Industrial strong brine resource utilization device
By using separation treatment lines and compressor heating methods in the high-concentration salt-containing wastewater treatment in the petrochemical and coal chemical industries, the separation and resource utilization problems of high-concentration salt-containing wastewater are solved, and low-cost salt separation and resource recycling are achieved.
Patent Information
- Application Number
- CN202422479326.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-10-14
AI Technical Summary
The existing technology is difficult to effectively treat high-concentration salt-containing wastewater generated by the petrochemical and coal chemical industries, resulting in waste of resources and environmental pollution, and the treatment cost is high.
Using an industrial concentrated brine resource utilization device including the first and second separation treatment lines, two salts are separated at different temperatures through steps such as evaporation, flash evaporation, centrifugation and compressor, and the compressor is used to heat it by pressurizing the secondary steam latent heat to reduce energy consumption.
The efficient separation and resource utilization of the two salts has been achieved, energy consumption and operating costs have been reduced, and significant economic and social benefits have been achieved.
Smart Images
Figure CN223280660U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an industrial concentrated brine resource utilization device, belonging to the technical field of chemical equipment. Background Art
[0002] The petrochemical and coal chemical industries generate large quantities of highly concentrated, salty wastewater containing diverse components during production. Due to its complex composition, difficulty in treatment, and high cost, it is often concentrated and crystallized by evaporation without further salt separation and crystallization. The resulting mixed salts have no economic value and, if improperly disposed of, can cause significant environmental pollution. Separating and purifying the substances in wastewater can achieve resource utilization and have significant social and economic benefits. Utility Model Content
[0003] The utility model aims to provide an industrial concentrated brine resource utilization device, which is suitable for separating two salts in industrial concentrated brine with deviations in solubility at different temperatures.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0005] An industrial brine resource utilization device includes a first separation and processing line and a second separation and processing line; the first separation and processing line includes a preheater, a heating chamber, an evaporator, a thickener, a centrifuge, and a mother liquid tank connected in sequence; the steam outlet of the evaporator is connected to a compressor, which is also connected to the heating chamber; a slurry pump is provided on the pipeline between the evaporator and the thickener;
[0006] The second separation and treatment line includes a flash evaporator, a second thickener, a second centrifuge, and a second mother liquor tank connected in sequence; the steam outlet of the flash evaporator is connected to the second compressor, which is also connected to the second preheater; the clear liquid outlet of the flash evaporator is connected to the second preheater; a slurry pump is provided on the pipeline between the flash evaporator and the second thickener;
[0007] The evaporator of the first separation treatment line is communicated with the flash evaporator of the second separation treatment line; the second preheater of the second separation treatment line is communicated with the evaporator of the first separation treatment line.
[0008] A further improvement of the technical solution of the present utility model is that the gas outlet of the second preheater of the second separation processing line is connected to the vacuum pump.
[0009] A further improvement of the technical solution of the present invention is that the condensed water outlet of the heating chamber of the first separation processing line is also connected to the preheater.
[0010] The further improvement of the technical solution of the utility model is as follows: the working temperature in the evaporator is 100-120°C; the working temperature in the flash evaporator is 50-70°C.
[0011] A further improvement of the technical solution of the utility model is that the evaporator is a single-stage evaporator or a multi-stage evaporator; and the flash evaporator is a multi-stage flash evaporator.
[0012] A further improvement of the technical solution of the present utility model is that the second compressor can also be replaced by a heat pump.
[0013] Due to the adoption of the above technical solution, the technical effects achieved by the utility model are as follows:
[0014] The device can be used to separate two salts in industrial concentrated brine with solubility deviations at different temperatures.
[0015] This device fully realizes the harmlessness, reduction and resource utilization of mixed salt, and has good social benefits.
[0016] This device uses a compressor to pressurize the secondary steam and then uses its latent heat to heat the material. The entire system only needs to add a small amount of steam, with low energy consumption and low operating costs.
[0017] This device has advanced technology, low comprehensive energy consumption and low operating cost.
