Plate type temperature adjusting equipment

Abstract

The plate-type temperature adjusting equipment comprises a box body, a plate-type temperature adjuster and a scale wiping unit, the plate-type temperature regulator and the scale wiping unit are arranged in the box body, liquid is contained in the box body, and the plate-type temperature regulator is used for being immersed into the liquid to regulate the temperature of the liquid; the plate-type thermolator is provided with a plurality of plate-shaped fluid channels which are arranged side by side at intervals from front to back, a fluid inlet hole and a fluid outlet hole are formed in the front side and the rear side of each plate-shaped fluid channel respectively, and the fluid inlet holes and the fluid outlet holes are formed in the positions, close to the left side and the right side, of the plate-shaped fluid channels respectively. And a scale wiping unit is arranged in a gap between every two adjacent plate-shaped fluid channels, and the scale wiping units continuously do reciprocating motion in the gaps through a driving unit to disturb the side walls of the plate-shaped fluid channels, so that scaling is prevented. According to the plate type temperature adjusting equipment, the temperature of fluid is adjusted, and meanwhile impurities possibly causing crystallization and scaling are removed.

Description

Technical Field

[0001] The invention belongs to temperature regulating equipment, in particular to a plate type temperature regulating equipment. Background Art

[0002] The sludge treatment process is to separate the solid residue and the filtrate after the screening, flocculation and dehydration processes, and the filtrate treatment methods widely used are mainly the concentrated liquid reinjection method, advanced oxidation method, evaporation method and membrane distillation method.

[0003] Chinese invention patent 202010219411.5 discloses a multi-effect evaporation concentration crystallizer and an evaporation concentration crystallization method, wherein the multi-effect evaporation concentration crystallizer includes a switchable evaporation concentration crystallization tank group, which is composed of a crystallizer X and a crystallizer Y; a heat exchange coil X is placed in the crystallizer X, and a heat exchange coil Y is placed in the crystallizer Y, and the front ends of the heat exchange coil X and the heat exchange coil Y are connected to the external steam supply through a pipe with a valve; the inner cavity of the crystallizer X is connected to the front end of the heat exchange coil Y through a pipe with a valve; the inner cavity of the crystallizer Y is connected to the front end of the heat exchange coil X through a pipe with a valve. The salt solution evaporation crystallization method is applied to the multi-effect evaporation concentration crystallizer. The structure and control of the equipment used in this method are complex, and it is difficult to avoid the scaling of the crystals on the outer wall of the heat exchange coil. The crystals pile up at the bottom, which easily causes the outlet to be blocked.

[0004] Crystallization scaling can bring many adverse effects, such as: 1. Reduced heat transfer efficiency: The presence of scale increases thermal resistance and hinders heat transfer. 2. Increased flow resistance: Narrowing the flow channel increases fluid flow resistance and increases energy consumption. 3. Shortened service life: The scale layer may cause local corrosion and shorten the service life of the heat exchanger.

[0005] In order to prevent crystallization and scaling, the existing technology generally adopts the following measures: 1. Regular cleaning: chemical cleaning or mechanical cleaning methods are used to remove the scale layer. 2. Optimize operating parameters: control fluid temperature, flow rate, etc. to avoid reaching crystallization conditions. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an anti-scaling plate-type temperature control device, which can remove impurities that may cause crystallization and scaling while regulating the temperature of the fluid.

