CN216711823U

CN216711823U - Solar-assisted hydrodynamic cavitation device for degrading organic wastewater and producing heat simultaneously

Info

Publication number: CN216711823U
Application number: CN202123018388.2U
Authority: CN
Inventors: 张朝红; 王诗诺; 王君; 房大维; 铁梅
Original assignee: Liaoning University
Current assignee: Liaoning University
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-06-10
Anticipated expiration: 2031-12-02

Abstract

The utility model relates to a device for simultaneously producing heat by using solar energy to assist hydraulic cavitation to degrade organic wastewater. The device comprises a solar heat collection plate, a heat exchanger, an organic pollutant water tank, a water pump, a hydraulic cavitation device consisting of a cavitator I, a cavitator II and a cavitator III, a secondary pipeline and a drain pipe. One end of the water outlet pipe extends into the organic pollutant water tank, the other end of the water outlet pipe sequentially passes through the heat exchanger, the water pump and the hydraulic cavitation device and then flows back into the organic pollutant water tank through the water return pipe, and the heat exchanger is connected with the solar heat collecting plate through a pipeline. According to the utility model, the solar heat collecting plate and the heat exchanger are used for preheating the wastewater, the starting temperature of the hydrodynamic cavitation is properly increased, the occurrence of the hydrodynamic cavitation phenomenon is promoted, the wastewater in the organic pollutant water tank is degraded through the hydrodynamic cavitation process, the temperature of the wastewater is raised, the operation cost is low, the operation is simple, no by-product is generated, the organic wastewater can be treated on a large scale, and simultaneously, a large amount of waste heat generated in the degradation process can be reasonably stored and utilized.

Description

Solar-assisted hydrodynamic cavitation device for degrading organic wastewater and producing heat simultaneously

Technical Field

The utility model belongs to the field of hydrodynamic cavitation and heat production devices, and particularly relates to a device for degrading organic wastewater by a solar-assisted hydrodynamic cavitation device in virtue of a hydrodynamic cavitation process and utilizing generated heat.

Background

At present, wastewater discharged in nature contains a large amount of organic pollutants, such as macromolecular organic matters of benzene compounds, phenolic compounds, various oils, halogen hydrocarbon compounds and the like, the organic matters can cause eutrophication of water bodies of reservoirs and lakes to cause excessive propagation of algae, some algae can generate algal toxins in the metabolic process, and the algal toxins can cause diseases of liver cancer, hepatitis and the like of human bodies. The prior method for treating the organic pollutant wastewater comprises the following steps: coagulating sedimentation, adsorption, biological, chemical oxidation, biological treatment, etc. However, the traditional treatment methods have the defects and limitations of large material consumption, high cost, low efficiency, low recycling rate, long degradation period, low COD and TOC removal rate, insufficient strength, incomplete decomposition and the like. The methods can not effectively treat the dye wastewater, and the use of the methods can cause secondary pollution, so the degradation effect on the organic wastewater is not ideal.

In recent years, the advanced oxidation process has good oxidation capability on complex organic pollutants difficult to degrade, so that the advanced oxidation process becomes an effective technology with wide development potential and application prospect. Generally, the advanced oxidation process includes Fenton oxidation, photocatalytic oxidation, electrochemical oxidation, ultrasonic cavitation, and the like. The high-activity hydroxyl free radical initiates a rapid chain reaction with organic pollutants by adding an oxidant and a catalyst in water or by ultrasonic wave, ultraviolet radiation and other ways, and oxidizes harmful substances into CO unselectively₂、H₂O or inorganic salt, thereby effectively degrading the organic pollutant wastewater. In particular hydrodynamic cavitation as a new type of altitudeThe staged oxidation technology provides possibility for large-scale treatment of dye wastewater and low-cost investment, and is considered to be a very promising organic wastewater degradation method.

Hydrodynamic cavitation refers to the process of formation, development and collapse of vapor or gas pore vacuoles within a liquid or at the liquid-solid interface as the local pressure within the liquid is reduced. Collapse of the vacuole in a very short time (10)^-3ms) to release a large amount of energy, to generate strong shock waves with extremely large destructive power, and local high temperature (5000-10000 ℃) and high pressure (500-1000 atm). The extreme environment generated by hydrodynamic cavitation can generate a large amount of free radicals which further react with organic matters to cause degradation and even mineralization on the one hand, and can release heat to heat liquid on the other hand. However, the conventional hydrodynamic cavitation degradation system has a low starting temperature, generally can reach the optimal operating temperature after operating for a long time under a low temperature condition, and is serious in time and energy waste, and meanwhile, heat generated by hydrodynamic cavitation is not effectively utilized.

