Anti-blocking flow-equalizing material distribution device of vacuum belt dehydrator

Abstract

The invention discloses a vacuum belt dehydrator anti-blocking flow-equalizing material distributing device which comprises a material distributing box, a first material distributing piece and a second material distributing piece, the first material distributing piece and the second material distributing piece are arranged in the material distributing box, the first material distributing piece comprises a first flow dividing inclined plate, a first overflow plate and a plurality of first flow deflectors, and the first overflow plate and a second inner wall are arranged at intervals and form a first flow passing gap; the second material distribution piece is arranged below the first material distribution piece, the second material distribution piece comprises a second flow distribution inclined plate, a porous sieve plate, a second overflow plate and a plurality of second flow deflectors, and the second overflow plate and the first inner wall are arranged in a spaced mode to form a second overflowing gap. The concentrated solution overflowed from the first overflowing gap can fall onto the second shunting inclined plate, and the concentrated solution containing large particles falling from sieve pores in the porous sieve plate falls onto the belt before the concentrated solution containing small particles falling from the second overflowing gap, so that layered distribution of the concentrated solution on the belt is realized. The device is high in material distribution uniformity, and the dewatering effect of the vacuum belt conveyor can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas treatment equipment, and particularly relates to a vacuum belt dewatering machine anti-blocking and uniform-flow material distribution device. BACKGROUND

[0002] Wet flue gas desulfurization (WFGD) is a widely used high-efficiency flue gas desulfurization technology in coal-fired power plants, metallurgy, chemical industry and other industries, which mainly removes sulfur dioxide by chemical reaction between alkaline liquid and sulfur dioxide in flue gas, thereby reducing air pollution.

[0003] During the operation of wet flue gas desulfurization, a certain amount of desulfurization wastewater needs to be discharged. The desulfurization wastewater is a kind of wastewater containing harmful substances such as high salt content, high hardness and heavy metal ions, and must be deeply treated to meet the national requirement of zero discharge of desulfurization wastewater. Multi-effect flash evaporation is an effective desulfurization wastewater treatment technology, and the treatment principle is to use the heat of steam to make the wastewater evaporate in multiple evaporation chambers with gradually reduced pressure, and finally obtain concentrated liquid and distilled water. The concentrated liquid is transported by a discharge pump to a material distribution device, and is distributed to a vacuum belt dewatering machine by the material distribution device for dewatering.

[0004] However, in the actual operation process, due to the simple structure of the traditional material distribution device, problems such as uneven material distribution affecting dewatering performance and liquid splashing polluting and corroding the equipment are prone to occur, and due to the high content of suspended solids in the concentrated liquid after multi-effect flash evaporation, problems such as scaling and blocking of the material distribution device are prone to occur. SUMMARY

[0005] The purpose of the present application is to provide a vacuum belt dewatering machine anti-blocking and uniform-flow material distribution device, which has high material distribution uniformity and helps to improve the dewatering effect of the downstream vacuum belt machine.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] The application discloses a vacuum belt dewatering machine anti-blocking and uniform-flow material distribution device, which is arranged above a belt of a vacuum belt machine and comprises a material distribution box, a first material distribution part and a second material distribution part.

[0008] Preferably, the first guide vanes are divided into at least two groups in the second direction, the first guide vanes in one group are arranged in a third direction, the first guide vanes in another group are arranged in a fourth direction, and the third direction and the fourth direction are both arranged in a downward direction and have opposite inclination directions.

[0009] Preferably, the first guide vanes are divided into an upper guide vane group and a lower guide vane group in the inclination direction of the first diversion inclined plate, the first guide vanes in the upper guide vane group are divided into at least two groups in the second direction, the first guide vanes in one group are arranged in a third direction, the first guide vanes in another group are arranged in a fourth direction, and the third direction and the fourth direction are both arranged in a downward direction and have opposite inclination directions, and the first guide vanes in the lower guide vane group are arranged in parallel in the second direction.

[0010] Preferably, the second guide vanes are arranged in parallel in the second direction.

[0011] Preferably, the first material piece is adjustable in the angle of inclination relative to the first inner wall, and the top end of the first shunt inclined plate is movably connected to the material box; and / or, the second material piece is adjustable in the angle of inclination relative to the second inner wall, and the top end of the second shunt inclined plate is movably connected to the material box.

[0012] Preferably, the vacuum belt dewatering machine anti-blocking and uniform-flow material distribution device further comprises a first supporting mechanism, one end of the first supporting mechanism is fixed to the material box, and the other end is connected to the first shunt inclined plate, and the first supporting mechanism adjusts the angle of inclination of the first material piece through extension and contraction; and / or, the vacuum belt dewatering machine anti-blocking and uniform-flow material distribution device further comprises a second supporting mechanism, one end of the second supporting mechanism is fixed to the material box, and the other end is connected to the second shunt inclined plate, and the second supporting mechanism adjusts the angle of inclination of the second material piece through extension and contraction.

