Continuous evaporation device for wastewater containing high-salt and low-boiling-point organic matters

Abstract

The utility model belongs to the technical field of chemical product recovery equipment, and discloses a continuous evaporation device for wastewater containing high-salt and low-boiling-point organic matters, which comprises a feeding device, a continuous steam stripping device, a continuous evaporation device and a treatment and recovery device which are connected through material pipelines, the feeding device comprises a wastewater storage tank and a wastewater preheater; the continuous steam stripping device comprises a steam stripping tower, a condenser and a low-boiling-point organic matter temporary storage tank; the continuous evaporation device comprises an evaporation kettle and a condenser; and the treatment and recovery device comprises an evaporation receiving tank, a material transfer pump and a vacuum pump. The whole process is continuously carried out, the reaction time is shortened, the separation of low-boiling-point organic matters, salt and water is ensured, and the recovery rate of the low-boiling-point organic matters is high.

Description

TECHNICAL FIELD

[0001] The utility model belongs to chemical product recovery equipment technical field, concretely relates to a kind of for containing high salt, low boiling point organic matter's wastewater continuous evaporation device. BACKGROUND

[0002] High-salinity wastewater refers to wastewater containing at least 3.5wt% of salt, mainly from chemical plants and oil and gas production and processing industries. This kind of wastewater contains a variety of substances, including salt, oil, organic heavy metals and radioactive substances, which pose a potential threat to the environment and ecological system. In addition to seawater desalination, concentrated liquid produced during chemical production and wastewater treatment processes is the main source of high-salinity wastewater. The total dissolved solids (TDS) of high-salinity wastewater directly generated during chemical production is greater than 15%, and it cannot be treated biologically, so the treatment of high-salinity wastewater has become an important issue in environmental protection.

[0003] Low-boiling-point organic matter refers to organic matter with a relatively low boiling point, commonly used as a solvent, raw material, etc. in organic production. Because it has a greater impact on the environment and low-boiling-point organic matter has recycling value, the recycling of low-boiling-point organic matter is also of great significance in environmental science and industrial applications.

[0004] Wastewater containing high salt and low boiling point organic matter is difficult to treat in industrial production. If it is directly discharged, it will cause serious harm to the environment. Therefore, a comprehensive treatment method is needed to treat and utilize wastewater with high salt content and high low boiling point organic matter content, to achieve efficient and economical wastewater treatment, which is of great significance in environmental protection, industrial production and energy saving and emission reduction. SUMMARY

[0005] The utility model provides a kind of for containing high salt, low boiling point organic matter's wastewater continuous evaporation device for above-mentioned problems, the device makes the whole process continuous, shortens reaction time, guarantees the separation of low boiling point organic matter, salt and water, and low boiling point organic matter recovery rate is high.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: a kind of for containing high salt, low boiling point organic matter's wastewater continuous evaporation device, including feeding device, continuous stripping device, continuous evaporation device, processing and recycling device, each device is connected by material pipeline;

[0007] The feeding device includes a wastewater storage tank and a wastewater preheater. The wastewater storage tank is provided with a wastewater storage tank discharge port at the bottom. The wastewater preheater is provided with a wastewater preheater feed port at the top and a wastewater preheater discharge port at the bottom. The wastewater storage tank discharge port is connected to the wastewater preheater feed port through a wastewater feed line.

[0008] The continuous stripping device comprises a stripping tower, a condenser and a low-boiling organic matter temporary storage tank, and the stripping tower, the condenser and the low-boiling organic matter temporary storage tank are sequentially connected through a material pipeline; the left upper portion of the stripping tower is provided with a stripping tower feed port, the right upper portion is provided with a stripping tower first-stage discharge port, and the bottom is provided with a stripping tower second-stage discharge port; the upper portion of the condenser is provided with a condenser feed port, and the bottom is provided with a condenser discharge port; the stripping tower feed port is connected with the wastewater preheater discharge port through a pipeline; the stripping tower first-stage discharge port is connected with the condenser feed port through a pipeline; and the condenser discharge port is connected with the low-boiling organic matter temporary storage tank feed port through a pipeline.

