Washing water treatment device for water scrubber

Abstract

The utility model belongs to the technical field of sewage treatment, and relates to a washing water treatment device of a water scrubber, which comprises a purified water cooler, the filtering unit comprises a first filter and a second filter which are connected in parallel, filtering inlets of the first filter and the second filter are connected with the treatment pipeline through filtering pipelines, and filtering outlets of the first filter and the second filter are connected with an after-filtering purification water pipe; the regeneration unit comprises a regeneration pipeline and a backwashing pipeline, the regeneration pipeline is connected with the treatment pipeline, nitrogen is introduced into the backwashing pipeline, the regeneration pipeline and the backwashing pipeline are connected with regeneration inlets of the first filter and the second filter, and regeneration outlets of the regeneration pipeline and the backwashing pipeline are connected with a sewage tank. The device has the advantages of capability of treating purified water into washing water, stability in long-term operation and low treatment cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and relates to a washing water treatment device for a water washing tower, which is particularly suitable for treating purified water into washing water for the water washing tower. Background Art

[0002] The olefin separation unit of the MTO device (olefin separation device) uses a water washing tower, and the water washing tower needs to use washing water during operation. Common washing water includes deoxygenated water and purified water. It is found in actual production that using purified water as washing water will cause blockage of the packing in the water washing tower and an increase in pressure difference, affecting the stable operation of the whole device. After analysis, it is found that mainly due to the presence of trace amounts of catalyst fines in the purified water (the turbidity of the purified water is 30 - 50 NTU), the catalyst fines will cause packing blockage after long-term use.

[0003] To avoid the above situation, deoxygenated water is used as the washing water for the water washing tower, but the cost of using deoxygenated water as washing water is relatively high. To reduce the cost, condensate water is tried to be used as the washing water for the water washing tower. After switching to condensate water, the amount of deoxygenated water saved is obvious, but the amount of condensate water sent out also decreases significantly.

[0004] Based on the above practical difficulties, how to provide low-cost and reliable washing water for the water washing tower has become an urgent problem to be solved. Content of the Utility Model

[0005] A washing water treatment device for a water washing tower provided by the utility model can treat purified water into washing water, with stable long-term operation and low treatment cost.

[0006] The technical solution of the utility model includes: a washing water treatment device for a water washing tower, comprising: a purified water cooler, the outlet of the purified water cooler is connected with a treatment pipeline; a filtering unit, the filtering unit includes a first filter and a second filter connected in parallel, the filtering inlets of the first filter and the second filter are connected with the treatment pipeline through a filtering pipeline, and the filtering outlets of the first filter and the second filter are connected with a filtered purified water pipe; a regeneration unit, the regeneration unit includes a regeneration pipeline and a backwashing pipeline, the regeneration pipeline is connected with the treatment pipeline, nitrogen is introduced into the backwashing pipeline, the regeneration pipeline and the backwashing pipeline are connected with the regeneration inlets of the first filter and the second filter, and the regeneration outlets of the first filter and the second filter are connected with a sewage tank.

[0007] Preferably, a filtering valve is provided on the filtering pipeline, and the filtering valve is in an open state all the time; a regeneration valve is provided on the regeneration pipeline, and when the first filter or the second filter needs regeneration treatment, the regeneration valve is in an open state.

[0008] Preferably, a first pipeline is connected to the filtration inlet of the first filter, and a first valve is provided on the first pipeline. A second pipeline is connected to the filtration inlet of the second filter, and a second valve is provided on the second pipeline. When the first filter is undergoing regeneration treatment, the first valve is in a closed state. When the second filter is undergoing regeneration treatment, the second valve is in a closed state.

[0009] Preferably, the filtration inlet is provided at the top of the first filter and the second filter, and the filtration outlet is provided at the bottom of the first filter and the second filter. The regeneration inlet is provided at the bottom of the first filter and the second filter, and the regeneration outlet is provided at the upper part of the first filter and the second filter.

[0010] Preferably, the purified water pipe after filtration is connected to a washing water buffer tank, and the washing water buffer tank is connected to an original washing water pipeline.

[0011] Preferably, the outlet of the purified water cooler is connected to an externally supplied purified water pipe, and the externally supplied purified water pipe is in parallel with the treatment pipeline.