SUMMERY OF THE UTILITY MODEL

The utility model provides a solar-assisted water conservancy cavitation organic wastewater treatment device capable of producing heat simultaneously, aiming at solving the problem that organic wastewater cannot be degraded efficiently and completely and waste heat generated at the same time cannot be utilized effectively. The utility model utilizes the solar energy preheating system to heat the effluent wastewater to 20-50 ℃ in a very short time, thereby being beneficial to the occurrence of hydrodynamic cavitation reaction and improving the efficiency of degradation and heat production of hydrodynamic cavitation.

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a solar energy assists hydrodynamic cavitation degradation organic waste water device that produces heat simultaneously, includes the organic pollutant basin, and outlet pipe one end is deepened in the organic pollutant basin, and the other end is connected with the hydrodynamic cavitation device after passing through heat exchanger and water pump in proper order, and wet return one end is connected with the hydrodynamic cavitation device, and the other end is deepened in the organic pollutant basin, and the heat exchanger is connected with solar panel through the pipeline.

Furthermore, in the device, the heating pipes are arranged in the heat exchanger and are spirally arranged, and the water outlet pipe penetrates through the spirally arranged heating pipes.

Furthermore, in the device, the hydrodynamic cavitation device comprises a hydrodynamic cavitation branch line I and a hydrodynamic cavitation branch line II which are parallel, and a thermometer I, a pressure gauge I and a cavitator I are arranged on the hydrodynamic cavitation branch line I; and a thermometer II, a pressure gauge II and a cavitator II are arranged on the hydraulic cavitation branch line II.

Furthermore, the device is provided with a hydrodynamic cavitation branch line III, the hydrodynamic cavitation branch line III is connected with the hydrodynamic cavitation branch line I and the hydrodynamic cavitation branch line II in series and is arranged on a pipeline of the water return pipe, and the hydrodynamic cavitation branch line III is provided with a thermometer III, a pressure gauge III and a cavitator III.

Furthermore, in the device, the cavitator I, the cavitator II and the cavitator III are venturi tubes.

Further, in the device, the cavitator I, the cavitator II and the cavitator III are orifice plates with a plurality of through holes.

Furthermore, the device is provided with a drain pipe, one end of the drain pipe penetrates into the organic pollutant water tank and is arranged at the bottom of the organic pollutant water tank, and the drain pipe is provided with a valve I and a thermometer IV.

Furthermore, the device is provided with a secondary line pipeline, a valve II is installed on the secondary line pipeline, one end of the secondary line pipeline is arranged on a pipeline between the water pump and the hydraulic cavitation device, and the other end of the secondary line pipeline extends into the organic pollutant water tank.

Further, in the device, polyester heat-insulating cotton is sleeved on the auxiliary line pipeline.

Furthermore, polyester heat-insulating cotton is sleeved on the water outlet pipe and the water return pipe of the device.

The utility model has the beneficial effects that:

1. the utility model creatively adopts a solar energy preheating system, organic wastewater is preheated to 20-50 ℃ by utilizing solar energy and then enters the cavitator, and the warm water is more beneficial to the occurrence of hydrodynamic cavitation.

2. The utility model creatively connects two cavitators in parallel and then connects the two cavitators in series with a third cavitator, thereby improving the wastewater treatment capacity, and simultaneously, the wastewater which is subjected to one-time hydraulic cavitation has very high pressure intensity motion and can promote the hydraulic cavitation phenomenon after entering the cavitators again, thereby improving the degradation and heating efficiency.

3. The utility model creatively provides a method for degrading organic wastewater and simultaneously storing and utilizing a high-temperature water source by using a hydrodynamic cavitation degradation heat production system, so that the organic wastewater is degraded thoroughly without secondary pollution, the heating cost is saved, the liquid heating safety is improved, and the environmental protection aim of purifying the organic wastewater and providing high-temperature hot water is fulfilled.

4. The solar-assisted hydrodynamic cavitation degradation heat production system degrades the wastewater in the organic pollutant water tank through the hydrodynamic cavitation process and heats the wastewater in the water tank at the same time, so that the part of heat source can be stored and utilized, resources are greatly saved, the operation cost is low, the efficiency is high, the operation is simple, no by-product is generated, the organic wastewater can be treated in a large scale, and simultaneously a large amount of waste heat generated in the degradation process can be reasonably stored and utilized.

5. The utility model achieves remarkable results by degrading the organic wastewater by using the efficient and green hydrodynamic cavitation system, and simultaneously, high-temperature heat sources generated in the degradation process can be effectively utilized, such as household hot water, an air-conditioning loop, a floor heating loop, a swimming pool and the like, and the water system in the treatment process can be recycled, so that the environment is protected and resources are saved.

Drawings

FIG. 1 is a schematic structural view of a device for simultaneously producing heat by degrading organic wastewater through solar-assisted hydrodynamic cavitation.

Fig. 2 is a schematic structural view of the venturi-type cavitator.

Fig. 3 is a schematic structural view of the orifice plate type cavitator.

