Triple-effect evaporator applied to waste liquid treatment, waste liquid treatment system and waste liquid treatment method

Abstract

The invention discloses a triple-effect evaporator applied to waste liquid treatment and a waste liquid treatment system and method.The triple-effect evaporator comprises a plurality of separators, one side of each separator is connected with a heat exchange medium input assembly used for inputting steam and waste liquid, and the inner wall of each separator is provided with a spiral evaporation conveying channel; the middle part of the separator is provided with a lifting floating assembly for sensing the volume of the waste liquid in the separator, and the separator is provided with a spiral conveying channel for increasing the contact area of the waste liquid and the steam, so that part of the waste liquid which is not completely reacted can be semi-crystallized in the flowing process of the waste liquid in the spiral conveying channel; therefore, the reverse U-shaped baffle can adhere to the semi-crystalline waste liquid and gradually flow back to the spiral conveying channel, and meanwhile, the lifting floating assembly is arranged to be matched with the flow control ball valve assembly to control input of the waste liquid, so that the storage amount of the internal waste liquid is controlled, and the reaction effect is guaranteed.

Description

Technical Field

[0001] The invention relates to a triple-effect evaporator used for waste liquid treatment, and in particular to a triple-effect evaporator used for waste liquid treatment, a waste liquid treatment system and a waste liquid treatment method. Background Art

[0002] The waste liquid triple-effect evaporator is a highly efficient waste liquid treatment equipment, which is mainly used to evaporate the water in the waste liquid multiple times, so as to achieve the concentration and recovery of the waste liquid. The equipment gradually improves the concentration of the waste liquid through a multi-stage evaporation system, reduces energy consumption, and reduces the demand for natural water resources. Therefore, since the waste liquid inside the reactor gathers together, the contact area with the steam is reduced, the reaction efficiency is low, and since the waste liquid is continuously transported to the reactor, the waste liquid capacity inside the reactor gradually increases, and the waste liquid at the bottom is difficult to evaporate. Therefore, it is necessary to design a structure to improve the evaporation efficiency and control the waste liquid flow rate in order to address the above problems.

[0003] The existing three-effect evaporator used for waste liquid treatment needs to be further improved. Summary of the invention

[0004] The purpose of the present invention is to provide a triple-effect evaporator for waste liquid treatment, which is provided with a spiral conveying channel to increase the contact area between waste liquid and steam, improve reaction efficiency and reaction time, and can return semi-crystallized waste liquid that has not been completely reacted to the spiral conveying channel. At the same time, a structure for controlling the waste liquid capacity inside the reactor is also provided to ensure that the spiral conveying channel has a certain flow space to prevent complete immersion.

[0005] In order to achieve the above object, the present invention adopts the following scheme:

[0006] A triple-effect evaporator for waste liquid treatment comprises a plurality of separators, one side of the separator is connected to a heat exchange medium input assembly for inputting steam and waste liquid, a waste liquid reflux pipe is arranged between the bottom of the separator and the bottom of the heat exchange medium input assembly, a spiral evaporation conveying channel is arranged on the inner wall of the separator, a U-shaped top cover for reflux of waste liquid is arranged above the spiral evaporation conveying channel, a lifting and floating assembly for sensing the waste liquid in the separator is arranged in the middle part, a flow control ball valve assembly is arranged in the middle of the waste liquid reflux pipe, a speed control damping device for controlling the lifting and lowering speed of the lifting and floating assembly is arranged at the lower end of the separator, a transmission assembly is arranged between the lifting and floating assembly and the flow control ball valve assembly, and the transmission assembly can control the flow size of the flow control ball valve assembly according to the lifting height of the lifting and floating assembly.

[0007] Furthermore, the heat exchange medium input component includes a heat exchanger body, an input pipe is arranged between the heat exchanger body and the separator, a steam input end is arranged on one side of the heat exchanger body, and the bottom of the waste liquid reflux pipe is connected to the waste liquid input end.

[0008] Furthermore, a steam delivery pipe is provided between two adjacent separators and the heat exchange medium input assembly;

[0009] The U-shaped top cover is arranged along the path of the spiral evaporation conveying channel.

