Amino acid production wastewater treatment device

Abstract

The utility model discloses a device for treating wastewater generated in amino acid production, which is used for treating acrolein synthesis wastewater and sequentially comprises a waste liquid storage tank, a regulating tank, a flocculation tank, a sedimentation tank, an anoxic tank, an aerobic tank, a physical adsorption filter tank, a clean water tank, a concentration device and a recovery tank along the treatment direction, the concentration device is arranged in front of the waste liquid storage pool and is respectively connected with the waste liquid storage pool and the recovery tank, and the adjusting pool is an alkaline liquid medicine adjusting pool. According to the utility model, the economic benefit and the flocculation effect are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to amino acid production, and more particularly, to an amino acid production wastewater treatment device. BACKGROUND

[0002] Amino acids are a class of amphoteric organic compounds containing basic amino groups and acidic carboxyl groups, and are the basic building blocks of biological functional macromolecules of proteins.

[0003] Amino acids have a wide range of uses, including but not limited to the food industry, medicine, feed industry, chemical industry, agriculture, and cosmetics.

[0004] There are many amino acid production processes, mainly divided into two types: chemical synthesis and microbial fermentation. A large amount of tail gas is generated during the production of amino acids.

[0005] In chemical synthesis, the propylene aldehyde synthesis process is an important process in the synthesis of amino acids. The propylene aldehyde synthesis process produces wastewater containing organic matter. The existing method for treating wastewater produced by the propylene aldehyde synthesis process is to sequentially pretreat, biologically treat, and post-treat the wastewater. The purpose of pretreatment is to remove impurities, suspended solids, and part of the organic matter in the wastewater (usually using a conditioning tank and a flocculation tank). Biological treatment converts wastewater into harmless measures by using the action of microorganisms (usually through aerobic and anaerobic tanks). Post-treatment is a further treatment of wastewater after biological treatment to remove residual impurities (usually through physical adsorption methods such as activated carbon and zeolite).

[0006] The existing treatment method for propylene aldehyde synthesis wastewater has the following defects:

[0007] (1) The propylene aldehyde synthesis wastewater is not recycled, which increases the processing burden of the treatment device.

[0008] (2) The dosing method in the flocculation tank is usually from the top to the bottom, which results in insufficient flocculation reaction in the flocculation tank and poor flocculation effect. SUMMARY

[0009] To solve the above problems, the utility model provides an amino acid production wastewater treatment device, which aims to improve at least one problem mentioned in the background art.

[0010] The application discloses an amino acid production generated wastewater treatment device for treating propenal synthesis wastewater, which comprises, in sequence along a treatment direction, a waste liquid storage pool, an adjusting pool, a flocculation pool, a sedimentation pool, an anoxic pool, an aerobic pool, a physical adsorption filter pool and a clean water pool, and further comprises a concentration device and a recovery tank.

[0011] Optionally, the concentration device is an extraction tower, and the bottom of the concentration device is connected with the waste liquid storage pool.

[0012] Optionally, the physical adsorption filter pool is a zeolite filter pool.

[0013] Optionally, the flocculation pool comprises a flocculation pool wall and a containing cavity surrounded by the flocculation pool wall, a sludge level line and a liquid level line are formed in the flocculation pool during operation, and the flocculation pool is further provided with a flocculation reaction uniform structure, which comprises a liquid medicine pipe, a distribution pipe and a plurality of spraying pipes arranged in sequence along a water flow direction, the liquid medicine pipe is connected with a liquid medicine bin, each spraying pipe is communicated with the distribution pipe through a connecting pipe, the liquid medicine pipe is connected with the distribution pipe, a plurality of upward spraying nozzles are equidistantly arranged on the spraying pipe, the spraying pipe is arranged in the containing cavity and located between the sludge level line and the liquid level line.

[0014] Optionally, the spraying pipe is located at a position slightly below the middle position between the sludge level line and the liquid level line.

[0015] Optionally, the distance between adjacent spraying pipes gradually increases along the water flow direction.

[0016] Optionally, the ratio of the distance between the subsequent adjacent spraying pipes to the distance between the previous adjacent spraying pipes is 1.2-2.

[0017] Compared with the prior art, the application has the following beneficial effects:

[0018] The concentration device arranged before the pretreatment improves the economic benefit and reduces the burden of subsequent pretreatment, biological treatment and physical adsorption treatment. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description.

