Desulfurization wastewater evaporation and concentration device

Abstract

The invention belongs to the technical field of environmental protection, and discloses a desulfurization wastewater evaporation and concentration device which is technically characterized by comprising an evaporation box, bearing discs are rotationally mounted on the two opposite inner side walls of the evaporation box respectively, and a plurality of sets of electric heating plates distributed in parallel are fixedly mounted between the two sets of bearing discs; a positioning assembly matched with the bearing discs is arranged between the two opposite side walls of the evaporation box, an impurity removing mechanism matched with the electric heating plate is arranged between the two bearing discs, the impurity removing mechanism comprises multiple sets of brushes, a limiting assembly and a rotating assembly, and the multiple sets of brushes are located on the two sides of the electric heating plate correspondingly; the problems that salt crystals are generated in the evaporation process of waste water at present and attached to the surface of the electric hot plate, and the heat transfer efficiency of the electric hot plate and the evaporation efficiency of the waste water are affected along with continuous increase of the thickness of the salt crystals are solved.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection, in particular to a desulfurization wastewater evaporation and concentration device. Background Art

[0002] For the desulfurization wastewater generated after the treatment of coal-fired flue gas in thermal power plants, the traditional treatment method ("three-tank" process) is mainly based on chemical treatment, which is mainly divided into neutralization, sedimentation, flocculation, concentration and clarification processes. After this simple chemical treatment of adding drugs, coagulation and precipitation, the desulfurization wastewater still has the characteristics of high salt content and high corrosiveness. Whether it is directly discharged or incorporated into the municipal sewage plant, it will have an adverse impact on the environment. For this reason, it is necessary to concentrate the desulfurization wastewater, and then perform pressure filtration or evaporation on the basis of concentration to achieve zero discharge of desulfurization wastewater.

[0003] At present, when desulfurization wastewater is subjected to high-temperature evaporation treatment, the wastewater solution is generally heated by an electric heating plate. However, the existing equipment is unable to protect the electric heating plate. During the evaporation process of the wastewater, salt crystals will be produced and attached to the surface of the electric heating plate. As the thickness of the salt crystals continues to increase, the heat transfer efficiency of the electric heating plate will be affected, and the wastewater cannot be fully heated, affecting its evaporation efficiency. Summary of the invention

[0004] The object of the present invention is to provide a desulfurization wastewater evaporation and concentration device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A desulfurization wastewater evaporation and concentration device comprises an evaporation box, the longitudinal cross-section of the evaporation box is a circular structure, the top of the evaporation box is provided with an air outlet, the bottom of the evaporation box is provided with a guide pipe, the side wall of the evaporation box is provided with a water injection pipe, the two opposite inner side walls of the evaporation box are respectively rotatably mounted with a carrier plate, a plurality of groups of parallel distributed electric heating plates are fixedly mounted between the two groups of carrier plates, a positioning assembly that cooperates with the carrier plate is provided between the two opposite side walls of the evaporation box, and the positioning assembly is used to control the rotation of the carrier plate in the evaporation box and thus control the electric heating plate to be synchronously moved in the inner cavity of the evaporation box Rotation, a cleaning mechanism that cooperates with the electric heating plate is arranged between the two groups of the carrying plates, the cleaning mechanism includes a brush, a limiting assembly and a rotating assembly, the brush is provided with multiple groups and is respectively located on both sides of the electric heating plate, the limiting assembly is located on the surface of the carrying plate and is connected to the brush, when the electric heating plate rotates in the inner cavity of the evaporator box, the limiting assembly controls the brush to translate and slide along the surface of the electric heating plate, the rotating assembly is connected to the limiting assembly, when the brush translates and slides along the surface of the electric heating plate, the rotating assembly controls the brush to rotate on the surface of the electric heating plate by cooperating with the limiting assembly.

[0006] As a further solution of the present invention: the positioning assembly includes a gear ring arranged on the annular side wall of the supporting plate, and a transmission column is installed on the two opposite side walls of the evaporator box for rotation together, and a transmission gear plate is fixedly installed on the surface of the transmission column, and the transmission gear plate is meshingly connected with the gear ring, and one end of the transmission column extends to the outside of the evaporator box and is connected to a motor.

