Evaporator pretreatment equipment

Abstract

The utility model relates to evaporator pretreatment equipment which comprises a coagulative precipitation tank, a mechanical filter, an electrochemical oxidation reaction tank, an activated carbon adsorption tank, a double-alkali hardness removal tank, an aeration tank, a fluidized bed crystallization reactor and an ion exchange reaction tank, the coagulative precipitation tank and the mechanical filter remove most organic matters in the sewage in a coagulative precipitation and filtration manner by adding a coagulant and a coagulant aid, and the electrochemical oxidation reaction tank and the activated carbon adsorption tank are used for further removing residual organic matters in the sewage in an electrolysis and adsorption manner; the double-alkali hardness removal tank, the aeration tank and the fluidized bed crystallization reactor are used for removing the hardness in the sewage in an enhanced crystallization manner, and the ion exchange reaction tank is used for further removing the hardness in the sewage in a cation exchange manner. When the pretreated sewage enters the evaporator to be evaporated, scaling is not prone to occurring in the evaporator, and the evaporation speed is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of evaporators, in particular to an evaporator pretreatment device. BACKGROUND

[0002] In the landfill, the leachate concentrated water is usually treated by an evaporator, and the solid substances remaining after the concentrated water is evaporated are treated.

[0003] However, since the concentrated water contains a large amount of calcium and magnesium ions, sulfate ions, phosphate ions and silicon dioxide ions, the evaporator is prone to scaling when directly evaporating the concentrated water. It is found through detection that the main scaling substances are silicon dioxide, calcium sulfate and calcium phosphate, and the sewage also contains high concentration of COD, which seriously affects the treatment efficiency of the evaporator. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problems of low treatment efficiency and easy scaling of the evaporator when directly treating the leachate concentrated water by the evaporator, the present application provides an evaporator pretreatment device.

[0005] The evaporator pretreatment device provided by the present application adopts the following technical scheme:

[0006] An evaporator pretreatment device, comprising a coagulation sedimentation tank, a mechanical filter, an electrochemical oxidation reaction tank, an activated carbon adsorption tank, a double-alkali hardness removal tank, an aeration tank, a fluidized bed crystallization reactor and an ion exchange reaction tank, the coagulation sedimentation tank and the mechanical filter remove most of the organic matter in the sewage by coagulation and sedimentation and filtration by adding coagulant and coagulant aid, the electrochemical oxidation reaction tank and the activated carbon adsorption tank are used to further remove the remaining organic matter in the sewage by electrolysis and adsorption, the double-alkali hardness removal tank, the aeration tank and the fluidized bed crystallization reactor are used to remove the hardness in the sewage by strengthening crystallization, and the ion exchange reaction tank is used to further remove the hardness in the sewage by cation exchange.

[0007] Through the above technical scheme, the organic matter and sulfides with high COD concentration in the sewage are removed by the coagulation sedimentation tank, the mechanical filter, the electrochemical oxidation reaction tank and the activated carbon adsorption tank, and the silicon dioxide and calcium ions which cause the evaporator to be prone to scaling are removed by the double-alkali hardness removal tank, the aeration tank, the fluidized bed crystallization reactor and the ion exchange reaction tank, so that the pretreated sewage is not prone to scaling in the evaporator and the evaporation speed is faster when the pretreated sewage enters the evaporator for evaporation.

[0008] Optionally, the electrochemical reaction tank is uniformly provided with ultraviolet electrodes.

[0009] Optionally, the coagulation sedimentation tank comprises a sedimentation tank body, a turbidity meter arranged in the sedimentation tank body and configured to detect the turbidity of sewage in the sedimentation tank body, and a feeding device arranged on the sedimentation tank body, the feeding device comprising a mounting frame, a metering mechanism arranged on the mounting frame and configured to feed chemicals into a delivery mechanism according to the measurement result of the turbidity meter, and the delivery mechanism configured to feed the entire sedimentation tank body.

[0010] Optionally, the metering mechanism comprises a first storage barrel arranged on the mounting frame and configured to store coagulants, and a second storage barrel arranged on the mounting frame and configured to store coagulant aids, the bottom wall of each of the first and second storage barrels is provided with a discharge pipe, a baffle is slidably arranged on the discharge pipe and configured to close the discharge opening of the discharge pipe, a pressing spring is arranged on each of the discharge pipes and configured to push the baffle to close the discharge opening of the discharge pipe, the mounting frame is provided with a pushing cylinder configured to push the two baffles to slide, and each of the two baffles is provided with an adjusting assembly configured to adjust the distance by which the baffle is pushed by the pushing cylinder.

