High-concentration phenol-ammonia wastewater treatment device

Abstract

The utility model relates to a high-concentration phenol-ammonia wastewater treatment device which comprises a pre-extraction tower, a regeneration tower, a deacidification tower, a deamination tower, a re-extraction tower, a phenol tower, a water tower and a deacidification tower feeding preheater. According to the device, one of the deamination wastewater and the pre-extraction wastewater exchanges heat in the feeding preheater of the deacidification tower, so that the heat of the deamination wastewater is fully utilized, and the energy consumption is reduced; a double-extraction process is adopted, namely, an extraction process is performed before and after a deacidification process and a deamination process respectively, so that phenol and ammonia in the high-concentration phenol-ammonia wastewater are fully recovered, and a good foundation is laid for subsequent biochemical treatment; a non-polar extraction agent and a polar extraction agent are regenerated and recycled, so that the waste of the extraction agents is avoided; two extraction agents, namely a non-polar extraction agent and a polar extraction agent, are adopted, so that the extraction pertinence is strong, and the extraction effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial wastewater treatment, in particular to a high-concentration phenol-ammonia wastewater treatment device. Background Art

[0002] High-concentration phenol-ammonia wastewater contains a large amount of tar, ammonia and other substances, and has a complex composition. Direct discharge will seriously pollute the environment, and the phenols and other substances contained in it are important chemical raw materials. Therefore, treating high-concentration phenol-ammonia wastewater to meet the discharge standards and recovering phenols and ammonia in the wastewater has environmental and certain economic significance.

[0003] High-concentration phenol-ammonia wastewater needs to be pretreated before entering the biochemical treatment device. Biochemical treatment of wastewater is one of the most important processes in the wastewater treatment system. However, high-concentration phenol-ammonia wastewater has complex components, which will affect the life activities of microorganisms in biochemical treatment and even cause microorganisms to mutate or die. Therefore, high-concentration phenol-ammonia wastewater needs to be pretreated to improve its biochemical properties.

[0004] At present, the process schemes for treating high-concentration phenol-ammonia wastewater include: acidification-extraction-deacidification-deamination-crude phenol refining, deacidification-deamination-extraction, deamination-salting out-adsorption, etc. The above schemes can remove phenolic substances and ammonia in high-concentration phenol-ammonia wastewater, but the wastewater after treatment contains more organic matter and higher COD value, which cannot meet the requirements of biochemical treatment. Utility Model Content

[0005] The utility model aims to solve the deficiencies of the prior art and provides a high-concentration phenol-ammonia wastewater treatment device.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] A high-concentration phenol-ammonia wastewater treatment device comprises a pre-extraction tower, a regeneration tower, a deacidification tower, a deammonification tower, a re-extraction tower, a phenol tower, a water tower and a deacidification tower feed preheater;

[0008] The upper end of the side wall of the pre-extraction tower is provided with an inlet for the raw material aminophenol wastewater, the lower end of the side wall is provided with an inlet for the non-polar extractant and a reflux port for the non-polar extractant, the top is provided with a pre-extraction outlet, and the bottom is provided with a pre-extraction wastewater outlet; the side wall of the regeneration tower is provided with a regeneration tower feed inlet, the top is provided with a non-polar extractant regeneration production outlet, and the bottom is provided with a tar production outlet; the side wall of the deacidification tower is provided with a deacidification tower cold feed inlet and a deacidification tower hot feed inlet, the top is provided with an acid gas outlet, and the bottom is provided with a deacidification wastewater outlet; the side wall of the deamination tower is provided with a deamination tower feed inlet, the top is provided with an ammonia outlet, and the bottom is provided with a deacidification tower. Ammonia wastewater outlet; a re-extraction tower feed port is provided at the upper end of the side wall of the re-extraction tower, a polar extractant inlet is provided at the lower end of the side wall, a re-extracted product outlet is provided at the top, and a dephenolation wastewater outlet is provided at the bottom; a phenol tower feed port is provided on the side wall of the phenol tower, a phenol tower polar extractant outlet is provided at the top, and a crude phenol outlet is provided at the bottom; a water tower feed port is provided on the side wall of the water tower, a water tower polar extractant outlet is provided at the top, and a water outlet is provided at the bottom; a pre-extraction wastewater heat exchange inlet, a pre-extraction wastewater heat exchange outlet, a deammoniation wastewater heat exchange inlet, and a deammoniation wastewater heat exchange outlet are provided on the deacidification tower feed preheater;