[0007] As a further solution of the present invention: the limiting assembly includes vertical grooves opened on the surface of the carrying plate and located on both sides of the electric heating plate, sliding blocks are slidably installed in the vertical grooves, two groups of sliding blocks relatively distributed on the surface of the two carrying plates are rotated together with a carrying rod located on the outside of the electric heating plate, and multiple groups of brushes are evenly distributed on the surface of the carrying rod.

[0008] As a further solution of the present invention: the rotating assembly includes a control gear disk fixedly installed on the surface of the bearing rod, a side plate located outside the vertical groove is fixedly installed on the side wall of the bearing disk, and a rack meshingly connected to the control gear disk is fixedly installed on the surface of the side plate.

[0009] As a further solution of the present invention: the sliding block is made of magnetic material, and magnetic blocks cooperating with the sliding block are fixedly mounted on both ends of the vertical slot.

[0010] As a further solution of the present invention: the heights of the plurality of groups of electric heating plates are gradually shortened from the middle to both sides.

[0011] As a further solution of the present invention: support legs are fixedly installed around the bottom wall of the evaporator.

[0012] Compared with the prior art, the beneficial effects of the present invention are: by setting the positioning component to cooperate with the carrier plate, the position and angle of the electric heating plate can be conveniently adjusted, and by setting the limit component to cooperate with the rotating component, the brush can be controlled to automatically rotate on the surface of the electric heating plate, and then the brush can be controlled to automatically clean the salt crystals attached to the surface of the electric heating plate, effectively improving the use effect of the electric heating plate. The problem that salt crystals will be attached to the surface of the electric heating plate during the evaporation process of wastewater is solved. As the thickness of the salt crystals continues to increase, it will affect the heat transfer efficiency of the electric heating plate and the evaporation efficiency of the wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of a desulfurization wastewater evaporation and concentration device provided in an embodiment of the present invention.

[0014] Figure 2 This is a schematic diagram of the main structure of a desulfurization wastewater evaporation and concentration device provided in an embodiment of the present invention.

[0015] Figure 3 The present invention is a schematic structural diagram of a positioning component in a desulfurization wastewater evaporation and concentration device provided in an embodiment of the present invention.

[0016] Figure 4 The present invention provides a schematic diagram of a supporting plate and its connection structure in a desulfurization wastewater evaporation and concentration device in an embodiment of the present invention.

[0017] Figure 5 for Figure 2 Schematic diagram of the enlarged structure of A.

[0018] Figure 6 for Figure 4 Schematic diagram of the enlarged structure of B.

[0019] Among them: 1-evaporator box, 11-air outlet, 12-exhaust pipe, 13-water injection pipe, 2-carrying plate, 3-electric heating plate, 4-positioning component, 41-gear ring, 42-transmission column, 43-transmission gear disc, 44-motor, 5-impurity removal mechanism, 51-brush, 52-limiting component, 521-vertical groove, 522-sliding block, 523-carrying rod, 53-rotating component, 531-control gear disc, 532-side plate, 533-rack, 6-magnetic block, 7-support leg. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0021] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, it is a structural diagram of a desulfurization wastewater evaporation and concentration device provided by an embodiment of the present invention, including an evaporation box 1, the longitudinal cross-section of the evaporation box 1 is a circular structure, the top of the evaporation box 1 is provided with an air outlet 11, the bottom of the evaporation box 1 is provided with a guide pipe 12, the side wall of the evaporation box 1 is provided with a water injection pipe 13, the two opposite inner side walls of the evaporation box 1 are respectively rotatably mounted with a carrier plate 2, a plurality of groups of parallel distributed electric heating plates 3 are fixedly installed between the two groups of carrier plates 2, and a positioning component 4 that cooperates with the carrier plate 2 is provided between the two opposite side walls of the evaporation box 1, and the positioning component 4 is used to control the rotation of the carrier plate 2 in the evaporation box 1 and thus control the electric heating plate 3 in the inner cavity of the evaporation box 1 Synchronous rotation, a cleaning mechanism 5 that cooperates with the electric heating plate 3 is arranged between the two groups of the carrying plates 2, the cleaning mechanism 5 includes a brush 51, a limit assembly 52 and a rotating assembly 53, the brush 51 is provided with multiple groups and is respectively located on both sides of the electric heating plate 3, the limit assembly 52 is located on the surface of the carrying plate 2 and is connected to the brush 51, when the electric heating plate 3 rotates in the inner cavity of the evaporator box 1, the limit assembly 52 controls the brush 51 to translate and slide along the surface of the electric heating plate 3, the rotating assembly 53 is connected to the limit assembly 52, when the brush 51 translates and slides along the surface of the electric heating plate 3, the rotating assembly 53 controls the brush 51 to rotate on the surface of the electric heating plate 3 by cooperating with the limit assembly 52.