[0009] The continuous evaporation device comprises an evaporation kettle and a condenser; the left top of the evaporation kettle is provided with an evaporation kettle feed port, and the right top is provided with an evaporation kettle first-stage discharge port; the top of the condenser is provided with a condenser feed port, and the bottom is provided with a condenser discharge port; the stripping tower second-stage discharge port is connected with the evaporation kettle feed port through a material pipeline; and the evaporation kettle first-stage discharge port is connected with the condenser feed port.

[0010] The treatment and recovery device comprises an evaporation receiving tank, a material transfer pump and a vacuum pump; the bottom of the evaporation receiving tank is provided with an evaporation receiving tank feed port, the top is provided with an evaporation receiving tank second-stage discharge port, and the right lower portion is provided with an evaporation receiving tank first-stage discharge port; the top of the vacuum pump is provided with a vacuum pump air inlet; the evaporation receiving tank feed port is connected with the condenser discharge port of the continuous evaporation device; the evaporation receiving tank second-stage discharge port is connected with the vacuum pump air inlet; and the evaporation receiving tank first-stage discharge port is connected with the material transfer pump.

[0011] Further, a control valve is arranged on the wastewater feed pipeline.

[0012] Further, the left side of the wastewater preheater is provided with a wastewater preheater heating medium discharge port and a wastewater preheater heating medium feed port.

[0013] Further, two-stage insulation jackets are arranged on the stripping tower, the upper portion of the stripping tower is a first-stage insulation jacket, and the lower portion is a second-stage insulation jacket.

[0014] Further, a cooling medium feed port is arranged on the right bottom of the condenser, and a cooling medium discharge port is arranged on the right upper portion.

[0015] Further, an insulation jacket is arranged on the evaporation kettle, a liquid level meter is further arranged on the left top of the evaporation kettle, the bottom is provided with an evaporation kettle second-stage discharge port, and an upward-expanding discharge valve is arranged on the pipeline connected with the evaporation kettle second-stage discharge port.

[0016] Further, a heating medium feed port is arranged on the upper portion of the insulation jacket, and a heating medium discharge port is arranged on the lower portion.

[0017] Further, the liquid level meter arranged on the evaporation kettle is interlocked with the evaporation kettle heating medium feeding port, and the evaporation kettle heating medium discharging port is connected with the waste water preheater heating medium feeding port through a steam pipeline;

[0018] Further, the left side of the evaporation receiving tank is provided with a liquid level meter, and the liquid level meter is interlocked with the material transfer pump;

[0019] Further, the bottom of the low-boiling-point organic matter temporary storage tank is provided with a low-boiling-point organic matter temporary storage tank feeding port.

[0020] Compared with the prior art, the utility model has the following advantages:

[0021] 1) the continuous stripping and evaporation device of the utility model can greatly improve the heat utilization rate of the waste water after stripping, on the other hand, the evaporation device steam condensate water supplies heat to the heat exchanger, and the heat utilization rate is further improved, and the heat source is greatly utilized;

[0022] 2) the continuous stripping device of the utility model can recover low-boiling-point organic matter to a great extent while treating the salt in the waste water, so that the low-boiling-point organic matter can be used again in other parts, the resource utilization rate can be improved, and the artificial cost can be reduced. DETAILED DESCRIPTION

[0023] Figure 1 It is a kind of continuous evaporation device structure schematic diagram for waste water containing high salt, low-boiling-point organic matter of the utility model.

