Method for reducing consumption of new water in coking wastewater through system communication treatment

Abstract

The invention discloses a method for reducing the consumption of new water in coking wastewater by system communication treatment, which comprises the following steps: (1) communicating three biochemical systems by using pipelines to ensure that water from the systems can be conveyed mutually, and providing conveying energy at each conveying front end by using a fluid power device to convey the wastewater outwards; (2) when the secondary biochemical water quality is poor, part of incoming water can be sent to the tertiary biochemical water and the primary biochemical water for treatment, and when the tertiary biochemical water quality is poor, part of incoming water can be sent to the secondary biochemical water and the primary biochemical water for treatment; (3) raw water is introduced into another wastewater treatment system in the process of systematically culturing and domesticating the sludge, so that the load of the raw water is reduced, time is provided for systematically culturing and domesticating the sludge, and the amount and the quality of the raw water are reasonably balanced. The method is used for balancing the quality and quantity of incoming water among a plurality of coking sewage treatment systems, and is particularly used for effectively reducing the quantity of new water distributed by the systems under the condition that system indexes fluctuate due to the emergency situation that other systems stably operate and another system is in emergency.

Description

Technical Field

[0001] The invention belongs to the field of sports equipment, and in particular relates to a method for reducing the amount of new water used in coking wastewater by system interconnection treatment. Background Art

[0002] Baosteel Coal Coking Chemical Branch has three phenol-cyanide wastewater treatment systems, namely, the first, second and third biochemicals, all of which are designed with A / A / O processes. The third biochemical in the new area is mainly a sewage treatment system supporting the construction of 4 7-meter coke ovens and 160,000 cubic meters of coal gas system in the new system. The first and second biochemicals are mainly wastewater treatment systems supporting the construction of 4 6-meter coke ovens and 130,000 cubic meters of coal gas system in the old area. The composition of the wastewater they treat is very complex, belonging to industrial wastewater with high ammonia nitrogen, high organic pollutants and difficult to treat. The water in the coking wastewater system is complex in composition, contains a wide variety of pollutants, and is difficult to degrade. Some components are difficult to decompose in water and are not easy to degrade and purify, so it is quite difficult to treat. Among them, the biochemical part of the sewage treatment system requires uniform water quality, small fluctuations and less impact on the operating environment.

[0003] At present, the impact resistance of a single wastewater treatment system is limited. When faced with a long fluctuation in water inflow indicators or a serious over-standard situation, it is difficult to maintain uniform water quality. The drastic fluctuation of water inflow will cause a huge impact on the system, and a large number of microorganisms in the system will die, which will have a significant impact on the operation of the entire system and take a long time for the system to recover. Summary of the invention

[0004] The purpose of the present invention is to provide a method for reducing the amount of new water used in coking wastewater by interconnecting systems, which is used to balance the quality and quantity of incoming water among multiple coking wastewater treatment systems, especially when other systems are running stably and another system has an emergency causing system index fluctuations, which can effectively reduce the amount of new water allocated by the system.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention provides a method for reducing the amount of new water used in coking wastewater by system interconnection treatment, comprising:

[0007] (1) Use pipelines to connect the three biochemical systems to ensure that the water from the systems can be transported to each other, and use fluid power devices at each front end to provide transport energy to transport the wastewater out;

[0008] (2) When the water quality of the secondary biochemical system is not good, part of the incoming water can be sent to the tertiary biochemical system and the primary biochemical system for treatment. When the water quality of the tertiary biochemical system is not good, part of the incoming water can be sent to the secondary biochemical system and the primary biochemical system for treatment.

[0009] (3) During the process of cultivating and taming the sludge in the system, the raw water is introduced into another wastewater treatment system to reduce the raw water load, provide time for the cultivation and taming of the sludge in the system, and reasonably balance the raw water quantity and water quality.

[0010] Furthermore, the fluid power device is a centrifugal pump.

[0011] Furthermore, when the incoming water volume exceeds the system load, the acceptable amount of water is calculated and part of the high-concentration wastewater is sent out to stabilize the system.

[0012] Furthermore, the specific calculation formula is as follows:

[0013] Q 可送水量 =(Q1×X1-Q2×X2) / X3

[0014] Where: Q1 is the existing water volume of the receiving system;

[0015] X1 is the existing indicator of the acceptance system;

[0016] Q1 is the rated water volume of the receiving system;

[0017] X2 is the rated index of the receiving system;

[0018] X3 is the existing indicator of the delivery system.

[0019] Note: X is the main indicator parameter that exceeds the standard in the system.

[0020] Furthermore, at this stage, without investing large amounts of money in transformation, the system's operating capacity can be improved to a certain extent, with low operating and maintenance costs, the impact resistance of a single system can be enhanced, the utilization of space and system operating efficiency can be effectively improved, and the probability of environmental accidents can be reduced.