[0023] When in use, the wastewater to be evaporated and concentrated is transported to the evaporation box 1 through the water injection pipe 13. Initially, the positioning component 4 controls the electric heating plate 3 to maintain a vertical state in the inner cavity of the evaporation box 1 by cooperating with the supporting plate 2. At this time, the limit component 52 controls the brush 51 to be at the bottom position of the electric heating plate 3, and the electric heating plate 3 is energized. The electric heating plate 3 performs high-temperature evaporation treatment on the wastewater in the evaporation box 1. During distillation, the wastewater is prone to salt crystals attached to the surface of the electric heating plate 3. When the salt crystals on the surface of the electric heating plate 3 need to be cleaned, the positioning component 4 controls the supporting plate 2 to rotate 180 degrees at the inner wall of the evaporation box 1, and the supporting plate 2 drives the electric heating plate 3 to rotate 180 degrees synchronously. When the electric heating plate 3 rotates, it drives the brush 51 to rotate synchronously. After the electric heating plate 3 rotates more than ninety degrees, the limit component 52 controls the brush 51 to slide along the electric heating plate 3. The rotating component 53 controls the brush 51 to rotate while sliding along the surface of the electric heating plate 3 by cooperating with the limit component 52. The brush 51 can automatically clean the salt crystals attached to the surface of the electric heating plate 3. After the limit component 52 controls the brush 51 to move to the bottom of the electric heating plate 3 again, when the electric heating plate 3 needs to be cleaned, the positioning component 4 controls the carrier plate 2 to rotate one hundred and eighty degrees again. This cycle is repeated, and the salt crystals attached to the surface of the electric heating plate 3 can be automatically cleaned multiple times.

[0024] like Figure 2 , Figure 3 , Figure 4As shown, as a preferred embodiment of the present invention, the positioning assembly 4 includes a gear ring 41 arranged on the annular side wall of the supporting plate 2, and a transmission column 42 is installed on the two opposite side walls of the evaporator box 1 for rotation, and a transmission gear plate 43 is fixedly installed on the surface of the transmission column 42, and the transmission gear plate 43 is meshed with the gear ring 41, and one end of the transmission column 42 extends to the outside of the evaporator box 1 and is connected to a motor 44.

[0025] When it is necessary to clean the salt crystals on the surface of the electric heating plate 3, the motor 44 drives the transmission column 42 to rotate, and the transmission column 42 drives the transmission gear plate 43 to rotate synchronously. The transmission gear plate 43 engages with the gear ring 41 for transmission, which can drive the carrier plate 2 to rotate at the inner wall of the evaporator box 1. The two groups of carrier plates 2 cooperate with each other to drive the electric heating plate 3 to rotate synchronously in the inner cavity of the evaporator box 1. After the electric heating plate 3 rotates one hundred and eighty degrees, the motor 44 controls the transmission gear plate 43 to stop rotating, and the transmission gear plate 43 and the gear ring 41 are engaged with each other to fix the position of the carrier plate 2.

[0026] like Figure 2 , Figure 4 , Figure 5 , Figure 6 As shown, as a preferred embodiment of the present invention, the limiting component 52 includes vertical grooves 521 opened on the surface of the carrying plate 2 and located on both sides of the electric heating plate 3, and sliding blocks 522 are slidably installed in the vertical grooves 521. Two groups of sliding blocks 522 relatively distributed on the surface of the two groups of carrying plates 2 are rotated together to install a carrying rod 523 located on the outer side of the electric heating plate 3, and multiple groups of brushes 51 are evenly distributed on the surface of the carrying rod 523.