[0024] 1 - wastewater storage tank, 11 - wastewater storage tank discharge port, 12 - control valve, 13 - wastewater feed line, 2 - wastewater preheater, 21 - wastewater preheater feed port, 22 - wastewater preheater discharge port, 23 - wastewater preheater heating medium discharge port, 24 - wastewater preheater heating medium feed port, 3 - stripping column, 31 - stripping column feed port, 32 - stripping column first stage discharge port, 33 - stripping column second stage discharge port, 34 - stripping column first stage insulation jacket, 341 - stripping column first stage heating medium feed port, 342 - stripping column first stage heating medium discharge port, 35 - stripping column second stage insulation jacket, 351 - stripping column second stage heating medium feed port, 352 - stripping column second stage heating medium discharge port, 4 - condenser a, 41 - condenser a feed port, 42 - condenser a discharge port, 43 - cooling medium discharge port a, 44 - cooling medium feed port a, 5 - low-boiling-point organic matter temporary storage tank, 51 - low-boiling-point organic matter temporary storage tank feed port, 52 - low-boiling-point organic matter temporary storage tank discharge port, 6 - evaporation kettle, 61 - evaporation kettle feed port, 62 - evaporation kettle first stage discharge port, 63 - evaporation kettle second stage discharge port, 64 - upward unloading valve, 65 - level gauge a, 66 - evaporation kettle insulation jacket, 661 - evaporation kettle heating medium feed port, 662 - evaporation kettle heating medium discharge port, 67 - steam pipe, 7 - condenser b, 71 - condenser b feed port, 72 - condenser b discharge port, 73 - cooling medium discharge port b, 74 - cooling medium feed port b, 8 - evaporation receiving tank, 81 - evaporation receiving tank feed port, 82 - evaporation receiving tank first stage discharge port, 83 - evaporation receiving tank second stage discharge port, 84 - transfer pump, 85 - level gauge b, 9 - vacuum pump, 91 - vacuum pump air inlet. DETAILED DESCRIPTION

[0025] The utility model will be explained and described further in combination with the drawings and specific embodiment, the following description is only for helping the person skilled in the art better understand the utility model, and does not limit its protection scope.

[0026] As shown in Figure 1 A kind of continuous evaporation device for salt, low-boiling-point organic matter content high wastewater, including feeding device, continuous stripping device, continuous evaporation device, processing and recovery device, the described each device is connected by material pipeline;

[0027] The feeding device comprises a wastewater storage tank 1 and a wastewater preheater 2; the bottom of the wastewater storage tank 1 is provided with a wastewater storage tank discharge port 11; the top of the wastewater preheater 2 is provided with a wastewater preheater feeding port 21, and the bottom is provided with a wastewater preheater discharge port 22; the wastewater storage tank discharge port 11 is connected with the wastewater preheater feeding port 21 through a wastewater feeding pipeline 13; the wastewater feeding pipeline 13 is provided with a control valve 12 for controlling opening and closing and adjusting flow; the left side of the wastewater preheater 2 is provided with a wastewater preheater heating medium discharge port 23 and a wastewater preheater heating medium feeding port 24;

[0028] The continuous stripping device comprises a stripping tower 3, a condenser a 4 and a low-boiling-point organic matter temporary storage tank 5, which are sequentially connected through material pipelines; the left upper side of the stripping tower 3 is provided with a stripping tower feeding port 31, the right upper side is provided with a stripping tower first-stage discharge port 32, and the bottom is provided with a stripping tower second-stage discharge port 33; the upper side of the condenser a 4 is provided with a condenser a feeding port 41, and the bottom is provided with a condenser a discharge port 42; the stripping tower feeding port 31 is connected with the wastewater preheater discharge port 22 through a pipeline; the stripping tower first-stage discharge port 32 is connected with the condenser a feeding port 41 through a pipeline; the condenser a discharge port 42 is connected with the low-boiling-point organic matter temporary storage tank feeding port 51 through a pipeline; the stripping tower 3 is provided with two-stage insulation jackets, the upper part of the stripping tower is a stripping tower first-stage insulation jacket 34, and the lower part is a stripping tower second-stage insulation jacket 35; the stripping tower first-stage insulation jacket 34 and the stripping tower second-stage insulation jacket 35 are respectively provided with a stripping tower first-stage heating medium feeding port 341 and a stripping tower second-stage heating medium feeding port 351 on the upper part, and are respectively provided with a stripping tower first-stage heating medium discharge port 342 and a stripping tower second-stage heating medium discharge port 352 on the lower part; the bottom of the low-boiling-point organic matter temporary storage tank 5 is provided with a low-boiling-point organic matter temporary storage tank feeding port 51.

