Efficient hardness removal device for high-concentration industrial waste liquid treatment and method thereof

An industrial waste liquid, high-efficiency technology, applied in mining wastewater treatment, water softening, etc., can solve the problems of high chemical cost, high equipment investment cost, affecting the efficiency of advanced treatment, etc. Construction investment and construction area, the effect of reducing the dosage of chemicals

Pending Publication Date: 2020-08-04
INNER MONGOLIA HENGSHENG ENVIRONMENTAL PROTECTION TECH ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For industrial waste liquid with high hardness content, if the hard removal treatment is not carried out in the early stage, it will seriously affect the efficiency of subsequent advanced treatment and affect the stable operation of subsequent equipment
At present, the conventional water treatment hard removal device is to install a multi-stage sedimentation tank, and a stirring device and a mud scraper are installed in the sedimentation tank.
[0003] Take the treatment of fracturing flowback fluid as an example. The fracturing flowback fluid is a high-concentration industrial waste liquid produced during the exploitation of oil and gas fields. It has complex components and contains a variety of toxic and harmful chemicals. Direct discharge will cause serious pollution of groundwater and soil. Cause irreversible environmental hazards, need to do centralized and harmless treatment
After the fracturing flowback fluid is pretreated by advanced catalytic oxidation, the total amount of calcium and magnesium in the effluent reaches about 4500mg / L, which is easy to generate CaCO 3 , CaSO 4 , MgCO 3 If there is no hard removal treatment, the technical indicators of advanced treatment cannot be met, which will directly affect the stable operation of the back-end biochemical treatment, ultrafiltration (UF) treatment, reverse osmosis (RO) treatment, and MVR evaporation and condensation systems. Causes low water production in the system, and increases the cleaning cycle and service life of the equipment

Method used

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  • Efficient hardness removal device for high-concentration industrial waste liquid treatment and method thereof
  • Efficient hardness removal device for high-concentration industrial waste liquid treatment and method thereof
  • Efficient hardness removal device for high-concentration industrial waste liquid treatment and method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1: as figure 1 As shown, a high-efficiency hard removal device for high-concentration industrial waste liquid treatment includes a water inlet pipeline mixer 1, a drug dosing device 2, an outlet water pipeline mixer 3 and a first-stage settling separation tank 4; wherein, the drug dosing device 2 Including hydrochloric acid dosing tank 2-1, sodium carbonate dosing tank 2-2 and sodium hydroxide dosing tank 2-3, the outlet of sodium carbonate dosing tank 2-2 and the outlet of sodium hydroxide dosing tank 2-3 Both are connected to the dosing port of the water inlet pipeline mixer 1 through pipelines;

[0031]The primary settling separation tank 4 includes a primary tank body 4-1, the upper part of the primary tank body 4-1 is provided with an overflow water outlet 4-2, and the primary tank body 4-1 at the bottom of the overflow water outlet 4-2 is provided with There is a tank body water inlet 4-3, and the bottom of the first-level tank body 4-1 is provided wit...

Embodiment 2

[0036] Embodiment 2: as figure 2 As shown, a high-efficiency hard removal device for high-concentration industrial waste liquid treatment is different from Embodiment 1 in that it also includes a secondary sedimentation separation tank 7, and at the same time, the primary sedimentation separation tank is also provided with a return pipe 4 -10, the top of the primary tank 4-1 is provided with a tank body return port 4-11, and the return pipe 4-10 is located under the annular overflow tank 4-6, and the water inlet of the return pipe 4-10 is connected to the tank body The water return port 4-11 is connected, and the water outlet of the water return pipe 4-10 is placed in the central tube 4-5.

[0037] The secondary settling separation tank 7 includes a secondary tank body 7-1, the upper part of the secondary tank body 7-1 is provided with a secondary overflow water outlet 7-2, and the secondary tank body 7 at the bottom of the secondary overflow water outlet 7-2 -1 is provided ...

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Abstract

The invention discloses an efficient hardness removal device for high-concentration industrial waste liquid treatment and a method thereof. The hardness removal device comprises a water inlet pipelinemixer, a dosing device, a water outlet pipeline mixer and a primary settling separation tank. The hardness removal method comprises the following steps: pretreated high-hardness wastewater enters a central cylinder of a primary settling separation tank through a water inlet pipeline and a water inlet pipeline mixer; adding a medicament into the water inlet pipeline mixer, reacting, flowing into the central cylinder of the first-stage settling separation tank, and discharging settled substances into a sludge concentration tank through a sludge discharging machine for solid-liquid separation; flowing a supernatant into the annular overflow groove from the edge of the top of the annular overflow groove and then flowing into the water outlet pipeline mixer through the overflow water outlet ofthe primary settling separation tank. Compared with a traditional stirring and step-by-step sedimentation separation hardness removal device, the investment of conventional treatment equipment is nearly 7 times that of the device, the construction investment and the construction area are greatly reduced, the chemical adding amount is reduced, and the production cost is greatly reduced.

Description

Technical field: [0001] The invention relates to the field of high-concentration industrial waste liquid treatment, in particular to an efficient hard removal device and a hard removal method for high-concentration industrial waste liquid treatment. Background technique: [0002] For the industrial waste liquid with high hardness content, if it does not go through the hard removal treatment in the early stage, it will seriously affect the efficiency of subsequent advanced treatment and affect the stable operation of subsequent equipment. At present, the conventional water treatment and dehardening device is to install a multi-stage sedimentation tank, and a stirring device and a mud scraper are installed in the sedimentation tank. [0003] Taking the treatment of fracturing flowback fluid as an example, fracturing flowback fluid is a high-concentration industrial waste liquid produced during the exploitation of oil and gas fields. It has complex components and contains a var...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/02C02F103/10
CPCC02F5/02C02F2103/10
Inventor 李广平姚留栓刘世军王兆礼思志银乔占英
Owner INNER MONGOLIA HENGSHENG ENVIRONMENTAL PROTECTION TECH ENG CO LTD
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