Wherein, 1-solar heat collecting plate; 2-a heat exchanger; 3-an organic pollutant water tank; 4-a water pump; 5-thermometer I; 6-pressure gauge I; 7-a cavitator I; 8-thermometer II; 9-pressure gauge II; 10-a cavitator II; 11-thermometer III; 12-pressure gauge III; 13-cavitator III; 14-valve I; 15-a drain pipe; 16-a water outlet pipe; 17-thermometer IV; 18-valve II; 19-a water return pipe.

Detailed Description

As shown in fig. 1-3, a solar-assisted hydrodynamic cavitation treatment device for degrading organic wastewater and simultaneously generating heat comprises a solar heat collection plate (1), a heat exchanger (2), an organic pollutant water tank (3), a water pump (4), a hydrodynamic cavitation device consisting of a cavitator I (7), a cavitator II (10) and a cavitator III (13), a secondary pipeline and a drain pipe (15).

The solar heat collecting plate (1) is connected with the heat exchanger (2). Preferably, a heating pipe (2-1) is arranged in the heat exchanger (2), and the heating pipe (2-1) is spirally arranged. The heating pipe (2-1) is connected with the solar heat collecting plate (1), and the spirally arranged heating pipe (2-1) can heat the liquid in the heat exchanger (2) for heat exchange.

The organic pollutant water tank (3) is used for storing organic pollutant wastewater to be purified, the organic pollutant wastewater is purified and heated after being circulated, and the organic pollutant wastewater is discharged through a drain pipe and utilized after being detected to be in accordance with a drainage standard.

One end of the water outlet pipe (16) extends into the organic pollutant water tank (3), and the other end of the water outlet pipe is connected with the hydraulic cavitation device after sequentially passing through the heat exchanger (2) and the water pump (4). One end of the water return pipe (19) is connected with the hydraulic cavitation device, and the other end of the water return pipe extends into the organic pollutant water tank (3). Preferably, in the embodiment, the water outlet pipe (16) penetrates through the heating pipes (2-1) which are spirally arranged, so that the heat exchange efficiency is increased.

Preferably, in the embodiment, the hydrodynamic cavitation device is composed of a hydrodynamic cavitation branch line I, a hydrodynamic cavitation branch line II and a hydrodynamic cavitation branch line III. The hydrodynamic cavitation branch line I and the hydrodynamic cavitation branch line II are connected in parallel and then are connected in series with the hydrodynamic cavitation branch line III, and the hydrodynamic cavitation branch line III is arranged on a pipeline of the water return pipe (19). A thermometer I (5), a pressure gauge I (6) and a cavitator I (7) are arranged on the hydraulic cavitation branch line I. And a thermometer II (8), a pressure gauge II (9) and a cavitator II (10) are arranged on the hydraulic cavitation branch line II. And a thermometer III (11), a pressure gauge III (12) and a cavitator III (13) are arranged on the hydraulic cavitation branch line III.

Preferably, in one embodiment, as shown in fig. 2, the cavitators i (7), ii (10) and iii (13) are venturi tubes. Venturi tube belongs to the stainless steel material, including contraction section, throat and expansion section, Venturi tube and the pipeline at both ends can adopt the screw thread mode to be connected.

Preferably, in one embodiment, as shown in fig. 3, the cavitators i (7), ii (10) and iii (13) are orifice plates having a plurality of through holes. Preferably, the main body plate of the orifice plate is provided with 1-100 through holes, the diameter of each through hole is 2.0-3.0 mm, and the thickness of the main body plate is 4.0-5.0 mm. The pore plate can be connected with the pipelines at the two ends in a threaded mode.

One end of the drain pipe (15) goes deep into the organic pollutant water tank (3) and is arranged at the bottom of the organic pollutant water tank (3), and a valve I (14) and a thermometer IV (17) are arranged on the drain pipe (15). When the organic polluted wastewater in the organic pollutant water tank (3) meets the drainage standard and the temperature reaches a certain requirement through detection, the organic polluted wastewater is discharged through a drainage pipe and conveyed to a required place for utilization, so that the energy is saved.

A valve II (18) is arranged on the secondary pipeline, one end of the secondary pipeline is arranged on the pipeline between the water pump (4) and the hydraulic cavitation device, and the other end of the secondary pipeline extends into the organic pollutant water tank (3). The secondary line pipeline is used for adjusting the pressure of the whole device. Preferably, the pressure at the water inlet end of the cavitator is controlled to be 1.0-5.0bar through a valve II (18).

Preferably, in order to achieve the heat preservation effect, polyester heat preservation cotton is sleeved on the water outlet pipe (16), the water return pipe (19) and the secondary line pipeline.