[0009] The pre-extraction outlet is connected to the regeneration tower feed inlet, the non-polar extractant regeneration outlet is connected to the non-polar extractant reflux port, the pre-extraction wastewater outlet is respectively connected to the deacidification tower cold feed inlet and the pre-extraction wastewater heat exchange inlet, the pre-extraction wastewater heat exchange outlet is connected to the deacidification tower hot feed inlet, the deacidification wastewater outlet is connected to the deamination tower feed inlet, the deamination wastewater outlet is connected to the deamination wastewater heat exchange inlet, the deamination wastewater heat exchange outlet is connected to the re-extraction tower feed inlet, the re-extraction outlet is connected to the phenol tower feed inlet, the dephenolation wastewater outlet is connected to the water tower feed inlet, and the phenol tower polar extractant outlet and the water tower polar extractant outlet are both connected to the polar extractant inlet.

[0010] The raw material acetaminophen wastewater inlet is connected with the raw material acetaminophen wastewater input pipeline.

[0011] The non-polar extractant inlet is connected to a non-polar extractant input pipeline.

[0012] The tar production outlet is connected with a tar output pipeline.

[0013] The acid gas outlet is connected to an acid gas discharge pipeline.

[0014] The ammonia outlet is connected with an ammonia discharge pipeline.

[0015] The polar extractant inlet is connected to a polar extractant input pipeline.

[0016] The crude phenol extraction outlet is connected with a crude phenol output pipeline.

[0017] The water outlet is connected with a drainage pipe.

[0018] The beneficial effects of the utility model are as follows: the utility model reduces energy consumption, adopts a double extraction process, has a good extraction effect, produces pretreated effluent that meets the biochemical treatment wastewater index, regenerates and recycles non-polar extractants and polar extractants, and avoids waste of extractants. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] In the figure: 1-pre-extraction tower; 2-regeneration tower; 3-deacidification tower; 4-deamination tower; 5-re-extraction tower; 6-phenol tower; 7-water tower; 8-deacidification tower feed preheater;

[0021] 11-inlet for the acetaminophen wastewater; 12-inlet for the non-polar extractant; 13-return port for the non-polar extractant; 14-outlet for the pre-extractant; 15-outlet for the pre-extracted wastewater;

[0022] 21-regeneration tower feed port; 22-non-polar extractant regeneration outlet; 23-tar outlet;

[0023] 31-deacidification tower cold feed inlet; 32-deacidification tower hot feed inlet; 33-acid gas outlet; 34-deacidification wastewater outlet;

[0024] 41-deamination tower feed inlet; 42-ammonia outlet; 43-deamination wastewater outlet;

[0025] 51-re-extraction tower feed port; 52-polar extractant inlet; 53-re-extract product extraction port; 54-dephenolization wastewater outlet;

[0026] 61-phenol tower feed port; 62-phenol tower polar extractant extraction port; 63-crude phenol extraction port;

[0027] 71-water tower feed port; 72-water tower polar extractant extraction port; 73-water outlet;

[0028] 81-pre-extraction wastewater heat exchange inlet; 82-pre-extraction wastewater heat exchange outlet; 83-deammoniation wastewater heat exchange inlet; 84-deammoniation wastewater heat exchange outlet;

[0029] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer according to the following description. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0031] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0034] like Figure 1 As shown, a high-concentration phenol-ammonia wastewater treatment device includes a pre-extraction tower 1, a regeneration tower 2, a deacidification tower 3, a deammonification tower 4, a re-extraction tower 5, a phenol tower 6, a water tower 7 and a deacidification tower feed preheater 8.

[0035] The upper end of the side wall of the pre-extraction tower 1 is provided with a raw material aminophenol wastewater inlet 11, the lower end of the side wall is provided with a non-polar extractant inlet 12 and a non-polar extractant reflux port 13, the top is provided with a pre-extract outlet 14, and the bottom is provided with a pre-extraction wastewater outlet 15.

