liquid level switch (10) is arranged at the bottom of the water storage space in the water storage tank (7), a fourth liquid level switch (11) is arranged at the top of the water storage space in the water storage tank (7), a water inlet pipe (12) is arranged at the top of the hot water tank (1), the water inlet pipe (12) is connected with a controllable valve (13), and a water inlet of the controllable valve (13) is connected with a tap water pipe; still be equipped with the controller, the controller is equipped with five at least signal input ports of group and two sets of signal output port, the signal input port of controller is connected with first liquid level switch (8), second liquid level switch (9), third liquid level switch (10), fourth liquid level switch (11) and temperature sensor (5) electricity respectively, the signal output port of controller is connected with water pump (6) and controllable valve (13) electricity respectively.
2. A waste heat recovery device of a coal fired boiler (2) according to claim 1 characterized in that: the controller is Siemens LOGO! And a controller.
3. A waste heat recovery device of a coal fired boiler (2) according to claim 1 characterized in that: the controllable valve (13) is an electric valve.
4. A waste heat recovery device of a coal fired boiler (2) according to any of claims 1-3 characterized in that: the hot water tank (1) and the water storage tank (7) are externally coated with heat insulation materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120608851.XU CN214468736U (en) | 2021-03-25 | 2021-03-25 | Waste heat recovery device of coal-fired boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120608851.XU CN214468736U (en) | 2021-03-25 | 2021-03-25 | Waste heat recovery device of coal-fired boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214468736U true CN214468736U (en) | 2021-10-22 |
Family
ID=78159944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120608851.XU Active CN214468736U (en) | 2021-03-25 | 2021-03-25 | Waste heat recovery device of coal-fired boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214468736U (en) |
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2021
- 2021-03-25 CN CN202120608851.XU patent/CN214468736U/en active Active
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