WO2022143584A1

WO2022143584A1 - Heat-resistant electromagnetic heating plate

Info

Publication number: WO2022143584A1
Application number: PCT/CN2021/141847
Authority: WO
Inventors: 吴威; 汤建文
Original assignee: 第一环保深圳股份有限公司
Priority date: 2020-12-30
Filing date: 2021-12-28
Publication date: 2022-07-07
Also published as: CN112807771A; CN112807770A

Abstract

A heat-resistant electromagnetic heating plate, comprising a heat-resistant electromagnetic coil core plate (10), and heating plates (21) and filter cake frames (31) sequentially covered on two sides of said core plate in a mirror manner by taking said core plate as a center, wherein filter chambers (32) are formed by inner side surfaces (34) of the filter cake frames and the surfaces of the heating plates (21) away from the heat-resistant electromagnetic coil core plate (10). The heat-resistant electromagnetic coil core plate (10) is an integrated whole body formed by heating and curing a high-temperature-resistant composite material containing an electromagnetic coil (11) in the middle, and the heating plates (21) comprising liquid outlet holes (23) are directly covered above a groove (15).

Description

Heat-resistant electromagnetic heating plate

technical field

The invention relates to the field of filter presses, in particular to a heat-resistant electromagnetic heating plate.

Background technique

A filter press is a special filter medium that exerts a certain pressure on the object to cause liquid dialysis. It is a commonly used solid-liquid separation equipment. It is very popular in the environmental protection industry, such as the treatment of sewage, because the sewage contains a large amount of sludge and harmful substances, which can be better separated by the filter press, and the filter cake formed by the filter press is heated and dried. The heating filter plate directly affects the effect of the filter press.

technical problem

The heating part of the core of the existing heating plate---the heating core plate is composed of multiple parts fastened together, so the compression effect is poor, the structure is complicated, the production process is many, the energy consumption is increased, and the service life is short. , In addition, in the heating contact working surface, in order to better dredge the discharge effect of liquid or steam, a heating surface with grooves is often used, which often makes the filter residue stuck in the groove during the extrusion process and is not easy to fall off.

technical solutions

Based on this, it is necessary to provide a heat-resistant electromagnetic heating plate. The electromagnetic coil core plate is formed by heating and melting a high temperature resistant composite material containing electromagnetic coils. A heat-resistant electromagnetic heating plate, comprising a heat-resistant electromagnetic coil core plate, which is mirror-symmetrically covered with a heating plate and a filter cake frame on both sides as the center, and the outlines of the electromagnetic coil core plate and the filter cake frame are consistent in size. The filter cake frame is a hollow frame-shaped structure, and the inner side of the filter cake frame is formed around the hollow frame; wherein, the outer contour of the heating plate is consistent with the settlement area on the electromagnetic coil core plate and is assembled in it, and the heating plate and the The electromagnetic coil core plates are respectively provided with corresponding feeding holes in the vertical direction of the respective plate surfaces. The feeding holes of the heating plate and the feeding holes of the electromagnetic coil core plate have the same diameter and are sealed and connected to the periphery. The filtrate holes provided on the filter cake frame are connected to the electromagnetic coil. The hole diameter of the filtrate holes provided on the coil core plate is consistent and facing the surrounding sealing connection; the electromagnetic coil core plate is sealed and connected with the filter cake frame; the inner side of the filter cake frame and the side of the heating plate away from the electromagnetic coil core plate constitute a filter chamber . When placed in the filter press, the two functional plates of the heating plate and the filter press plate are arranged at intervals, and the filtrate holes or feed holes of each functional plate face the through holes formed by the combined arrangement to form a tubular structure. The filter press object enters the filter chamber of each functional board from the feed through hole to the groove on the feeder of the feed port of each functional board, and the filtrate flows into the filtrate through hole through the filtrate hole on each functional board within the formed pipeline. In the process of making the filter cake, the electromagnetic coil core plate is energized to generate a changing electromagnetic field, so that the heating plate generates eddy current and generates heat.

Further, the filter cake frame is square, and the filtrate holes are symmetrically arranged at four corners of the filter cake frame with the vertical centerline of the filter cake frame as the center.

Further, the electromagnetic coil core board is an integrated whole formed by heating and curing a temperature-resistant composite material containing an electromagnetic coil in the middle. The heating plate formed in this way has strong anti-extrusion ability and good temperature resistance effect, and the material can withstand high temperature up to 210°C.