[0010] Furthermore, the U-shaped top cover includes an upper arc-shaped cover, and both ends of the upper arc-shaped cover are provided with guide cross plates extending toward the inner side of the spiral evaporation conveying channel, and the guide cross plates are used to fix the waste liquid that is semi-crystallized to the upper arc-shaped cover to flow back to the spiral evaporation conveying channel below for re-evaporation.

[0011] Furthermore, a steam delivery side opening is provided between the U-shaped top cover and the spiral evaporation delivery channel.

[0012] Furthermore, the lifting and floating assembly includes a plurality of sealing guide shaft holes arranged at the bottom of the separator, a sealing guide shaft is movably arranged in the sealing guide shaft hole, a floating structure is arranged between the upper ends of the plurality of sealing guide shafts, and the density of the floating structure is less than the density of the waste liquid.

[0013] Furthermore, the floating structure is made of low-density polyethylene, ethylene-vinyl acetate copolymer, polystyrene foam material, polyester material or a floating plate stainless steel structure.

[0014] Furthermore, the flow control ball valve assembly comprises a ball valve housing arranged on the waste liquid return pipe, and a flow control ball valve is rotatably arranged in the ball valve housing.

[0015] Furthermore, the speed control damping device includes a damping valve body arranged at the bottom of the separator, a lifting annular plate is connected between the lower ends of the plurality of sealing guide shafts, a blocking plate is arranged in the middle of the damping valve body, the blocking plate divides the interior of the damping valve body into two upper and lower valve chambers, a piston plate is arranged in each of the two valve chambers, a vertical axis hole is arranged in the middle of the blocking plate, a vertical axis body is connected between the two piston plates, the vertical axis body extends to the bottom of the damping valve body and is fixedly connected to the lifting annular plate, a through hole is arranged on the blocking plate, when the two piston plates move up and down synchronously, the medium in the two valve chambers will be transferred from one of them to the other through the through hole, and the up and down movement speed of the piston plate is controlled by the diameter of the through hole.

[0016] Furthermore, the transmission assembly includes a transmission shaft arranged on one side of the quantity control ball valve and extending to the outside of the ball valve housing, a transmission gear is arranged at the outer end of the transmission shaft, a driving rack is arranged on the lifting annular plate, and the driving rack and the transmission gear are meshed for transmission.

[0017] A waste liquid treatment system comprises any one of the triple-effect evaporators described above.

[0018] A method for treating waste liquid comprises the following steps: inputting the waste liquid into any one of the above-mentioned triple-effect evaporators for evaporation treatment.

[0019] In summary, the present invention has the following beneficial effects compared with the prior art:

[0020] The present invention solves the shortcomings of the existing triple-effect evaporator used for waste liquid treatment. Through the structural setting of the present invention, it has the following advantages: a spiral conveying channel is provided to increase the contact area between the waste liquid and the steam, the contact area between the waste liquid and the steam becomes larger, the flow stroke of the waste liquid becomes longer, and the reaction efficiency and reaction time are improved. Since some of the waste liquid that has not been completely reacted will be semi-crystallized during the flow of the waste liquid in the spiral conveying channel, a reverse U-shaped baffle is provided to adhere to the semi-crystallized waste liquid and gradually flow back to the spiral conveying channel. At the same time, a lifting and floating assembly is provided to cooperate with a flow control ball valve assembly to control the input of the waste liquid, so as to achieve the control of the internal waste liquid storage amount and ensure the reaction effect. At the same time, since the boiling waste liquid affects the up and down floating amplitude of the lifting and floating assembly, a damping device is provided to ensure the stability and accuracy of the lifting and floating assembly, and ensure that the adjustment flow amplitude fed back by the transmission assembly is more accurate and stable, and the structure is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a triple-effect evaporator of the present invention;

[0022] Figure 2 It is one of the structural schematic diagrams of the present invention;

[0023] Figure 3 for Figure 2 Schematic diagram of the waste liquid semi-crystal reflux structure at A;

[0024] Figure 4 A perspective view of the present invention;

[0025] Figure 5 This is the second structural schematic diagram of the present invention;

[0026] Figure 6 This is the third structural schematic diagram of the present invention;

