Flash removal integrated waste water heat pump

Abstract

The utility model discloses a flash removal integrated waste water heat pump, which belongs to the technical field of heat pumps and is characterized in that a demister is arranged in a flash tank, dead steam generated by the flash tank provides a heat source for a heat pump positioned below the flash tank through inverted U-shaped flash steam channels, and a plurality of inverted U-shaped flash steam channels are connected through a gas passing tank; and the gas passing tank is connected with the heat pump through a plurality of pipelines. The concentrated solution obtained after the desulfurization slurry is treated by the flash tank is conveyed back to the desulfurization tower to be circularly sprayed, so that resource waste caused by traditional direct waste is avoided, and the slurry utilization rate is remarkably increased; meanwhile, the structure of a steam pipeline is simplified, for example, an inverted-U-shaped flash steam channel and a gas passing tank are intensively guided, and pipeline redundancy and maintenance blind areas caused by split equipment are avoided; liquid level monitoring and backwashing self-cleaning functions are built in the system, the design of an access door and a lifting lug is combined, centralized management and rapid maintenance are supported, and the operation and maintenance complexity is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of heat pump, especially a flash integrated wastewater heat pump. BACKGROUND

[0002] In the industrial production process, wastewater treatment and energy utilization have been an important link of concern. Many industrial production activities will produce a large amount of waste water containing waste heat, such as power, chemical, steel and other industries. At present, for the treatment of these waste heat wastewater, mostly only focus on the basic discharge standard, directly discharge wastewater into the environment, not only causes the waste of water resources, but also makes the large amount of waste heat contained in the wastewater be wasted, which cannot be effectively utilized. In the face of energy shortage, this resource waste phenomenon undoubtedly increases the production cost of enterprises, and also causes certain pressure on the environment.

[0003] In the desulfurization process of industrial waste gas, there are many problems in the treatment of desulfurization slurry. In the traditional way, part of the desulfurization slurry is directly discarded after completing the desulfurization task, which cannot realize recycling, resulting in low resource utilization rate. Moreover, the existing equipment is too large to meet the installation requirements in special space environment, and the split installation is not convenient for centralized management and maintenance, which leads to complex steam pipeline. SUMMARY

[0004] The utility model aims at providing a flash integrated wastewater heat pump to solve the above problems in the prior art.

[0005] Technical scheme: a flash integrated wastewater heat pump, comprising: a plurality of flash tanks, a demister is arranged in the flash tank, the steam exhaust of the flash tank provides heat source for the heat pump located below the flash tank through the inverted U-shaped flash steam passage, a plurality of the inverted U-shaped flash steam passages are connected through an air tank, and the air tank is connected with the heat pump through a plurality of pipelines.

[0006] Further, the air tank is located below the flash tank.

[0007] Further, the demister is a baffle demister.

[0008] Further, the flash tank further comprises a backwashing nozzle group for cleaning the demister.

[0009] Further, the backwashing nozzle group is located below or above the demister.

[0010] Further, the flash tank is provided with a slurry inlet and a slurry outlet.

[0011] Further, a support is provided, which is bolted with a connecting part provided on the side wall of the flash tank, and the support is used for bearing a plurality of the flash tanks.

[0012] Further, a liquid level meter is provided on the flash tank.

[0013] Further, an observation lens and an access door are provided on the flash tank.

[0014] Further, a plurality of lifting lugs are provided on the gas passing tank or the flash tank. Beneficial effects

[0015] The application is targeted at the low desulfurization slurry recycling rate, the large equipment volume and the operation and maintenance problems caused by split installation in the industrial flue gas desulfurization link, and the targeted optimization is carried out: the concentrated liquid of the desulfurization slurry after being treated by the flash tank is returned to the desulfurization tower for circular spraying, the resource waste caused by the traditional direct waste is avoided, and the slurry utilization rate is significantly improved; the integrated layout of the equipment is realized through the modular support and the bolt connection by adopting the integrated compact design of the multi-stage parallel flash tank and the heat pump, the land occupation area is greatly reduced, the special space installation demand is adapted, the steam pipeline structure is simplified, such as the concentrated flow guide of the inverted U-shaped flash steam passage and the gas passing tank, the pipeline redundancy and the maintenance blind area caused by the split equipment are avoided, the built-in liquid level monitoring and the backwashing self-cleaning function are combined with the access door and the lifting lug design, the centralized management and the rapid maintenance are supported, and the operation and maintenance complexity is reduced; the high-strength support and the absorption type heat pump work cooperatively, the energy consumption and the space occupation are reduced through the compact design while the flash steam waste heat is efficiently recovered. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the utility model;

[0017] Figure 2 is a side view of the utility model;

[0018] Figure 3 is a schematic view of the installation position of the demister of the utility model.