The settling areas are provided on both sides of the electromagnetic coil core plate, and the contours are concave areas corresponding to the contours of the filter chamber.

Further, the two sides of the electromagnetic coil core plate are provided with a plurality of liquid passage grooves separated by vertical walls, and the two ends of all the liquid passage grooves are provided with communicating liquid collecting grooves. It is one end of the underflow channel, and the other end of the underflow channel is connected to the filtrate port. The vertical wall isolates the liquid collecting tank, and at the same time plays the role of supporting the heating plate. Due to the limited thickness of the heating plate, it bears a relatively high pressure during the extrusion process of the filter cake, so that the vertical wall plays a strong supporting role.

Further, the heating plate is a stainless steel flat plate. The material model can be 430, 304 or 316, etc. The stainless steel contains iron and has good magnetic permeability. Under the action of the electromagnetic coil core plate, eddy current heating can be generated. In addition, it has strong pressure resistance, no rust and durable. for better selection. Of course, in different places of use, according to different needs, the heating plate can also choose other iron-containing materials.

Further, the middle part of the heating plate is covered with liquid outlet holes. The heating plate here not only heats the filter cake, but also releases the liquid or moisture produced by the squeezed or heated filter cake, so there are a large number of micropores and no large pits on it, so after heating and drying The filter cake falls off easily.

Further, the diameter of the liquid outlet hole is 4-8 mm. The pore size should not be too large. If the pore size is too large, the filter cloth may be trapped, causing blockage, and the filter cake will not easily fall off. If it is too small, the filtrate will not easily flow.

Further, the liquid passage groove is a horizontal or vertical straight groove, the vertical wall is a horizontal or vertical straight wall, the width of the vertical wall is 8-12 mm, and the width of the liquid passage groove is 15-18 mm.

Further, the filter cake produced by the filter chamber, the liquid or its vapor produced by pressing or heating can enter the liquid passage through the liquid hole of the heating plate, and flow into the liquid collecting tank from the liquid passage and enter the undercurrent from the undercurrent hole. and then to the filtrate hole.

In the present invention, a process method for manufacturing a heat-resistant electromagnetic coil core plate in a heat-resistant electromagnetic heating plate.

The three prefabricated molds include a lower mold, a middle mold, and an upper mold. The bottom end of the lower mold includes one side of the core plate, and the top end of the upper mold includes the other side of the core plate. The middle mold includes a groove for placing the electromagnetic coil path; the processing steps of the core board are: step 1, laying a required amount of resin composite material in the lower molding mold; step 2, covering the resin composite material Forming the middle mold, the surface including the grooves is the material contact surface; step 3, after applying pressure on the upper end of the molding middle mold for a certain period of time, take out the molding middle mold; The groove path completes the laying of the electromagnetic coil; in step 5, a sufficient amount of the resin composite material is added to the lower molding mold to cover the upper molding mold, and the pressure is increased on the upper molding mold, and the temperature is raised to a sufficient material flow temperature and kept constant for a limited time. After cooling to room temperature.

beneficial effect

Such a core board has good anti-extrusion effect, simple structure, low energy consumption and long service life. In addition, a metal heating plate with micropores is used to directly cover the top of the groove, which can not only make the liquid or steam seep out from the filter cloth covered in the filter chamber after pressing and heating the filter cake, but also have a good discharge effect. It can make the filter cake or filter residue fall off easily.

Description of drawings

FIG. 1 is a schematic exploded perspective view of the heat-resistant electromagnetic heating plate of the present invention including the heat-resistant electromagnetic coil core plate, which is cut and separated.

FIG. 2 is a schematic perspective view of the whole heat-resistant electromagnetic heating plate of the present invention.

3 is a schematic front view of the heating plate in the heat-resistant electromagnetic heating plate of the present invention.

4 is a schematic front view of the heat-resistant electromagnetic coil core plate in the heat-resistant electromagnetic heating plate of the present invention.

FIG. 5 is an enlarged view of the area A in FIG. 4 .

FIG. 6 is a schematic view of the reverse side of the half-section electromagnetic coil core plate of the heat-resistant electromagnetic coil core plate of the heat-resistant electromagnetic heating plate of the present invention, which is a center section.

FIG. 7 is a process flow diagram of manufacturing a heat-resistant electromagnetic coil core board.