[0027] Figure 7 for Figure 6 A partial enlarged view of point B. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-7 The present invention provides a triple-effect evaporator for waste liquid treatment, comprising a plurality of separators 1, one side of the separator 1 is connected with a heat exchange medium input component 2 for inputting steam and waste liquid, a waste liquid return pipe 200 is arranged between the bottom of the separator 1 and the bottom of the heat exchange medium input component 2, characterized in that: a spiral evaporation delivery channel 8 is arranged on the inner wall of the separator 1, a U-shaped top cover 3 for reflowing waste liquid is arranged above the spiral evaporation delivery channel 8, a lifting and floating component 4 for sensing the waste liquid in the inner volume of the separator 1 is arranged in the middle of the separator 1, a flow control ball valve component 5 is arranged in the middle of the waste liquid return pipe 200, a speed control damping device 6 for controlling the lifting and lowering speed of the lifting and lowering floating component 4 is arranged at the lower end of the separator 1, a transmission component 7 is arranged between the lifting and lowering floating component 4 and the flow control ball valve component 5, and the transmission component 7 can control the flow size of the flow control ball valve component 5 according to the lifting height of the lifting and lowering floating component 4;

[0030] The waste liquid medium and the steam medium are inputted into the heat exchanger body 201 from the heat exchange medium input assembly 2, the steam medium and the waste liquid medium are heated, and enter the spiral evaporation delivery channel 8 through the steam delivery pipe 300. The reaction time of the waste liquid can be increased through the spiral evaporation delivery channel 8, and the waste liquid will evaporate continuously during the flow of the spiral evaporation delivery channel 8. The U-shaped top cover 3 is provided to further block the incompletely evaporated waste liquid, and the semi-crystalline waste liquid attached to the lower surface of the U-shaped top cover 3 is guided into the spiral evaporation delivery channel 8 for flow evaporation, and the airflow forming steam enters the steam delivery pipe 300 through the gap between the spiral evaporation delivery channel 8 and the U-shaped top cover 3 and is delivered to the next heat exchanger body 201 as a heat exchange medium;

[0031] Since the spiral evaporation delivery channel 8 is provided, the height of the medium inside the separator 1 must be controlled, otherwise the purpose of increasing the stroke cannot be achieved by completely immersing the spiral evaporation delivery channel 8;

[0032] Therefore, the lifting and floating assembly 4 is used to sense the height of the waste liquid in the spiral evaporation conveying channel 8. The higher the waste liquid height is, the higher the waste liquid height is fed back to the flow control ball valve assembly 5 through the transmission assembly 7 to control the flow rate to be smaller, thereby reducing the reflux speed and the waste liquid input speed of the waste liquid input end 204;

[0033] When the waste liquid level is lower, the transmission component 7 is used to feed back to the flow control ball valve component 5 to control the flow rate to increase, thereby increasing the reflux speed and the waste liquid input speed of the waste liquid input end 204;

[0034] Provide the separator 1 with sufficient reaction time to ensure the evaporation effect;

[0035] Since the waste liquid is in a boiling state due to the high temperature inside the separator 1, the speed control damping device 6 is provided to ensure the stability of the lifting and floating assembly 4 on the surface of the waste liquid. The speed control damping device 6 controls the up and down shaking frequency of the lifting and floating assembly 4 to prevent the lifting and floating assembly 4 from fluctuating due to boiling and affecting the adjustment of the flow control ball valve assembly 5.

[0036] The heat exchange medium input component 2 of the present invention includes a heat exchanger body 201, an input pipe 202 is arranged between the heat exchanger body 201 and the separator 1, a steam input end 203 is arranged on one side of the heat exchanger body 201, and a waste liquid input end 204 is connected to the bottom of the waste liquid reflux pipe.

[0037] In the present invention, a steam delivery pipe 300 is provided between two adjacent separators 1 and the heat exchange medium input assembly 2;

[0038] The U-shaped top cover 3 is arranged along the path of the spiral evaporation conveying channel 8 .

[0039] The U-shaped top cover 3 of the present invention includes an upper arc-shaped cover 301, and both ends of the upper arc-shaped cover 301 are provided with guide cross plates 302 extending toward the inner side of the spiral evaporation conveying channel 8. The guide cross plates 302 are used to fix the waste liquid that is semi-crystallized to the upper arc-shaped cover 301 to flow back to the spiral evaporation conveying channel 8 below for re-evaporation.

[0040] A steam delivery side opening 303 is provided between the U-shaped top cover 3 and the spiral evaporation delivery channel 8 of the present invention.