[0027] The sliding block 522 slides in the vertical groove 521. When the heating plate 3 and the vertical groove 521 remain in a vertical state, the sliding block 522 is at the bottom of the vertical groove 521. The sliding block 522 and the bearing rod 523 cooperate with each other to support and position the brush 51. At this time, the brush 51 is at the bottom of the heating plate 3. When the heating plate 3 rotates, the bearing plate 2 drives the brush 51 to rotate synchronously. After the bearing plate 2 rotates more than ninety degrees, the vertical groove 521 is inclined, and the sliding block 522 is at one end of the vertical groove 521 at a high position. Under the action of gravity, the sliding block 522 slides downward along the direction of the vertical groove 521. The sliding block 522 and the bearing rod 523 cooperate with each other to control the brush 51 to slide along the surface of the heating plate 3.

[0028] like Figure 2 , Figure 4 , Figure 5 , Figure 6As shown, as a preferred embodiment of the present invention, the rotating assembly 53 includes a control gear disc 531 fixedly mounted on the surface of the supporting rod 523, and a side plate 532 located on the outside of the vertical groove 521 is fixedly mounted on the side wall of the supporting disc 2, and a rack 533 meshingly connected with the control gear disc 531 is fixedly mounted on the surface of the side plate 532.

[0029] When the bearing rod 523 translates outside the electric heating plate 3, it drives the control toothed disc 531 to move synchronously. The control toothed disc 531 rolls along the surface of the rack 533. The control toothed disc 531 drives the bearing rod 523 to rotate around its own axis during translation. The bearing rod 523 drives the brush 51 to rotate. When the brush 51 rotates, it can automatically clean the salt crystals attached to the surface of the electric heating plate 3.

[0030] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 As shown, as a preferred embodiment of the present invention, the sliding block 522 is made of magnetic material, and magnetic blocks 6 cooperating with the sliding block 522 are fixedly installed at both ends of the vertical slot 521 .

[0031] The magnetic block 6 is connected to the sliding block 522 as a whole through the magnetic attraction. After the supporting plate 2 rotates more than ninety degrees, the vertical groove 521 is inclined, and the sliding block 522 is at the higher end of the vertical groove 521. The magnetic block 6 can offset the gravity component of the sliding block 522 tilting downward through the magnetic attraction. When the supporting plate 2 continues to rotate, the sliding block 522 can always be located at the higher end of the vertical groove 521 and will not slide downward. Only when the vertical groove 521 rotates to a vertical state, the vertical downward gravity of the sliding block 522 is greater than the magnetic attraction of the magnetic block 6. At this time, the sliding block 522 moves downward in the vertical groove 521. The sliding block 522 cooperates with the magnetic block 6 to effectively increase the cleaning range of the brush 51, thereby cleaning the surface of the electric heating plate 3 in a de-orientation manner.

[0032] like Figure 2 , Figure 4 As shown in FIG. 1 , as a preferred embodiment of the present invention, the heights of the plurality of groups of electric heating plates 3 are gradually shortened from the middle to both sides.

[0033] like Figure 1 As shown, as a preferred embodiment of the present invention, support legs 7 are fixedly installed around the bottom wall of the evaporator box 1.

[0034] The working principle of the present invention is: when in use, the wastewater to be evaporated and concentrated is transported to the evaporation box 1 through the water injection pipe 13. Initially, the electric heating plate 3 is kept in a vertical state in the inner cavity of the evaporation box 1, and the sliding block 522 is at the bottom end of the vertical groove 521. The sliding block 522 and the bearing rod 523 cooperate with each other to support and position the brush 51. At this time, the brush 51 is at the bottom end of the electric heating plate 3, and the electric heating plate 3 is powered on, and the electric heating plate 3 performs high-temperature evaporation treatment on the wastewater in the evaporation box 1.

