High-organic-matter-content wastewater treatment system

Abstract

A high organic matter content wastewater treatment system comprises an electrolyzer and an evaporator, a cylindrical filter mesh cage is arranged in the electrolyzer, the filter mesh cage is fixedly connected with the top position in the electrolyzer, the top of the electrolyzer is communicated with a wastewater inlet pipe, the wastewater inlet pipe is located on the upper portion of the filter mesh cage, and the evaporator is located on the upper portion of the filter mesh cage. An electrolytic anode and an electrolytic cathode are arranged on the two sides of the filter mesh cage respectively, a stirring device is arranged in the filter mesh cage, the other end of the liquid outlet pipe is communicated with the top of the evaporator, the top of the evaporator is communicated with a demulsifying agent adding pipe, and an electric heating plate is arranged on the inner side of the evaporator. According to the invention, wastewater is electrolyzed in the electrolyzer, so that an organic solvent with relatively large molecular weight can be degraded and split, and the organic solvent with relatively large molecular weight can be conveniently degraded into an organic matter with relatively small molecular weight, so that the organic solvent can be conveniently removed in a subsequent evaporator; the treatment cost of the chemical wastewater is effectively reduced.

Description

Technical Field

[0001] The invention belongs to the field of wastewater treatment, in particular to a system for treating wastewater with high organic matter content. Background Art

[0002] Wastewater is one of the important sources of environmental pollution today. Industrial wastewater, especially wastewater generated in chemical production processes, contains a large amount of organic solvents and heavy metal ions, which causes much greater environmental pollution to soil, groundwater, river water, etc. than domestic wastewater. Therefore, existing chemical wastewater needs to undergo environmental protection treatment before it can be discharged or recycled. At present, for wastewater with a high organic solvent content, when treating organic solvents with smaller molecular weights such as methanol and ethanol, these organic solvents with smaller molecular weights can be distilled out from the wastewater by negative pressure distillation due to their lower boiling points, thereby conveniently completing the removal of organic solvents with smaller molecular weights in the wastewater. However, organic solvents with larger molecular weights often require distillation operations for separation, which greatly increases the equipment and operating costs of wastewater treatment. Summary of the Invention

[0003] The present invention provides a high-organic matter content wastewater treatment system to solve the defects in the prior art.

[0004] The present invention is achieved through the following technical solutions:

[0005] A high-organic matter content wastewater treatment system comprises an electrolyzer and an evaporator, wherein a cylindrical filter cage is provided in the electrolyzer, the filter cage is fixedly connected to the top position of the electrolyzer, the top of the electrolyzer is communicated with a wastewater inlet pipe, the wastewater inlet pipe is located at the upper part of the filter cage, an electrolysis anode and an electrolysis cathode are respectively provided on both sides of the filter cage, a stirring device is provided in the filter cage, the bottom of the electrolyzer is communicated with one end of a liquid outlet pipe, a liquid outlet valve and a liquid outlet pump are provided on the liquid outlet pipe, the other end of the liquid outlet pipe is communicated with the top of the evaporator, the top of the evaporator is communicated with a demulsifier addition pipe, an electric heating plate is provided on the inner side of the evaporator, a temperature sensor is provided at the lower part of the evaporator, the top of the evaporator is communicated with a negative pressure pipe, a negative pressure pump is provided on the negative pressure pipe, the bottom of the evaporator is communicated with a liquid separation outlet pipe, and a liquid separation outlet valve and a liquid separation outlet pump are provided on the liquid separation outlet pipe.

[0006] The high organic matter content wastewater treatment system as described above, wherein the stirring device includes a motor arranged at the center of the top of the electrolyzer, the output shaft of the motor is fixedly connected to the top of the vertically arranged rotating shaft, the rotating shaft is connected to the inner ring of the first bearing, the outer ring of the second bearing is fixedly connected to the middle of the top of the electrolyzer, the bottom of the rotating shaft is fixedly connected to the inner ring of the second bearing, the outer ring of the second bearing is fixedly connected to the center of the bottom of the filter cage, the outer periphery of the rotating shaft is provided with a sleeve, the outer periphery of the rotating shaft is provided with an external thread, and the inner periphery of the sleeve is provided with an external thread. An internal thread is provided at the top, the rotating shaft is threadedly connected to the sleeve, vertical rods are respectively provided on both sides of the rotating shaft, vertical holes are provided at the corresponding positions of the sleeve and the vertical rods, the vertical rods can pass through the vertical holes, a rotating drum is provided on the outer periphery of the sleeve, the top of the rotating drum is rotatably connected to the middle of the top of the electrolyzer through a third bearing, the bottom of the rotating drum is rotatably connected to the bottom of the filter cage through a fourth bearing, an external thread is provided on the outer periphery of the sleeve, an internal thread is provided in the rotating drum, the sleeve can be threadedly connected to the rotating drum, and an array of stirring blades are provided on the outer periphery of the rotating drum from top to bottom.