[0007] The present invention is achieved in that: A plate-type temperature regulating device comprises: a box, a plate-type temperature regulator and a dirt wiping unit; the plate-type temperature regulator and the dirt wiping unit are arranged in the box, the box contains liquid, and the plate-type temperature regulator is used to be immersed in the liquid to adjust the temperature of the liquid; The plate-type thermostat has a plurality of plate-shaped fluid channels arranged side by side from front to back, each of the plate-shaped fluid channels is provided with a fluid inlet hole and a fluid outlet hole on the front and rear sides, respectively, and the fluid inlet hole and the fluid outlet hole are respectively arranged near the left and right sides of the plate-shaped fluid channel; the fluid outlet hole of the preceding plate-shaped fluid channel corresponds to the position of the fluid inlet hole of the succeeding plate-shaped fluid channel; The temperature-adjusting fluid flows from the fluid inlet hole of the first plate-shaped fluid channel, flows out from the fluid outlet hole of the first plate-shaped fluid channel, enters the fluid inlet hole of the second plate-shaped fluid channel, flows out from the fluid outlet hole of the second plate-shaped fluid channel, enters the fluid inlet hole of the third plate-shaped fluid channel, and so on, and finally flows out from the fluid outlet hole of the last plate-shaped fluid channel; The dirt wiping unit is arranged in the gap between every two adjacent plate-shaped fluid channels. The dirt wiping unit continuously performs reciprocating motion in the gap through a driving unit to disturb the side wall of the plate-shaped fluid channel to prevent scaling.

[0008] Furthermore, each of the plate-shaped fluid channels is divided into n layers from top to bottom, where n is a natural number, and each layer is provided with corresponding fluid inlet and outlet holes; The fluid flows from the first layer of the first plate-shaped fluid channel to the first layer of the last plate-shaped fluid channel from front to back, Flow from the first layer of the last plate-shaped fluid channel to the next layer, and then flow from back to front to the next layer of the first plate-shaped fluid channel, By analogy, the fluid circulates back and forth in the n-layer fluid channel, and circulates left and right in each layer, and finally flows out of the n-th layer of fluid channel.

[0009] Furthermore, each of the plate-shaped fluid channels comprises: a first heat transfer plate, an integral closed sealing gasket, and a second heat transfer plate which are pressed and stacked; All of the plate-shaped fluid channels are connected in series through a plurality of string rods; The fluid outlet hole of the first plate-shaped fluid channel and the fluid inlet hole of the second plate-shaped fluid channel are connected via a partially closed sealing gasket; The edge of each of the plate-shaped fluid channels and each of the partially closed sealing gaskets is provided with a plurality of serial connection holes allowing the string rods to pass therethrough; A gap is formed between each two adjacent plate-shaped fluid channels except for the partially closed sealing gasket, and a gasket is sleeved on the string rod at the gap; The two ends of the string rod are respectively fixedly mounted on the first heat transfer plate of the first plate-shaped fluid channel and the second heat transfer plate of the last plate-shaped fluid channel serving as a fixed frame plate.

[0010] Furthermore, each of the integral closed sealing gaskets and each of the partial closed sealing gaskets are provided with n layers of fluid channels from top to bottom; the first heat transfer plate and the second heat transfer plate of each layer of fluid channel are provided with corresponding fluid inlet and outlet holes; the fluid circulates back and forth in the n layers of fluid channels, and circulates left and right in each layer, and finally flows out from the nth layer of fluid channel.

[0011] Furthermore, at the middle of the plate-type thermostat, there is one or more of the first heat transfer plates or the second heat transfer plates as fixed frame plates, and the plate-type thermostat is segmented and spliced ​​using multiple groups of string rods, and the positions of the string rods between two adjacent segments are staggered.

[0012] Furthermore, the driving unit comprises: a transmission mechanism, a guide plate, and a group of driving shafts; the group of driving shafts is passed through the guide plate through a group of eccentric devices mounted thereon; the dirt wiping unit is fixedly connected to the guide plate; the group of driving shafts is mounted on the two side walls of the box body, and is connected to a power source arranged outside the box body through the transmission mechanism; the group of driving shafts rotates at the same speed and in the same direction under the drive of the power source, driving the guide plate and the dirt wiping unit to perform reciprocating synchronous circular motion.

[0013] The advantages of the present invention are: 1. High heat transfer efficiency: Due to the special design and close arrangement of the plates, the heat transfer area is large and the heat exchange efficiency is high.

[0014] 2. Compact structure: It takes up little space, is relatively light, and is easy to install and transport.

