CN214243957U

CN214243957U - Waste water recovery device

Info

Publication number: CN214243957U
Application number: CN202022389121.3U
Authority: CN
Inventors: 高云
Original assignee: Hubei Shanshui Chemical Co ltd
Current assignee: Hubei Shanshui Chemical Co ltd
Priority date: 2020-10-24
Filing date: 2020-10-24
Publication date: 2021-09-21
Anticipated expiration: 2030-10-24

Abstract

The utility model relates to a waste water recovery technical field specifically is a waste water recovery device. A wastewater recovery device comprises a reverse osmosis water production device for reverse osmosis treatment of original industrial water, a wastewater ditch for collecting backwash water, a concentrated water tank, a recovery tank and a circulating water tank; the reverse osmosis water production device comprises a pure water outlet and a concentrated water outlet; a concentrated water discharge port of the reverse osmosis water production device is connected with a concentrated water tank through a pipeline; the concentrated water tank is communicated with the recovery tank through a pipeline, and the waste water ditch is communicated with the recovery tank; the recovery tank is communicated with the circulating water tank through a pipeline. The utility model has the advantages that: this waste water recovery unit is used for preparing the whole process of the required pure water of chemical production, carries out reverse osmosis treatment to former industrial water through reverse osmosis system water installation, and the pure water of preparation can directly regard as the chemical production water, can effectively directly retrieve the remaining waste water behind the preparation pure water simultaneously to reutilization.

Description

Waste water recovery device

Technical Field

The utility model relates to a waste water recovery technical field specifically is a waste water recovery device.

Background

Reverse osmosis, also known as reverse osmosis, is a membrane separation operation that uses a pressure differential as a driving force to separate a solvent from a solution. The feed solution on one side of the membrane is pressurized and when the pressure exceeds its osmotic pressure, the solvent will reverse osmosis against the direction of natural osmosis. Thereby obtaining a permeated solvent, i.e., permeate, at the low pressure side of the membrane; the high pressure side yields a concentrated solution, i.e., a concentrate. If seawater is treated by reverse osmosis, fresh water is obtained at the low pressure side of the membrane and brine is obtained at the high pressure side.

In the process of chemical production, the reverse osmosis technology is generally adopted to prepare pure water for industrial production, redundant wastewater generated in the reverse osmosis pure water preparation process comprises concentrated water and backwashing water, about 60% of original industrial water entering reverse osmosis can be changed into pure water through reverse osmosis to be supplied, and in addition, 40% of wastewater needs to be discharged to a sewage treatment station for treatment and then is discharged, and the part of wastewater is not utilized, so that the environmental protection pressure and the treatment cost are increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem who exists among the prior art, provide a waste water recovery device and solve the above-mentioned in-process for satisfying chemical production preparation pure water, only utilize the pure water of reverse osmosis system water preparation equipment preparation, and remaining waste water does not obtain effective utilization, has increased the problem of environmental protection pressure and treatment cost.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a wastewater recovery device comprises a reverse osmosis water production device for reverse osmosis treatment of original industrial water, a wastewater ditch for collecting backwash water, a concentrated water tank, a recovery tank and a circulating water tank; the reverse osmosis water production device comprises a pure water outlet and a concentrated water outlet; a concentrated water discharge port of the reverse osmosis water production device is connected with a concentrated water tank through a pipeline; the concentrated water tank is communicated with the recovery tank through a pipeline, and the waste water ditch is communicated with the recovery tank; the recovery tank is communicated with the circulating water tank through a pipeline; the waste water recovery device also comprises a filter for filtering original industrial water, a filtered water port of the filter is connected with a reverse osmosis water production device through a pipeline, and a reverse washing water outlet of the filter is connected with a waste water ditch through a pipeline; a sedimentation tank for collecting backwash water and a clean water tank for collecting concentrated water are divided in the recovery tank; the sedimentation tank is communicated with the clean water tank through an overflow port, and the overflow port is used for guiding the backwashing water which is precipitated in the sedimentation tank into the clean water tank.

Furthermore, a water pump is arranged on a pipeline between the recovery tank and the circulating water tank.

