Device for replacing waste water with water-coal-slurry gasification supplementary circulating water
The treatment system, consisting of a circulating water tank and buffer tank, disc filter, activated carbon filter, ultrafiltration device and reverse osmosis device, solves the problem of equipment scaling caused by the enrichment of substances such as calcium, magnesium and chlorine in the circulating water, and realizes the cascade utilization of water resources and cost reduction.
Patent Information
- Application Number
- CN202520215354.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-02-11
AI Technical Summary
The accumulation of calcium, magnesium, chlorine and other substances in industrial circulating water leads to scaling and corrosion of heat exchange equipment. Traditional circulating water replacement of wastewater does not achieve the cascade utilization of water resources, and the equipment using primary water will scale quickly, while the cost of using desalinated water is high.
The treatment system consists of a circulating water tank and buffer tank, a disc filter, an activated carbon filter, an ultrafiltration device, and primary and secondary reverse osmosis devices. The circulating water treated by filtration and reverse osmosis in the patent is transported through pipelines. The concentrated water produced is used as makeup water, and the permeate is used as a substitute for demineralized water, thus realizing the cascade utilization of wastewater.
It slows down the scaling rate of coal-water slurry gasification ash water pipelines, reduces operating costs, and enables cascade utilization of water resources and stable production.
Smart Images
Figure CN223723084U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of coal water slurry gasification, and particularly relates to a coal water slurry gasification supplementary circulating water replacement wastewater device. BACKGROUND
[0002] During the operation of industrial circulating water, a large amount of water evaporates, and the contents of calcium, magnesium, chlorine and other substances in the water continuously enrich and rise, resulting in fouling and corrosion of heat exchange equipment, so a certain amount of replacement discharge must be ensured. The traditional circulating water replacement wastewater is discharged after sewage treatment, and the cascade utilization of water resources is not realized. During the operation of coal water slurry gasification, ash water is used to wash coal gas and ash slag, and the contents of calcium, magnesium, chlorine and other substances in the water continuously enrich and rise, so a certain amount of water supplement and drainage must be maintained to keep the contents of calcium, magnesium, chlorine and other substances in the water in a balanced state. In the original process of coal water slurry gasification, some enterprises use primary water, but the hardness of the water is high, the equipment and pipelines are fouled quickly, and this is not conducive to production operation. Some enterprises use desalted water, which is high in cost and affects the economic benefits of enterprises. SUMMARY
[0003] The utility model aims at providing a coal water slurry gasification supplementary circulating water replacement wastewater device. The outlet of the circulating water pool is connected with the inlet of the buffer pool, the outlet of the buffer pool is connected with the filter device, the outlet of the filter device is connected with the inlet of the first reverse osmosis device, the outlet of the first reverse osmosis device is connected with the inlet of the second reverse osmosis device, and the outlet of the second reverse osmosis device is connected with the inlet of the gasification deaerator.
[0004] The filter device comprises a disc filter, an activated carbon filter and an ultrafiltration device, that is, the circulating water pool is connected with the buffer pool, the disc filter, the activated carbon filter, the ultrafiltration device and the first reverse osmosis device in sequence through pipelines.
[0005] The outlet of the first reverse osmosis device is connected with a first water production pool and a high-pressure water pump in sequence, and then connected with the inlet of the second reverse osmosis device.
[0006] The outlet of the second reverse osmosis device is connected with a second water production tank and a second water production delivery pump in sequence, and then connected with the inlet of the gasification deaerator.
[0007] The first reverse osmosis device is connected with a first concentrated water recovery device, so that the first concentrated water produced by the second reverse osmosis device enters the first concentrated water recovery device.
[0008] The outlet of the second reverse osmosis device is connected with the inlet of a second concentrated water tank, and the second concentrated water tank is connected with the circulating water pool through a second concentrated water delivery pump.
[0009] The outlet of the second reverse osmosis device is connected with the first concentrated water recovery device, so that the chemical cleaning wastewater of the second reverse osmosis device enters the first concentrated water recovery device.
[0010] The secondary water production tank is communicated with the desalted water pipe network, and when the water production is insufficient, the desalted water can be directly supplemented to ensure the operation of the coal water slurry gasification.
[0011] The cut-off valve one is arranged between the secondary reverse osmosis device and the secondary water production tank, and the cut-off valve two is arranged between the secondary reverse osmosis device and the primary concentrated water recovery device; when the secondary reverse osmosis device is chemically cleaned, the cut-off valve one is closed, the cut-off valve two is opened, and the cleaning waste water is discharged to the primary concentrated water recovery device.
[0012] The beneficial effects of the utility model lie in:
[0013] 1. After the treated circulating water replacement waste water, the water quality is close to desalted water, which can not only delay the scale formation speed of the coal water slurry gasification ash water pipe, but also reduce the operation cost of the coal water slurry gasification.
