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Slack coal pressure gasification wastewater recycling treatment method and treatment system as well as application

A technology for pressurized gasification and treatment of crushed coal, which is applied in the fields of oxidized water/sewage treatment, chemical instruments and methods, and reduced water/sewage treatment, etc. and other problems to achieve the effect of prolonging service life, high membrane flux, and strengthening biochemical treatment capacity

Inactive Publication Date: 2014-09-03
DATANG INT CHEM TECH RESINST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used wastewater reuse treatment technologies include electrochemical precipitation, advanced oxidation, membrane separation, and adsorption methods. Among them, membrane separation technology has become the current preferred reuse treatment technology because of its high separation efficiency, stable operation, and low operating costs. , but because the crushed coal pressurized gasification wastewater still contains a relatively high concentration of organic matter (COD cr About 200mg / L), and it is a macromolecule (mainly benzene ring substance) refractory organic matter, directly using membrane separation technology has defects such as serious membrane pollution, difficult backwashing, and rapid rise in operating pressure difference

Method used

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  • Slack coal pressure gasification wastewater recycling treatment method and treatment system as well as application
  • Slack coal pressure gasification wastewater recycling treatment method and treatment system as well as application
  • Slack coal pressure gasification wastewater recycling treatment method and treatment system as well as application

Examples

Experimental program
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Effect test

Embodiment 1

[0035] This embodiment is used to illustrate the waste water recycling treatment method and treatment system of the crushed coal pressurized gasification of the present invention.

[0036] Such as figure 1 The shown crushed coal pressurized gasification waste water reuse treatment system includes a coagulation sedimentation unit, a chemical catalysis unit, a membrane biological reaction unit and a reverse osmosis unit connected in sequence. In actual construction, existing equipment and technologies with the above functions can be selected. For example, the coagulation-sedimentation unit can be a coagulation-sedimentation tank, the chemical catalysis unit can be a chemical catalysis reaction tank, and the membrane bioreaction unit can be a membrane bioreaction device (MBR), etc. The above-mentioned equipment and structures can be connected sequentially through pipelines.

[0037] The chemical catalytic unit can be equipped with an exhaust gas absorption device, which is fill...

Embodiment 2

[0080] This example is used to illustrate the present invention's screening of ozone dosage.

[0081] The inventors found that the dosage of ozone can affect the treatment effect of wastewater. Therefore, the inventors studied the influence of different dosages of ozone on the process results. The operation steps and other parameters of this embodiment are basically the same as those of Embodiment 1, the difference is the dosage of ozone in the chemical catalytic unit. The test data are shown in Table 1 below.

[0082] Table 1 The effect of the dosage of ozone on the effect of wastewater treatment

[0083]

[0084] Note:

[0085] *: Process operating conditions: stop when running for 7 minutes, and air exposure for 2 minutes;

[0086] **: Process operating conditions: stop when running for 9 minutes, air exposure for 2 minutes;

[0087] ***: Ultrasound is added on the basis of ozone dosage of 50mg / L; ultrasonic treatment is added (ultrasonic frequency: 25~35kHz)

[00...

Embodiment 3

[0090] This example is used to illustrate the screening of microorganisms in the membrane bioreaction according to the present invention.

[0091]The inventors also studied the influence of microorganisms in the membrane bioreaction on the treatment effect. Similarly, the operating steps and other parameters of this embodiment are basically the same as those of Embodiment 1, except that the microbial strains that degrade phenol are introduced into the MBR. The test data are shown in Table 2 below.

[0092] Table 2 Effect of microorganisms on wastewater treatment effect

[0093]

[0094] Note:

[0095] *: Stop running when running for 7 minutes, and air exposure for 2 minutes;

[0096] **: When running for 9 minutes, it needs to stop running, and air exposure for 2 minutes;

[0097] 1: Introduce phenol-degrading microbial strain UW7 strain of phenol-degrading bacteria;

[0098] 2: On the basis of ozone dosage of 50mg / L and ultrasonic wave (frequency 25-35kHz), introduce...

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Abstract

The invention provides a slack coal pressure gasification wastewater recycling treatment method and treatment system as well as application. The treatment method sequentially comprises the following steps of: (1) performing coagulating sedimentation on the wastewater to obtain wastewater after the coagulating sedimentation treatment; (2) performing chemical catalysis on the wastewater obtained by the step (1) to obtain wastewater after the catalytic oxidation treatment; (3) performing membrane bioreaction on the wastewater obtained by the step (2) to obtain wastewater after the membrane bioreaction treatment; and (4) performing reverse osmosis on the wastewater obtained by the step (3) to obtain recycling water.

Description

technical field [0001] The present invention relates to a wastewater treatment method and treatment system, in particular to a method for recycling waste water from pressurized gasification of crushed coal, and a system and system for recycling waste water from pressurized gasification of crushed coal used in the method The method or the application of the system in treating waste water from pressurized gasification of pulverized coal. Background technique [0002] Crushed coal pressurized gasification wastewater is the coal gasification wastewater produced during the process of crushed coal pressurized gasification. The wastewater contains a large amount of ammonia nitrogen, phenolic substances, oily substances, cyanides, single-ring aromatic hydrocarbons and polycyclic aromatic hydrocarbons, and heterocyclic compounds containing nitrogen, sulfur, and oxygen, among which COD cr (referring to the use of potassium dichromate (K 2 Cr 2 O7) As an oxidizing agent, the concent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/52C02F1/78C02F1/44C02F1/36C02F5/00C02F1/70C02F1/50B01D53/02
Inventor 安洪光李春启岳子明刘俊峰梅长松宋学平赵荧李国胜王金惠
Owner DATANG INT CHEM TECH RESINST
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