[0007] As described above, in a high-organic matter content wastewater treatment system, a tip is provided at the end of the stirring blade away from the rotating drum, a scraper is provided above and below the tip, the scraper is fixedly connected to one end of the connecting plate, the other end of the connecting plate is fixedly connected to the outer ring of the fifth bearing, and the inner ring of the fifth bearing is fixedly connected to the connection between the tip and the stirring blade.

[0008] In the high organic matter content wastewater treatment system as described above, the bottom of the filter cage is connected to the first impurity discharge pipe, and the first impurity discharge pipe is provided with a first impurity discharge valve and a first impurity discharge pump.

[0009] In the above-mentioned system for treating wastewater with high organic content, a filter is provided at the connection point between the electrolyzer and the liquid outlet pipe.

[0010] In the high organic matter content wastewater treatment system as described above, the bottom of the electrolyzer is connected to the second impurity discharge pipe, and the second impurity discharge pipe is provided with a second impurity discharge valve and a second impurity discharge pump.

[0011] In the high organic matter content wastewater treatment system as described above, a one-way valve is provided on the demulsifier addition pipe.

[0012] In the above-mentioned system for treating wastewater with high organic matter content, an oscillator is provided at the bottom of the evaporator.

[0013] In the high organic matter content wastewater treatment system as described above, an observation window is vertically provided on the side of the evaporator.

[0014] The advantages of the present invention are: the present invention can degrade and split organic solvents with larger molecular weight by electrolyzing wastewater in an electrolyzer, thereby conveniently degrading organic solvents with larger molecular weight into organic matter with smaller molecular weight, thereby facilitating the removal of organic solvents in a subsequent evaporator, and effectively reducing the treatment cost of chemical wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 It is a schematic structural diagram of the present invention;

[0017] Figure 2 yes Figure 1 A partial enlarged view of part I;

[0018] Figure 3 yes Figure 1 A partial enlarged view of Part II;

[0019] Figure 4 yes Figure 1 A partial enlarged view of Part III.