[0036] A regeneration tower feed inlet 21 is provided on the side wall of the regeneration tower 2, a non-polar extractant regeneration outlet 22 is provided on the top, and a tar outlet 23 is provided on the bottom.

[0037] A cold feed inlet 31 and a hot feed inlet 32 ​​for the deacidification tower are arranged on the side wall of the deacidification tower 3, an acid gas outlet 33 is arranged at the top, and a deacidification wastewater outlet 34 is arranged at the bottom.

[0038] A deamination tower feed inlet 41 is provided on the side wall of the deamination tower 4, an ammonia outlet 42 is provided on the top, and a deamination wastewater outlet 43 is provided on the bottom.

[0039] The upper end of the side wall of the re-extraction tower 5 is provided with a re-extraction tower feed inlet 51, the lower end of the side wall is provided with a polar extractant inlet 52, the top is provided with a re-extracted product sampling outlet 53, and the bottom is provided with a dephenolization wastewater outlet 54.

[0040] A phenol tower feed inlet 61 is provided on the side wall of the phenol tower 6, a phenol tower polar extractant withdrawal outlet 62 is provided on the top, and a crude phenol withdrawal outlet 63 is provided on the bottom.

[0041] The water tower 7 is provided with a water tower feed inlet 71 on the side wall, a water tower polar extractant extraction outlet 72 on the top, and a water outlet 73 at the bottom.

[0042] The deacidification tower feed preheater 8 is provided with a pre-extraction wastewater heat exchange inlet 81, a pre-extraction wastewater heat exchange outlet 82, a deammoniation wastewater heat exchange inlet 83, and a deammoniation wastewater heat exchange outlet 84;

[0043] The raw material acetaminophen wastewater inlet 11 is connected to the raw material acetaminophen wastewater input pipeline, the non-polar extractant inlet 12 is connected to the non-polar extractant input pipeline, the pre-extractant outlet 14 is connected to the regeneration tower feed port 21, the non-polar extractant regeneration production port 22 is connected to the non-polar extractant reflux port 13, the tar production port 23 is connected to the tar output pipeline, the pre-extraction wastewater outlet 15 is respectively connected to the deacidification tower cold feed port 31 and the pre-extraction wastewater heat exchange inlet 81, the pre-extraction wastewater heat exchange outlet 82 is connected to the deacidification tower hot feed port 32, the acid gas outlet 33 is connected to the acid gas discharge pipeline, and the deacidification wastewater outlet 34 is connected to The deamination tower feed inlet 41 is connected, the ammonia outlet 42 is connected to an ammonia discharge pipeline, the deamination wastewater outlet 43 is connected to the deamination wastewater heat exchange inlet 83, the deamination wastewater heat exchange outlet 84 is connected to the re-extraction tower feed inlet 51, the polar extractant inlet 52 is connected to the polar extractant input pipeline, the re-extractant production outlet 53 is connected to the phenol tower feed inlet 61, the crude phenol production outlet 63 is connected to the crude phenol output pipeline, the dephenolation wastewater outlet 54 is connected to the water tower feed inlet 71, the phenol tower polar extractant production outlet 62 and the water tower polar extractant production outlet 72 are both connected to the polar extractant inlet 52, and the water outlet 73 is connected to a drainage pipeline.

[0044] The device of the utility model realizes the pre-extraction and extraction agent regeneration process, the deacidification process, the deammoniation process, the re-extraction process, the dephenolization and extraction agent regeneration process when working, which are specifically as follows:

[0045] Pre-extraction and extractant regeneration process: the raw material phenol-ammonia wastewater enters the tower from the upper part of the pre-extraction tower 1, and the non-polar extractant enters the tower from the lower part of the pre-extraction tower 1. The non-polar extractant and the raw material phenol-ammonia wastewater are continuously countercurrently extracted, and the pre-extraction product is extracted from the top of the pre-extraction tower 1, and the pre-extraction wastewater is extracted from the bottom of the pre-extraction tower 1. The pre-extraction product extracted from the top of the pre-extraction tower 1 enters the regeneration tower 2 from the regeneration tower feed port 21, and is stripped and distilled by the regeneration tower 2. The non-polar extractant extracted from the top of the regeneration tower 2 returns to the lower part of the pre-extraction tower 1 to continue to participate in the pre-extraction, and the tar extracted from the bottom of the regeneration tower 2 can be used as a product delivery device.