[0015] 3. Strong flexibility: The number of plates can be increased or decreased to meet different heat load requirements.

[0016] 4. Easy to clean: The plates can be disassembled for easy cleaning and maintenance, and can effectively prevent dirt and scaling.

[0017] 5. Lower cost: Under the same heat transfer task, its manufacturing cost is usually lower than that of shell and tube heat exchanger.

[0018] 6. Self-cleaning: The scale wiping unit extends into the plate thermostat to disturb the two sides of the gap of the plate thermostat to reduce the adhesion, scaling and deposition of solutes on the plate thermostat. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the decomposition structure of the present invention.

[0022] Figure 3 It is a schematic diagram of the exploded structure of the plate-type thermostat and the scaling unit in the first embodiment of the present invention.

[0023] Figure 4 It is a schematic diagram of the exploded structure of the plate-type thermostat and the scaling unit in the second embodiment of the present invention.

[0024] Figure 5 It is a schematic diagram of the exploded structure of the plate-type thermostat and the scaling unit in the third embodiment of the present invention.

[0025] Figure 6 It is a schematic diagram of the exploded structure of the plate-type thermostat and the scaling unit in the fourth embodiment of the present invention. DETAILED DESCRIPTION

[0026] The present invention provides a plate-type temperature control device, such as Figure 1 and Figure 2 As shown, it includes: a box body 1, a plate thermostat 2 and a dirt wiping unit 3; the plate thermostat 2 and the dirt wiping unit 3 are arranged in the box body, the box body 1 contains liquid, and the plate thermostat 2 is used to be immersed in the liquid to adjust the temperature of the liquid; the dirt wiping unit 3 continuously performs reciprocating motion in the gap of the plate thermostat 2 through the driving unit 4 to prevent scale from forming on the side wall of the plate thermostat 2 and causing blockage.

[0027] The plate heat exchanger of the prior art is composed of a group of corrugated metal plates with four corner holes for two liquids to transfer heat. The metal plates are installed in a frame with a fixed plate and a movable clamping plate on the side and clamped with clamping bolts. Sealing gaskets are installed on the plates to seal the fluid channels and guide the fluids to flow alternately into their respective channels to form heat exchange. The plate thermostat 2 in the present invention draws on the structure of the existing plate heat exchanger, and only one fluid is allowed to pass through. The two plates through which the other fluid passes are not sealed, leaving a gap, allowing the wiping unit 3 to extend into the gap for disturbance.

[0028] like Figure 3 As shown, as a first embodiment, the plate-type thermostat 2 comprises: a plurality of plate-shaped fluid channels 21 arranged in parallel and connected in series through a plurality of string rods 22 into one body.

[0029] Each plate-shaped fluid channel 21 comprises: a first heat transfer plate 211, an integral closed sealing gasket 212, and a second heat transfer plate 213 which are pressed and stacked to form a fluid channel; a fluid inlet hole 2111 is provided on the first heat transfer plate 211, and a fluid outlet hole 2131 is provided on the second heat transfer plate 213; the fluid inlet hole 2111 and the fluid outlet hole 2131 are respectively located at the beginning and the end of the plate-shaped fluid channel 21; the fluid outlet hole 2131 of the previous plate-shaped fluid channel 21 and the fluid inlet hole 2111 of the next plate-shaped fluid channel 21 are located at corresponding positions, and are connected through the partially closed sealing gasket 23; a plurality of serial holes 24 are provided at intervals on the edges of each plate-shaped fluid channel 21 and each partially closed sealing gasket 23 to allow the string rod 22 to pass through; the two ends of the string rod 22 are respectively fixedly mounted on the first heat transfer plate 211 of the first plate-shaped fluid channel 21 as a fixed frame plate and the second heat transfer plate 213 of the last plate-shaped fluid channel 21; The temperature regulating fluid passes through the fluid inlet hole 2111 of the first plate-shaped fluid channel 21, flows from the fluid outlet hole 2131 of the first plate-shaped fluid channel 21 into the fluid inlet hole 2111 of the second plate-shaped fluid channel 21, flows from the fluid outlet hole 2131 of the second fluid group component 21 into the fluid inlet hole 2111 of the third plate-shaped fluid channel 21, and so on, and finally flows out from the fluid outlet hole 2131 of the last plate-shaped fluid channel 21.