[0041] The lifting and floating assembly 4 of the present invention includes a plurality of sealing guide shaft holes 401 arranged at the bottom of the separator 1, a sealing guide shaft 402 is movably arranged up and down in the sealing guide shaft hole 401, a floating structure 403 is arranged between the upper ends of the plurality of sealing guide shafts 402, and the density of the floating structure 403 is less than the density of the waste liquid; the flow control ball valve assembly 5, the transmission assembly 7, etc. are made of high temperature resistant plastic materials.

[0042] The floating structure 403 of the present invention is made of low-density polyethylene, ethylene-vinyl acetate copolymer, polystyrene foam material, polyester material or a floating plate stainless steel structure.

[0043] The flow control ball valve assembly 5 of the present invention comprises a ball valve housing 501 arranged on the waste liquid return pipe 200 , and a flow control ball valve 502 is rotatably arranged in the ball valve housing 501 .

[0044] The speed control damping device 6 of the present invention comprises a damping valve body 601 arranged at the bottom of the separator 1, a lifting annular plate 609 is connected between the lower ends of the plurality of sealing guide shafts 402, a baffle plate 602 is arranged in the middle of the damping valve body 601, the baffle plate 602 divides the interior of the damping valve body 601 into two upper and lower valve chambers 603, each of the two valve chambers 603 is provided with a piston plate 604, a vertical shaft hole 605 is arranged in the middle of the baffle plate 602, and the two piston plates 604 are arranged in the middle of the baffle plate 602. A vertical shaft body 606 is connected between the plug plates 604. The vertical shaft body 606 extends to the bottom of the damping valve body 601 and is fixedly connected to the lifting annular plate 609. A through hole 607 is provided on the blocking plate 602. When the two piston plates 604 move up and down synchronously, the medium in the two valve chambers 603 will be transferred from one to the other through the through hole 607, and the up and down movement speed of the piston plate 604 is controlled by the diameter of the through hole 607.

[0045] When the waste liquid inside the separator 1 decreases, the floating structure 403 will descend, and the descending process will drive the multiple sealing guide shafts 402 to descend. The descending of the sealing guide shafts 402 will cause the lifting annular plate 609 to descend, and the descending of the lifting annular plate 609 will drive the driving rack 703 to descend, thereby adjusting the rotation angle of the driving rack 703, so that the flow of the control ball valve 502 becomes larger;

[0046] When the lifting annular plate 609 descends, the two piston plates 604 will descend in the corresponding valve chambers 603, so that the medium in the upper valve chamber 603 is transferred to the lower valve chamber 603 through the through hole 607. Since the diameter of the through hole 607 is fixed, the transfer speed is limited. Therefore, the up and down swing amplitude of the lifting annular plate 609 will also be reduced, thereby improving the control accuracy of the control ball valve 502.

[0047] The transmission assembly 7 of the present invention includes a transmission shaft 701 arranged on one side of the control ball valve 502 and extending to the outside of the ball valve housing 501, a transmission gear 702 is arranged at the outer end of the transmission shaft 701, and a driving rack 703 is arranged on the lifting annular plate 609, and the driving rack 703 and the transmission gear 702 are meshed for transmission.

[0048] The present invention also provides a waste liquid treatment system, comprising the triple-effect evaporator for waste liquid treatment of any of the above embodiments. The specific description of the triple-effect evaporator for waste liquid treatment can be referred to the above embodiments, which will not be repeated here.

[0049] The present invention also provides a waste liquid treatment method, comprising the following steps: inputting the waste liquid into the triple-effect evaporator of any of the above embodiments for evaporation treatment. The specific description of the triple-effect evaporator used for waste liquid treatment can be referred to the above embodiments, which will not be repeated here.