BEST MODE FOR CARRYING OUT THE INVENTION

Each part in the figure is marked: electromagnetic coil core plate 10, electromagnetic coil 11, core plate feed hole 12, core plate filtrate hole 13, half-cut core plate 14, groove 15, welding surface 16, liquid channel 171, vertical wall 172 , liquid collecting tank 173, underflow hole 174, underflow channel 175, settling area 170, fixing hole 18, heating plate 21, heating plate feeding hole 22, liquid outlet hole 23, filter cake frame 31, filter chamber 32, filter cake frame Filtrate hole 33, inner side surface 34 of filter cake frame.

O-O is the center line of the heat-resistant electromagnetic heating plate of the present invention, and also the center line of the electromagnetic coil core plate, the heating plate and the filter cake frame.

As shown in Figures 1 and 2, the structure of the heat-resistant electromagnetic heating plate of the present invention includes a heat-resistant electromagnetic coil core plate 10, and the two sides of the heat-resistant electromagnetic coil core plate 10 are sequentially covered with a heating plate 21 and a filter cake frame 31 in mirror images. Among them, the outer contour of the heating plate 21 is consistent with the settlement area 170 on the heat-resistant electromagnetic coil core plate 10 (see the inner area of the closed circle indicated by the arrow of the settlement area 170 in FIG. 4 ) and is assembled therein, and the heating plate feed hole 22 is consistent with the diameter of the core plate feed hole 12, and is sealed and connected to the periphery to form the feed hole 12 (22), and the filter cake frame filtrate hole 33 is consistent with the core plate filtrate hole 13. ), they can be connected together by bolts through the fixing holes 18, and the heat-resistant electromagnetic coil core plate 10 is sealed with the filter cake frame 31; the inner side 34 of the filter cake frame and the heating plate 21 are far away from the heat-resistant electromagnetic coil core plate 10 One side constitutes the filter chamber 32 . The electromagnetic coil core plate 10 is an integral rectangular plate, which is cut from the center plane to form two half-cut core plates 14 . groove 15. The heat-resistant electromagnetic coil plate 10 is a whole formed by heating and curing the heat-resistant composite material containing the electromagnetic coil 11 in the middle.

As shown in FIGS. 3 and 4 , the two sides of the heat-resistant electromagnetic coil plate 10 are mirrored with a plurality of liquid passage grooves 171 separated by vertical walls 172 . The liquid collecting tank 173 is provided with a communicating underflow hole 174, the underflow hole 174 is one end of the underflow channel 175, and the other end of the underflow channel 175 is connected to the filtrate hole 13 (33). The heating plate 21 is a stainless steel flat plate. The middle part of the heating plate 21 is covered with liquid outlet holes 23 (see the small dots in FIG. 3 ). The diameter of the liquid outlet hole 23 is 4-8 mm.

Embodiments of the present invention

As shown in FIG. 4 , the enlarged view of the area A in FIG. 4 is shown in FIG. 5 , the liquid passage groove 171 is a horizontal or vertical straight groove, the vertical wall 172 is a horizontal or vertical straight wall, and the width of the vertical wall 172 is c=10～12mm , the width of the liquid channel 171 is d=15-18mm.

As shown in Figures 1 to 6, the filter press object is from the feed port 12 (22) to the filter chamber 22 (the adjacent filter press plates in the filter press and the respective filter chambers of the heating plate are combined to form a large filter The pressure filter object enters the large filter chamber), the filter cake produced by the filter chamber 32, the liquid or its vapor generated by pressing or heating can enter the liquid passage 171 through the liquid outlet hole 23 of the heating plate 21, The liquid tank 171 flows into the liquid collecting tank 173 and enters the underflow channel 175 from the underflow hole 174 and then into the filtrate hole 13 (33).

The specific process method of manufacturing the heat-resistant electromagnetic coil core board is as follows:

As shown in Figures 1 to 4, the prefabricated upper molding die and lower molding die are mirror-symmetrical structures, both of which include: a core plate feed hole 12, a core plate filtrate hole 13, a liquid channel 171, a liquid collection tank 173, Underflow hole 174 and underflow channel 175 .

As shown in FIG. 7 , the three prefabricated molds include a lower molding mold, a middle molding mold, and an upper molding mold. The bottom end of the lower molding mold includes one side of the electromagnetic core board, and the top end of the upper molding mold includes the electromagnetic core. The structure of the other side of the board, the forming mold includes a groove for placing the coil path; the processing steps of the electromagnetic core board are: step 1, laying the required amount of resin composite proportioning material into the lower molding mold; step 2, The resin composite material is covered with a molding middle mold, and the surface including the grooves is the material contact surface; step 3, after applying pressure on the upper end of the molding middle mold for a certain period of time, take out the molding middle mold; step 4, according to the steps The coil laying is completed by the groove path pressed by the middle mold in the third molding process; in step 5, a sufficient amount of the material is added to the lower molding mold to cover the upper molding mold, and the pressure is increased on the upper molding mold, and the temperature is raised to a sufficient flow temperature of the material. Cool to normal temperature after maintaining a constant temperature for a limited time.

