Recycling system for coking production circulating water wastewater
By designing a wastewater reuse system for coking production, the mixed use of circulating water discharged and production water is avoided, and the problem of difficult to improve the wastewater circulation energy consumption and water quality is solved, and the concentration ratio of circulating water is improved and the process flow is simplified, thus reducing construction and operation costs.
Patent Information
- Application Number
- CN202420626283.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-03-28
AI Technical Summary
Existing coking enterprises are mixing circulating water and sewage discharge and production water, resulting in increased energy consumption and chemical consumption of wastewater, making it difficult to improve water quality, and the operating pressure and cost of the membrane system of the boiler replenishment water station increased, and the risk of equipment corrosion increased.
A system for recycling wastewater for coking production is designed, and the entire production pool, circulating water, side filter, reclaimed water regulation pool, lift pump and reclaimed water reuse device are connected through pipelines, which avoids the mixing of circulating water and sewage and production water. Direct wastewater pipelines and check valves are used to prevent backflow, simplify the process flow and reduce construction and operation costs.
The concentration ratio of circulating water has been improved, the process flow is short, the construction investment is low and the operating cost is low, which avoids the risk of circulating water wastewater on production water and improves the quality of circulating water replenishing water.
Smart Images
Figure CN222770715U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of wastewater treatment, and in particular relates to a coking production circulating water wastewater recycling system. Background Art
[0002] Coking enterprises are key industrial water users, and the recycling of water resources is particularly important. For coking enterprises that adopt zero-emission, the main water consumption is the evaporation loss of circulating cooling water in production equipment.
[0003] However, many companies in the industry currently fail to effectively dispose of and reuse circulating water wastewater. Some companies even mix circulating water wastewater with production water and then feed it back into the circulating water system, which not only increases the energy consumption and reagent consumption of wastewater circulation, but also fails to improve the water quality of circulating water. At the same time, the mixed production water, as the raw water of boiler feed water, has a high salt and organic content, which increases the operating pressure and operating cost of the membrane system of the boiler feed water station. Due to the high chloride ion content in the water quality (controlled to be less than 700 mg / l), the corrosion risk of production water pipelines and water point equipment is increased, and the service life of the equipment is reduced. The circulating water of coking enterprises is mainly used for heat exchange of various chemical media. Once there is a leak in the heat exchange equipment, a large amount of chemical media will enter the circulating water. If this part of wastewater enters the production water, it will affect the water safety of the entire plant. Utility Model Content
[0004] In view of the problem that the circulating water and wastewater are mixed with production water in the prior art, which increases the wastewater circulation energy consumption and reagent consumption, and the water quality of the circulating water is difficult to improve, a coking production circulating water wastewater reuse system is proposed. The utility model provides the following technical solutions:
[0005] A coking production circulating water and wastewater reuse system comprises a whole-field production water pool, a circulating water pool, a side filter, a reclaimed water regulating pool, a lifting pump and a reclaimed water reuse device which are sequentially connected through pipelines; a primary water pipeline for conveying primary water is connected to the inlet of the whole-field production water pool; a direct wastewater pipeline for discharging wastewater from the circulating water pool is connected between the outlet of the circulating water pool and the inlet of the reclaimed water regulating pool; a produced water reuse pipeline for producing water reuse is connected between the outlet of the reclaimed water reuse device and the inlet of the circulating water pool.
[0006] Preferably, the discharge port of the reclaimed water reuse device is connected to a concentrated water delivery pipeline for external water supply.
[0007] Preferably, the discharge port of the whole-field production water pool is connected to a branch water supply pipeline for supplying water to other production devices.
[0008] Preferably, the reclaimed water reuse device comprises a mechanical accelerated clarification tank, a multi-media filter, an ultrafiltration device and a reverse osmosis device which are connected in sequence.
[0009] Preferably, the multi-media filter comprises multiple layers of filter media.
[0010] Preferably, the ultrafiltration device comprises an ultrafiltration membrane.
[0011] Preferably, a plurality of side filters are arranged in parallel.
[0012] Preferably, the side filter is connected to the reclaimed water regulating tank via a primary filtration pipeline, and flow meters and flow valves are provided on both the primary filtration pipeline and the direct wastewater discharge pipeline.
[0013] Preferably, a one-way valve is provided on the direct wastewater discharge pipeline.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] 1. It eliminates the intermediate collection and lifting links of circulating water sewage, avoids the mixing of circulating water sewage and production water, and increases the concentration multiple of circulating water;
[0016] 2. The original circulating water wastewater collection pool and the reclaimed water reuse station regulating pool are combined into one pool, which has a short process flow, low construction investment and low operating cost;
[0017] 3. A one-way valve is installed on the direct wastewater pipeline to prevent backflow. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the system structure of the utility model;
[0019] In the attached figure, 1. the whole-field production water pool; 2. the circulating water pool; 3. the side filter; 4. the grey water regulating tank; 5. the lifting pump; 6. the grey water reuse device; 7. the primary water pipeline; 8. the direct discharge wastewater pipeline; 9. the produced water reuse pipeline; 10. the primary filtration pipeline; 11. the branch water supply pipeline; 12. the concentrated water delivery pipeline. DETAILED DESCRIPTION
[0020] The directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the invention of the utility model.
