A three-effect composite water purifier with coagulation reaction, inclined plate sedimentation and sludge concentration

Abstract

The present invention relates to the technical field of sewage and wastewater treatment, and in particular to a three-effect composite water purifier comprising a coagulation reaction, an inclined plate sedimentation, and a sludge concentration. The region is divided from top to bottom into an inclined plate sedimentation zone, a coagulation reaction zone, and a sludge concentration zone. The inclined plate sedimentation zone and the coagulation reaction zone are connected via a one-way valve. The coagulation reaction zone and the sludge concentration zone are connected. A water inlet pipe is provided on one side of the coagulation reaction zone, a water outlet is provided on the upper portion of one side of the inclined plate sedimentation zone, and a sludge discharge port is provided at the lower end of the sludge concentration zone. The present invention organically couples the three functions of reaction, sedimentation, and concentration, not only achieving high integration of the equipment and reducing land area, but also realizing coordinated adjustment of the three functions, enabling reverse operation and "error correction," improving effluent quality, reducing chemical dosage, and increasing sludge concentration.

Description

Technical Field

[0001] The invention relates to the technical field of sewage and wastewater treatment, in particular to a three-effect composite water purifier comprising coagulation reaction, inclined plate sedimentation and sludge concentration. Background Art

[0002] For the treatment of wastewater containing light and fine suspended solids, coagulation reaction and (inclined plate) sedimentation are usually used for treatment. The precipitated sludge needs to be concentrated. In traditional water treatment technology, the removal of suspended solids usually includes three unit operations: coagulation reaction, sedimentation separation, and sediment (sludge) concentration. The three unit operations are carried out in sequence and have no reverse correlation. Coagulation reaction is a simple mixing of sewage and chemicals. If the amount of chemicals added during the process is insufficient, the subsequent sedimentation and separation effect cannot be effectively adjusted; excessive dosage of chemicals will lead to waste of chemicals and increase of sediment (sludge). In addition, each unit operates independently and cannot be adjusted in a coordinated manner. Summary of the Invention

[0003] In order to overcome the shortcomings of the existing technology, the present invention provides a three-effect composite water purifier comprising coagulation reaction, inclined plate sedimentation and sludge concentration, which organically couples the three functions of reaction, sedimentation and concentration, thereby achieving not only a high degree of integration of the equipment and reducing the land area, but also coordinated adjustment of the three functions, enabling reverse operation and "error correction", improving effluent quality, reducing the amount of chemicals used and increasing sludge concentration.

[0004] The technical solution is:

[0005] A three-effect composite water purifier of coagulation reaction, inclined plate sedimentation and sludge concentration includes a shell, a bracket, a fixing rod and a partition. A plurality of brackets are fixedly connected to the lower side of the shell, and a fixing rod is provided between the brackets. A plurality of partitions are provided in the shell to divide the shell into a plurality of areas. The areas are divided into an inclined plate sedimentation area, a coagulation reaction area and a sludge concentration area from top to bottom. The inclined plate sedimentation area is connected to the coagulation reaction area through a one-way valve, and the coagulation reaction area is connected to the sludge concentration area. A water inlet pipe is provided on one side of the coagulation reaction area, a water outlet is provided on the upper part of one side of the inclined plate sedimentation area, and a sludge discharge port is provided at the lower end of the sludge concentration area.

[0006] Preferably, the inclined plate sedimentation area includes an overflow trough and an inclined plate sedimentation layer, the inclined plate sedimentation layer is located at the bottom of the inclined plate sedimentation area, and the overflow trough is located in the shell and on the upper side of the inclined plate sedimentation layer.

[0007] Preferably, a motor is provided at the upper end of the shell, and a power output shaft of the motor passes through the inclined plate sedimentation zone and is located in the condensation reaction zone.

[0008] Preferably, the condensation reaction zone includes an inner mud bucket, a built-in axial flow agitator and a central flow diversion reactor. The inner mud bucket is installed in the condensation reaction zone, and the built-in axial flow agitator is installed in the inner mud bucket. The built-in axial flow agitator is connected to the power output shaft of the motor. The lower end of the inner mud bucket is provided with a central flow diversion reactor, and the central flow diversion reactor is connected to the sludge concentration zone.