[0013] Preferably, the vacuum belt dewatering machine anti-blocking and uniform-flow material distribution device further comprises a liquid distribution box, a liquid inlet is arranged on the liquid inlet end of the liquid distribution box, a plurality of liquid distribution outlets are arranged on the liquid outlet end of the liquid distribution box and are spaced apart in the second direction, and a plurality of liquid distribution inlets are arranged on the liquid inlet end of the material box and are in one-to-one correspondence with the plurality of liquid distribution outlets.

[0014] Preferably, a liquid inlet pipe is arranged at the liquid inlet, a first adjusting valve and a first flowmeter are arranged on the liquid inlet pipe; each group of liquid distribution outlets and liquid distribution inlets are communicated through a liquid distribution pipe, and a second adjusting valve and a second flowmeter are arranged on the liquid distribution pipe.

[0015] Preferably, a first shaker is arranged on the first shunt inclined plate; and / or, a second shaker is arranged on the second shunt inclined plate.

[0016] Preferably, the vacuum belt dewatering machine anti-blocking and uniform-flow material distribution device further comprises a flushing mechanism, the flushing mechanism comprises a first flush nozzle and a second flush nozzle, the first flush nozzle is used for spraying cleaning water to the first shunt inclined plate, and the second flush nozzle is used for spraying cleaning water to the second shunt inclined plate.

[0017] The beneficial effects of the present application are as follows:

[0018] The vacuum belt dewatering machine anti-blocking and uniform flow material distribution device provided by the application comprises a material distribution box, a first material distribution part and a second material distribution part. The concentrated solution of desulfurization wastewater enters the material distribution box from the liquid inlet end of the material distribution box. The concentrated solution entering the material distribution box falls on the first flow distribution inclined plate of the first material distribution part. After being distributed and guided by the plurality of first flow guide pieces, the concentrated solution is collected at the first overflow plate and then overflows the first overflow plate in the form of overflow. The concentrated solution reaching the second material distribution part falls on the second flow distribution inclined plate of the second material distribution part through the first flow gap formed between the first overflow plate and the second inner wall. The concentrated solution containing large particles falling from the sieve holes on the perforated sieve plate falls on the belt before the concentrated solution containing small particles falling from the second flow gap, so as to realize the layered distribution of the concentrated solution on the belt. The vacuum belt dewatering machine anti-blocking and uniform flow material distribution device improves the uniformity of the material distribution to a great extent through the distribution and guidance, multi-stage overflow and layered distribution, thereby helping to improve the dewatering effect of the vacuum belt machine arranged downstream. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a front view of the vacuum belt dewatering machine anti-blocking and uniform flow material distribution device provided by the application;

[0020] Figure 2 FIG. 2 is a first side view of the vacuum belt dewatering machine anti-blocking and uniform flow material distribution device provided by the application;

[0021] Figure 3 FIG. 3 is a second side view of the vacuum belt dewatering machine anti-blocking and uniform flow material distribution device provided by the application;

[0022] Figure 4 FIG. 4 is a top view of part of the structure of the vacuum belt dewatering machine anti-blocking and uniform flow material distribution device provided by the application.

[0023] In the drawings:

[0024] 100, material distribution box;

[0025] 200, first material distribution part; 201, first flow distribution inclined plate; 202, first overflow plate; 203, first flow guide piece;

[0026] 300, second material distribution part; 301, second flow distribution inclined plate; 302, perforated sieve plate; 303, second overflow plate; 304, second flow guide piece;

[0027] 400, liquid distribution box;

[0028] 500, liquid inlet pipe; 501, first adjusting valve; 502, first flow meter;

[0029] 600, distribution pipe; 601, second regulating valve; 602, second flow meter;

[0030] 710, first rapping device; 720, second rapping device; 730, first supporting mechanism;

[0031] 810, first flushing nozzle; 820, second flushing nozzle;

[0032] 900, PLC controller. DETAILED DESCRIPTION

[0033] The application will be further described below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended for the purpose of interpretation of the present application and are not intended to limit the present application. In addition, it should be noted that only the parts related to the present application are shown in the drawings for the purpose of description.

[0034] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] In the description of the present embodiment, the terms "upper", "lower", "right", and other orientation or position relationships are based on the orientation or position relationship shown in the drawings, and are only for the purpose of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] The present invention discloses a device for preventing and evenly distributing flow for a vacuum belt dehydrator. The device is arranged between a multiple-effect evaporator and a vacuum belt conveyor. The input end of the device is connected to the output end of the multiple-effect evaporator, and the output end of the device is arranged above the belt of the vacuum belt conveyor, thereby evenly distributing the concentrated desulfurization wastewater outputted from the multiple-effect evaporator onto the belt of the vacuum belt conveyor. Optionally, the multiple-effect evaporator is a triple-effect evaporator.