[0020] Figure 1It is a kind of schematic diagram of wastewater treatment device structure for amino acid production provided by the utility model,

[0021] Figure 2 It is the schematic diagram of the overhead view of the flocculation tank provided by the utility model,

[0022] Figure 3 It is the schematic diagram of the vertical section of the flocculation tank provided by the utility model.

[0023] The sign explanation of drawing is as follows: 1, flocculation reaction uniform structure, 2, liquid medicine pipe, 3, flocculation tank wall, 4, containing cavity, 5, sludge level line, 6, liquid level line, 7, distribution pipe, 8, spray pipe, 9, connecting pipe, 10, spray head. Specific implementation

[0024] In the description of the utility model, it needs to be explained that, unless there is explicit provision and limitation, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixed connection, can be indirectly connected through intermediate medium, can be the communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0025] In the description of the utility model, it needs to be understood that the terms "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or positional relationship shown in the drawing, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In the description of the utility model, the meaning of "a plurality of" is two or more than two, unless there is another accurate and specific provision.

[0026] The terms "first", "second", "third", "fourth" and the like (if any) in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a particular order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0027] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0028] The technical solutions of the present application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described in some embodiments.

[0029] Please refer to Figures 1-3 , Figure 1 A structural schematic diagram of the wastewater treatment device for amino acid production provided by the present application, Figure 2 A top view schematic diagram of the flocculation tank provided by the present application, Figure 3 A vertical section schematic diagram of the flocculation tank provided by the present application.

[0030] A wastewater treatment device for amino acid production, sequentially comprising a concentration device, a waste liquid storage tank, an alkaline liquid adjusting tank, a flocculation tank, a sedimentation tank, an anoxic tank, an aerobic tank, a physical adsorption filter tank and a clean water tank. The wastewater treatment device for amino acid production further comprises a recovery tank, and the concentration device is connected with the waste liquid storage tank and the recovery tank respectively.

[0031] In the acrolein synthesis reaction, the reaction raw materials are propylene, air and water. Therefore, in the acrolein synthesis wastewater, the content of acrylic acid in the organic matter contained therein is relatively high. Therefore, the concentration device and the recovery tank are added to recover the high-purity acrylic acid after concentration. The recovered acrylic acid can be sold. The wastewater after concentration treatment still contains acrylic acid, so the adjusting tank is an alkaline liquid adjusting tank, and the adjusting tank is adjusted to be neutral.

[0032] By first concentrating and recovering acrylic acid from the acrolein synthesis wastewater, on the one hand, the economic benefit is improved, and on the other hand, the burden of subsequent pretreatment, biological treatment and physical adsorption treatment is reduced.

[0033] In the synthesis wastewater treatment, the wastewater after concentration treatment by the concentration device enters the waste liquid storage tank. After the wastewater in the waste liquid storage tank accumulates to a certain liquid level, the wastewater is sequentially discharged to the alkaline liquid adjusting tank, the flocculation tank, the sedimentation tank, the anoxic tank, the aerobic tank, the physical adsorption filter tank and the clean water tank for continuous treatment. When the wastewater in the waste liquid storage tank is reduced to a certain liquid level, the treatment is stopped. The subsequent steps are repeated according to the above steps.

[0034] The waste liquid storage pool realizes the storage function and the separation function at the same time.

[0035] In one or more embodiments, the concentration device is an extraction tower, and the extractant is water, and in particular, the bottom of the concentration device is connected with the waste liquid storage pool.

[0036] In one or more embodiments, the physical adsorption filter pool is a zeolite filter pool.

[0037] In one or more embodiments, in order to make the flocculation reaction uniform, the flocculation pool comprises a flocculation pool wall 3 and a containing cavity 4 surrounded by the flocculation pool wall, a sludge level line 5 and a liquid level line 6 are formed during the operation of the flocculation pool, and the flocculation pool is further provided with a flocculation reaction uniform structure 1, which comprises a liquid medicine pipe 2, a distribution pipe 7 and a plurality of spraying pipes 8 arranged in sequence along the water flow direction, the liquid medicine pipe 2 is connected with a liquid medicine bin (not shown in the figure), each spraying pipe 8 is communicated with the distribution pipe 7 through a connecting pipe 9, the liquid medicine pipe 2 is connected with the distribution pipe 7, a plurality of upward spraying nozzles 10 are equidistantly arranged on the spraying pipe 8, the spraying pipe 8 is arranged in the containing cavity 4 and located between the sludge level line 5 and the liquid level line 6.