The constituent components of the resin composite material in the first step are: 94-96% of unsaturated resin, 1.0-3.4% of GF special yarn, and 2.6-3.0% of curing assistant.

In step 1, the required amount of material laying is the thickness after the material is fully melted: 22-28 mm.

In the second step, the grooves of the forming mold are formed in a spiral involute shape.

In step 3, the pressure applied to the middle mold is 400-450T.

The limited time in step 3 is 5-8 minutes.

In step 5, the temperature for the material to fully flow is 300-320°C.

The standard for adding sufficient material in step 5 is that the thickness of the material after cooling and forming is 40-50 mm.

In step 5, the pressure increase on the upper mold is 600T to 650T for 30 to 45 minutes.

Industrial Applicability

The heat-resistant electromagnetic heating plate of the present invention can be used for rapid heating and drying of compressed filter residues in the process of industrial pressing and filtration, and is especially suitable for use in filter presses in the environmental protection industry to heat filter cake sludge. Drying is very important.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the patent application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several replacements and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

A heat-resistant electromagnetic heating plate is characterized in that: it comprises a heat-resistant electromagnetic coil core plate and is covered with a heating plate and a filter cake frame in a mirror-symmetrical order on both sides of the core plate. The shape of the electromagnetic coil core plate and the filter cake frame is The outline is a square with the same size, the filter cake frame is a hollow frame structure, and the inner side of the filter cake frame is formed around the hollow frame; wherein, the outer contour of the heating plate is consistent with the shape of the settlement area on the electromagnetic coil core plate and is assembled on the Inside, the heating plate and the electromagnetic coil core plate are respectively provided with corresponding feeding holes in the vertical direction of their respective plate surfaces. Some filtrate holes are the same as the diameter of the filtrate holes provided on the electromagnetic coil core plate and are sealed and connected to the periphery; the electromagnetic coil core plate is sealed and connected to the periphery of the filter cake frame; the inner side of the filter cake frame and the heating plate are far away from the electromagnetic coil core. One side of the plate constitutes the filter chamber.
A heat-resistant electromagnetic heating plate according to claim 1, characterized in that: the filter cake frame is a square, and the filtrate holes are symmetrically arranged on the filter cake frame with the vertical centerline of the filter cake frame as the center. corner.
The heat-resistant electromagnetic heating plate according to claim 1, wherein the electromagnetic coil core plate is an integrated whole formed by heating and curing a heat-resistant composite material containing an electromagnetic coil in the middle.
A heat-resistant electromagnetic heating plate according to claim 3, wherein the settling area is provided on both sides of the electromagnetic coil core plate, and the contour is a concave area corresponding to the contour of the filter chamber.
A heat-resistant electromagnetic heating plate according to claim 4, characterized in that: the two outer sides of the electromagnetic coil core plate are provided with a plurality of liquid passage grooves separated by vertical walls, and both ends of all the liquid passage grooves are connected with each other. There are a plurality of underflow holes in the liquid collection tank, the underflow hole is one end of the underflow channel, and the other end of the underflow channel is connected to the filtrate port.
The heat-resistant electromagnetic heating plate according to claim 5, wherein the liquid passage groove is a horizontal or vertical straight groove, the vertical wall is a horizontal or vertical straight wall, and the width of the vertical wall is 8-12 mm , the width of the liquid tank is 15 ~ 18mm.
A heat-resistant electromagnetic heating plate according to claim 6, wherein the heating plate is a stainless steel flat plate.
The heat-resistant electromagnetic heating plate according to claim 7, wherein a plurality of liquid outlet holes are distributed on the heating plate.
The heat-resistant electromagnetic heating plate according to claim 8, wherein the diameter of the liquid outlet holes on the heating plate is 4-8 mm.
A heat-resistant electromagnetic heating plate according to any one of claims 1 to 9, wherein the filter cake formed in the filter chamber, the liquid or its steam generated by pressing or heating it passes through the outlet of the heating plate. The liquid hole enters the liquid channel, and flows from the liquid channel to the liquid collecting tank and enters the underflow channel from the underflow hole to the filtrate hole.