[0019] The figure signs are as follows: the flash tank 1, the demister 2, the inverted U-shaped flash steam passage 3, the heat pump 4, the gas passing tank 5, the backwashing nozzle group 6, the slurry inlet 7, the slurry outlet 8, the support 9, the connecting part 10, the liquid level meter 11, the observation lens 12, the access door 13, and the lifting lug 14. DETAILED DESCRIPTION

[0020] In the following description, numerous specific details are set forth to provide a more thorough understanding of the present application. However, it will be apparent to one of skill in the art that the present application can be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present application.

[0021] As Figure 1 , Figure 2 and Figure 3 As shown in the drawings, a flash-off integrated wastewater heat pump comprises a plurality of flash tanks 1, a demister 2 is arranged in the flash tank 1, steam waste steam generated by the flash tank 1 provides a heat source for a heat pump 4 located below the flash tank 1 through a reverse U-shaped flash steam passage 3, a plurality of the reverse U-shaped flash steam passages 3 are connected through an air tank 5, the air tank 5 is connected with the heat pump 4 through a plurality of pipelines. The air tank 5 is located below the flash tank 1. The demister 2 is a baffle demister. The flash tank 1 further comprises a backwashing nozzle group 6 for cleaning the demister 2. The backwashing nozzle group 6 is located below or above the demister 2. A slurry inlet 7 and a slurry outlet 8 are arranged on the flash tank 1. A support 9 is further included, the support 9 is connected with a connecting part 10 arranged on the side wall of the flash tank 1 through a bolt, and the support 9 is used for carrying a plurality of the flash tanks 1. A liquid level meter 11 is arranged on the flash tank 1. An observation lens 12 and an access door 13 are arranged on the flash tank 1. A plurality of lifting lugs 14 are arranged on the air tank 5 or the flash tank 1. The demister 2 can also be a cyclone impeller demister, a complex baffle demister, a wire mesh demister, a tube bundle demister and the like, as long as it can realize gas-liquid separation, and the present application is not limited thereto. An access door 13 is arranged on the air tank 5.

[0022] The flash tank 1 is mainly used to flash the waste water in the tank 1 under the negative pressure environment created by the vacuum pump. Multiple flash tanks 1 are arranged in parallel, which not only increases the treatment capacity of the waste water, but also makes full use of the waste heat. The liquid level meter 11 arranged in the tank can monitor the liquid level in the tank in real time, provide data support for stable operation of the system, ensure that the liquid level in the tank is always in a reasonable range, and avoid that the liquid level is too high or too low to affect the flashing effect. The observation lens is convenient for the operator to observe the waste water flashing condition in the tank at any time, such as steam production, bubble state, etc., so as to find abnormalities in time and make adjustments. The maintenance door 13 on the flash tank 1 is convenient for equipment maintenance and repair. When a fault occurs in the tank or needs to be checked regularly, the maintenance door is opened, and the maintenance personnel can enter the tank for maintenance, cleaning and other operations. The flash tank 1 is connected with the bottom of the desulfurization tower, receives the desulfurization slurry as the medium to be flashed, and the slurry outlet 8 sends the flashed desulfurization slurry back to the desulfurization tower for re-spraying, realizing the recycling of the desulfurization slurry and improving the resource utilization rate. The function of the demister 2 is to remove the liquid droplets carried in the flash steam, ensuring the purity of the steam entering the heat pump 4. The demister 2 can be a baffle demister. When the steam carrying liquid droplets flows in the demister, the liquid droplets impact on the baffle due to inertia, thereby separating from the steam and sliding down the baffle surface, effectively reducing the liquid droplet content in the steam. The demister 2 is also equipped with a backwashing nozzle group 6, which can be located below or above the demister 2. After the equipment runs for a period of time, impurities may accumulate on the surface of the demister, affecting the demisting effect. At this time, the backwashing nozzle group 6 will play a role, which can clean the demister by spraying water flow, ensuring that the demister always maintains good working condition. The heat pump 4 can adopt an absorption heat pump. The support 9 needs to have sufficient strength and stability to withstand the weight of the equipment and the vibration and stress generated during operation, providing a solid foundation for safe and reliable operation of the system.