[0020] Reference numerals: 1, electrolyzer; 2, evaporator; 3, filter cage; 4, wastewater inlet pipe; 5, electrolysis anode; 6, electrolysis cathode; 7, liquid outlet pipe; 8, liquid outlet valve; 9, liquid outlet pump; 10, demulsifier addition pipe; 11, electric heating plate; 12, temperature sensor; 13, negative pressure pipe; 14, negative pressure pump; 15, liquid separation outlet pipe; 16, liquid separation outlet valve; 17, liquid separation outlet pump; 18, motor; 19, rotating shaft; 20, first bearing; 21, second bearing; 22, casing; 23. Vertical rod; 24. Vertical hole; 25. Rotating drum; 26. Third bearing; 27. Fourth bearing; 28. Stirring blade; 29. Tip; 30. Scraper; 31. Connecting plate; 32. Fifth bearing; 33. First impurity discharge pipe; 34. First impurity discharge valve; 35. First impurity discharge pump; 36. Filter; 37. Second impurity discharge pipe; 38. Second impurity discharge valve; 39. Second impurity discharge pump; 40. One-way valve; 41. Oscillator; 42. Observation window. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0022] A high-organic matter content wastewater treatment system includes an electrolyzer 1 and an evaporator 2. A cylindrical filter cage 3 is provided in the electrolyzer 1. The filter cage 3 is fixedly connected to the top position of the electrolyzer 1. The top of the electrolyzer 1 is connected to the wastewater inlet pipe 4. The wastewater inlet pipe 4 is located on the upper part of the filter cage 3. An electrolysis anode 5 and an electrolysis cathode 6 are respectively provided on both sides of the filter cage 3. A stirring device is provided in the filter cage 3. The bottom of the electrolyzer 1 is connected to one end of the liquid outlet pipe 7. The outlet pipe 7 is connected to the bottom of the electrolyzer 1. A liquid outlet valve 8 and a liquid outlet pump 9 are provided on the liquid pipe 7, the other end of the liquid outlet pipe 7 is connected to the top of the evaporator 2, the top of the evaporator 2 is connected to the demulsifier addition pipe 10, an electric heating plate 11 is provided on the inner side of the evaporator 2, a temperature sensor 12 is provided on the lower part of the evaporator, the top of the evaporator 2 is connected to the negative pressure pipe 13, a negative pressure pump 14 is provided on the negative pressure pipe 13, the bottom of the evaporator 2 is connected to the liquid separation pipe 15, and a liquid separation valve 16 and a liquid separation pump 17 are provided on the liquid separation pipe 15. When the present invention is in use, wastewater is pumped into the electrolyzer 1 through the wastewater inlet pipe 4, and then the electrolysis anode 5 and the electrolysis cathode 6 are energized and the stirring device is started, thereby degrading the organic solvent with a higher molecular weight in the wastewater. At the same time, the wastewater containing more metal ions is solidified near the cathode, and the solidified solid matter is confined in the filter cage 3, which is convenient for subsequent recovery and utilization. After the electrolysis is completed, the liquid outlet valve 8 and the liquid outlet pump 9 are opened to transfer the electrolyzed wastewater to the evaporator 2 through the liquid outlet pipe 7, and then the electric heating plate 11 is turned on to monitor the temperature change in real time through the temperature sensor 12, and the boiling point of the organic solvent with a smaller molecular weight is reduced by turning on the negative pressure pump to accelerate its evaporation. Evaporation efficiency. After evaporating the organic solvent with a smaller molecular weight, the addition of a demulsifier can complete the water-emulsion separation and separate the organic solvent with a higher boiling point and insoluble in water. Since the water solubility of the organic solvent with a smaller molecular weight is generally better, and the water solubility of the organic solvent with a larger molecular weight is generally poorer, after most of the organic solvent with a smaller molecular weight is removed, most of the remaining organic solvent has very poor water solubility, so an organic layer and a water layer can be formed. Then, by opening the liquid separation valve 16 and the liquid separation pump 17, the organic layer and the water layer are separated and discharged, thereby obtaining treated water. After actual use, it has been verified that the environmental protection compliance rate of the wastewater treated by the present invention exceeds 98%.

[0023] Specifically, since a thicker adhesion layer may be formed on the surface of the electrolytic anode 5 and the electrolytic cathode 6 during long-term use, thereby affecting their use, in order to overcome the above problem, the stirring device described in this embodiment includes a motor 18 arranged at the top center of the electrolyzer 1, and the motor 18 is a servo motor which can rotate forward and reverse. The output shaft of the motor 18 is fixedly connected to the top of the vertically arranged rotating shaft 19, and the rotating shaft 19 is connected to the inner ring of the first bearing 20. The outer ring of the second bearing 20 is fixedly connected to the middle of the top of the electrolyzer 1, and the bottom of the rotating shaft 1 is fixedly connected to the inner ring of the second bearing 21. The outer ring of the second bearing 21 is fixedly connected to the central position of the bottom inner of the filter cage 3. A sleeve 22 is provided on the outer periphery of the rotating shaft 19. An external thread is provided on the outer periphery of the rotating shaft 19, an internal thread is provided on the interior of the sleeve 22, the rotating shaft 19 is threadedly connected to the sleeve 22, vertical rods 23 are respectively provided on both sides of the rotating shaft 19, vertical holes 24 are provided at the corresponding positions of the sleeve 22 and the vertical rod 23, and the vertical rod 23 can pass through the vertical holes 24, a rotating drum 25 is provided on the outer periphery of the sleeve 22, the top of the rotating drum 25 is rotatably connected to the middle of the top of the electrolyzer 1 through a third bearing 26, and the bottom of the rotating drum 25 is rotatably connected to the bottom of the filter cage 3 through a fourth bearing 27, an external thread is provided on the outer periphery of the sleeve 22, an internal thread is provided inside the rotating drum 25, the sleeve 22 can be threadedly connected to the rotating drum 25, and an array of stirring blades 28 are provided on the outer periphery of the rotating drum 25 from top to bottom. In the present invention, the motor 18 drives the rotating shaft 19 to rotate, and the rotation of the rotating shaft 19 drives the sleeve 22 to move up and down. The up and down movement of the sleeve 22 can drive the rotating drum 25 to rotate, thereby driving the stirring blade 28 to rotate, so that the tip 29 can contact the adhesion layer on the surface of the electrolytic anode 5 and the electrolytic cathode 6 and destroy its structure. At the same time, the rotation of the stirring blade 28 can accelerate the detachment efficiency of the adhesion layer on the surface of the electrolytic anode 5 and the electrolytic cathode 6 after the destruction while stirring. At the same time, the above-mentioned rotating device can effectively play the role of deceleration and torque increase, thereby ensuring its long-term stable use.