[0009] Preferably, the sludge concentration zone includes a reflector and an external mud hopper, the lower end of the central flow diversion reactor is provided with a reflector, the lower end of the shell is provided with an external mud hopper, and the lower end of the external mud hopper is provided with a mud discharge port.

[0010] Preferably, the central flow guide reactor and the reflector plate are an integrated structure.

[0011] Preferably, the central flow-guiding reactor is filled with static disturbers from top to bottom to form a dense and sparse water flow channel.

[0012] The beneficial effects of the present invention are:

[0013] (1) The present invention organically couples the three functions of reaction, precipitation, and concentration, which not only achieves high integration of equipment and reduces land area, but also realizes the coordinated adjustment of the three functions, which can realize reverse operation and "error correction", improve effluent quality, reduce the amount of chemicals used, and increase sludge concentration;

[0014] (2) The present invention adopts a two-stage mud hopper with upper and lower layers arranged inside and outside. The inner mud hopper is located at the upper layer and can perform secondary sedimentation on light sludge. The axial flow agitator installed therein can reflux low-concentration sludge to form a circular reaction. The refluxed sludge has reactive activity due to the residual reagents and can form a reaction nucleus to promote a rapid coagulation reaction. The outer mud hopper is located at the bottom and can directly receive and concentrate heavy sludge to obtain high-concentration sludge and reduce the sludge moisture content.

[0015] (3) The present invention has a built-in static central flow diversion reactor, and a static disturber (stainless steel folded plate) is filled from top to bottom in the central laminar flow reactor to form a dense and sparse water flow channel; the mixed sewage is driven by the axial flow agitator on the upper part of the reactor, and the flow rate decreases from fast to slow, and the turbulence decreases from strong to weak, thereby achieving the gradual growth and coagulation of flocs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0017] Figure 1It is a structural schematic diagram of the present invention.

[0018] Explanation of the reference numerals: 1-motor, 2-overflow trough, 3-inclined plate sedimentation layer, 4-inner mud hopper, 5-built-in axial flow agitator, 6-water inlet pipe, 7-central diversion reactor, 8-reflection plate, 9-outer mud hopper, 10-mud discharge port, 11-water outlet, 12-shell, 13-bracket, 14-fixing rod, 15-partition. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 are within the scope of protection of the present invention.

[0020] Example 1

[0021] The device of the present invention is an integrated combination of coagulation reaction, inclined plate sedimentation and sludge concentration. The upper part is the inclined plate sedimentation area, which clarifies the overflow and water; the inner mud hopper 4 of the sedimentation area is equipped with a built-in axial flow agitator 5 and is directly connected to the coagulation reaction area in the middle; the lower part is the outer mud hopper 9, which has the effect of concentrating the sludge. The device structure is as follows Figure 1 gesture.

[0022] Sewage is quickly mixed with the added chemicals from the water inlet pipe 6 and enters the central diversion reactor 7; the motor 1 drives the built-in axial flow agitator 5 to push the low-concentration sludge in the inner mud hopper 4 downward to the central diversion reactor 7 for secondary mixing with the sewage. The central diversion reactor 7 is equipped with a dense and sparse static mixing disturbance from top to bottom; the sewage is deflected upward by the reflector 8 at the outlet of the central diversion reactor 7. Large particle agglomerates are separated from the water and settle downward into the outer mud hopper 9, and the concentrated high-concentration sludge is discharged through the mud outlet 10. Small and light flocs flow upward for further coagulation, and are separated and precipitated into the inner mud hopper 4 through the inclined plate sedimentation layer 3, forming a low-concentration sludge circulation backflow to participate in the coagulation reaction. The clean water that passes through the inclined plate sedimentation layer 3 is collected through the overflow trough 2 and discharged from the outlet 11.

[0023] The principle of the device is:

[0024] 1) The low-concentration sludge returned from the inner mud hopper 4 provides a reaction nucleus for the reaction between the original sewage and the reagent, thereby accelerating the coagulation; at the same time, the activity of the residual reagent in the returned sludge is fully utilized to save the amount of newly added chemical reagents.

[0025] 2) A static disturbance body (stainless steel folded plate) is set in the central flow reactor 7 to form a water flow from dense to sparse. When the mixed sewage passes through it, the flow rate gradually decreases and the turbulence gradually decreases, thereby achieving the gradual growth and coagulation of flocs.