[0023] The present application is targeted at the problems of low desulfurization slurry recycling rate, large equipment size and difficult operation and maintenance caused by split installation in the industrial flue gas desulfurization link. The concentrated liquid after treatment of the desulfurization slurry in the flash tank is returned to the desulfurization tower for cyclic spraying, avoiding the resource waste caused by traditional direct waste, and significantly improving the slurry utilization rate. The integrated layout of the equipment is realized by modular support and bolt connection, the land occupation is greatly reduced, the special space installation demand is adapted, and the steam pipeline structure is simplified, such as the concentrated flow guide of the inverted U-shaped flash steam channel and the gas passing tank, avoiding the pipeline redundancy and maintenance blind area caused by split equipment. The system has built-in liquid level monitoring and backwashing self-cleaning functions, combined with the design of the maintenance door and the lifting lug, supporting centralized management and rapid maintenance, reducing the operation and maintenance complexity. The high-strength support and the absorption heat pump work cooperatively to recover the flash steam waste heat efficiently, and reduce energy consumption and space occupation through compact design. The present application takes resource recycling, structure optimization and intelligent operation and maintenance as the core, solves the problems of resource waste, heavy equipment and low efficiency in traditional desulfurization slurry treatment, and provides an intensive and sustainable solution for the industrial waste gas desulfurization link.

[0024] Working process:

[0025] The desulfurization slurry enters the flash tank 1 through the slurry inlet 7 and is rapidly flashed under the negative pressure environment created by the vacuum pump, and is separated into steam and concentrated liquid. The steam carrying liquid droplets rises to the demister 2 such as baffle, cyclone impeller, etc., and is separated from the steam through inertial impact, and the purified steam is collected into the gas passing tank 5 through the inverted U-shaped flash steam channel 3, and then is transported to the absorption heat pump 4 as a driving heat source, realizing waste heat recovery. The concentrated liquid after flashing is returned to the desulfurization tower for cyclic spraying through the slurry outlet 8, avoiding the resource waste caused by traditional waste. During system operation, the liquid level meter 11 monitors the liquid level in the flash tank 1 in real time, the observation lens 12 assists manual monitoring of the flashing state, the backwashing nozzle group 6 sprays and cleans the demister 2 regularly to prevent impurities from accumulating and affecting the demisting efficiency; the maintenance door 13 and the lifting lug 14 provide convenient maintenance access and safe lifting fulcrum respectively. The modular support 9 fixes multiple flash tanks 1 through bolts and the connecting part 10, forming a compact integrated layout, simplifying the steam pipeline such as the inverted U-shaped channel and the concentrated flow guide of the gas passing tank, solving the problems of large volume and complex pipeline of traditional split equipment. After the heat pump 4 efficiently recovers the steam waste heat, the waste steam is condensed and reused, further reducing energy consumption. Through the cooperation of waste heat cascade utilization, slurry circulation, intelligent monitoring and compact design, the resource intensification and efficient operation and maintenance of the desulfurization link are realized.

[0026] The preferred embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the specific details of the above-described embodiments, and various equivalent transformations of the technical solutions of the present application can be made within the technical concept of the present application, and these equivalent transformations all belong to the protection scope of the present application.

Claims

1. A flashlet integrated wastewater heat pump, characterized in that, The utility model relates to a kind of flash tank systems, including: Multiple flash tanks (1), the demister (2) is arranged in the flash tank (1), the steam waste steam generated by the flash tank (1) provides heat source for heat pump (4) located below the flash tank (1) by inverted U type flash steam passage (3), multiple inverted U type flash steam passage (3) are connected by over gas tank (5), the over gas tank (5) is connected with the heat pump (4) by multiple pipelines.

2. The flash evaporation integrated wastewater heat pump of claim 1, wherein, The over gas tank (5) is located below the flash tank (1).

3. The flash evaporation integrated wastewater heat pump of claim 1, wherein, The demister (2) is baffle demister.

4. The flash evaporation integrated wastewater heat pump of claim 2, wherein, The flash tank (1) further includes backwash nozzle group (6) for cleaning the demister (2).

5. The flash evaporation integrated wastewater heat pump of claim 4, wherein, The backwash nozzle group (6) is located below or above the demister (2).

6. The flash evaporation integrated wastewater heat pump of claim 1, wherein, The flash tank (1) is provided with slurry inlet (7) and slurry outlet (8).

7. The flash evaporation integrated wastewater heat pump of claim 1, wherein, It further includes support (9), the support (9) is bolted with the connecting part (10) arranged on the side wall of the flash tank (1), and the support (9) is used to carry multiple flash tanks (1).

8. The flash evaporation integrated wastewater heat pump of claim 1, wherein, The flash tank (1) is provided with liquid level meter (11).

9. The flash evaporation integrated wastewater heat pump of claim 1, wherein, The flash tank (1) is provided with observation lens (12) and access door (13).

10. The flash evaporation integrated wastewater heat pump of claim 1, wherein, The over gas tank (5) or the flash tank (1) is provided with multiple lifting lugs (14).

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