[0014] 2. The utility model produces the concentrated water as the circulating water supplement water, and the water production is used as the desalted water replacement water, so that the waste water is used in stages.
[0015] 3. The utility model can directly supplement the desalted water when the water production is insufficient, and effectively ensures the stable operation of the coal water slurry gasification. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 A coal water slurry gasification circulating water replacement waste water device.
[0017] In the drawing: circulating water pool 1, buffer pool 2, disc filter 3, activated carbon filter 4, ultrafiltration device 5, primary reverse osmosis device 6, primary water production tank 7, high-pressure water pump 8, secondary reverse osmosis device 9, cut-off valve one 10, secondary water production tank 11, desalted water pipe network 12, secondary water production delivery pump 13, gasification deaerator 14, cut-off valve two 15, secondary concentrated water tank 16, secondary concentrated water delivery pump 17, primary concentrated water recovery device 18. DETAILED DESCRIPTION
[0018] The technical scheme in the utility model embodiments will be described clearly and completely in combination with specific implementation examples of the utility model. The examples are only a part of the utility model, not all. Based on the examples in the utility model, all other examples obtained by the ordinary skilled in the art without creative labor are within the protection scope of the utility model.
[0019] Example 1
[0020] A kind of coal water slurry gasification supplementary circulating water replacement wastewater device, circulating water pool 1 outlet is connected with the import of buffer pool 2, the outlet of buffer pool 2 is connected with filtering device, the outlet of filtering device is connected with the import of primary reverse osmosis device 6, the outlet of primary reverse osmosis device 6 is connected with the import of secondary reverse osmosis device 9, the outlet of secondary reverse osmosis device 9 is connected with the import of gasification deaerator 14.
[0021] The filtering device includes disc filter 3, activated carbon filter 4, ultrafiltration device 5, i.e., circulating water pool 1 is sequentially connected with buffer pool 2, disc filter 3, activated carbon filter 4, ultrafiltration device 5, primary reverse osmosis device 6 by pipeline.
[0022] The outlet of primary reverse osmosis device 6 is sequentially connected with primary water pool 7, high-pressure water pump 8, and then connected with the import of secondary reverse osmosis device 9.
[0023] The outlet of secondary reverse osmosis device 9 is sequentially connected with secondary water tank 11 and secondary water delivery pump 13, and then connected with the import of gasification deaerator 14.
[0024] Primary reverse osmosis device 6 is connected with primary concentrated water recovery device 18, so that the primary concentrated water containing salt generated by secondary reverse osmosis device 9 enters primary concentrated water recovery device 18.
[0025] The outlet of secondary reverse osmosis device 9 is connected with the import of secondary concentrated water tank 16, and secondary concentrated water tank 16 is connected with circulating water pool 1 through secondary concentrated water delivery pump 17.
[0026] The outlet of secondary reverse osmosis device 9 is connected with primary concentrated water recovery device 18, so that the chemical cleaning wastewater of secondary reverse osmosis device 9 enters primary concentrated water recovery device 18.
[0027] Secondary water tank 11 is communicated with desalted water pipe network 12, and when the water production is insufficient, desalted water can be directly supplemented to ensure the operation of coal water slurry gasification.
[0028] Cut-off valve one 10 is arranged between secondary reverse osmosis device 9 and secondary water tank 11, and cut-off valve two 15 is arranged between secondary reverse osmosis device 9 and primary concentrated water recovery device 18; when secondary reverse osmosis device is chemically cleaned, cut-off valve one 10 is closed, cut-off valve two 15 is opened, and the cleaning wastewater is discharged to primary concentrated water recovery device 18.
[0029] In the utility model, circulating water pool 1: store circulating water, concrete water pool, 22.6m*19m*2m.
[0030] Buffer pool 2: circulating water replacement wastewater transfer, concrete water pool, 18m*12m*6m.
[0031] Disc filter 3: remove macromolecular impurities in the circulating water replacement wastewater, DLLF4-4, filtration accuracy 100 μm.
[0032] Activated carbon filter 4: remove suspended solids, colloid, residual chlorine and the like in water, φ3200mmx6200mm, filtration speed 10 m / h.
[0033] Ultrafiltration device 5: remove small particles, bacteria, germs and protozoa and the like, φ225x2360, UOF-2240.
[0034] Primary reverse osmosis device 6: remove salt in the circulating water replacement wastewater, 08040-144-2.
[0035] Primary water production tank 7: store primary water production, concrete tank, 12m x 6m x 6m.
[0036] High-pressure water pump 8: pressurize primary water production, CR95-7 A-F-A-E-HQQE, flow rate Q=100m3 / h, head H=220m
[0037] Secondary reverse osmosis device 9: remove salt in primary water production, 08040-54-1.
[0038] Shutoff valve one 10: pneumatic valve, DN100.
[0039] Secondary water production tank 11: store secondary water production, φ5400x9000mm, volume 200m 3 , material 304 stainless steel.