[0038] like Figures 1 to 4 As shown, the anti-blocking and uniform flow distribution device for the vacuum belt dehydrator includes a distribution box 100, a first distribution member 200, and a second distribution member 300. The first distribution member 200 and the second distribution member 300 are both arranged in the distribution box 100, and the first distribution member 200 is arranged above the second distribution member 300. The liquid inlet end of the distribution box 100 is used to supply the concentrated liquid of the desulfurization wastewater into the distribution box 100. The distribution box 100 also has a liquid outlet end. The distribution box 100 includes a first inner wall and a second inner wall arranged opposite to each other in a first direction. The first direction is as shown in FIG. Figure 1 Shown in direction a.

[0039] The first distribution member 200 is arranged in the upper space of the distribution box 100. The first distribution member 200 includes a first diverter inclined plate 201 and a first overflow plate 202 connected to each other. The first diverter inclined plate 201 is arranged obliquely downward, and the top of the first diverter inclined plate 201 is connected to the first inner wall of the distribution box 100. The bottom end of the first diverter inclined plate 201 is connected to one end of the first overflow plate 202. The first overflow plate 202 is spaced apart from the second inner wall at one end away from the first diverter inclined plate 201 and forms a first flow gap. The first overflow plate 202 is arranged obliquely upward so that a material storage space is formed between the first overflow plate 202 and the first diverter inclined plate 201. A plurality of first guide plates 203 are arranged on the first diverter inclined plate 201 and are used to achieve uniform flow of the concentrate in the second direction. The second direction is as follows: Figure 3 As shown in b.

[0040] The second distribution member 300 includes a second diversion inclined plate 301, a porous sieve plate 302 and a second overflow plate 303 connected in sequence from top to bottom. The second diversion inclined plate 301 is arranged obliquely downward, the top of the second diversion inclined plate 301 is connected to the second inner wall, the bottom end of the second diversion inclined plate 301 is connected to one end of the porous sieve plate 302, and the other end of the porous sieve plate 302 is connected to one end of the second overflow plate 303. The other end of the second overflow plate 303 away from the porous sieve plate 302 is spaced apart from the first inner wall and forms a second flow gap. The second overflow plate 303 is arranged obliquely upward relative to the porous sieve plate 302. A plurality of second guide plates 304 are arranged on the second diversion inclined plate 301 and are used to achieve uniform flow of the concentrated liquid in the second direction.

[0041] The flow path of the concentrated desulfurization wastewater in the anti-blocking and uniform flow material distribution device of the vacuum belt dewaterer is as follows: the concentrated desulfurization wastewater enters the distribution box 100 from the liquid inlet end of the distribution box 100. The concentrated liquid entering the distribution box 100 first falls on the first shunt inclined plate 201 of the first distribution piece 200. Since the first shunt inclined plate 201 is arranged obliquely downward, the concentrated liquid has a downward flow tendency. The plurality of first guide vanes 203 can achieve uniform distribution of the concentrated liquid in the second direction. After being shunted and guided by the plurality of first guide vanes 203, the concentrated liquid is collected in the material containing space and spreads over the first overflow plate 202 in the second direction. After the concentrated liquid fills the material containing space, it can uniformly overflow the first overflow plate 202 in an overflow manner and fall through the first overflow gap to the second shunt inclined plate 301 of the second distribution piece 300. The concentrated liquid reaching the second distribution piece 300 passes through the guide of the second shunt inclined plate 301 and the shunting of the plurality of second guide vanes 304 and reaches the perforated sieve plate 302. The second overflow plate 303 is arranged in a spaced manner with the first inner wall and forms a second overflow gap. The concentrated liquid containing large particles falling from the sieve holes on the perforated sieve plate 302 falls onto the belt before the concentrated liquid containing small particles falling from the second overflow gap, so as to form layered distribution of large particle perforated material and small particle overflow material, thereby realizing layered distribution of the concentrated liquid on the belt. The anti-blocking and uniform flow material distribution device of the vacuum belt dewaterer improves the uniformity of the material to a great extent through shunting and guiding, multi-stage overflow, and layered distribution, which helps to improve the dewatering effect of the vacuum belt machine arranged downstream, thereby effectively solving the problems of uneven material distribution, liquid splashing and the like existing in the anti-blocking and uniform flow material distribution device of the traditional vacuum belt dewaterer.

[0042] Regarding the structure of the distribution box 100, in some embodiments, the distribution box 100 is in the shape of a cube, and the distribution box 100 has a first side plate and a second side plate arranged in a spaced manner in the first direction, a third side plate and a fourth side plate arranged in a spaced manner in the second direction, and a top plate. Regarding the bottom plate of the distribution box 100, it can be provided or not provided, which is not specifically limited here. Of course, in other embodiments, the distribution box 100 can also be provided in other shapes according to needs, such as a cylindrical shape, other prismatic shapes, etc.