[0038] By arranging the spraying pipe 8 along the water flow direction, the liquid medicine is distributed along the entire water flow direction, the uniformity of the flocculation reaction is improved, and the load of the subsequent treatment process is reduced. At the same time, the spraying pipe 8 is arranged between the sludge level line 5 and the liquid level line 6 and sprays upward, at this time, the sprayed liquid medicine is in the middle section in the depth direction of the wastewater, at this time, part of the liquid medicine flows against the flocculation material under the spraying force and fully mixes, while the other part of the liquid medicine flows downward and reacts with the flocculation liquid flowing upward and remaining unreacted under the spraying pipe 8, and the liquid medicine at the liquid surface position is less (because the weight of the to-be-reacted substance is greater than that of water, therefore the to-be-reacted substance at the liquid surface position is less), and the liquid medicine is fully utilized.

[0039] Those skilled in the art should understand that the sludge level line 5 and the liquid level line 6 can be obtained by measuring the values of the two level lines multiple times and then weightedly averaging.

[0040] In one or more embodiments, the spraying pipe 8 is fixed on the flocculation pool wall 3, and the liquid medicine pipe 2 and the distribution pipe 7 are located outside the containing cavity 4.

[0041] In one or more embodiments, in order to obtain a better flocculation effect, the spraying pipe 8 is located at a position lower than the middle position between the sludge level line 5 and the liquid level line 6.

[0042] In one or more embodiments, in order to obtain better flocculation effect, the distance between adjacent spray pipes 8 gradually increases along the water flow direction. At this time, because the wastewater to be treated at the rear spray pipe 8 has been partially reacted at the front spray pipe 8, the concentration of the wastewater to be treated at the rear spray pipe 8 is lower than that at the previous position, and less liquid medicine is suitable for lower concentration.

[0043] In one or more embodiments, in order to obtain better flocculation effect, the ratio of the distance between the adjacent spray pipes 8 along the water flow direction to the distance between the previous adjacent spray pipes 8 is 1.2-2, at this time, better flocculation effect can be obtained.

[0044] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An amino acid production waste water treatment apparatus for treating acrolein synthesis waste water, comprising, in order along a treatment direction, a waste liquid storage tank, a conditioning tank, a flocculation tank, a sedimentation tank, an anoxic tank, an aerobic tank, a physical adsorption filter tank, and a clear water tank, characterized by comprising, in order along the treatment direction, a first pH adjustment tank, a second pH adjustment tank, and a third pH adjustment tank between the conditioning tank and the flocculation tank. The amino acid production waste water treatment device further comprises a concentration device and a recovery tank, the concentration device is arranged in front of the waste liquid storage pool, and the concentration device is connected with the waste liquid storage pool and the recovery tank respectively.

2. The apparatus for treating wastewater produced by the production of amino acids according to claim 1, characterized by, The concentration device is an extraction tower, and the bottom of the concentration device is connected with the waste liquid storage pool.

3. The apparatus for treating wastewater generated by production of amino acids according to claim 1, wherein The physical adsorption filter tank is a zeolite filter tank.

4. The apparatus for treating wastewater generated by production of amino acids according to claim 1, wherein The flocculation tank comprises a flocculation tank wall (3) and a containing cavity (4) surrounded by the flocculation tank wall, a sludge level line (5) and a liquid level line (6) are formed in the flocculation tank during operation, and the flocculation tank is further provided with a flocculation reaction uniform structure (1), the flocculation reaction uniform structure (1) comprises a liquid pipe (2), a distribution pipe (7) and a plurality of spraying pipes (8) arranged in sequence along the water flow direction, the liquid pipe (2) is connected with the liquid warehouse, each spraying pipe (8) is communicated with the distribution pipe (7) through a connecting pipe (9), the liquid pipe (2) is connected with the distribution pipe (7), a plurality of upward spraying nozzles (10) are equidistantly arranged on the spraying pipe (8), the spraying pipe (8) is arranged in the containing cavity (4) and located between the sludge level line (5) and the liquid level line (6).

5. The apparatus for treating wastewater produced by the production of amino acids according to claim 4, characterized by, The spraying pipe (8) is located at a position below the middle position of the sludge level line (5) and the liquid level line (6).

6. The apparatus for treating wastewater generated by production of amino acids according to claim 4, wherein The distance between adjacent spraying pipes (8) gradually increases along the water flow direction.

7. The amino acid production waste water treatment apparatus according to claim 6, wherein The ratio of the distance between the latter adjacent spraying pipes (8) to the distance between the former adjacent spraying pipes (8) is 1.2-2.

Images