[0030] A gap is formed between each two adjacent plate-like fluid channels 21 except for the fluid channel formed by the partially closed sealing gasket 23. A gasket 25 is sleeved on the string rod 22 in the gap. A dirt wiping unit 3 performing reciprocating motion is provided in the gap. The dirt wiping unit 3 performs reciprocating synchronous circular motion under the drive of the driving unit 4.

[0031] The driving unit 4 includes: a transmission mechanism 41, a guide plate 42, and a group of driving shafts 43; a group of driving shafts 43 are inserted into the guide plate 42 through a group of eccentric devices 44 mounted thereon; the top of the wiping unit 3 is fixedly connected to the guide plate 42 through a group of fixing rods 45; a group of driving shafts 43 are mounted on the two side walls of the box body 1, and are connected to a motor 46 arranged outside the box body 1 through the transmission mechanism 41, and the motor 46 is connected to the driving shafts 43 through a magnetic coupling 47; a group of driving shafts 43 rotate at the same speed and in the same direction under the drive of the motor 46, driving the guide plate 42 and the wiping unit 3 to perform reciprocating synchronous circular motion.

[0032] During specific installation, the middle part of the plate thermostat 2 has one or more first heat transfer plates 211 or second heat transfer plates 213 as fixed frame plates. The plate thermostat 2 is segmented and spliced ​​using multiple groups of string rods 22, and the positions of the string rods 22 between two adjacent segments are staggered.

[0033] In this embodiment, a fluid inlet plate is added before the first heat transfer plate 211 of the first plate-shaped fluid channel 21 as a fixed frame plate A (with a fluid inlet hole A1), and a fluid outlet plate is added after the second heat transfer plate 213 of the last plate-shaped fluid channel 21 as a fixed frame plate B (with a fluid outlet hole B1). In specific practice, the first heat transfer plate 211 of the first plate-shaped fluid channel 21 and the second heat transfer plate 213 of the last plate-shaped fluid channel 21 can also be directly used as fixed frame plates. The fluid flows from the first plate-shaped fluid channel 21 to the last plate-shaped fluid channel 21 in a circuitous manner.

[0034] In addition, it should be noted that this embodiment only provides a specific method for manufacturing a plate-like fluid channel. In actual practice, the plate-like fluid channel can also be manufactured by other methods. For example, processing a hollow plate-like box as a plate-like fluid channel at one time is also a feasible solution.

[0035] As a second embodiment, the difference from the first embodiment is that each integral closed sealing gasket 212 and each partial closed sealing gasket 23 are divided into n layers from top to bottom; each first heat transfer plate 211 has n fluid inlet holes, and each second heat transfer plate 213 has n fluid outlet holes; in this embodiment, n=2, such as Figure 4 shown.

[0036] The fixed frame plate A serves as a fluid inlet and outlet plate, and is provided with a first hole A1 and a second hole A2, and the first hole A1 and the second hole A2 are respectively connected to one of the fluid inlet holes 2111 on the first heat transfer plate 211 of the first plate-shaped fluid channel 21; The fixed frame plate B is used as a fluid sealing plate (without holes thereon), and a first fluid direction conversion plate C is also provided between the fluid sealing plate (fixed frame plate B) and the second heat transfer plate 213 of the last plate-shaped fluid channel 21. The first fluid direction conversion plate C has a through hole C1, so that the fluid flowing out of one fluid outlet hole of the second heat transfer plate 213 of the last plate-shaped fluid channel 21 flows into another fluid outlet hole, thereby changing the direction of the fluid and flowing in a circuitous manner to the second hole A2 of the fluid inlet and outlet plate (fixed frame plate A) and out. The fluid flows from front to back in multiple plate-shaped fluid channels 21, and then from back to front back to the second hole A2 of the fixed frame plate A, and circulates left and right in each layer, and finally flows out from the second hole A2 of the fixed frame plate A.