[0021] like Figure 1As shown, a coking production circulating water and wastewater reuse system comprises a whole-field production water pool 1, a circulating water pool 2, a side filter 3, a reclaimed water regulating pool 4, a lifting pump 5 and a reclaimed water reuse device 6 which are sequentially connected through pipelines; the inlet of the whole-field production water pool 1 is connected with a primary water pipeline 7 for conveying primary water; a direct wastewater pipeline 8 for discharging wastewater from the circulating water pool 2 is connected between the outlet of the circulating water pool 2 and the inlet of the reclaimed water regulating pool 4; a produced water reuse pipeline 9 for produced water reuse is connected between the outlet of the circulating water pool 2 and the inlet of the reclaimed water reuse device 6; the mixing of circulating water sewage and production water is avoided, the diversion of clean water and wastewater is realized, the risk and influence of circulating water wastewater on the water quality of production water supply is eliminated, the quality of circulating water make-up water is improved, and the concentration multiple of circulating water can be increased.
[0022] Furthermore, the discharge port of the reclaimed water reuse device 6 is connected to a concentrated water delivery pipeline 12 for external water supply or external reprocessing.
[0023] Furthermore, the discharge port of the whole production water pool 1 is connected to a branch water supply pipeline 11 for supplying water to other production devices; valves are provided on each pipeline to control the on-off or flow rate.
[0024] Furthermore, multiple side filters 3 are arranged in parallel to improve the filtering efficiency; the side filters 3 are connected to the reclaimed water regulating tank 4 through the primary filtering pipeline 10, and the primary filtering pipeline 10 and the direct wastewater pipeline 8 are both provided with flow meters and flow valves; the direct wastewater pipeline 8 is provided with a one-way valve to prevent backflow.
[0025] The reclaimed water reuse device 6 includes a mechanical accelerated clarifier, a multi-media filter, an ultrafiltration device and a reverse osmosis device connected in sequence, wherein the multi-media filter comprises multiple layers of filter material; the ultrafiltration device comprises an ultrafiltration membrane; the mechanical accelerated clarifier adopts a double alkali method to remove hardness and suspended matter in the incoming water, the multi-media filter mainly removes suspended matter and colloids in the water body through multiple layers of filter material to reduce the turbidity of the produced water, and the ultrafiltration device adopted later further intercepts impurities such as colloids, macromolecular organic matter and suspended matter in the water body through the ultrafiltration membrane; the reverse osmosis device mainly removes inorganic salts in the water and removes organic components in the water to obtain reverse osmosis produced water and reverse osmosis concentrated water, the reverse osmosis produced water is replenished to the circulating water system as demineralized water, and the reverse osmosis concentrated water enters the subsequent system for treatment;
[0026] The size of the reclaimed water regulating tank 4 must be selected to meet the requirements of simultaneous backwash discharge of all circulating water side filters 3 and collection of other wastewater during continuous discharge, so as to avoid overflow of the regulating tank due to excessive forward flow. The mechanical accelerated clarification tank water supply equipment can be selected according to the average inlet flow of the regulating tank.
[0027] In general circulating water treatment, it includes intermediate collection of circulating water sewage (i.e. connecting a wastewater collection tank after the side filter 3) and lifting (lifting from the wastewater collection tank to the whole-field production water tank 1 for wastewater reincorporation), while this system simplifies it, combining the original circulating water sewage collection tank and the regulating tank of the reclaimed water reuse station into a reclaimed water regulating tank 4; it avoids mixing of circulating water sewage and production water, increases the concentration multiple of circulating water, has a short process flow, low construction investment and low operating cost.
Claims
1. A coking production circulating water wastewater reuse system, characterized in that: The invention comprises a whole-field production water pool (1), a circulating water pool (2), a side filter (3), a reclaimed water regulating pool (4), a lifting pump (5) and a reclaimed water recycling device (6) which are connected in sequence through pipelines; the inlet of the whole-field production water pool (1) is connected to a primary water pipeline (7) for conveying primary water; a direct wastewater pipeline (8) for discharging wastewater from the circulating water pool (2) is connected between the outlet of the circulating water pool (2) and the inlet of the reclaimed water regulating pool (4); and a produced water recycling pipeline (9) for recycling produced water is connected between the outlet of the reclaimed water recycling device (6) and the inlet of the circulating water pool (2).
2. The coking production circulating water wastewater reuse system according to claim 1 is characterized in that: The discharge port of the reclaimed water recycling device (6) is connected to a concentrated water delivery pipeline (12) for external water supply.
3. The coking production circulating water wastewater reuse system according to claim 1 is characterized in that: The discharge port of the whole-field production water pool (1) is connected to a branch water supply pipeline (11) for supplying water to other production devices.
4. The coking production circulating water wastewater reuse system according to any one of claims 1 to 3, characterized in that: The reclaimed water recycling device (6) comprises a mechanical accelerated clarification tank, a multi-media filter, an ultrafiltration device and a reverse osmosis device which are connected in sequence.
5. The coking production circulating water wastewater reuse system according to claim 4 is characterized in that: Multi-media filters contain multiple layers of filter media.
6. The coking production circulating water wastewater reuse system according to claim 4 is characterized in that: The ultrafiltration device contains an ultrafiltration membrane.
7. The coking production circulating water wastewater reuse system according to claim 1 is characterized in that: A plurality of side filters (3) are arranged in parallel.
8. The coking production circulating water wastewater reuse system according to claim 1 or 7, characterized in that: The side filter (3) is connected to the reclaimed water regulating tank (4) via a primary filtering pipeline (10), and a flow meter and a flow valve are provided on the primary filtering pipeline (10) and the direct wastewater discharge pipeline (8).
9. The coking production circulating water wastewater reuse system according to claim 1, characterized in that: The direct wastewater discharge pipeline (8) is provided with a one-way valve.