[0012] Preferably, the first filter and the second filter are fluidized bed filters, and the turbidity of the purified water in the purified water pipe after filtration is less than 20 NTU.

[0013] Preferably, the bottom of the sewage tank is connected to a sewage pipeline, a sewage pump is provided on the sewage pipeline, a cyclone liquid separator is provided at the top of the sewage tank, and a gas phase pipeline is connected to the top of the sewage tank.

[0014] The beneficial effects of the present utility model are as follows: By designing a filtration unit to filter the purified water into washing water, the high cost caused by using deaerated water and condensate water can be avoided. At the same time, two filters are designed in the filtration unit and a regeneration unit is designed in cooperation. Once the pressure difference in the filter is too large, the regeneration treatment of the filter is started. At this time, one of the two filters is used for filtering the purified water to provide washing water, and the other is undergoing regeneration treatment for subsequent filtration of the purified water. By using the two filters and the regeneration unit, the continuous filtration of the purified water into washing water can be maintained, and the quality of the purified water after filtration treatment can be guaranteed to ensure the long-term stable operation of the water washing tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1It is a schematic diagram of an embodiment.

[0017] Wherein:

[0018] 1. Purified water cooler, 2. Outgoing purified water pipe, 3. Treatment pipeline, 31. Water pump, 4. Filtration pipeline, 41. Filtration valve, 5. Regeneration pipeline, 51. Regeneration valve, 6. First filter, 7. Second filter, 8. Backwash pipeline, 9. Sewage tank, 91. Sewage pump, 10. Purified water pipe after filtration;

[0019] 100. Washing water buffer tank, 200. Original washing water pipeline. Detailed implementation manners

[0020] In order to enable those skilled in the art to better understand the solution of the present utility model, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0021] In this article, terms such as "upper, lower, left, right, inner, outer" are established based on the positional relationship shown in the drawings. Depending on the different drawings, the corresponding positional relationship may also change accordingly. Therefore, it cannot be understood as an absolute limitation of the protection scope; moreover, relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components. In addition, in the embodiments of the present utility model, "above", "below", etc. include the number itself.

[0022] Referring to Figure 1 , the washing tower washing water treatment device of this embodiment includes: a purified water cooler 1, and the outlet of the purified water cooler 1 is connected with a treatment pipeline 3 to allow the purified water discharged from the purified water cooler 1 to enter the treatment pipeline 3 for subsequent treatment.

[0023] A filtration unit, which includes a first filter 6 and a second filter 7 connected in parallel. The advantage of designing two filters is that it can achieve one standby and one in use. Specifically, considering that after the filter is used for a period of time, the impurities retained by the internal filtration will cause blockage, designing two filters can be used for replacement to continuously carry out the filtration treatment of purified water. Among them, the filtration inlets of the first filter 6 and the second filter 7 are connected with the treatment pipeline 3 through the filtration pipeline 4, so that the purified water to be treated enters the first filter 6 and the second filter 7 through the treatment pipeline 3 and the filtration pipeline 4. The filtration outlets of the first filter 6 and the second filter 7 are connected with a purified water pipe 10 after filtration to discharge the purified water after filtration treatment from the purified water pipe 10 after filtration to the required equipment, such as provided to the washing tower as the washing water of the washing tower.

[0024] Regeneration unit. The advantage of designing this regeneration unit is that when the pressure difference across the first filter 6 or the second filter 7 becomes too large and regeneration treatment is required, the regeneration unit can be used to regenerate the first filter 6 and the second filter 7, thereby enabling the continuous operation of this treatment device to ensure the quality of the purified water after filtration and the long-term stable operation of the water washing tower. The regeneration unit includes a regeneration pipeline 5 and a backwashing pipeline 8. Among them, the regeneration pipeline 5 is connected to the treatment pipeline 3, nitrogen is passed through the backwashing pipeline 8, and the regeneration pipeline 5 and the backwashing pipeline 8 are connected to the regeneration inlets of the first filter 6 and the second filter 7. In this way, the purified water and nitrogen in the regeneration pipeline 5 and the backwashing pipeline 8 are used to backwash the filter, realizing the regeneration of the first filter 6 and the second filter 7. For example, under the combined action of nitrogen and backwashing purified water, the separation medium bed layer boils and fluidizes, realizing the regeneration of the separation medium bed layer. The regeneration outlets of the first filter 6 and the second filter 7 are connected to a sewage tank 9 to discharge the sewage generated during the regeneration treatment.

