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Process method and device for advanced treatment of coking biochemical wastewater by using coke powder

A technology of advanced treatment and process method, applied in chemical instruments and methods, multi-stage treatment of water/sewage, water/sludge/sewage treatment, etc. To achieve the effect of obvious filtering effect, strong adsorption capacity and small footprint

Inactive Publication Date: 2016-03-09
余柏林 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] 1. The amount of coke powder used is large. The paper mentions that the amount of coke powder used is 10% of the waste water. This is a very large amount. A coking enterprise with an annual output of 1 million tons discharges about 1,500 tons of waste water every day. According to This calculation requires 150 tons of coke powder, and the coke powder output of coking enterprises for wastewater filtration treatment is about 1% of the coke output (dust removal coke powder is not suitable for filtration treatment because the particle size is too small and the filtration speed is too slow). That is, about 30 tons, which is too far from the required amount of coke powder
[0007] 2. Coke powder in and out of the filter equipment cannot be mechanized, it is completely intermittently added and discharged, and the amount of labor and labor intensity are extremely large
[0008] 3. The requirements for the area of ​​the filter material due to the problem of filtration speed are not considered. If the recommended method is used, the number of filters required is also a large number. Not only the equipment cost is high, the floor area is large, but also the on-site placement is difficult to solve The problem

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  • Process method and device for advanced treatment of coking biochemical wastewater by using coke powder
  • Process method and device for advanced treatment of coking biochemical wastewater by using coke powder
  • Process method and device for advanced treatment of coking biochemical wastewater by using coke powder

Examples

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Effect test

Embodiment 1

[0034] Taking the treatment of wastewater in the coking production process of a coking plant as an example, the coking plant discharges about 100 tons of wastewater per hour. After testing, the COD of the wastewater is 386mg / L, and the volatile phenol is 0.96mg / L. According to the initial COD and volatile phenol values ​​of the wastewater and the hourly discharge, it is determined to build 3 premixing tanks and inclined plate sedimentation tanks, and the treatment capacity of each inclined plate sedimentation tank is 100t / hour.

[0035] The specific processing steps are as follows: see figure 1 As shown in , three premixing tanks are set up, namely No. 1 premixing tank I, No. 2 premixing tank II and No. 3 premixing tank III, and the lower part of each premixing tank is respectively equipped with No. 1 inclined plate sedimentation tank IV , No. 2 inclined plate sedimentation tank V and No. 3 inclined plate sedimentation tank VI; the outlet pipe at the bottom of each premixing t...

Embodiment 2

[0039] Take the treatment of coking wastewater in the coking production process of a coking plant as an example. The coking plant discharges about 100 tons of wastewater per hour. Due to the unstable production process, the COD of the wastewater is 430mg / L and the volatile phenol is 1.6mg / L. According to the initial COD and volatile phenol values ​​of the wastewater and the hourly discharge, the 3 premixing tanks and inclined plate sedimentation tanks used in Example 1 are still used, and the treatment capacity of each inclined plate sedimentation tank is 100t / hour.

[0040] The specific treatment process is the same as in Example 1, but the wastewater is treated through the above-mentioned 3-stage premixing tank and inclined plate sedimentation tank. After testing, the COD of the effluent is 98 mg / L, and the volatile phenol is 0.43 mg / L, which does not meet the requirements of GB16171-2012. , at this time, it is necessary to enable the standpipe type automatic feeding and disc...

Embodiment 3

[0042] Taking the treatment of coking wastewater in the coking production process of a coking plant as an example, the coking plant discharges about 100 tons of wastewater per hour. After testing, the COD of the wastewater is 356mg / L, and the volatile phenol is 0.92mg / L. According to the initial COD and volatile phenol values ​​of the wastewater and the hourly discharge, it is determined to build 3 premixing tanks and inclined plate sedimentation tanks, and the treatment capacity of each inclined plate sedimentation tank is 100t / hour.

[0043] The specific treatment process is the same as in Example 1. The wastewater in this example is treated through the above-mentioned 3-stage premixing tank and inclined plate sedimentation tank. After testing, the COD of the effluent is 63 mg / L, and the volatile phenol is 0.15 mg / L, which is in line with GB16171- According to the regulations in 2012, it can be directly discharged or converted to industrial water. In this embodiment, the set...

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Abstract

The invention discloses a technical method and a device for deeply treating coking biochemical wastewater through coke powder. The method comprises the steps of firstly coke powder with the particle size being smaller than 0.2 millimeters and a flocculant are added into coking biochemical wastewater, the coking biochemical wastewater is stirred and mixed in a premixing tank, organic matters are effectively absorbed by the fine particle coke powder, a large particle size precipitate is formed under the effect of the flocculant, and the precipitate enters a sloping plate sedimentation basin, so as to be subjected to precipitation separation; water treated is drained away from the upper part of the sedimentation basin, floccule is sunk into a collecting bucket at the bottom, and generally 2 to 5 levels of circulating adsorption and precipitation are designed, so that the COD (chemical oxygen demand) of treated wastewater is lower than 80mg / L, volatile phenol is lower than 0.3mg / L, and requirements of GB16171-2012 are met; when the requirements can not be met after the 2 to 5 levels of circulating adsorption and precipitation are performed, a vertical pipe automatic charging and discharging filter is also arranged at the rear part of the device, coke powder with the particle size being smaller than 3millimeters absorbs and filters the wastewater again, and drained water completely meets requirements of discharge or industrial water. The method and the device have the characteristics of being simple in technology, low in material consumption and cost, small in occupied area, energy-saving, environment-friendly, low in labor intensity, capability of continuously producing and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a process method and a device for advanced treatment of coking biochemical wastewater by using coke powder. Background technique [0002] At present, the ammonia distillation wastewater in the coking production process has a COD value of 200-500 mg / L after biochemical treatment, and a volatile phenol range of 0.5-1.0, which cannot meet the national emission standards. According to the regulations of GB16171-2012, starting from 2015, the COD of wastewater discharged from coking enterprises shall not exceed 80mg / L, and the volatile phenols shall not exceed 0.3mg / L, and the discharge of wastewater per ton of coke has also been strictly limited, thus eliminating Diluted with water to meet discharge standards. [0003] In order to make the discharged wastewater meet the standard, various coking enterprises often use enhanced oxidant for advanced treatment, and have achieved...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F9/04
Inventor 余柏林段元兴
Owner 余柏林
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