[0018] The salt solids obtained by the device can meet the requirements of industrial applications and can separate substances in industrial wastewater to obtain usable salt, which can be sold to the outside world and realize resource utilization. The device has significant economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the present utility model. DETAILED DESCRIPTION
[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.
[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0022] The utility model relates to an industrial concentrated brine resource utilization device, which is mainly suitable for separating two salts in concentrated brine with deviations in solubility at different temperatures.
[0023] The device needs to separate two salts, and is provided with a first separation processing line and a second separation processing line. The first separation processing line is used to separate one salt, and the second separation processing line is used to separate the other salt.
[0024] This device is designed to recycle high-concentration wastewater containing two components, producing two types of industrial salt crystals that meet standards. For example, wastewater containing sodium nitrate and sodium chloride, sodium sulfate and sodium chloride, and potassium chloride and sodium chloride, etc. By utilizing the different solubility ratios of the components in the wastewater at different temperatures and switching between different evaporation temperatures, the saturation states of the two salts at different temperatures are achieved, allowing the extraction of two salt solids that meet purity standards.
[0025] like Figure 1 As shown, the left side of the dotted line in the figure is the first separation and processing line. The first separation and processing line includes a preheater 1, a heating chamber, an evaporator, a thickener 1, a centrifuge 1 and a mother liquor tank 1 connected in sequence. Each processor is connected through a pipeline, and the material is transported by a pump. The raw liquid enters the preheater 1 for preheating treatment, and after being heated in the heating chamber, it is sent to the evaporator for evaporation treatment. Then, the material is sent to the thickener 1 for thickening, and then enters the centrifuge 1 for centrifugal separation. The solid 1 is obtained by centrifugal separation, which is the first salt. The separated mother liquor enters the mother liquor tank 1, and is then sent to the evaporator for repeated circulation treatment. A slurry pump is set on the pipeline between the evaporator and the thickener 1.
[0026] The evaporator in the first separation processing line has a steam outlet connected to compressor 1, which is also connected to the heating chamber. The secondary steam evaporated from the evaporator is pressurized and heated by compressor 1 before entering the heating chamber, where it condenses through heat exchange with the material in the shell and tube sides. Furthermore, the condensate outlet of the heating chamber in the first separation processing line is also connected to preheater 1. From the heating chamber, the condensate enters preheater 1, exchanges heat with the feed liquid, and then exits the system.
[0027] like Figure 1As shown, the second separation and processing line is to the right of the dotted line in the figure. The second separation and processing line includes a flash evaporator, a thickener 2, a centrifuge 2, and a mother liquor tank 2, connected in sequence. Each processor is connected by a pipeline. The evaporator of the first separation and processing line is connected to the flash evaporator of the second separation and processing line by a pipeline, and the material is transferred by a pump. The clear liquid remaining after the material is processed in the evaporator of the first separation and processing line is pumped through a pipeline to the flash evaporator of the second separation and processing line. After vacuum flash evaporation and cooling, another salt crystal is precipitated to form a slurry. The slurry is pumped into the thickener 2 for thickening. After thickening, it is sent to the centrifuge 2 for separation to obtain solid 2, which is the second salt. The mother liquor after treatment in the centrifuge 2 enters the mother liquor tank 2, and then returns from the mother liquor tank 2 to the flash evaporator through a pipeline. The clear liquid from the flash evaporator is taken, preheated, and returned to the evaporator for further evaporation, repeating the process. A slurry pump is installed in the pipeline between the flash evaporator and the thickener 2.
[0028] The steam outlet of the flash evaporator in the second separation and processing line is connected to Compressor 2, which is also connected to Preheater 2. The secondary steam evaporated from the flash evaporator is pressurized and heated by Compressor 2 before entering Preheater 2. Heat exchange between the shell and tube sides causes condensation, and the condensed water is removed. The gas outlet of Preheater 2 in the second separation and processing line is connected to a vacuum pump, and the non-condensable gas is extracted by the vacuum pump.
[0029] The clear liquid outlet of the flash evaporator is connected to preheater 2, which is also connected to the evaporator of the first separation line. The clear liquid after flash evaporation is sent to preheater 2, where it is preheated and then sent to the evaporator of the first separation line for further treatment.