The working process of the utility model is as follows:

and the water pump (4) is turned on, the wastewater in the organic pollutant water tank (3) flows out through the water outlet pipe (16), and the heat exchange is carried out between the wastewater in the heat exchanger (2) and the water outlet pipe (16) so as to improve the temperature of the water, and the warm water is more favorable for the occurrence of hydrodynamic cavitation. The preheated wastewater is divided into two parts which respectively enter a cavitator I (7) and a cavitator II (10), the pressure of the wastewater is instantly reduced when the wastewater passes through the cavitator, when the pressure is reduced to the saturated vapor pressure of the liquid or even below, a large amount of cavitation bubbles are generated in the liquid, and the cavitation bubbles can generate hydraulic cavitation under certain hydraulic conditions. The hydrodynamic cavitation phenomenon can locally generate high temperature of 5000 ℃ and high pressure of 101MPa in a very short time, and simultaneously generate shearing force and microjet, in addition, under the action of cavitation effect, water molecules can be cracked to generate a series of active free radicals, and the generation of the conditions can degrade some organic pollutants in water, and simultaneously can quickly raise the water temperature to achieve the purpose of heating. The wastewater subjected to the primary hydrodynamic cavitation moves with high pressure intensity, and enters the cavitator III (13) after being converged, so that the hydrodynamic cavitation phenomenon is promoted, and the degradation and heating efficiency is improved. And the waste water returns to the organic pollutant water tank (3) after passing through the cavitator III (13). Under the driving of the water pump (4), the organic pollutant wastewater can circularly generate a hydrodynamic cavitation phenomenon in the organic pollutant water tank (3), the cavitator I (7), the cavitator II (10) and the cavitator III (13) until the removal effect of the organic pollutants and the water temperature reach an ideal state. The pressure in the device can be regulated by means of a valve II (18) connected to the secondary line. The thermometer IV (17) at the drain pipe (15) can monitor the temperature of the treated water in real time, and the valve I (14) is opened, so that the water in an ideal state can flow out of the drain pipe for non-drinking water.

Although particular embodiments of the present invention have been described, it will be understood by those skilled in the art that the present invention has been described in terms of illustrative embodiments, rather than limiting, and that all equivalent modifications and variations as would be within the spirit of the utility model are intended to be included within the scope of the appended claims.

Claims

1. The utility model provides a device that solar energy assists hydrodynamic cavitation degradation organic waste water while is heat-generating, includes organic pollutant basin (3), its characterized in that, in outlet pipe (16) one end gos deep into organic pollutant basin (3), the other end is connected with the hydrodynamic cavitation device after passing through heat exchanger (2) and water pump (4) in proper order, wet return (19) one end is connected with the hydrodynamic cavitation device, in the other end gos deep into organic pollutant basin (3), heat exchanger (2) are connected with solar panel (1).

2. The device according to claim 1, characterized in that heating pipes (2-1) are arranged in the heat exchanger (2), the heating pipes (2-1) are arranged in a spiral manner, and the water outlet pipe (16) penetrates through the heating pipes (2-1) arranged in a spiral manner.

3. The device as claimed in claim 1, wherein the hydrodynamic cavitation device comprises a hydrodynamic cavitation branch line I and a hydrodynamic cavitation branch line II which are arranged in parallel, and a thermometer I (5), a pressure gauge I (6) and a cavitator I (7) are arranged on the hydrodynamic cavitation branch line I; and a temperature gauge II (8), a pressure gauge II (9) and a cavitator II (10) are arranged on the hydraulic cavitation branch line II.

4. The device according to claim 3, characterized in that a hydrodynamic cavitation branch line III is provided, the hydrodynamic cavitation branch line III is connected in series with the hydrodynamic cavitation branch line I and the hydrodynamic cavitation branch line II and is arranged on a pipeline of the water return pipe (19), and a thermometer III (11), a pressure gauge III (12) and a cavitator III (13) are arranged on the hydrodynamic cavitation branch line III.

5. The apparatus according to claim 4, wherein the cavitator I (7), cavitator II (10) and cavitator III (13) are venturi tubes.

6. The apparatus according to claim 4, wherein the cavitator I (7), the cavitator II (10) and the cavitator III (13) are orifice plates having a plurality of through-holes.

7. The device according to claim 1, wherein a drain pipe (15) is provided, one end of the drain pipe (15) is inserted into the organic pollutant sink (3) and is disposed at the bottom of the organic pollutant sink (3), and a valve I (14) and a thermometer IV (17) are provided on the drain pipe (15).

8. The device according to claim 1, characterized in that a secondary line is provided, on which a valve II (18) is mounted, one end of which is arranged on the line between the water pump (4) and the hydrodynamic cavitation device and the other end extends into the organic pollutant sink (3).

9. The device of claim 8, wherein the secondary line conduit is covered with polyester insulation cotton.

10. The device according to any one of claims 1 to 9, wherein the outlet pipe (16) and the return pipe (19) are both covered with polyester insulating cotton.