[0025] For the water washing tower washing water treatment device of this embodiment, purified water is still used as the washing water of the water washing tower to reduce costs; at the same time, to meet the need for the long-term stable operation of the water washing tower, the purified water is filtered and then provided to the water washing tower as washing water. On this basis, this embodiment designs a filtering unit and a regeneration unit. In the filtering unit, two parallel first filters 6 and second filters 7 are designed. In the regeneration unit, a regeneration pipeline 5 and a backwashing pipeline 8 are designed. When filtering the purified water, one of the first filter 6 and the second filter 7 is selected. Once the pressure difference inside the filter becomes too large after running for a period of time, for example, when it reaches a preset value, or when the filter has been running for more than a certain time, the filter is regenerated. At this time, the other filter filters the purified water to keep the filtration of the purified water continuous during regeneration. And after using the regeneration unit to regenerate the filter and then filtering the purified water, the quality of the purified water after filtration can be ensured, thereby ensuring the quality of the washing water provided to the water washing tower and facilitating the long-term stable operation of the water washing tower.

[0026] In this embodiment, the filtration pipeline 4 is provided with a filtration valve 41, and the filtration valve 41 is in an always-open state; the regeneration pipeline 5 is provided with a regeneration valve 51, and when the first filter 6 or the second filter 7 needs to be regenerated, the regeneration valve 51 is in an open state. Specifically, a first pipeline is connected to the filtration inlet of the first filter 6, and the first pipeline is provided with a first valve. A second pipeline is connected to the filtration inlet of the second filter 7, and the second pipeline is provided with a second valve. When the first filter 6 is being regenerated, the first valve is in a closed state. Similarly, when the second filter 7 is being regenerated, the second valve is in a closed state. Through the above connection pipelines and the valve design on the pipelines, it is beneficial to the smooth switching between the first filter 6 and the second filter 7 during the purification water filtration and the filter regeneration process, and the structural method is simple, which is beneficial to reducing the overall treatment cost.

[0027] Referring to Figure 1 , the filtration inlet is provided at the top of the first filter 6 and the second filter 7, and the filtration outlet is provided at the bottom of the first filter 6 and the second filter 7; and, the regeneration inlet is provided at the bottom of the first filter 6 and the second filter 7, and the regeneration outlet is provided at the upper part of the first filter 6 and the second filter 7. To achieve the natural flow of the purified water from top to bottom under the action of gravity during filtration, and the backwashing regeneration of the backwashing purified water and nitrogen from bottom to top during the regeneration process, with good comprehensive effects in the purification water filtration and the filter regeneration. Specifically, the first filter 6 and the second filter 7 are fluidized bed filters, and the turbidity of the purified water in the filtered purified water pipe 10 is less than 20 NTU, so as to meet the long-term stable operation requirements of the water washing tower and save a large amount of sewage and desalinated water treatment costs.

[0028] A washing water buffer tank 100 is connected to the filtered purified water pipe 10, and the washing water buffer tank 100 is connected to the original washing water pipeline 200. In this way, the purified water after filtration treatment is first introduced into the washing water buffer tank 100 and then provided to the water washing tower to improve the treatment stability of the washing water for the water washing tower. And, the original original washing water pipeline 200 is retained, and it can be switched in time in case of a failure, improving the safety and stability of the entire equipment.

[0029] An external delivery purified water pipe 2 is connected to the outlet of the purified water cooler 1, and the external delivery purified water pipe 2 is connected in parallel with the treatment pipeline 3. In addition to being able to filter the purified water and provide the washing water for the water washing tower, the treatment device in this embodiment can also provide purified water to other equipment, with a wide range of applications.

[0030] A sewage pipeline is connected to the bottom of the sewage tank 9, and the sewage pipeline is provided with a sewage pump 91. In addition, a cyclone deliquidation separator is provided at the top of the sewage tank 9, and a gas phase pipeline is connected to the top of the sewage tank 9. In this way, after the sewage discharged from the filter regeneration process enters the sewage tank 9, since the regenerated sewage contains nitrogen and solid particles, the gas phase is sent to other equipment, such as a flare, after the entrained liquid phase is removed by the cyclone deliquidation separator at the top of the sewage tank 9; the liquid phase containing solid particles is extracted from the lower part of the sewage tank 9, pressurized by the sewage pump 91, and the external flow rate is controlled by the regulating valve on the sewage pipeline, and then sent to other equipment, such as an existing concentrated slurry centrifugal dehydration system.