[0030] When the device is in operation, preferably, the operating temperature in the evaporator is controlled to be 100-120°C; and the operating temperature in the flash evaporator is controlled to be 50-70°C.
[0031] When the device is in use, there is flow of materials, water and steam.
[0032] Material direction:
[0033] The wastewater feedstock enters preheater 1, where it is preheated by evaporated condensate before entering the evaporator. Evaporation and concentration produce a slurry of crystals of the first salt. This slurry is pumped into thickener 1, where solid-liquid separation is performed in centrifuge 1 to produce solid 1, the first salt. The mother liquor is returned to the evaporator for further evaporation. The clear liquid is removed from the evaporator and sent to a flash evaporator for vacuum flash cooling to precipitate the crystals of the second salt. This slurry is pumped into thickener 2, where solid-liquid separation is performed in centrifuge 2 to produce solid 2, the second salt. The mother liquor is returned to the flash evaporator. The clear liquid from the flash evaporator is preheated and returned to the evaporator for further evaporation to produce solid 1.
[0034] Water and steam flow direction:
[0035] The secondary steam evaporated from the evaporator is pressurized and heated by the compressor before entering the heating chamber. The material in the shell and tube passes through the heat exchanger and condenses. The condensed water enters the preheater 1, exchanges heat with the raw material liquid, and is discharged from the system. The non-condensable gas is extracted by a vacuum pump.
[0036] The secondary steam flashed out of the flash evaporator is pressurized and heated by the compressor before entering the second preheater, where it is condensed after heat exchange with the feed liquid, and the condensed water is discharged from the system.
[0037] Based on the above structure, the evaporator of this device can be a single-stage evaporator or a multi-stage evaporator. When the processing capacity is large, the multi-stage evaporator has lower operating costs. The flash cooling part can also use multi-stage flash cooling and multi-stage preheating. The flash cooling part can also use refrigeration cooling. The second compressor can also be a heat pump.
[0038] This device is suitable for separating two salts in industrial concentrated brine with different solubility deviations at different temperatures, and can produce two types of industrial salts that meet standards. This device can achieve harmlessness, reduction and resource utilization of mixed salts, and has good social benefits.
[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.
Claims
1. An industrial brine resource utilization device, characterized by: It includes a first separation processing line and a second separation processing line; the first separation processing line includes a preheater 1, a heating chamber, an evaporator, a thickener 1, a centrifuge 1 and a mother liquid tank 1 connected in sequence; the steam outlet of the evaporator is connected to a compressor 1, and the compressor 1 is also connected to the heating chamber; a slurry pump is provided on the pipeline between the evaporator and the thickener 1; The second separation and treatment line includes a flash evaporator, a second thickener, a second centrifuge, and a second mother liquor tank connected in sequence; the steam outlet of the flash evaporator is connected to the second compressor, which is also connected to the second preheater; the clear liquid outlet of the flash evaporator is connected to the second preheater; a slurry pump is provided on the pipeline between the flash evaporator and the second thickener; The evaporator of the first separation treatment line is communicated with the flash evaporator of the second separation treatment line; the second preheater of the second separation treatment line is communicated with the evaporator of the first separation treatment line.
2. The industrial brine resource utilization device according to claim 1, characterized in that: The gas outlet of the second preheater of the second separation treatment line is connected to the vacuum pump.
3. The industrial brine resource utilization device according to claim 1, characterized in that: The condensed water outlet of the heating chamber of the first separation treatment line is also connected to the preheater.
4. The industrial brine resource utilization device according to any one of claims 1 to 3, characterized in that: The working temperature in the evaporator is 100-120℃; the working temperature in the flash evaporator is 50-70℃.
5. The industrial brine resource utilization device according to any one of claims 1 to 3, characterized in that: The evaporator is a single-stage evaporator or a multi-stage evaporator; the flash evaporator is a multi-stage flash evaporator.
6. The industrial brine resource utilization device according to any one of claims 1 to 3, characterized in that: Compressor 2 can also be replaced by a heat pump.