[0043] Regarding the structure of the first cloth piece 200, it should be noted that, in addition to the top end and the bottom end of the first shunt inclined plate 201, the other ends of the first shunt inclined plate 201 are connected with the inner wall surface of the cloth box 100 or are provided with baffles. In some embodiments, if the cloth box 100 is in the shape of a cube, the first shunt inclined plate 201 is a rectangular plate, in the first direction, the top end of the first shunt inclined plate 201 is connected with the first side plate, and the bottom end of the first shunt inclined plate 201 is connected with the first overflow plate 202; in the second direction, the two side ends of the first shunt inclined plate 201 are respectively connected with the third side plate and the fourth side plate, or the two ends of the first shunt inclined plate 201 in the second direction are both provided with baffles. If the cloth box 100 is in the shape of a cylinder, the first shunt inclined plate 201 can be an arc-shaped plate formed by a circular arc edge and a straight line edge.

[0044] In some embodiments, the first overflow plate 202 and the first shunt inclined plate 201 are both flat plates, and the length of the first overflow plate 202 in the inclined direction thereof is less than the length of the first shunt inclined plate 201 in the inclined direction thereof, so that the connection of the first overflow plate 202 and the first shunt inclined plate 201 is approximately in the shape of “√”.

[0045] In some embodiments, the plurality of first flow guide pieces 203 are arranged radially on the first shunt inclined plate 201 to improve the shunt flow guide effect. Optionally, the plurality of first flow guide pieces 203 are divided into at least two groups in the second direction, in two groups of first flow guide pieces 203 arranged adjacently, each first flow guide piece 203 in one group is arranged obliquely along a third direction, and each first flow guide piece 203 in the other group is arranged obliquely along a fourth direction, the third direction and the fourth direction are both arranged obliquely downward and the oblique directions thereof are opposite, the third direction is as shown in FIG. 2c, and the fourth direction is as shown in FIG. 2d. In a specific embodiment, the plurality of first flow guide pieces 203 are divided into two groups in the second direction, the third direction is a direction obliquely downward to the left on the first shunt inclined plate 201, the fourth direction is a direction obliquely downward to the right on the first shunt inclined plate 201, and further, the third direction and the fourth direction are perpendicular. Figure 2 Figure 2 In some parallel embodiments, the plurality of first flow guide pieces 203 are divided into an upper flow guide piece group and a lower flow guide piece group in the inclined direction of the first shunt inclined plate 201; all first flow guide pieces 203 in the upper flow guide piece group are divided into at least two groups in the second direction, in two groups of first flow guide pieces 203 arranged adjacently, each first flow guide piece 203 in one group is arranged obliquely along a third direction, and each first flow guide piece 203 in the other group is arranged obliquely along a fourth direction, the third direction and the fourth direction are both arranged obliquely downward and the oblique directions thereof are opposite; all first flow guide pieces 203 in the lower flow guide piece group are arranged spaced apart and parallel to each other in the second direction.

[0046] In some parallel embodiments, the plurality of first flow guide pieces 203 are divided into an upper flow guide piece group and a lower flow guide piece group in the inclined direction of the first shunt inclined plate 201; all first flow guide pieces 203 in the upper flow guide piece group are divided into at least two groups in the second direction, in two groups of first flow guide pieces 203 arranged adjacently, each first flow guide piece 203 in one group is arranged obliquely along a third direction, and each first flow guide piece 203 in the other group is arranged obliquely along a fourth direction, the third direction and the fourth direction are both arranged obliquely downward and the oblique directions thereof are opposite; all first flow guide pieces 203 in the lower flow guide piece group are arranged spaced apart and parallel to each other in the second direction.

[0047] ​In the process of flowing of the concentrated liquid at the first flow distribution baffle 201, the first overflow plate 202 and the first flow guide piece 203, there is scaling. In order to remove the scaling on the surface, in some embodiments, the first flow distribution baffle 201 is provided with a first rapping device 710. The intermittent vibration of the first rapping device 710 can remove the scaling on the surface. Optionally, the first rapping device 710 is arranged behind the first flow distribution baffle 201. The specific structure of the first rapping device 710 is prior art, which is not described in detail here.

[0048] With reference to the Figure 1 As shown in the figure, the anti-blocking and uniform-flow material distributing device of the vacuum belt dewatering machine further comprises a flushing mechanism. The flushing mechanism comprises a swingable first flushing nozzle 810. The first flushing nozzle 810 is externally connected to a water source through a water pipe and is used to spray cleaning water to the first flow distribution baffle 201. By spraying cleaning water to the first material 200 through the swingable first flushing nozzle 810, not only the scaling can be removed, but also the flushing range is large, the effect of removing the scaling is good, and the material concentration of the concentrated liquid can be adjusted by spraying water. It should be noted that the first rapping device 710 and the first flushing nozzle 810 can be arranged at the same time. By combining intermittent rapping and cleaning, the surface scaling can be deeply removed, so that the effect of removing the scaling is better. Of course, the first rapping device 710 and the first flushing nozzle 810 can also be arranged only one, which is low in cost.