[0011] Optionally, the adjusting assembly comprises a sliding rail arranged on the baffle and parallel to the sliding direction of the baffle, a pushing block is slidably arranged on the sliding rail, and a motor lead screw is arranged on the sliding rail and configured to push the pushing block to slide, the pushing cylinder pushes the baffle to slide through the pushing block.

[0012] Optionally, the discharge pipe is designed as a square tube.

[0013] Optionally, the discharge opening of the discharge pipe is inclined.

[0014] Optionally, the discharge pipe on each side of the discharge opening is provided with a chute, and each side of the baffle is slidably arranged in the chute.

[0015] Optionally, the discharge pipe on the lower side of the discharge opening is provided with a sealing baffle, and the upper side of the baffle is further provided with a sealing plate, when the baffle closes the discharge opening of the discharge pipe, the lower side of the baffle abuts against the sealing baffle, and the sealing plate abuts against the side wall of the discharge pipe.

[0016] Optionally, the delivery mechanism comprises a dispensing barrel arranged on the mounting frame and a spray pipeline arranged on the sedimentation tank body, the spray pipeline is uniformly distributed in the sedimentation tank body, a plurality of spray heads are uniformly distributed on the spray pipeline, the dispensing barrel is configured to receive chemicals provided by the first and second storage barrels, a metering pump is arranged on the dispensing barrel and configured to supply water in the dispensing barrel, a pressure pump is further arranged on the dispensing barrel and configured to pump the chemical liquid in the dispensing barrel to the spray pipeline to be sprayed out, and a stirring pump is arranged in the dispensing barrel.

[0017] In summary, the present application has the organic matter and sulfide with high COD concentration in sewage removed by the coagulation sedimentation tank, mechanical filter, electrochemical oxidation reaction tank and activated carbon adsorption tank, the silica and calcium ions which are easy to scale in the evaporator are removed by the double-alkali hardness removal tank, aeration tank, fluidized bed crystallization reactor and ion exchange reaction tank, so that the sewage after pretreatment is easy to evaporate in the evaporator and the evaporation speed is fast. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the overall connection schematic diagram of the present application.

[0019] Figure 2 is the three-dimensional structure schematic diagram of the coagulation sedimentation tank of the present application.

[0020] Figure 3 is the three-dimensional structure schematic diagram of the second storage barrel of the present application.

[0021] Figure 4 is the three-dimensional structure schematic diagram of the first storage barrel of the present application, in which the discharge port of the discharge pipe is in an open state.

[0022] Figure 5 is the three-dimensional structure schematic diagram of the first storage barrel of the present application, in which the discharge port of the discharge pipe is in an open state. Figure 4

[0023] Figure 6 is the sectional view of the spraying pipeline of the present application.

[0024] Those skilled in the art will appreciate that the elements in the drawings are shown for simplicity and clarity and that the sizing of some of the elements and the positioning of some of the elements can be exaggerated or drawn with non-uniform scale to help improve understanding of the present embodiments.

[0025] Reference signs: 1, coagulation sedimentation tank; 11, sedimentation tank body; 12, turbidity meter; 2, mechanical filter; 3, electrochemical oxidation reaction tank; 4, activated carbon adsorption tank; 5, double-alkali hardness removal tank; 6, aeration tank; 7, fluidized bed crystallization reactor; 8, ion exchange reaction tank; 9, feeding device; 91, mounting frame; 92, throwing mechanism; 921, deployment barrel; 922, spraying pipeline; 923, spray head; 924, metering pump; 93, adjustable transmission; 10, metering mechanism; 101, first storage barrel; 102, second storage barrel; 103, discharge pipe; 1031, discharge port; 1032, chute; 1033, sealing baffle; 1034, sealing plate; 104, baffle; 105, abutting spring; 106, pushing cylinder; 107, adjusting assembly; 1071, sliding rail; 1072, pushing block. EMBODIMENT

[0026] The following will be described in detail​Figure 1 The present application is further described in detail.