[0026] 3) The reflector 8 is the first deflection and redirection for sewage lifting. Large particles and heavy flocs quickly settle downward to the outer mud hopper 9 under the action of gravity and centrifugal force.

[0027] 4) The small particles of light flocs that are not fully condensed move upward outside the central flow diversion reactor 7. Due to the extension of the reaction and sedimentation time, the light flocs further undergo secondary condensation during the movement.

[0028] 5) Inclined plate sedimentation layer 3 is installed in the opposite direction of the water flow, and together with internal mud hopper 4, it provides a secondary deflection for the sewage. Simultaneously, the built-in axial flow agitator 5 provides a downward flow field. The secondary coagulated flocs form a secondary sediment and enter the internal mud hopper 4, participating in the circulation reaction.

[0029] This device organically couples three units together. The coagulation reaction occurs in the device's internal middle layer, where wastewater, added reagents, and returned sludge from sedimentation mix. This not only recovers low-concentration, fine particles of sludge that are difficult to settle, improving sedimentation efficiency, but also utilizes residual reagent activity in the low-concentration sludge. Furthermore, the returned sludge serves as a growth nucleus for the coagulation reaction, enhancing the coagulation reaction. Large particles of sludge from the coagulation reaction enter the lower outer sludge hopper 9, forming a high-depth sludge, achieving a concentrated effect. Low-concentration sludge and wastewater move upward, settling in the upper inclined plate sedimentation layer 3 to achieve clarification, sharing, and enhanced effluent quality. The low-concentration sludge further settles in the inner sludge hopper. An internal axial flow agitator 5 is installed below the inner sludge hopper 4 to mix the returned low-concentration sludge with the raw sewage, achieving a circulating operation.

[0030] This device organically couples the three functions of reaction, precipitation and concentration, which not only achieves a high degree of equipment integration and reduces land area; it also realizes the coordinated adjustment of the three functions, can realize reverse operation and "error correction", improve effluent water quality, reduce the amount of chemicals used and increase sludge concentration.

[0031] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0032] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A three-effect composite water purifier with coagulation reaction, inclined plate sedimentation and sludge concentration, comprising a shell, a bracket, a fixing rod and a partition. The lower side of the shell is fixedly connected to multiple brackets, and fixing rods are provided between the brackets. The shell is provided with multiple partitions to divide the shell into multiple areas, characterized in that: The area is divided into an inclined plate sedimentation area, a coagulation reaction area and a sludge concentration area from top to bottom. The inclined plate sedimentation area and the coagulation reaction area are connected by a one-way valve, and the coagulation reaction area and the sludge concentration area are connected. A water inlet pipe is provided on one side of the coagulation reaction area, a water outlet is provided on the upper part of one side of the inclined plate sedimentation area, and a sludge discharge port is provided at the lower end of the sludge concentration area; The inclined plate sedimentation area includes an overflow trough and an inclined plate sedimentation layer, the inclined plate sedimentation layer is located at the bottom of the inclined plate sedimentation area, and the overflow trough is located in the shell and is located on the upper side of the inclined plate sedimentation layer; A motor is provided at the upper end of the housing, and a power output shaft of the motor is provided through the inclined plate sedimentation zone and is located in the condensation reaction zone; The coagulation reaction zone includes an inner mud bucket, a built-in axial flow agitator and a central diversion reactor. The inner mud bucket is installed in the coagulation reaction zone. The built-in axial flow agitator is installed in the inner mud bucket. The built-in axial flow agitator is connected to the motor power output shaft. The lower end of the inner mud bucket is provided with a central diversion reactor, and the central diversion reactor is connected to the sludge concentration zone. The central flow-guiding reactor is filled with static disturbance bodies from top to bottom to form a dense and sparse water flow channel.

2. A three-effect composite water purifier comprising coagulation reaction, inclined plate sedimentation and sludge concentration as claimed in claim 1, characterized in that: The sludge concentration area includes a reflector and an outer mud hopper. The lower end of the central diversion reactor is provided with a reflector, the lower end of the shell is provided with an outer mud hopper, and the lower end of the outer mud hopper is provided with a mud discharge port.

3. A three-effect composite water purifier comprising coagulation reaction, inclined plate sedimentation and sludge concentration as claimed in claim 2, characterized in that: The central flow guide reactor and the reflector plate are an integrated structure.

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