[0046] Deacidification process: the pre-extraction wastewater produced from the bottom of the pre-extraction tower 1 is divided into two streams, one of which is used as the cold feed of the deacidification tower and enters the deacidification tower 3 from the cold feed port 31 of the deacidification tower, and the other is preheated by the deacidification tower feed preheater 8 and enters the deacidification tower 3 from the hot feed port 32 of the deacidification tower as the hot feed of the deacidification tower. After stripping and distillation in the deacidification tower 3, acidic gas is produced from the top of the deacidification tower 3, and deacidification wastewater is produced from the bottom of the deacidification tower 3.

[0047] Deamination process: the deacidification wastewater produced from the bottom of the deacidification tower 3 enters the deacidification tower 4 from the deacidification tower feed port 41. After the steam stripping and distillation in the deacidification tower 4, ammonia gas is produced from the top of the deacidification tower 4 as a product delivery device. The deacidification wastewater produced from the bottom of the deacidification tower 4 is used as the feed of the re-extraction tower 5 after recovering heat in the deacidification tower feed preheater 8.

[0048] Re-extraction process: the deammoniation wastewater is recovered through the deacidification tower feed preheater 8 and then enters the re-extraction tower 5 from the re-extraction tower feed port 51. The polar extractant enters the tower from the lower part of the re-extraction tower 5. The polar extractant and the deammoniation wastewater are continuously extracted in countercurrent. The re-extracted product is taken out from the top of the re-extraction tower 5, and the dephenolization wastewater is taken out from the bottom of the re-extraction tower 5.

[0049] Dephenolization and extractant regeneration process: the re-extracted product taken from the top of the re-extraction tower 5 enters the phenol tower 6 from the phenol tower feed port 61. After the stripping and distillation of the phenol tower 6, the crude phenol is taken from the bottom of the phenol tower 6 as the product delivery device, and the polar extractant is taken from the top of the phenol tower 6. The dephenolization wastewater taken from the bottom of the re-extraction tower 5 enters the water tower 7 from the water tower feed port 71. After the stripping and distillation of the water tower 7, water is discharged from the bottom of the water tower 7, and the polar extractant is taken from the top of the water tower 7. The polar extractant taken from the top of the phenol tower 6 and the polar extractant taken from the top of the water tower 7 are returned to the lower part of the re-extraction tower 5 together to participate in the extraction.

[0050] The extraction process is performed before and after the deacidification and deamination process, which is called double extraction process. The double extraction process uses two different extractants, that is, the pre-extraction process uses a non-polar extractant and the re-extraction process uses a polar extractant.

[0051] The deammoniation wastewater and one of the pre-extraction wastewaters are heat exchanged in the deacidification tower feed preheater 8.

[0052] The non-polar extractant regeneration outlet 22 of the regeneration tower 2 is connected to the non-polar extractant reflux outlet 13 at the lower part of the pre-extraction tower 1 through a regeneration non-polar extractant pipeline.

[0053] The phenol tower polar extractant extraction port 62 of the phenol tower 6 and the water tower polar extractant extraction port 72 of the water tower 7 are connected to the polar extractant inlet 52 of the re-extraction tower 5 through the regeneration polar extractant pipeline.

[0054] The utility model reduces energy consumption and produces pre-treated effluent that meets biochemical wastewater treatment indicators.

[0055] In the utility model, one of the deammoniation wastewater and the pre-extraction wastewater is heat-exchanged in the deacidification tower feed preheater, which makes full use of the heat of the deammoniation wastewater and reduces energy consumption; a double extraction process is adopted, that is, the extraction process is respectively carried out before and after the deacidification and deammonification processes, and the phenol and ammonia in the high-concentration phenol-ammonia wastewater are fully recovered, laying a good foundation for subsequent biochemical treatment; non-polar extractants and polar extractants are regenerated and recycled, avoiding the waste of extractants; two extractants, namely non-polar extractants and polar extractants, are adopted, the extraction is highly targeted and the extraction effect is good.