[0024] Specifically, the stirring blade 28 of this embodiment is provided with a tip 29 at one end away from the rotating drum 25. A scraper 30 is provided above and below the tip 29. The scraper 30 is fixedly connected to one end of a connecting plate 31. The other end of the connecting plate 31 is fixedly connected to the outer ring of a fifth bearing 32. The inner ring of the fifth bearing 32 is fixedly connected to the connection between the tip 29 and the stirring blade 28. The scraper 30 of the present invention can quickly scrape off the adhesion layer on the surfaces of the electrolytic anode 5 and the electrolytic cathode 6 that has been damaged by the tip 29, thereby facilitating use.

[0025] More specifically, the bottom of the filter cage 3 of this embodiment is connected to a first impurity discharge pipe 33, which is provided with a first impurity discharge valve 34 and a first impurity discharge pump 35. After a period of use, the present invention allows wastewater to be introduced through the wastewater inlet pipe 4, and then the stirring device, first impurity discharge valve 34, and first impurity discharge pump 35 are activated to discharge impurities from the filter cage 3. The wastewater is then filtered and returned for treatment, eliminating the need to add new rinse water, thus facilitating use.

[0026] More specifically, a filter screen 36 is provided at the connection point between the electrolyzer 1 and the liquid outlet pipe 7. The filter screen 36 can prevent solid particles formed in the filter cage 3 from entering the evaporator 2, facilitating use.

[0027] Furthermore, the bottom of the electrolyzer 1 described in this embodiment is connected to a second impurity discharge pipe 37, and a second impurity discharge valve 38 and a second impurity discharge pump 39 are provided on the second impurity discharge pipe 37. The present invention facilitates use by adding wastewater to the electrolyzer 1 and discharging solid impurities located outside the filter cage 3 in the electrolyzer 1 by opening the second impurity discharge valve 38 and the second impurity discharge pump 39.

[0028] Furthermore, the demulsifier addition pipe 10 of this embodiment is provided with a one-way valve 40. The one-way valve 40 of the present invention can ensure the sealing efficiency during negative pressure operation and is easy to use.

[0029] Furthermore, an oscillator 41 is provided at the bottom of the evaporator 2 in this embodiment. The oscillator 41 in the present invention can accelerate the mixing of the demulsifier and the wastewater and accelerate the separation of the water layer and the organic layer, which is convenient for use.