[0049] Due to the different flow capacities of the concentrated liquid, in order to adjust the flow speed of the concentrated liquid on the first material 200 according to the needs, in some embodiments, the inclination angle of the first material 200 relative to the first inner wall is adjustable. The top end of the first flow distribution baffle 201 is movably connected to the material box 100. Optionally, the top end of the first flow distribution baffle 201 is rotatably connected to the material box 100 through a hinge piece or a hinge. Optionally, the range of the inclination angle is 30°-60°.

[0050] In some embodiments, the anti-blocking and uniform-flow material distributing device of the vacuum belt dewatering machine further comprises a first supporting mechanism 730. One end of the first supporting mechanism 730 is fixed to the material box 100, and the other end is connected to the first flow distribution baffle 201. The first supporting mechanism 730 adjusts the inclination angle of the first material 200 through extension and contraction. Optionally, the first supporting mechanism 730 is a pneumatic supporting telescopic rod. Of course, the first supporting mechanism 730 can also be a hydraulic telescopic rod.

[0051] As to the structure of the second cloth piece 300, in addition to the bottom end and the top end of the second flow distribution inclined plate 301, the other ends of the second flow distribution inclined plate 301 are connected with the inner wall surface of the cloth box 100 or provided with baffles. In some embodiments, if the cloth box 100 is in a cubic shape, the second flow distribution inclined plate 301 is a rectangular plate, and in the second direction, the top end of the second flow distribution inclined plate 301 is connected with the second side plate, and the bottom end of the second flow distribution inclined plate 301 is connected with the multi-hole sieve plate 302; in the second direction, the two side ends of the second flow distribution inclined plate 301 are respectively connected with the third side plate and the fourth side plate. If the cloth box 100 is in a cylindrical shape, the second flow distribution inclined plate 301 can be an arc-shaped plate formed by a circular arc edge and a straight line edge.

[0052] The multi-hole sieve plate 302 is a structure with a plurality of sieve holes, and in some embodiments, the vacuum belt dewatering machine anti-blocking uniform cloth distribution device has a plurality of multi-hole sieve plates 302 of different specifications, and the inner diameters of the sieve holes of each multi-hole sieve plate 302 are different. The multi-hole sieve plate 302 is detachably installed at the bottom end of the first flow distribution inclined plate 201, and different multi-hole sieve plates 302 with different sieve holes can be replaced according to the specific needs of layered cloth distribution.

[0053] In some embodiments, the second overflow plate 303 and the multi-hole sieve plate 302 are both flat plates, and the multi-hole sieve plate 302 is horizontally arranged, and the length of the second overflow plate 303 in the inclined direction is less than the length of the multi-hole sieve plate 302 in the horizontal direction. The second overflow plate 303 can be an upwardly inclined flat plate, or a folded plate including an upwardly inclined flat plate and a downwardly inclined flat plate connected in an inverted triangular shape.

[0054] Of course, in addition to setting the second flow distribution inclined plate 301, the second overflow plate 303 and the multi-hole sieve plate 302 as plate structures, an integrally formed table structure can also be provided, and the top surface of the table structure and the slotted flow distribution part, sieve hole part and overflow part are designed.

[0055] In some embodiments, a plurality of second flow guide pieces 304 are arranged in the second direction and are parallel to each other. Of course, in other embodiments, the form of the second flow guide piece 304 can also be the same as that of the first flow guide piece 203, that is, two groups of upper and lower groups, or arranged in a radial shape, and the specific details are not described here.

[0056] During the flow of the concentrated liquid at the second flow distribution inclined plate 301, the multi-hole sieve plate 302, the second overflow plate 303 and the second flow guide piece 304, there is also a scaling situation, in order to remove the scaling on the surface, in some embodiments, the second flow distribution inclined plate 301 is provided with a second rapping device 720, and the intermittent vibration of the second rapping device 720 can remove the scaling on the surface. Optionally, the second rapping device 720 is arranged behind the second flow distribution inclined plate 301. The specific structure of the second rapping device 720 is a prior art, and is not described in detail here.

[0057] With reference to both Figure 1 As shown, the flushing mechanism further comprises a second swingable flushing nozzle 820, the second flushing nozzle 820 is externally connected to a water source through a water pipe, and the second flushing nozzle 820 is used to spray cleaning water to the second distribution inclined plate 301. By spraying cleaning water to the second distribution member 300 through the second swingable flushing nozzle 820, not only the effect of removing scale can be achieved, but also the range of flushing is large, the effect of removing scale is good, and the material concentration of the concentrated solution can be adjusted by spraying water. It should be noted that the second rapping device 720 and the second flushing nozzle 820 can be provided at the same time, and the effect of removing scale is better when they are provided at the same time. Of course, the second rapping device 720 and the second flushing nozzle 820 can also be provided only one, which is low in cost.

[0058] Due to the different flow capacities of the concentrated solution, in order to adjust the flow speed of the concentrated solution on the second distribution member 300 according to the needs, in some embodiments, the inclination angle of the second distribution member 300 relative to the second inner wall is adjustable, and the top end of the second distribution inclined plate 301 is movably connected to the distribution box 100. Optionally, the top end of the second distribution inclined plate 301 is rotatably connected to the distribution box 100 through a hinge or a hinge. Optionally, the range of the inclination angle is 30°-60°.