[0027] With reference to Figure 1 The present application discloses a kind of evaporator pretreatment equipment, with reference to Figure 1 Including coagulation sedimentation tank 1, mechanical filter 2, electrochemical oxidation reaction pool 3, activated carbon adsorption pool 4, double-alkali hardness removal pool 5, aeration tank 6, fluidized bed crystallization reactor 7 and ion exchange reaction tank 8.

[0028] Coagulant and coagulant aid are put into coagulation sedimentation tank 1 to precipitate organic matter in leachate concentrated water, and the dosage is adjusted according to water quality, and the conventional coagulant dosage is 2000-4000 ppm, and the coagulant aid dosage is 30-60 ppm.

[0029] 50%~70% of the organic matter in the leachate concentrated water after precipitation is removed, and then the mechanical filter 2 is filtered to remove large particles in water and unprecipitated pollutants.

[0030] The leachate concentrated water after precipitation and filtration to remove most of the organic matter is pumped into the electrochemical oxidation reaction pool 3, and due to the high conductivity of the leachate concentrated water, the effect of oxidizing the remaining organic matter in the leachate concentrated water by electrochemical reaction is good, the remaining organic matter in the leachate concentrated water is quickly oxidized by the electrochemical reaction, and then the leachate concentrated water after the electrochemical reaction is pumped to the activated carbon adsorption pool 4 to adsorb the scale inhibitor in the activated carbon adsorption pool 4 and part of the leachate concentrated water, to further remove the organic matter in the leachate concentrated water.

[0031] At the same time, in order to further improve the reaction efficiency, ultraviolet electrodes are fixedly installed in the reaction pool, and the ultraviolet electrodes are uniformly distributed in the reaction pool.

[0032] The leachate concentrated water after activated carbon adsorption is pumped into the double-alkali hardness removal pool 5, and the pH of the leachate concentrated water is controlled at about 11.5 by adding sodium carbonate and lye in the double-alkali hardness removal pool 5, and after three to four hours of reaction, the reacted leachate concentrated water is pumped into the aeration tank 6 for 2-3 hours of aeration, and then the aerated leachate concentrated water is pumped into the fluidized bed crystallization reactor 7, which contains granular calcite or quartz stone. Under the condition that the leachate concentrated water is alkaline and fully aerated, the fluidized bed crystallization reactor 7 removes 50%~65% of the hardness of calcium and magnesium in the leachate concentrated water by strengthening crystallization, and part of the hardness-removed leachate concentrated water is pumped into the ion exchange reaction tank 8 for further removal of hardness in wastewater by cation exchange.

[0033] After the leachate concentrated water is treated by the above-mentioned mechanism, most of the COD and hardness in the leachate concentrated water can be removed, and then the treated leachate concentrated water is pumped to the evaporator for evaporation treatment, so that the evaporator is not easy to appear scaling and blockage phenomenon during the evaporation treatment of the leachate concentrated water.

[0034] Referring to Figure 2 The coagulation sedimentation tank 1 comprises a sedimentation tank body 11, a turbidity meter 12 fixedly installed in the sedimentation tank body 11, and a feeding device 9 for adding coagulant and coagulant aid into the sedimentation tank body 11.

[0035] Referring to Figure 2 The feeding device 9 comprises a mounting frame 91 fixedly installed on the sedimentation tank body 11, a metering mechanism 10 located on the mounting frame 91, and a feeding mechanism 92.

[0036] Referring to Figure 2 The turbidity meter 12 is used to detect the turbidity of the solution in the sedimentation tank body 11, the metering mechanism 10 is used to feed an appropriate amount of medicine into the feeding end of the feeding mechanism 92 according to the detection result of the turbidity meter 12, and the feeding mechanism 92 is used to feed coagulant and coagulant aid into the sedimentation tank body 11.

[0037] Referring to Figure 2 and Figure 4 The metering mechanism 10 comprises a first storage barrel 101 and a second storage barrel 102 fixedly installed on the mounting frame 91, the first storage barrel 101 is used to store solid coagulant, and the second storage barrel 102 is used to store solid coagulant aid. The bottom wall of the first storage barrel 101 and the second storage barrel 102 is funnel-shaped, a vertical discharge pipe 103 is fixedly installed on the bottom wall of the first storage barrel 101 and the second storage barrel 102, the discharge pipe 103 is square tube-shaped, and the lower end of the discharge pipe 103 is provided with a discharge port 1031 for outputting the material in the first storage barrel 101 or the second storage barrel 102.