[0030] Furthermore, the evaporator 2 of this embodiment is provided with an observation window 42 vertically on its side. The present invention can conveniently see the boundary between the water layer and the organic layer through the observation window 42, which is convenient for subsequent liquid separation operations.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A high organic matter content wastewater treatment system, characterized by: The invention comprises an electrolyzer (1) and an evaporator (2), wherein a cylindrical filter cage (3) is arranged in the electrolyzer (1), wherein the filter cage (3) is fixedly connected to the top position of the electrolyzer (1), wherein the top of the electrolyzer (1) is connected to a wastewater inlet pipe (4), wherein the wastewater inlet pipe (4) is located at the upper part of the filter cage (3), wherein an electrolysis anode (5) and an electrolysis cathode (6) are respectively arranged on both sides of the filter cage (3), wherein a stirring device is arranged in the filter cage (3), wherein the bottom of the electrolyzer (1) is connected to one end of a liquid outlet pipe (7), wherein a liquid outlet pipe (7) is provided. The invention relates to a liquid discharging device comprising a valve (8) and a liquid outlet pump (9), the other end of the liquid outlet pipe (7) is connected to the top of the evaporator (2), the top of the evaporator (2) is connected to the demulsifier addition pipe (10), an electric heating plate (11) is provided on the inner side of the evaporator (2), a temperature sensor (12) is provided on the lower inner part of the evaporator, the top of the evaporator (2) is connected to the negative pressure pipe (13), a negative pressure pump (14) is provided on the negative pressure pipe (13), the bottom of the evaporator (2) is connected to the liquid outlet pipe (15), and the liquid outlet valve (16) and the liquid outlet pump (17) are provided on the liquid outlet pipe (15).

2. A high organic matter content wastewater treatment system according to claim 1, characterized in that: The stirring device comprises a motor (18) arranged at the center of the top of the electrolyzer (1), the output shaft of the motor (18) is fixedly connected to the top of a vertically arranged rotating shaft (19), the rotating shaft (19) is connected to the inner ring of a first bearing (20), the outer ring of the second bearing (20) is fixedly connected to the middle of the top of the electrolyzer (1), the bottom of the rotating shaft (1) is fixedly connected to the inner ring of the second bearing (21), the outer ring of the second bearing (21) is fixedly connected to the center of the bottom of the filter cage (3), the outer periphery of the rotating shaft (19) is provided with a sleeve (22), the outer periphery of the rotating shaft (19) is provided with an external thread, the interior of the sleeve (22) is provided with an internal thread, and the threads of the rotating shaft (19) and the sleeve (22) are fixedly connected. The rotating shaft (19) is connected, vertical rods (23) are respectively provided on both sides of the rotating shaft (19), vertical holes (24) are provided at corresponding positions of the sleeve (22) and the vertical rod (23), and the vertical rod (23) can pass through the vertical hole (24), a rotating drum (25) is provided on the outer periphery of the sleeve (22), the top of the rotating drum (25) is rotatably connected to the middle of the top of the electrolyzer (1) through a third bearing (26), and the bottom of the rotating drum (25) is rotatably connected to the bottom of the filter cage (3) through a fourth bearing (27), an external thread is provided on the outer periphery of the sleeve (22), an internal thread is provided in the rotating drum (25), the sleeve (22) can be threadedly connected to the rotating drum (25), and an array of stirring blades (28) are provided on the outer periphery of the rotating drum (25) from top to bottom.

3. A high organic matter content wastewater treatment system according to claim 2, characterized in that: A tip (29) is provided at one end of the stirring blade (28) away from the rotating drum (25), and a scraper (30) is provided above and below the tip (29). The scraper (30) is fixedly connected to one end of a connecting plate (31), and the other end of the connecting plate (31) is fixedly connected to the outer ring of a fifth bearing (32). The inner ring of the fifth bearing (32) is fixedly connected to the connection between the tip (29) and the stirring blade (28).

4. A high organic matter content wastewater treatment system according to claim 1, characterized in that: The bottom of the filter cage (3) is communicated with a first impurity discharge pipe (33), and a first impurity discharge valve (34) and a first impurity discharge pump (35) are provided on the first impurity discharge pipe (33).

5. The high organic matter content wastewater treatment system according to claim 1, characterized in that: A filter screen (36) is provided at the connection point between the electrolyzer (1) and the liquid outlet pipe (7).

6. A high organic matter content wastewater treatment system according to claim 5, characterized in that: The bottom of the electrolyzer (1) is communicated with a second impurity discharge pipe (37), and a second impurity discharge valve (38) and a second impurity discharge pump (39) are provided on the second impurity discharge pipe (37).

7. The high organic matter content wastewater treatment system according to claim 1, characterized in that: A one-way valve (40) is provided on the demulsifier addition pipe (10).

8. The high organic matter content wastewater treatment system according to claim 1, characterized in that: An oscillator (41) is provided at the bottom of the evaporator (2).

9. The high organic matter content wastewater treatment system according to claim 1, characterized in that: An observation window (42) is vertically arranged on the side of the evaporator (2).

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