[0059] In some embodiments, the vacuum belt dewatering machine anti-blocking and uniform-flow distribution device further comprises a second supporting mechanism (not shown in the figure), one end of the second supporting mechanism is fixed to the distribution box 100, and the other end is connected to the second distribution inclined plate 301. The second supporting mechanism adjusts the inclination angle of the second distribution member 300 through extension and contraction. Optionally, the second supporting mechanism is a pneumatic supporting telescopic rod, and of course, the second supporting mechanism can also be a hydraulic telescopic rod.

[0060] With reference to both Figures 1 to 3 As shown, the vacuum belt dewatering machine anti-blocking and uniform-flow distribution device further comprises a liquid distribution tank 400, a liquid inlet is arranged on the liquid inlet end of the liquid distribution tank 400, the liquid inlet is used to communicate with the outlet of the concentrated solution of the multi-effect evaporator, and the concentrated solution can be delivered to the liquid distribution tank 400 through the liquid inlet. A plurality of liquid distribution outlets are arranged on the liquid outlet end of the liquid distribution tank 400 and are spaced apart in the second direction. The liquid inlet end of the distribution box 100 is provided with a plurality of liquid distribution inlets, and the plurality of liquid distribution inlets and the plurality of liquid distribution outlets are in one-to-one correspondence and in communication. The concentrated solution entering the liquid distribution tank 400 flows out through the plurality of liquid distribution outlets and enters the distribution box 100 through the plurality of liquid distribution inlets, which is more conducive to uniformly distributing the concentrated solution in the distribution box 100.

[0061] In some embodiments, the liquid inlet is provided with a liquid inlet pipe 500, and the liquid inlet pipe 500 is provided with a first regulating valve 501 and a first flow meter 502. The first regulating valve 501 can be adjusted according to the rotating speed of the vacuum belt conveyor, so as to adjust the total wastewater flow of the concentrated liquid into the distribution tank 400. The first flow meter 502 is used to obtain the real-time flow in the liquid inlet pipe 500, so that the flow in the liquid inlet pipe 500 can be accurately adjusted to a target value. Optionally, the first regulating valve 501 is an electric regulating valve.

[0062] In some embodiments, each set of distribution outlet and distribution inlet is communicated through a distribution pipe 600, and the distribution pipe 600 is provided with a second regulating valve 601 and a second flow meter 602. The flow in the distribution pipe 600 can be adjusted through the second regulating valve 601, and the real-time flow in the distribution pipe 600 can be obtained through the second flow meter 602, so that the liquid flow in each distribution pipe 600 is equal. Optionally, the second regulating valve 601 is an electric regulating valve. According to the wastewater flow of the concentrated liquid and the size of the distribution tank 400, the number of distribution pipes 600 is set to 3-5, and the inner diameters of each distribution pipe 600 are the same.

[0063] Continuing to refer to Figure 3 As shown in the figure, the anti-blocking and uniform flow material distribution device of the vacuum belt conveyor further comprises a PLC controller 900, the first regulating valve 501, the first flow meter 502, the second regulating valve 601 and the second flow meter 602 are in communication connection with the PLC controller 900, the PLC controller 900 can control the first regulating valve 501 according to the first flow meter 502, and can control the second regulating valve 601 according to the second flow meter 602.

[0064] In the embodiment, the PLC controller 900 can run a control program, and then control the first regulating valve 501, the first flow meter 502, the second regulating valve 601, the second flow meter 602, the first supporting mechanism 730 and the second supporting mechanism to realize their functions respectively.

[0065] In summary, the anti-blocking and uniform flow material distribution device of the vacuum belt conveyor disclosed in the application has the following advantages:

[0066] Firstly, the distribution tank 400 is provided with a liquid inlet pipe 500 and a distribution pipe 600, and the liquid inlet pipe 500 and the distribution pipe 600 are both provided with flow meters and regulating valves, and the flow meters and the regulating valves are connected with the PLC controller 900, so that the liquid flow in each distribution pipe 600 is equal through automatic control, and the total flow of the liquid inlet pipe 500 is adjusted according to the rotating speed of the belt.

[0067] Second, the first flow distribution inclined plate 201 of the first cloth piece 200 is provided with a plurality of first flow guide vanes 203, and the second flow distribution inclined plate 301 of the second cloth piece 300 is provided with a plurality of second flow guide vanes 304. The plurality of first flow guide vanes 203 are arranged in a radial manner, and the plurality of second flow guide vanes 304 are arranged in a parallel manner, which is beneficial to improve the uniformity of cloth.

[0068] Third, the lower end of the second flow distribution inclined plate 301 is provided with a perforated sieve plate 302, and the front end of the perforated sieve plate 302 is provided with a second overflow plate 303 which is raised, forming layered cloth which combines large-particle perforated cloth and small-particle overflow cloth, which is beneficial to improve the uniformity of cloth and dehydration performance.