[0029] The continuous evaporation device comprises an evaporation kettle 6 and a condenser b 7; the evaporation kettle 6 is provided with an evaporation kettle feeding port 61 on the left side of the top and an evaporation kettle first-stage discharging port 62 on the right side of the top; the condenser b 7 is provided with a condenser b feeding port 71 on the top and a condenser b discharging port 72 on the bottom; the second-stage discharging port 33 of the stripping tower is connected with the evaporation kettle feeding port 61 through a material pipeline; the evaporation kettle first-stage discharging port 62 is connected with the condenser b feeding port 71; the evaporation kettle 6 is provided with an evaporation kettle heat preservation jacket 66; the evaporation kettle heat preservation jacket 66 is provided with an evaporation kettle heating medium feeding port 661 on the upper portion and an evaporation kettle heating medium discharging port 662 on the lower portion; the evaporation kettle 6 is further provided with a liquid level meter a 65 on the top of the left side and an evaporation kettle second-stage discharging port 63 on the bottom; the pipeline connected with the evaporation kettle second-stage discharging port 63 is provided with an up-and-down type discharging valve 64; the liquid level meter a 65 provided on the evaporation kettle is connected with the evaporation kettle heating medium feeding port 661; and the evaporation kettle heating medium discharging port 662 is connected with the heating medium feeding port 24 of the waste water preheater through a steam pipeline 67.

[0030] The treatment and recovery device comprises an evaporation receiving tank 8, a material transfer pump 84 and a vacuum pump 9; the evaporation receiving tank 8 is provided with an evaporation receiving tank feeding port 81 on the bottom, an evaporation receiving tank second-stage discharging port 83 on the top and an evaporation receiving tank first-stage discharging port 82 on the right lower portion; the vacuum pump 9 is provided with a vacuum pump air inlet 91 on the top; the evaporation receiving tank feeding port 81 is connected with the condenser b discharging port 72; the evaporation receiving tank second-stage discharging port 83 is connected with the vacuum pump air inlet 91; the evaporation receiving tank first-stage discharging port 82 is connected with the material transfer pump 84; the evaporation receiving tank 8 is provided with a liquid level meter b 85 on the left side; and the liquid level meter 85 is connected with the material transfer pump 84.

[0031] The right lower portions of the condenser a 4 and the condenser b 7 are respectively provided with a cooling medium feeding port a 44 and a cooling medium feeding port b 74; and the right upper portions of the condenser a 4 and the condenser b 7 are respectively provided with a cooling medium discharging port a 44 and a cooling medium discharging port b 74.

[0032] Embodiment 1: The application is used for treating waste water containing high salt and low boiling point organic matters

[0033] The waste water containing high salt and low boiling point organic matters is stored in the waste water storage tank 1; the control valve 12 on the waste water feeding pipeline 13 is opened; the waste water flows into the waste water preheater 2 through the waste water storage tank discharging port 11 and the waste water preheater feeding port 21 for preheating treatment; the left side of the waste water preheater 2 is provided with a waste water preheater heating medium discharging port 23 and a waste water preheater heating medium feeding port 24; the corresponding heating medium is introduced through the waste water preheater heating medium discharging port 23 to maintain the preheating temperature of the waste water preheater 2.

[0034] The preheated wastewater enters the stripping tower 3 through the stripping tower feed port 31 for recovering the front fraction, and the gaseous material of the wastewater enters the condenser a 4 through the stripping tower first-stage discharge port 32 and the condenser a feed port 41 for cooling treatment; the liquid phase of the wastewater enters the evaporation kettle 6 through the stripping tower second-stage discharge port 33 and the evaporation kettle feed port 61 for evaporation reaction. The stripping tower 3 is provided with two-stage insulation jackets, the upper part of the stripping tower is a stripping tower first-stage insulation jacket 34, and the lower part is a stripping tower second-stage insulation jacket 35; the stripping tower first-stage insulation jacket 34 and the stripping tower second-stage insulation jacket 35 are respectively provided with a stripping tower first-stage heating medium feed port 341, a stripping tower second-stage heating medium feed port 351 at the upper part and a stripping tower first-stage heating medium discharge port 342, a stripping tower second-stage heating medium discharge port 352 at the lower part; the corresponding heating medium is introduced through the stripping tower first-stage heating medium feed port 341 and the stripping tower second-stage heating medium feed port 351 to control the reaction temperature in the stripping tower 3.