And the descaling dosing box is arranged at the circulating water tank, and a medicine outlet of the descaling dosing box is communicated with a pipeline extending into the circulating water tank.

The utility model has the advantages that: the wastewater recovery device is used for the whole process of preparing pure water required by chemical production, and the reverse osmosis treatment is carried out on the original industrial water through the reverse osmosis water preparation device, so that the prepared pure water can be directly used as water for the chemical production, and meanwhile, the wastewater left after the pure water is prepared can be effectively and directly recovered for secondary utilization; meanwhile, the backwashing water in the filtering process can be recycled for the second time so as to be recycled later, so that the environmental protection performance is improved, and the treatment cost is greatly reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the system comprises a reverse osmosis water production device, 2, a wastewater ditch, 3, a concentrated water tank, 4, a recovery tank, 41, a sedimentation tank, 42, a clean water tank, 5, a circulating water tank, 6, a water pump, 7, a descaling dosing tank, 8 and a filter.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

Osmosis is the most advanced and energy-saving separation technique in the society at present, and mainly separates pure water and brine, and the ideal semipermeable membrane only can pass water and can not pass salt, in this case, one side of pure water spontaneously passes through the semipermeable membrane to enter one side of brine, and the phenomenon is the so-called osmosis, if pressure is applied to brine on one side of brine of the membrane, the flow of water is reduced until the pressure of salt is pressed, when the pressure reaches a certain limit, water can not flow through the membrane, and the static flow of water is equal to zero, and the pressure is called osmotic pressure. When the applied pressure is greater than the osmotic pressure, the flow direction of the water is reversed, which is the principle of reverse osmosis of water.

In the chemical production process, pure water is required in the chemical production process for industrial production at present, in order to meet the requirement of the pure water required in the chemical production, reverse osmosis treatment is generally carried out on raw industrial water produced by a water plant through reverse osmosis water production equipment, only the pure water prepared by the reverse osmosis water production equipment is utilized in the whole process, the rest wastewater is not effectively utilized, and the environmental protection pressure and the treatment cost are increased; in addition, need intercept the large granule impurity such as silt, impurity and suspended solid in former industrial water through the filter before carrying out reverse osmosis treatment to former industrial water to come out impurity backwash through the backwash water, with the whole reverse osmosis unit of follow-up jam. After handling former industrial water, can be directly as chemical production normal use to the pure water of production through corresponding the pipeline, but concentrated water and backwash water after the backwash generally directly discharge to sewage treatment station after outer row, do not obtain fine utilization, to this the utility model discloses a waste water recovery device.

The utility model also provides an preferred embodiment

As shown in fig. 1, the wastewater recovery device of the utility design comprises a reverse osmosis water production device 1 for reverse osmosis treatment of raw industrial water, a wastewater ditch 2 for collecting backwash water, a concentrated water tank 3, a recovery tank 4 and a circulating water tank 5; the reverse osmosis water production device 1 comprises a pure water outlet and a concentrated water outlet; a concentrated water discharge port of the reverse osmosis water production device 1 is connected with the concentrated water tank 3 through a pipeline, and a pure water discharge port of the reverse osmosis water production device 1 is discharged through a pipeline to be used as normal water for chemical production; after the original industrial water enters the reverse osmosis water making device 1, pressurizing is carried out through a pressurizing pump, water molecules permeate from a reverse osmosis membrane to become pure water, and water with higher salt concentration is intercepted at the other side of the reverse osmosis membrane to become concentrated water to be discharged; the concentrated water tank 3 is communicated with the recovery tank 4 through a pipeline, and the waste water ditch 2 is communicated with the recovery tank 4; the recovery tank 4 is communicated with the circulating water tank 5 through a pipeline, and a water pump 6 is further arranged on the pipeline between the recovery tank 4 and the circulating water tank 5; through the backwash water and the dense water of recovery pond 4 to the collection mix, carry the waste water of mixing to 5 inner circulations of circulating water pond through water pump 6 and use, accomplish the secondary recovery process to waste water promptly, reduced water treatment's cost by a wide margin.