[0069] Fourth, the first flow distribution inclined plate 201 and the second flow distribution inclined plate 301 are both provided with a rapping device on the back surface, and the shell of the opposite cloth box 100 is provided with a washable nozzle which can swing, so that the surface scale can be removed in depth through intermittent rapping and cleaning.

[0070] The working principle of the anti-blocking and uniform-flow cloth device of the vacuum belt dewaterer is as follows:

[0071] The desulfurization wastewater (i.e. concentrated liquid) containing high suspended solids from the three-effect evaporator is sent to the distribution tank 400 through the discharge pump and the liquid inlet pipe 500, enters the cloth box 100 through a plurality of distribution pipes 600, and falls onto the first flow distribution inclined plate 201 of the first cloth piece 200. The first flow guide vanes 203 arranged in a radial manner are arranged on the surface of the first flow distribution inclined plate 201. Under the guidance of the plurality of first flow guide vanes 203, the concentrated liquid is uniformly collected at the bottom of the inclined plate, and uniformly overflowed from the upper end of the first overflow plate 202 raised at the lower end of the first flow distribution inclined plate 201 to the second flow distribution inclined plate 301 of the second cloth piece. The second flow guide vanes 304 arranged in parallel are arranged on the surface of the second flow distribution inclined plate 301. Under the guidance of the second flow guide vanes 304, the wastewater uniformly flows to the perforated sieve plate 302 at the lower end of the second flow distribution inclined plate 301. The wastewater containing large particles is uniformly distributed to the belt of the vacuum belt machine through the perforated sieve plate 302, and the wastewater containing small particles is mainly distributed to the belt of the vacuum belt machine in an overflow manner through the second overflow plate 303 raised at the front end of the sieve plate, forming layered cloth which combines large-particle perforated cloth and small-particle overflow cloth, which is beneficial to improve the uniformity of cloth and dehydration performance.

[0072] The PLC controller 900 receives the flow signals from the first flow meter 502 and the second flow meter 602, the rotation speed of the vacuum belt conveyor, the extension signals of the first supporting mechanism 730 and the second supporting mechanism, adjusts the first regulating valve 501 according to the rotation speed of the vacuum belt conveyor to regulate the total wastewater flow, and automatically regulates the second regulating valves 601 on each branch pipe 600 to realize equal liquid flow in each branch pipe 600; at the same time, the first supporting mechanism 730 is adjusted according to the discharging condition of the first flow distribution inclined plate 201 to realize uniform overflow at the lower end of the first flow distribution inclined plate 201. The PLC controller 900 simultaneously controls two rappers and two flushing nozzles to remove the scaling on the surfaces of the first flow distribution inclined plate 201 and the second flow distribution inclined plate 301 through intermittent rapping and flushing, and realizes long-term reliable operation.

[0073] In summary, the anti-blocking and uniform-flow material distribution device of the vacuum belt dewatering machine can effectively solve the problems of scaling and blocking, uneven discharging, liquid spattering and the like of the conventional anti-blocking and uniform-flow material distribution device of the vacuum belt dewatering machine, and improve the dewatering performance of the downstream vacuum belt conveyor through the combination of flow distribution, multi-stage overflow, vibration cleaning and layered material distribution and the like.

[0074] Obviously, the above embodiments of the present application are only examples for removing scaling and are not intended to limit the embodiments of the present application. Those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the protection scope of the present application. It is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A vacuum belt dehydrator anti-blocking flow distribution device, characterized in that: Used to be installed above the belt of a vacuum belt conveyor, the vacuum belt dehydrator anti-blocking flow distribution device includes: A distribution box (100), wherein a liquid inlet end of the distribution box (100) is used for supplying concentrated liquid of desulfurization wastewater, and the distribution box (100) comprises a first inner wall and a second inner wall arranged opposite to each other in a first direction; a first distribution member (200) disposed in the distribution box (100), the first distribution member (200) comprising a first diverter inclined plate (201) and a first overflow plate (202) connected to each other, the first diverter inclined plate (201) being disposed obliquely downward, the top end of the first diverter inclined plate (201) being connected to the first inner wall, the first overflow plate (202) being disposed obliquely upward, the first overflow plate (202) being spaced apart from the second inner wall to form a first flow-through gap, a plurality of first guide vanes (203) being disposed on the first diverter inclined plate (201) and being used to achieve uniform flow of the concentrated liquid in the second direction; a second distribution member (300) disposed in the distribution box (100) and below the first distribution member (200); the second distribution member (300) comprises a second diverter inclined plate (301), a porous sieve plate (302), and a second overflow plate (303) connected in sequence from top to bottom; the second diverter inclined plate (301) is disposed obliquely downward; the top end of the second diverter inclined plate (301) is connected to the second inner wall; the second overflow plate (303) is disposed obliquely upward relative to the porous sieve plate (302); the second overflow plate (303) is spaced apart from the first inner wall to form a second flow gap; a plurality of second guide vanes (304) are disposed on the second diverter inclined plate (301) and are used to achieve uniform flow of the concentrated liquid in the second direction; The concentrated liquid overflowing from the first overflow gap can fall onto the second diversion inclined plate (301), and the concentrated liquid containing large particles falling from the sieve holes on the porous sieve plate (302) falls onto the belt before the concentrated liquid containing small particles falling from the second overflow gap, thereby achieving layered distribution of the concentrated liquid on the belt.