[0040] Desalinated water pipe network 12: desalinated water from the desalination water station, pipe specification DN100, material 304 stainless steel.
[0041] Secondary water production delivery pump 13: deliver secondary water production to the gasification deaerator, DFG100-250B / 2, flow rate Q=80m3 / h, head H=60m.
[0042] Gasification deaerator 14: remove dissolved oxygen in water, φ3000x8500mm.
[0043] Shutoff valve two 15: pneumatic valve, DN100.
[0044] Secondary concentrated water tank 16: store secondary concentrated water, φ5400x9000mm, volume 200m 3 , material 304 stainless steel.
[0045] Secondary concentrated water delivery pump 17: deliver secondary concentrated water to the circulating water tank, DFW200-400, flow rate Q=200m3 / h, head H=38m.
[0046] Primary concentrated water recovery device 18: further treat the concentrated water produced by primary reverse osmosis device to be qualified.
[0047] The circulating water pool 1 replaces waste water about 100m 3 / h, the waste water passes through buffer pool 2, disc filter 3, activated carbon filter 4, ultrafiltration device 5 and primary reverse osmosis device 6 in turn. The primary water 60m 3 / h produced by primary reverse osmosis device 6 is desalted, enters primary water pool 7, is pressurized to 2.0MPa by high-pressure water pump 8, and enters secondary reverse osmosis device 9 for treatment. The water amount 40m 3 / h entering secondary water tank 11 is sent to gasification deaerator 14 by secondary water delivery pump 13; secondary concentrated water tank 16 20m 3 / h is sent to circulating water pool 1 by secondary concentrated water delivery pump 17. The water quality analysis is shown in the following table, which meets the standard requirements.
[0048]
Claims
1. A coal water slurry gasification make-up circulating water displacement wastewater device, characterized by, The outlet of the circulating water pool (1) is connected with the inlet of the buffer pool (2), the outlet of the buffer pool (2) is connected with the filtering device, the outlet of the filtering device is connected with the inlet of the first reverse osmosis device (6), the outlet of the first reverse osmosis device (6) is connected with the inlet of the second reverse osmosis device (9), and the outlet of the second reverse osmosis device (9) is connected with the inlet of the gasification deaerator (14).
2. The water coal slurry gasification supplementary circulating water displacement wastewater device according to claim 1, characterized in that, The filtering device comprises a disc filter (3), an activated carbon filter (4) and an ultrafiltration device (5), that is, the circulating water pool (1) is connected with the buffer pool (2), the disc filter (3), the activated carbon filter (4), the ultrafiltration device (5) and the first reverse osmosis device (6) in sequence through pipelines.
3. The water coal slurry gasification supplementary circulating water displacement wastewater device according to claim 1, characterized in that, The outlet of the first reverse osmosis device (6) is connected with the first water production pool (7) and the high-pressure water pump (8) in sequence, and then is connected with the inlet of the second reverse osmosis device (9).
4. The water coal slurry gasification make-up circulating water replacing waste water device according to claim 1, characterized in that, The outlet of the second reverse osmosis device (9) is connected with the second water production tank (11) and the second water production delivery pump (13) in sequence, and then is connected with the inlet of the gasification deaerator (14).
5. The water coal slurry gasification make-up circulating water replacing wastewater device according to claim 1, characterized in that, The first reverse osmosis device (6) is connected with the first concentrated water recovery device (18), so that the first concentrated water containing salt generated by the second reverse osmosis device (9) is sent to the first concentrated water recovery device (18).
6. The water coal slurry gasification make-up circulating water replacing wastewater device according to claim 1, characterized in that, The outlet of the second reverse osmosis device (9) is connected with the inlet of the second concentrated water tank (16), and the second concentrated water tank (16) is connected with the circulating water pool (1) through the second concentrated water delivery pump (17).
7. The water coal slurry gasification make-up circulating water replacing wastewater device according to claim 1, characterized in that, The outlet of the second reverse osmosis device (9) is connected with the first concentrated water recovery device (18), so that the chemical cleaning waste water of the second reverse osmosis device (9) enters the first concentrated water recovery device (18).
8. The water coal slurry gasification make-up circulating water replacing wastewater device according to claim 1, characterized in that, The second water production tank (11) is communicated with the desalted water pipe network (12), so that when the water production is insufficient, the desalted water can be directly supplemented to ensure the operation of the coal slurry gasification.
9. The water coal slurry gasification make-up circulating water replacing wastewater device according to claim 1, characterized in that, The cut-off valve one (10) is arranged between the second reverse osmosis device (9) and the second water production tank (11), and the cut-off valve two (15) is arranged between the second reverse osmosis device (9) and the first concentrated water recovery device (18); when the second reverse osmosis device is chemically cleaned, the cut-off valve one (10) is closed, and the cut-off valve two (15) is opened, so that the cleaning waste water is discharged to the first concentrated water recovery device (18).