[0035] The gaseous material cooled by the condenser a 4 is sequentially stored in the low-boiling-point organic matter temporary storage tank 5 through the condenser a discharge port 42 and the low-boiling-point organic matter temporary storage tank feed port 51. The right bottom of the condenser a 4 is provided with a cooling medium feed port a 44, and the right upper part is provided with a cooling medium discharge port a 43; the corresponding cooling medium is introduced through the cooling medium feed port a 44 to maintain the cooling temperature in the condenser a 4.

[0036] The evaporation kettle 6 is provided with an evaporation kettle insulation jacket 66; the upper part of the evaporation kettle insulation jacket 66 is provided with an evaporation kettle heating medium feed port 661, and the lower part is provided with an evaporation kettle heating discharge port 662; the corresponding heating medium is introduced through the evaporation kettle heating medium feed port 661 to maintain the reaction temperature of the evaporation kettle 6. After evaporation, the waste material in the evaporation kettle 6 enters the condenser b 7 through the evaporation kettle first-stage discharge port 62 and the condenser b feed port 71. The salt obtained after evaporation is discharged through the evaporation kettle second-stage discharge port 63 controlled by the upper expansion type discharge valve 64. The evaporation kettle heating medium discharge port 662 is connected with the wastewater preheater heating medium feed port 24 through the steam pipeline 67, and the heating medium output by the evaporation kettle heating medium discharge port 662 enters the wastewater preheater 2 through the steam pipeline 67 and the wastewater preheater heating medium feed port 24, realizing the recycling of the heating medium. The left top of the evaporation kettle 6 is also provided with a liquid level meter a 65 for detecting the liquid level of the evaporation kettle 6, and the liquid level of the liquid level meter a 65 can interlock the opening degree of the evaporation kettle heating medium feed port 661 of the evaporation kettle 6, so as to control the evaporation speed of the evaporation kettle 6.

[0037] The right bottom of the condenser b 7 is provided with a cooling medium inlet b 74, and the right upper part is provided with a cooling medium outlet b 73; the corresponding cooling medium is introduced through the cooling medium inlet b 74 to maintain the cooling temperature in the condenser b 7. The waste water cooled by the condenser b 7 enters the evaporation receiving tank 8 through the bottom of the condenser b outlet 72 and the evaporation receiving tank inlet 81, the top of the evaporation receiving tank 8 is provided with an evaporation receiving tank secondary outlet 83, and the right lower part is provided with an evaporation receiving tank primary outlet 82; the evaporation receiving tank secondary outlet 83 is connected with the vacuum pump air inlet 91, and the evaporation receiving tank 8 is in a negative pressure state through the vacuum pump 9; the evaporation receiving tank primary outlet 82 is connected with the transfer pump 84, and the evaporation receiving tank 8 is provided with a liquid level meter b 85, and the liquid level meter b 85 is interlocked with the transfer pump 84, when the liquid level meter b 85 of the evaporation receiving tank 8 reaches a certain value, the transfer pump 84 is automatically started and stopped, and the fraction material received from the condenser b 7 is transported out.

[0038] The above examples are only for illustrating the present application, and are not limited to the present application. Those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. All equivalent technical solutions should belong to the protection scope of the present application, and the protection scope of the present application is defined by the claims.