2. The anti-blocking and flow-distributing device for a vacuum belt dehydrator according to claim 1 is characterized in that: A plurality of the first guide plates (203) are divided into at least two groups in the second direction; in the two adjacent groups of the first guide plates (203), each of the first guide plates (203) in one group is tilted along a third direction, and each of the first guide plates (203) in the other group is tilted along a fourth direction; the third direction and the fourth direction are both tilted downward and in opposite directions.

3. The anti-blocking and flow-distributing device for a vacuum belt dehydrator according to claim 1, characterized in that: The plurality of first guide vanes (203) are divided into an upper guide vane group and a lower guide vane group in the inclined direction of the first diverter inclined plate (201); All the first guide plates (203) in the upper guide plate group are divided into at least two groups in the second direction, and in the two adjacent groups of the first guide plates (203), the first guide plates (203) in one group are all arranged obliquely along the third direction, and the first guide plates (203) in the other group are all arranged obliquely along the fourth direction, and the third direction and the fourth direction are both arranged obliquely downward and in opposite directions; All the first guide plates (203) in the lower guide plate group are arranged at intervals in the second direction and are parallel to each other.

4. The anti-blocking and flow-distributing device for a vacuum belt dehydrator according to claim 1, characterized in that: A plurality of the second guide plates (304) are arranged at intervals in the second direction and are parallel to each other.

5. The anti-blocking and flow-distributing device for a vacuum belt dehydrator according to claim 1, characterized in that: The inclination angle of the first distribution member (200) relative to the first inner wall is adjustable, and the top end of the first diversion inclined plate (201) is movably connected to the distribution box (100); And / or, the inclination angle of the second distribution member (300) relative to the second inner wall is adjustable, and the top end of the second diversion inclined plate (301) is movably connected to the distribution box (100).

6. The anti-blocking and flow-distributing device for a vacuum belt dehydrator according to claim 5, characterized in that: The anti-blocking and flow-uniform distribution device for the vacuum belt dehydrator further comprises a first supporting mechanism (730), one end of the first supporting mechanism (730) being fixed to the distribution box (100), and the other end being connected to the first diversion inclined plate (201), and the first supporting mechanism (730) adjusting the inclination angle of the first distribution member (200) by telescoping; And / or, the anti-blocking and flow-uniform distribution device of the vacuum belt dehydrator further comprises a second supporting mechanism, one end of the second supporting mechanism is fixed to the distribution box (100), and the other end is connected to the second diversion inclined plate (301), and the second supporting mechanism adjusts the inclination angle of the second distribution member (300) by telescoping.

7. The anti-blocking and flow-distributing device for a vacuum belt dehydrator according to claim 1, characterized in that: The anti-blocking and uniform flow distribution device for the vacuum belt dehydrator further comprises a liquid separation box (400), a liquid inlet being provided on the liquid inlet end of the liquid separation box (400), a plurality of liquid separation outlets being provided on the liquid outlet end of the liquid separation box (400) and spaced apart in the second direction, a plurality of liquid separation inlets being provided on the liquid inlet end of the distribution box (100), and the plurality of liquid separation inlets being in one-to-one communication with the plurality of liquid separation outlets.

8. The anti-blocking and flow-distributing device for a vacuum belt dehydrator according to claim 7, characterized in that: A liquid inlet pipe (500) is provided at the liquid inlet, and a first regulating valve (501) and a first flow meter (502) are provided on the liquid inlet pipe (500); Each group of the liquid separation outlets and the liquid separation inlets are connected via a liquid separation pipe (600), and the liquid separation pipe (600) is provided with a second regulating valve (601) and a second flow meter (602).

9. The anti-blocking and flow-distributing device for a vacuum belt dehydrator according to claim 1, characterized in that: A first rapper (710) is provided on the first diversion inclined plate (201); And / or, a second rapper (720) is provided on the second diversion inclined plate (301).

10. The anti-blocking and flow-distributing device for a vacuum belt dehydrator according to claim 1, characterized in that: The anti-blocking and uniform flow distribution device of the vacuum belt dehydrator further comprises a flushing mechanism, wherein the flushing mechanism comprises a swingable first flushing nozzle (810) and a second flushing nozzle (820), wherein the first flushing nozzle (810) is used for spraying washing water onto the first diverter inclined plate (201), and the second flushing nozzle (820) is used for spraying washing water onto the second diverter inclined plate (301).

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