[0038] Referring to Figure 4 and Figure 5 A baffle 104 is arranged at the discharge port 1031 of the discharge pipe 103, the discharge port 1031 is arranged obliquely, a sliding groove 1032 is formed on the discharge pipe 103 on both sides of the oblique direction of the discharge port 1031, the baffle 104 is slidingly installed on the sliding grooves 1032 on both sides, a sealing baffle strip is fixedly installed on the discharge pipe 103 at the lower end of the discharge port 1031, a sealing plate 1034 is integrally arranged on the upper side of the baffle 104, when the baffle 104 closes the discharge port 1031, one end of the baffle 104 abuts and tightly seals the sealing baffle strip, and the sealing plate 1034 abuts and tightly seals the side wall of the discharge pipe 103.

[0039] Referring to Figure 2 and Figure 4The push cylinder 106 is fixedly installed on the mounting frame 91 and used to push the two baffles 104 to slide. An adjusting assembly 107 is arranged on the baffle 104 and used to adjust the sliding distance of the baffle 104 pushed by the push cylinder 106. The adjusting assembly 107 comprises a sliding rail 1071 fixedly installed on the baffle 104 and parallel to the sliding direction of the baffle 104. A push block 1072 is slidably installed on the sliding rail 1071 by a motor lead screw drive. The push cylinder 106 pushes the baffle 104 to slide reversely to open the discharge port 1031 through the push block 1072. Meanwhile, the position of the push block 1072 is adjusted by the motor lead screw, so that the partial stroke of the piston rod of the push cylinder 106 is covered by the sliding of the push block 1072, and the pushing distance of the push cylinder 106 to the baffle 104 is adjusted.

[0040] With reference to Figure 2 , Figure 3 and Figure 4 , the motor adjusting the position of the push block 1072 starts to adjust the position of the push block 1072 according to the detection result of the turbidity measuring instrument 12, so as to adjust the opening amplitude of the baffle 104 and the amount of coagulant and coagulant aid falling from the discharge pipe 103 per unit time, so as to adapt to the percolate concentrated water with different turbidity. Meanwhile, the motor lead screws between the baffles 104 on the second storage barrel 102 are connected through an adjustable speed reducer, so that the same number of rotations of the motor drives the sliding lengths of the two push blocks 1072 to be different, and the opening degrees of the two baffles 104 are different, so as to adapt to the ratio between different kinds of coagulant and coagulant aid.

[0041] With reference to Figure 2 and Figure 6 , the feeding mechanism 92 comprises a dispensing barrel 921 fixedly installed on the mounting frame 91 and a spraying pipeline 922 fixedly installed on the upper side of the sedimentation tank body 11. The spraying pipeline 922 is uniformly distributed in the sedimentation tank body 11, and a plurality of nozzles 923 are uniformly fixedly installed on the lower side of the spraying pipeline 922 and spray toward the sedimentation tank body 11.

[0042] With reference to Figure 2 and Figure 4 , the dispensing barrel 921 is located below the first storage barrel 101 and the second storage barrel 102. The upper opening of the dispensing barrel 921 is opposite to the discharge ports 1031 of the two discharge pipes 103, and the dispensing barrel 921 is connected with the spraying pipeline 922. A stirring pump, a metering pump 924 and a pressure pump are fixedly installed in the dispensing barrel 921. The metering pump 924 is used to inject an appropriate amount of water into the dispensing barrel 921 according to the detection result of the turbidity measuring instrument 12. The stirring pump is used to stir the dispensing liquid. The pressure pump is used to deliver the dispensing liquid in the dispensing barrel 921 to the spraying pipeline 922 and spray out through the nozzles 923.

[0043] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. An evaporator pre-treatment apparatus characterized by: The application relates to a sewage treatment device, which comprises a coagulation sedimentation tank (1), a mechanical filter (2), an electrochemical oxidation reaction tank (3), an activated carbon adsorption tank (4), a double-alkali hardness removal tank (5), an aeration tank (6), a fluidized bed crystallization reactor (7) and an ion exchange reaction tank (8), wherein the coagulation sedimentation tank (1) and the mechanical filter (2) remove most of the organic matters in sewage by coagulation and sedimentation and filtration through the addition of coagulants and coagulant aids, the electrochemical oxidation reaction tank (3) and the activated carbon adsorption tank (4) further remove the residual organic matters in sewage by electrolysis and adsorption, the double-alkali hardness removal tank (5), the aeration tank (6) and the fluidized bed crystallization reactor (7) remove the hardness in sewage by strengthened crystallization, and the ion exchange reaction tank (8) further removes the hardness in sewage by cation exchange.