[0031] In the case where the embodiments are not contradictory, at least part of the technical solutions in the embodiments can be recombined to form the substantial technical solution of the utility model. Of course, the embodiments can also be referenced or included in each other. In addition, it should be noted that the adaptive adjustments and modifications made by those skilled in the art when recombining the technical means recorded in the embodiments will also fall within the protection scope of the utility model.

[0032] The technical principle of the present invention is described above in combination with specific implementations, but it should be noted that the above descriptions are only for explaining the principle of the present invention and cannot be interpreted in any way as a specific limitation on the protection scope of the present invention. Based on the explanation here, technicians in this field can think of other specific implementations or equivalent replacements of the present invention without creative work, and they will fall within the protection scope of the present invention.

Claims

1. A washing tower washing water treatment device, characterized in that: include: A purified water cooler (1), wherein an outlet of the purified water cooler (1) is connected to a treatment pipeline (3); A filter unit, the filter unit comprising a first filter (6) and a second filter (7) connected in parallel, the filter inlets of the first filter (6) and the second filter (7) being connected to the treatment pipeline (3) via a filter pipeline (4), and the filter outlets of the first filter (6) and the second filter (7) being connected to a post-filtration purified water pipe (10); A regeneration unit, the regeneration unit comprising a regeneration pipeline (5) and a backwashing pipeline (8), the regeneration pipeline (5) being connected to the treatment pipeline (3), nitrogen being passed through the backwashing pipeline (8), the regeneration pipeline (5) and the backwashing pipeline (8) being connected to the regeneration inlets of the first filter (6) and the second filter (7), and the regeneration outlets of the first filter (6) and the second filter (7) being connected to a sewage tank (9).

2. A washing tower washing water treatment device according to claim 1, characterized in that: The filter pipeline (4) is provided with a filter valve (41), and the filter valve (41) is in a normally open state; The regeneration pipeline (5) is provided with a regeneration valve (51), and when the first filter (6) or the second filter (7) needs to be regenerated, the regeneration valve (51) is in an open state.

3. A washing tower washing water treatment device according to claim 2, characterized in that: The filter inlet of the first filter (6) is connected to a first pipeline, the first pipeline is provided with a first valve, and the filter inlet of the second filter (7) is connected to a second pipeline, the second pipeline is provided with a second valve; When the first filter (6) is in a regeneration process, the first valve is in a closed state, and when the second filter (7) is in a regeneration process, the second valve is in a closed state.

4. A washing tower washing water treatment device according to claim 1, characterized in that: The filter inlet is arranged at the top of the first filter (6) and the second filter (7), and the filter outlet is arranged at the bottom of the first filter (6) and the second filter (7); The regeneration inlet is arranged at the bottom of the first filter (6) and the second filter (7), and the regeneration outlet is arranged at the top of the first filter (6) and the second filter (7).

5. A washing tower washing water treatment device according to claim 1, characterized in that: The filtered purified water pipe (10) is connected to a washing water buffer tank (100), and the washing water buffer tank (100) is connected to an original washing water pipeline (200).

6. A washing tower washing water treatment device according to claim 1, characterized in that: The outlet of the purified water cooler (1) is connected to an external purified water delivery pipe (2), and the external purified water delivery pipe (2) is connected in parallel with the treatment pipeline (3).

7. A washing tower washing water treatment device according to claim 1, characterized in that: The first filter (6) and the second filter (7) are fluidized bed filters, and the turbidity of the purified water in the purified water pipe (10) after filtration is less than 20 NTU.

8. A washing tower washing water treatment device according to claim 1, characterized in that: The bottom of the sewage tank (9) is connected to a sewage pipeline, the sewage pipeline is provided with a sewage pump (91), the top of the sewage tank (9) is provided with a cyclone deliquid separator, and the top of the sewage tank (9) is connected to a gas phase pipeline.

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