[0035] During distillation, wastewater is prone to produce salt crystals attached to the surface of the electric heating plate 3. When the salt crystals on the surface of the electric heating plate 3 need to be cleaned, the motor 44 drives the transmission column 42 to rotate, and the transmission column 42 drives the transmission gear plate 43 to rotate synchronously. The transmission gear plate 43 is meshed with the gear ring 41 for transmission, which can drive the carrier plate 2 to rotate on the inner wall of the evaporator box 1. The two groups of carrier plates 2 cooperate with each other to drive the electric heating plate 3 to rotate synchronously in the inner cavity of the evaporator box 1. After the electric heating plate 3 rotates one hundred and eighty degrees, the motor 44 controls the transmission gear plate 43 to stop rotating, and the transmission gear plate 43 and the gear ring 41 are engaged with each other to fix the position of the carrier plate 2. The bearing plate 2 drives the electric heating plate 3 to rotate synchronously by 180 degrees, and the electric heating plate 3 drives the brush 51 to rotate synchronously when rotating. After the electric heating plate 3 rotates more than 90 degrees, the vertical groove 521 is tilted at this time, and the sliding block 522 is at one end of the vertical groove 521 at a high position. Under the action of gravity, the sliding block 522 slides downward along the direction of the vertical groove 521. The sliding block 522 cooperates with the bearing rod 523 to control the brush 51 to slide along the surface of the electric heating plate 3. When the bearing rod 523 translates outside the electric heating plate 3, it drives the control toothed disc 531 to move synchronously, and the control toothed disc 531 rolls along the surface of the rack 533. The control toothed disc 531 drives the bearing rod 523 to rotate around its own axis when translating, and the bearing rod 523 drives the brush 51 to rotate. When the brush 51 rotates, the salt crystals attached to the surface of the electric heating plate 3 can be automatically cleaned. When the electric heating plate 3 needs to be cleaned, the supporting plate 2 is controlled to rotate 180 degrees again, and this cycle is repeated to automatically clean the salt crystals attached to the surface of the electric heating plate 3 for multiple times.

[0036] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A desulfurization wastewater evaporation and concentration device, comprising an evaporation box, the longitudinal cross-section of which is a circular structure, the top of which is provided with an air outlet, the bottom of which is provided with a guide pipe, and the side wall of which is provided with a water injection pipe, characterized in that: The two opposite inner walls of the evaporator box are respectively provided with carrying plates rotatably mounted thereon, and a plurality of groups of parallel distributed electric heating plates are fixedly mounted therebetween; a positioning assembly that cooperates with the carrying plate is provided between the two opposite side walls of the evaporator box, and the positioning assembly is used to control the carrying plate to rotate in the evaporator box and thus control the electric heating plate to rotate synchronously in the inner cavity of the evaporator box; a cleaning mechanism that cooperates with the electric heating plate is provided between the two groups of the carrying plates, and the cleaning mechanism includes a brush, a limiting assembly and a rotating assembly, wherein the brush is provided with a plurality of groups and is respectively located on both sides of the electric heating plate, the limiting assembly is located on the surface of the carrying plate and is connected to the brush, when the electric heating plate rotates in the inner cavity of the evaporator box, the limiting assembly controls the brush to translate and slide along the surface of the electric heating plate, and the rotating assembly is connected to the limiting assembly, and when the brush translates and slides along the surface of the electric heating plate, the rotating assembly controls the brush to rotate on the surface of the electric heating plate by cooperating with the limiting assembly.

2. A desulfurization wastewater evaporation and concentration device according to claim 1, characterized in that: The positioning assembly includes a gear ring arranged on the annular side wall of the supporting plate, and a transmission column is installed on the two opposite side walls of the evaporator box for rotation together. A transmission gear plate is fixedly installed on the surface of the transmission column, and the transmission gear plate is meshed with the gear ring. One end of the transmission column extends to the outside of the evaporator box and is connected to a motor.

3. A desulfurization wastewater evaporation and concentration device according to claim 1, characterized in that: The limiting component includes vertical grooves opened on the surface of the carrying plate and located on both sides of the electric heating plate, sliding blocks are slidably installed in the vertical grooves, two groups of sliding blocks relatively distributed on the surface of the two carrying plates are rotated together to install a carrying rod located on the outside of the electric heating plate, and multiple groups of brushes are evenly distributed on the surface of the carrying rod.

4. A desulfurization wastewater evaporation and concentration device according to claim 3, characterized in that: The rotating assembly includes a control gear disk fixedly mounted on the surface of the bearing rod, a side plate located outside the vertical groove is fixedly mounted on the side wall of the bearing disk, and a rack meshingly connected with the control gear disk is fixedly mounted on the surface of the side plate.

5. A desulfurization wastewater evaporation and concentration device according to claim 3, characterized in that: The sliding block is made of magnetic material, and magnetic blocks cooperating with the sliding block are fixedly mounted at both ends of the vertical slot.

6. A desulfurization wastewater evaporation and concentration device according to claim 1, characterized in that: The heights of the multiple groups of electric heating plates are gradually shortened from the middle to both sides.

7. A desulfurization wastewater evaporation and concentration device according to claim 1, characterized in that: Support legs are fixedly installed around the bottom wall of the evaporator box.

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