2. A pre-evaporator treatment apparatus according to claim 1, characterized in that: Ultraviolet electrodes are uniformly arranged in the electrochemical oxidation reaction tank (3).

3. A pre-evaporator treatment apparatus according to claim 1, wherein: The coagulation sedimentation tank (1) comprises a sedimentation tank body (11), a turbidity measuring instrument (12) arranged in the sedimentation tank body (11) and a feeding device (9) arranged on the sedimentation tank body (11), the turbidity measuring instrument (12) is used for detecting the turbidity of sewage in the sedimentation tank body (11), and the feeding device (9) comprises a mounting frame (91), a metering mechanism (10) arranged on the mounting frame (91) and a feeding mechanism (92), the metering mechanism (10) is used for feeding medicines into the feeding mechanism (92) according to the measurement result of the turbidity measuring instrument (12), and the feeding mechanism (92) is used for feeding the whole sedimentation tank body (11).

4. A pre-evaporator treatment apparatus according to claim 3, wherein: The metering mechanism (10) comprises a first storage barrel (101) for storing coagulants and a second storage barrel (102) for storing coagulant aids, discharge pipes (103) are arranged on the bottom walls of the first storage barrel (101) and the second storage barrel (102), baffles (104) are slidably arranged on the discharge pipes (103), the baffles (104) are used for closing discharge ports (1031) of the discharge pipes (103), abutting springs (105) are arranged on the two discharge pipes (103), the abutting springs (105) are used for pushing the baffles (104) to close the discharge ports (1031) of the discharge pipes (103), the mounting frame (91) is provided with a pushing cylinder (106) for pushing the two baffles (104) to slide, and adjusting assemblies (107) are arranged on the two baffles (104), the adjusting assemblies (107) are used for adjusting the distances at which the baffles (104) are pushed by the pushing cylinder (106).

5. A pre-evaporator treatment apparatus according to claim 4, wherein: The adjusting assembly (107) comprises a sliding rail (1071) arranged on the baffle (104), the sliding rail (1071) is parallel to the sliding direction of the baffle (104), a push block (1072) is slidingly arranged on the sliding rail (1071), and a motor lead screw is arranged on the sliding rail (1071) and used for pushing the push block (1072) to slide, and the push cylinder (106) pushes the baffle (104) to slide through the push block (1072).

6. A pre-evaporator treatment apparatus according to claim 4, wherein: The discharge pipe (103) is designed as a square pipe.

7. A pre-evaporator treatment apparatus according to claim 4, wherein: The discharge port (1031) of the discharge pipe (103) is inclined.

8. A pre-evaporator treatment apparatus according to claim 4, wherein: The discharge pipe (103) on both sides of the discharge port (1031) is provided with a chute (1032), and the baffle (104) is slidingly arranged in the two chutes (1032) respectively.

9. A pre-evaporator treatment apparatus according to claim 8, wherein: The discharge pipe (103) on the lower side of the discharge port (1031) is provided with a sealing baffle (1033), and the upper side of the baffle (104) is further provided with a sealing plate (1034), when the baffle (104) closes the discharge port (1031) of the discharge pipe (103), the lower side of the baffle (104) abuts against the sealing baffle (1033), and the sealing plate (1034) abuts against the side wall of the discharge pipe (103).

10. A pre-evaporator treatment apparatus according to claim 4, wherein: The feeding mechanism (92) comprises a dispensing barrel (921) arranged on the mounting frame (91) and a spraying pipeline (922) arranged on the sedimentation tank body (11), the spraying pipeline (922) is uniformly distributed in the sedimentation tank body (11), a plurality of spray heads (923) are uniformly distributed on the spraying pipeline (922), the dispensing barrel (921) is used for receiving medicines provided by the first storage barrel (101) and the second storage barrel (102), a metering pump (924) is arranged on the dispensing barrel (921) and used for supplying water in the dispensing barrel (921), a pressure pump is further arranged on the dispensing barrel (921) and used for pumping liquid medicine in the dispensing barrel (921) to the spraying pipeline (922) to be sprayed out, and a stirring pump is arranged in the dispensing barrel (921).

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