[0050] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A triple-effect evaporator for waste liquid treatment, comprising a plurality of separators (1), one side of each separator (1) being connected to a heat exchange medium input assembly (2) for inputting steam and waste liquid, a waste liquid return pipe (200) being arranged between the bottom of each separator (1) and the bottom of each heat exchange medium input assembly (2), characterized in that: The inner wall of the separator (1) is provided with a spiral evaporation conveying channel (8), and a U-shaped top cover (3) for reflowing waste liquid is arranged above the spiral evaporation conveying channel (8). A lifting and floating assembly (4) for sensing the amount of waste liquid in the separator (1) is arranged in the middle of the separator (1), and a flow control ball valve assembly (5) is arranged in the middle of the waste liquid return pipe (200). A speed control damping device (6) for controlling the lifting and lowering speed of the lifting and floating assembly (4) is arranged at the lower end of the separator (1). A transmission assembly (7) is arranged between the lifting and floating assembly (4) and the flow control ball valve assembly (5), and the transmission assembly (7) can control the flow of the flow control ball valve assembly (5) according to the lifting height of the lifting and floating assembly (4).

2. A triple-effect evaporator for waste liquid treatment according to claim 1, characterized in that: The heat exchange medium input assembly (2) comprises a heat exchanger body (201), an input pipe (202) is arranged between the heat exchanger body (201) and the separator (1), a steam input end (203) is arranged on one side of the heat exchanger body (201), and a waste liquid input end (204) is connected to the bottom of the waste liquid return pipe (200).

3. A triple-effect evaporator for waste liquid treatment according to claim 2, characterized in that: A steam delivery pipe (300) is provided between two adjacent separators (1) and the heat exchange medium input assembly (2); The U-shaped top cover (3) is arranged along the path of the spiral evaporation conveying channel (8); The U-shaped top cover (3) comprises an upper arc-shaped cover (301), and guide transverse plates (302) extending toward the inner side of the spiral evaporation conveying channel (8) are arranged at both ends of the upper arc-shaped cover (301), and the guide transverse plates (302) are used to return the waste liquid semi-crystallized to the upper arc-shaped cover (301) to the spiral evaporation conveying channel (8) below for re-evaporation.

4. A triple-effect evaporator for waste liquid treatment according to claim 3, characterized in that: A steam delivery side opening (303) is provided between the U-shaped top cover (3) and the spiral evaporation delivery channel (8).

5. A triple-effect evaporator for waste liquid treatment according to claim 4, characterized in that: The lifting and floating assembly (4) comprises a plurality of sealing guide shaft holes (401) arranged at the bottom of the separator (1), a sealing guide shaft (402) being movably arranged up and down in the sealing guide shaft holes (401), a floating structure (403) being arranged between the upper ends of the plurality of sealing guide shafts (402), and a density of the floating structure (403) being less than the density of the waste liquid.

6. A triple-effect evaporator for waste liquid treatment according to claim 5, characterized in that: The floating structure (403) is made of low-density polyethylene, ethylene-vinyl acetate copolymer, polystyrene foam material, polyester material or a floating plate stainless steel structure.

7. A triple-effect evaporator for waste liquid treatment according to claim 6, characterized in that: The flow control ball valve assembly (5) comprises a ball valve housing (501) arranged on the waste liquid return pipe (200), and a flow control ball valve (502) is rotatably arranged in the ball valve housing (501).

8. The triple-effect evaporator for waste liquid treatment according to claim 7, characterized in that: The speed control damping device (6) comprises a damping valve body (601) arranged at the bottom of the separator (1), a lifting annular plate (609) is connected between the lower ends of the plurality of sealing guide shafts (402), a baffle plate (602) is arranged in the middle of the damping valve body (601), the baffle plate (602) divides the interior of the damping valve body (601) into two upper and lower valve chambers (603), each of the two valve chambers (603) is provided with a piston plate (604), a vertical shaft hole (605) is arranged in the middle of the baffle plate (602), and the two piston plates (604) are arranged in the middle of the baffle plate (602). A vertical axis (606) is connected between the plug plates (604), and the vertical axis (606) extends to the bottom of the damping valve body (601) and is fixedly connected to the lifting annular plate (609). A through hole (607) is provided on the blocking plate (602). When the two piston plates (604) move up and down synchronously, the medium in the two valve chambers (603) will be transferred from one to the other through the through hole (607), and the up and down movement speed of the piston plate (604) is controlled by the diameter of the through hole (607).

9. A waste liquid treatment system, characterized in that: It comprises the triple-effect evaporator described in any one of claims 1-8.

10. A method for treating waste liquid, characterized in that: The method comprises the following steps: inputting the waste liquid into the triple-effect evaporator described in any one of claims 1 to 8 for evaporation treatment.

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