[0021] Compared with the prior art, the beneficial technical effects of the present invention are:

[0022] (1) The structure of the method is simple. At this stage, the system operation capacity can be improved to a certain extent without investing a large amount of transformation costs, and the operation and maintenance costs are low. The impact resistance of a single system can be improved, the utilization space and system operation efficiency can be effectively improved, and the probability of environmental accidents can be reduced.

[0023] (2) Reduce environmental fines due to excessive emissions; a single system reduces new water consumption by 20m 3 / h, saving operating costs. Even if the national environmental protection indicators are improved in the future, the amount of water treated by deep treatment can be reduced, which can greatly reduce the operating costs, and at the same time, the input of new water can be greatly reduced. The cost of reclaimed water can be saved by 1.02 yuan / ton × 20 tons / h × 24h × 365 days = 178,704 yuan per year. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 Schematic diagram of the use of pipelines to connect three biochemical systems. DETAILED DESCRIPTION

[0026] like Figure 1 As shown, a method for reducing the amount of new water used in coking wastewater by system interconnection treatment includes:

[0027] (1) Use pipelines to connect the three biochemical systems to ensure that the water from the systems can be transported to each other, and use fluid power devices at each front end to provide transport energy to transport the wastewater out;

[0028] (2) When the water quality of the secondary biochemical system is not good, part of the incoming water can be sent to the tertiary biochemical system and the primary biochemical system for treatment. When the water quality of the tertiary biochemical system is not good, part of the incoming water can be sent to the secondary biochemical system and the primary biochemical system for treatment.

[0029] (3) During the process of cultivating and taming the sludge in the system, the raw water load is effectively reduced by introducing the raw water into another wastewater treatment system, which provides time for the cultivation and taming of the sludge in the system and reasonably balances the raw water quantity and quality.

[0030] When the incoming water volume exceeds the system load, the acceptable amount of water is calculated and part of the high-concentration wastewater is sent out to stabilize the system.

[0031] Q 可送水量 =(Q1×X1-Q2×X2) / X3

[0032] Where: Q1 is the existing water volume of the receiving system;

[0033] X1 is the existing indicator of the acceptance system;

[0034] Q1 is the rated water volume of the receiving system;

[0035] X2 is the rated index of the receiving system;

[0036] X3 is the existing indicator of the delivery system.

[0037] Note: X is the main indicator parameter that exceeds the standard in the system.

[0038] The method of the present invention can improve the system operation capacity to a certain extent without investing large transformation costs at the current stage, and has low operation and maintenance costs, improves the impact resistance of a single system, effectively improves the utilization space and system operation efficiency, and reduces the probability of environmental accidents.

[0039] Reduce environmental fines due to excessive emissions, and reduce new water consumption by 20m3 per system3 / h, saving operating costs. Even if the national environmental protection indicators are improved in the future, the amount of water treated by deep treatment can be reduced, which can greatly reduce the operating costs, and at the same time, the input of new water can be greatly reduced. The cost of reclaimed water can be saved by 1.02 yuan / ton × 20 tons / h × 24h × 365 days = 178,704 yuan per year.

[0040] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for reducing the amount of new water used in coking wastewater by systematic interconnection treatment, characterized in that: include: (1) Use pipelines to connect the three biochemical systems to ensure that the water from the systems can be transported to each other, and use fluid power devices at each front end to provide transport energy to transport the wastewater out; (2) When the water quality of the secondary biochemical system is not good, part of the incoming water can be sent to the tertiary biochemical system and the primary biochemical system for treatment. When the water quality of the tertiary biochemical system is not good, part of the incoming water can be sent to the secondary biochemical system and the primary biochemical system for treatment. (3) During the process of cultivating and taming the sludge in the system, the raw water is introduced into another wastewater treatment system to reduce the raw water load, provide time for the cultivation and taming of the sludge in the system, and reasonably balance the raw water quantity and water quality.

2. The method for reducing the amount of new water used in coking wastewater by system interconnection treatment according to claim 1 is characterized in that: The fluid power device is a centrifugal pump.

3. The method for reducing the amount of new water used in coking wastewater by system interconnection treatment according to claim 1 is characterized in that: When the incoming water volume exceeds the system load, the acceptable amount of water is calculated and part of the high-concentration wastewater is sent out to stabilize the system.

4. The method for reducing the amount of new water used in coking wastewater by system interconnection treatment according to claim 3 is characterized in that: The specific calculation formula is as follows: Q 可送水量 =(Q1×X1-Q2×X2) / X3 Where: Q1 is the existing water volume of the receiving system; X1 is the existing indicator of the acceptance system; Q1 is the rated water volume of the receiving system; X2 is the rated index of the receiving system; X3 is the existing indicator of the delivery system. Note: X is the main indicator parameter that exceeds the standard in the system.

5. The method for reducing the amount of new water used in coking wastewater by system interconnection treatment according to claim 1 is characterized in that: At this stage, without investing large amounts of money in transformation, the system's operating capacity can be improved to a certain extent, and the operating and maintenance costs can be low. This can also enhance the impact resistance of a single system, effectively improve the utilization of space and system operating efficiency, and reduce the probability of environmental accidents.

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