Claims

1. A continuous evaporation apparatus for high-salt, low-boiling organic-containing wastewater, characterized by, It comprises a feeding device, a continuous stripping device, a continuous evaporation device, a treatment and recovery device, and the devices are connected through material pipelines. The feeding device comprises a wastewater storage tank and a wastewater preheater; the bottom of the wastewater storage tank is provided with a wastewater storage tank outlet; the top of the wastewater preheater is provided with a wastewater preheater inlet, and the bottom is provided with a wastewater preheater outlet; the wastewater storage tank outlet and the wastewater preheater inlet are connected through a wastewater feeding pipeline. The continuous stripping device comprises a stripping tower, a condenser and a low-boiling-point organic matter temporary storage tank; the stripping tower, the condenser and the low-boiling-point organic matter temporary storage tank are connected in sequence through material pipelines; the left upper part of the stripping tower is provided with a stripping tower inlet, the right upper part is provided with a stripping tower first-stage outlet, and the bottom is provided with a stripping tower second-stage outlet; the upper part of the condenser is provided with a condenser inlet, and the bottom is provided with a condenser outlet; the stripping tower inlet and the wastewater preheater outlet are connected through a pipeline; the stripping tower first-stage outlet is connected with the condenser inlet through a pipeline; the condenser outlet is connected with the low-boiling-point organic matter temporary storage tank inlet through a pipeline. The continuous evaporation device comprises an evaporation kettle and a condenser; the top left side of the evaporation kettle is provided with an evaporation kettle inlet, and the top right side is provided with an evaporation kettle first-stage outlet; the top of the condenser is provided with a condenser inlet, and the bottom is provided with a condenser outlet; the stripping tower second-stage outlet is connected with the evaporation kettle inlet through a material pipeline; the evaporation kettle first-stage outlet is connected with the condenser inlet. The treatment and recovery device comprises an evaporation receiving tank, a material transfer pump and a vacuum pump; the bottom of the evaporation receiving tank is provided with an evaporation receiving tank inlet, the top is provided with an evaporation receiving tank second-stage outlet, and the right lower part is provided with an evaporation receiving tank first-stage outlet; the top of the vacuum pump is provided with a vacuum pump air inlet; the evaporation receiving tank inlet is connected with the condenser outlet of the continuous evaporation device; the evaporation receiving tank second-stage outlet is connected with the vacuum pump air inlet; the evaporation receiving tank first-stage outlet is connected with the material transfer pump.

2. The continuous evaporation apparatus according to claim 1, characterized in that A control valve is arranged on the wastewater feeding pipeline.

3. The continuous vaporization device of claim 1, wherein, The left side of the wastewater preheater is provided with a wastewater preheater heating medium outlet and a wastewater preheater heating medium inlet.

4. The continuous vaporization device of claim 1, wherein, Two-stage insulation jackets are arranged on the stripping tower; the upper part of the stripping tower is a first-stage insulation jacket, and the lower part is a second-stage insulation jacket.

5. The continuous vaporization device of claim 1, wherein, The right bottom of the condenser is provided with a cooling medium inlet, and the right upper part is provided with a cooling medium outlet.

6. The continuous vaporization device of claim 1, wherein, An insulation jacket is arranged on the evaporation kettle; a liquid level meter is further arranged on the left top of the evaporation kettle, and the bottom is provided with an evaporation kettle second-stage outlet; an up-and-down type discharge valve is arranged on the pipeline connected with the evaporation kettle second-stage outlet.

7. The continuous vaporization device according to any one of claims 4 or 6, wherein A heating medium inlet is arranged on the upper part of the insulation jacket, and a heating medium outlet is arranged on the lower part.

8. The continuous vaporization device of claim 1, wherein, The liquid level meter arranged on the evaporation kettle is connected with the evaporation kettle heating medium inlet; the evaporation kettle heating medium outlet is connected with the wastewater preheater heating medium inlet through a steam pipeline.

9. The continuous vaporization device of claim 1, wherein, A liquid level meter is arranged on the left side of the evaporation receiving tank; the liquid level meter is connected with the material transfer pump.

10. The continuous vaporization device of claim 1, wherein, The low-boiling-point organic temporary storage tank is provided with a low-boiling-point organic temporary storage tank feed inlet at the bottom.

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