[0056] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A high concentration phenol ammonia wastewater treatment device, characterized in that: It comprises a pre-extraction tower (1), a regeneration tower (2), a deacidification tower (3), a deammoniation tower (4), a re-extraction tower (5), a phenol tower (6), a water tower (7) and a deacidification tower feed preheater (8); The upper end of the side wall of the pre-extraction tower (1) is provided with an inlet (11) for the amine phenol wastewater as a raw material, the lower end of the side wall is provided with an inlet (12) for the non-polar extractant and a non-polar extractant reflux port (13), the top is provided with a pre-extraction outlet (14), and the bottom is provided with a pre-extraction wastewater outlet (15); the side wall of the regeneration tower (2) is provided with a regeneration tower feed port (21), the top is provided with a non-polar extractant regeneration production port (22), and the bottom is provided with a tar production port (23); the side wall of the deacidification tower (3) is provided with a deacidification tower cold feed port (31) and a deacidification tower hot feed port (32), the top is provided with an acid gas outlet (33), and the bottom is provided with a deacidification wastewater outlet (34); the side wall of the deamination tower (4) is provided with a deamination tower feed port (41), the top is provided with an ammonia outlet (42), and the bottom is provided with a deamination wastewater outlet (34); The re-extraction tower (5) has a re-extraction tower feed port (51) at the upper end of the side wall, a polar extractant inlet (52) at the lower end of the side wall, a re-extractant extraction port (53) at the top, and a dephenolation wastewater outlet (54) at the bottom; the phenol tower (6) has a phenol tower feed port (61) at the side wall, a phenol tower polar extractant extraction port (62) at the top, and a crude phenol extraction port (63) at the bottom; the water tower (7) has a water tower feed port (71) at the side wall, a water tower polar extractant extraction port (72) at the top, and a water outlet (73) at the bottom; the deacidification tower feed preheater (8) has a pre-extraction wastewater heat exchange inlet (81), a pre-extraction wastewater heat exchange outlet (82), a deamination wastewater heat exchange inlet (83), and a deamination wastewater heat exchange outlet (84); The pre-extract outlet (14) is connected to the regeneration tower feed port (21), the non-polar extractant regeneration outlet (22) is connected to the non-polar extractant reflux port (13), the pre-extraction wastewater outlet (15) is respectively connected to the deacidification tower cold feed port (31) and the pre-extraction wastewater heat exchange inlet (81), the pre-extraction wastewater heat exchange outlet (82) is connected to the deacidification tower hot feed port (32), the deacidification wastewater outlet (34) is connected to the deamination tower feed port (41) The deamination wastewater outlet (43) is connected to the deamination wastewater heat exchange inlet (83), the deamination wastewater heat exchange outlet (84) is connected to the re-extraction tower feed port (51), the re-extraction product outlet (53) is connected to the phenol tower feed port (61), the dephenolation wastewater outlet (54) is connected to the water tower feed port (71), and the phenol tower polar extractant outlet (62) and the water tower polar extractant outlet (72) are both connected to the polar extractant inlet (52).

2. A high concentration phenol ammonia wastewater treatment device according to claim 1, characterized in that, The raw material acetaminophen wastewater inlet (11) is connected to the raw material acetaminophen wastewater input pipeline.

3. A high concentration phenol ammonia wastewater treatment device according to claim 2, characterized in that, The non-polar extractant inlet (12) is connected to a non-polar extractant input pipeline.

4. A high-concentration phenol-ammonia wastewater treatment device according to claim 3, characterized in that, The tar production outlet (23) is connected to a tar output pipeline.

5. A high-concentration phenol-ammonia wastewater treatment device according to claim 4, characterized in that, The acid gas outlet (33) is connected to an acid gas discharge pipeline.

6. A high concentration phenol ammonia wastewater treatment device according to claim 5, characterized in that: The ammonia outlet (42) is connected to an ammonia discharge pipeline.

7. A high concentration phenol ammonia wastewater treatment device according to claim 6, characterized in that: The polar extractant inlet (52) is connected to a polar extractant input pipeline.

8. A high concentration phenol ammonia wastewater treatment device according to claim 7, characterized in that: The crude phenol extraction outlet (63) is connected to a crude phenol output pipeline.

9. A high-concentration phenol-ammonia wastewater treatment device according to claim 8, characterized in that: The water outlet (73) is connected to a drainage pipe.

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