It should be noted that the circulating water in the circulating water tank 5 can be used for a cooling heat exchange system of the whole heat exchange equipment, and the heat-exchanged hot circulating water is cooled by a water cooling tower fan and then circulated into the circulating water tank 5 for the next working cycle; in the whole heat transfer process, the circulating water exists certain loss because of evaporation and blowdown, and the utility model discloses a waste water recovery device retrieves through waste water and backwash water to producing in the pure water preparation with the replenishment as cooling heat transfer system well circulating water, has effectively practiced thrift the industrial water, has also reduced the sewage treatment cost.

In this embodiment, in order to remove impurities from the original industrial water before reverse osmosis treatment, the wastewater recovery device further includes a filter 8 for filtering the original industrial water, a filtered water gap of the filter 8 is connected to the reverse osmosis water production device 1 through a pipeline, a backwash water outlet of the filter 8 is connected to the wastewater ditch 2 through a pipeline, and large-particle impurities in the original industrial water are filtered by the filter 8.

In this embodiment, in order to filter large-particle impurities in the backwash water, a sedimentation tank 41 for collecting backwash water and a clean water tank 42 for collecting concentrated water are divided in the recovery tank 4; the sedimentation tank 41 and the clean water tank 42 are communicated through an overflow port, and the overflow port is used for guiding the backwashing water which is sedimented in the sedimentation tank 41 into the clean water tank 42. The sedimentation tank 41 through the division carries out preliminary sedimentation treatment to the backwash water of collection, and the supernatant accessible overflow mouth overflow of the backwash water through the sediment mixes with dense water in to clear water basin 42 to effectively large particle impurity such as silt, impurity and suspended solid in the filtering waste water.

In this embodiment, in order to avoid the scale formation of the recovered wastewater, the wastewater recovery apparatus further includes a descaling dosing box 7 disposed at the circulating water tank 5, a drug outlet of the descaling dosing box 7 is communicated with a pipeline extending into the circulating water tank 5, and a descaling agent is added through the descaling dosing box 7, so as to solve the problems of scale formation, dirt blockage and the like caused by too high salinity in water. And the circulating water quality in the circulating water tank 5 can be periodically analyzed at a later stage, and a mode of properly adding the scale inhibitor or increasing the sewage discharge amount is selected according to the water quality condition, so that the circulating water is ensured to meet the standard.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A waste water recovery device is characterized by comprising a reverse osmosis water production device (1) for reverse osmosis treatment of original industrial water, a waste water ditch (2) for collecting reverse washing water, a concentrated water tank (3), a recovery pool (4) and a circulating water pool (5); the reverse osmosis water production device (1) comprises a pure water outlet and a concentrated water outlet; a concentrated water discharge port of the reverse osmosis water production device (1) is connected with a concentrated water tank (3) through a pipeline; the concentrated water tank (3) is communicated with the recovery tank (4) through a pipeline, and the waste water ditch (2) is communicated with the recovery tank (4); the recovery tank (4) is communicated with the circulating water tank (5) through a pipeline; the wastewater recovery device also comprises a filter (8) for filtering the original industrial water, a filtered water port of the filter (8) is connected with the reverse osmosis water production device (1) through a pipeline, and a reverse washing water outlet of the filter (8) is connected with the wastewater ditch (2) through a pipeline; a sedimentation tank (41) for collecting backwash water and a clean water tank (42) for collecting concentrated water are divided in the recovery tank (4); the sedimentation tank (41) is communicated with the clean water tank (42) through an overflow port, and the overflow port is used for guiding the backwashing water which is sedimentated in the sedimentation tank (41) into the clean water tank (42).

2. The wastewater reclamation device as recited in claim 1, wherein a water pump (6) is further arranged on a pipeline between the reclamation pond (4) and the circulating water pond (5).

3. The wastewater reclamation device as recited in claim 1, further comprising a descaling dosing box (7) arranged at the circulating water tank (5), wherein the outlet of the descaling dosing box (7) is communicated with a pipeline extending into the circulating water tank (5).