[0037] As a third embodiment, the difference from the second embodiment is that: wherein n=4, such as Figure 5As shown, a second fluid direction conversion plate D is further provided between the fluid inlet and outlet plate (fixed frame plate A) and the first heat transfer plate 211 of the first plate-shaped fluid channel 21, and a fluid inlet hole D1, a fluid outlet hole D2 and a through hole D3 are provided on the second fluid direction conversion plate D, and two through holes C1 and C2 are provided on the first fluid direction conversion plate C (if n is an even number greater than 4, the number of through holes in both the first fluid direction conversion plate C and the second fluid direction conversion plate D need to be increased accordingly).

[0038] The first hole A1 on the fluid inlet and outlet plate (fixed frame plate A) is connected to the fluid inlet hole D1 on the second fluid direction conversion plate D. The through hole D3 on the second fluid direction conversion plate D allows the fluid to change direction and flow to the second hole A2 of the fluid inlet and outlet plate to flow out.

[0039] As a fourth embodiment, the difference from the third embodiment is that: wherein n=3, such as Figure 6 As shown, the fluid inlet and outlet plate (fixed frame plate A) is replaced by a fluid inlet plate with only a fluid inlet hole A1, the fluid sealing plate (fixed frame plate B) is replaced by a fluid outlet plate with only a fluid outlet B1, the first fluid direction conversion plate C is provided with a through hole C1 and a fluid outlet hole C4, and the second fluid direction conversion plate D is provided with a fluid inlet hole D1 and a through hole D3 (if n is an odd number greater than 3, the number of through holes in the first fluid direction conversion plate C and the second fluid direction conversion plate D needs to be increased accordingly).

[0040] The plate-type temperature regulating device of the present invention can be used for material precooling, material preheating, evaporation concentration, evaporation crystallization or cooling crystallization.

[0041] The plate type thermostat of the present invention has the following advantages: 1. High heat transfer efficiency: Due to the special design and close arrangement of the plates, the heat transfer area is large and the heat exchange efficiency is high.

[0042] 2. Compact structure: It takes up little space, is relatively light, and is easy to install and transport.

[0043] 3. Strong flexibility: The number of plates can be increased or decreased to meet different heat load requirements.

[0044] 4. Easy to clean: The plates can be disassembled for easy cleaning and maintenance, and can effectively prevent dirt and scaling.

[0045] 5. Lower cost: Under the same heat transfer task, its manufacturing cost is usually lower than that of shell and tube heat exchanger.

[0046] 6. Self-cleaning: The scale wiping unit extends into the plate thermostat to disturb the two sides of the gap of the plate thermostat to reduce the adhesion, scaling and deposition of solutes on the plate thermostat.

[0047] The present invention can prevent crystal scaling or clogging, and can maintain the performance of the plate thermostat continuously and stably regardless of the low-temperature evaporation environment of negative pressure or the high-temperature evaporation environment of MVR. It can be applied to processes such as material preheating, evaporation concentration, evaporation crystallization, material precooling, cooling crystallization, etc.

[0048] It should be noted that, in the description of the present invention, the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only simplified descriptions for the convenience of describing the invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0049] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A plate-type temperature control device, characterized in that: include: A box, a plate-type thermostat and a dirt-wiping unit; the plate-type thermostat and the dirt-wiping unit are arranged in the box, the box contains liquid, and the plate-type thermostat is used to be immersed in the liquid to adjust the temperature of the liquid; The plate-type thermostat has a plurality of plate-shaped fluid channels arranged side by side from front to back, each of the plate-shaped fluid channels is provided with a fluid inlet hole and a fluid outlet hole on the front and rear sides, respectively, and the fluid inlet hole and the fluid outlet hole are respectively arranged near the left and right sides of the plate-shaped fluid channel; the fluid outlet hole of the preceding plate-shaped fluid channel corresponds to the position of the fluid inlet hole of the succeeding plate-shaped fluid channel; The temperature-adjusting fluid flows from the fluid inlet hole of the first plate-shaped fluid channel, flows out from the fluid outlet hole of the first plate-shaped fluid channel, enters the fluid inlet hole of the second plate-shaped fluid channel, flows out from the fluid outlet hole of the second plate-shaped fluid channel, enters the fluid inlet hole of the third plate-shaped fluid channel, and so on, and finally flows out from the fluid outlet hole of the last plate-shaped fluid channel; The dirt wiping unit is arranged in the gap between every two adjacent plate-shaped fluid channels. The dirt wiping unit continuously performs reciprocating motion in the gap through a driving unit to disturb the side wall of the plate-shaped fluid channel to prevent scaling.

2. A plate-type temperature control device as claimed in claim 1, characterized in that: Each of the plate-shaped fluid channels is divided into n layers from top to bottom, where n is a natural number, and each layer is provided with corresponding fluid inlet and outlet holes; The fluid flows from the first layer of the first plate-shaped fluid channel to the first layer of the last plate-shaped fluid channel from front to back, Flow from the first layer of the last plate-shaped fluid channel to the next layer, and then flow from back to front to the next layer of the first plate-shaped fluid channel, By analogy, the fluid circulates back and forth in the n-layer fluid channel, and circulates left and right in each layer, and finally flows out of the n-th layer of fluid channel.

3. The plate-type temperature control device according to claim 1, characterized in that: Each of the plate-shaped fluid channels comprises: a first heat transfer plate, an integral closed sealing gasket, and a second heat transfer plate which are pressed and overlapped; All of the plate-shaped fluid channels are connected in series through a plurality of string rods; The fluid outlet hole of the first plate-shaped fluid channel and the fluid inlet hole of the second plate-shaped fluid channel are connected via a partially closed sealing gasket; The edges of each of the plate-shaped fluid channels and each of the partially closed sealing gaskets are provided with a plurality of serial connection holes for allowing the string rods to pass therethrough; A gap is formed between each two adjacent plate-shaped fluid channels except for the partially closed sealing gasket, and a gasket is sleeved on the string rod at the gap; The two ends of the string rod are respectively fixedly mounted on the first heat transfer plate of the first plate-shaped fluid channel and the second heat transfer plate of the last plate-shaped fluid channel serving as a fixed frame plate.

4. A plate-type temperature control device as claimed in claim 3, characterized in that: Each of the integral closed sealing gaskets and each of the partial closed sealing gaskets are provided with n layers of fluid channels from top to bottom; the first heat transfer plate and the second heat transfer plate of each layer of fluid channel are provided with corresponding fluid inlet and outlet holes; the fluid circulates back and forth in the n layers of fluid channels, and circulates left and right in each layer, and finally flows out from the nth layer of fluid channel.

5. The plate-type temperature regulating device according to claim 3, characterized in that: The middle part of the plate-type thermostat has one or more of the first heat transfer plates or the second heat transfer plates as fixed frame plates. The plate-type thermostat is segmented and spliced ​​using multiple groups of string rods, and the positions of the string rods between two adjacent segments are staggered.

6. The plate-type temperature regulating device according to claim 1, characterized in that: The driving unit comprises: a transmission mechanism, a guide plate, and a group of driving shafts; the group of driving shafts is passed through the guide plate through a group of eccentric devices sleeved thereon; the dirt wiping unit is fixedly connected to the guide plate; the group of driving shafts is mounted on the two side walls of the box body, and is connected to a power source arranged outside the box body through the transmission mechanism; the group of driving shafts rotates at the same speed and in the same direction under the drive of the power source, driving the guide plate and the dirt wiping unit to perform reciprocating synchronous circular motion.

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