Feeding and separating device for powder and cooler for heat exchange of powder

Abstract

The utility model relates to a feed separating device for material powder and a cooler for material powder heat exchange, which comprises a shell and a sieve plate, the top of the shell is provided with a feed port, and the sieve plate is provided with a plurality of sieve holes; the sieve plate is in a plate shape and is obliquely arranged in the shell; the feeding port deviates from the middle position of the shell, and the distance between the projection, on the screen plate in the vertical direction, of the feeding port and the top end of the screen plate is smaller than the distance between the projection and the bottom end of the screen plate. According to the feeding and separating device, the possibility that a large amount of powder is accumulated at the lower end of the sieve plate is effectively reduced, so that the smooth and accurate feeding and separating process is ensured; the cooler disclosed by the utility model can be used for well cooling powder such as aluminum oxide and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a feed separation device for powder and a cooler for powder heat exchange, especially to a feed separation device for alumina powder and a cooler. BACKGROUND

[0002] In the metallurgical and chemical industry, the production of solid powder is often involved, and a cooler is often used to obtain solid powder with specific physical and chemical properties. For example, in the production of alumina in the aluminum metallurgy process, the calcined alumina needs to be cooled. Calcination is the last process in the production of alumina, and the main task of this process is to calcine aluminum hydroxide with attached water and crystal water at high temperature in a calcination furnace to remove the attached water and crystal water, thereby generating alumina products with required physical and chemical properties. The calcined alumina powder product needs to be cooled in time to facilitate subsequent packaging and ensure the safety of equipment and operating personnel.

[0003] Chinese invention patent CN106969630B specification discloses a kind of alumina calcination furnace vertical fluidized bed, including support, heat exchange unit and control system being arranged on support, heat exchange unit at least includes one heat exchange module, the heat exchange module is made of upper and lower parallelly arranged heat exchanger, the heat exchange pipe of adjacent heat exchanger is staggered arrangement, heat exchange unit upper portion is equipped with feeding unit, and its lower portion is equipped with discharge valve;Feeding unit includes feed casing and the distribution screen plate being arranged in feed casing, the upper end of feed casing is equipped with feed port, and its lower end is fixedly connected with the upper end of heat exchange unit, the cross section of distribution screen plate is inverted V, and its top end is located at the middle position of feed port, the lower end of both sides of distribution screen plate is fixedly connected with casing, and the slag removal port for cleaning the large particle slag on the distribution screen plate is arranged in the fixedly connected place, closed slag removal door is installed on slag removal port;Filtering plate is equipped below distribution screen plate, and the periphery side wall of filtering plate and distribution screen plate is fixed on the inner wall of feed casing. The vertical fluidized bed can realize the cooling of alumina powder flow, but the cross section of distribution screen plate of feeding unit is inverted V, and the top end of distribution screen plate is located at the middle position of feed port. When feeding, the alumina to be cooled first falls in the middle area of distribution screen plate, and then flows to both sides, which leads to that the movement distance of alumina powder flow above distribution screen plate is very limited, and part of alumina powder may not be screened in time, i.e. accumulated near slag removal port, which affects normal feeding and may lead to that feeding rate is difficult to be accurately controlled.

[0004] The specification of the previously applied Chinese utility model patent CN219103725U discloses an alumina particle cooler, which comprises a body with an inner cavity, the inner cavity is provided with a distributing mechanism, a plurality of heat exchange units and a discharging mechanism distributed in sequence from top to bottom, a feeding port is arranged on the top of the distributing mechanism and communicates with the inner cavity, a discharging port is arranged on the bottom of the discharging mechanism, the heat exchange unit comprises two oppositely arranged headers, a pipe row is communicated between the two headers, the headers and the pipe row are filled with cooling working medium, the pipe row comprises at least two rows of heat exchange pipes distributed upward and downward, a plurality of fins are arranged on the heat exchange pipes, and the plurality of fins are uniformly distributed along the length direction of the heat exchange pipes. The distributing mechanism comprises an outer shell and a conical distributing sieve plate distributed upward and downward, the feeding port is arranged on the outer shell, the feeding port and the conical distributing sieve plate share a common central axis, and the conical distributing sieve plate is gradually inclined downward from the central axis outward; a plurality of vibration devices are arranged on the outer shell, and the output ends of the vibration devices abut against the conical distributing sieve plate. In the technology, the conical distributing sieve plate and the feeding port share a common central axis, and the problem of powder accumulation is prone to occur; moreover, the powder often contains refractory lining materials dropped from the roasting furnace, and the part of the materials is accumulated on the bottom side of the conical distributing sieve plate, so that the powder distribution stroke which is already short is further limited, and then the normal feeding process is affected. Utility model content

[0005] In view of the defects of the prior art, one of the purposes of the utility model is to provide a feeding and separating device for powder, so as to solve the problem that the powder feeding and separating device is prone to powder accumulation; and the second purpose of the utility model is to provide a cooler for powder heat exchange.

[0006] The technical scheme adopted by the utility model is as follows:

[0007] The feeding and separating device for powder comprises a shell and a sieve plate, a feeding port is arranged on the top of the shell, a plurality of sieve holes are arranged on the sieve plate, the sieve plate is plate-shaped and is arranged in the shell in an inclined manner, the feeding port deviates from the middle position of the shell, the distance between the projection of the feeding port on the sieve plate in the vertical direction and the top end of the sieve plate is smaller than the distance between the projection and the bottom end of the sieve plate.

[0008] According to the technical scheme, the sieve plate is plate-shaped, the feed inlet deviates from the middle position of the shell, and the position of the feed inlet is closer to the upper end of the sieve plate. Thus, after the material powder to be treated enters the feed separation device from the feed inlet, the falling point of the material powder on the sieve plate is located close to the upper end of the sieve plate, so that the material powder has a longer rolling distance on the sieve plate. Thus, the impurities (such as the refractory lining of the upstream side equipment such as a roasting furnace) that are larger than the sieve hole are left above the lower end of the sieve plate, and the target material powder is basically sieved out, thereby effectively reducing the possibility of a large amount of material powder accumulated at the lower end of the sieve plate, and further ensuring smooth and accurate operation of the feed separation process. In addition, when the material powder falls on the sieve plate, some of the material powder is inevitably bounced or raised due to the influence of the back impact. Since the material powder has a longer rolling distance from the bottom end of the sieve plate, the fine material powder in the part of the material powder still has enough opportunity to be further sieved out, thereby reducing the risk of accumulation.

[0009] Further, the included angle between the sieve plate and the horizontal plane is 10-75°, more further 15-70°, further 20-60°, preferably 30-45°. By controlling the appropriate inclination angle, the screening effect can be further improved.

[0010] Further, the shell is provided with a slag outlet, the slag outlet is arranged at the position where the bottom end of the sieve plate is connected with the shell, and is in communication with the space above the sieve plate in the shell. In this way, the large slag on the sieve plate can be conveniently and timely discharged, thereby ensuring the continuous and smooth operation of the feed separation device.

[0011] Further, the slag outlet is communicated with a slag outlet pipe, so that the large slag can be conveniently and directly guided to the target position for further processing.

[0012] Further, the slag outlet is provided with an openable and closable slag removal door.

[0013] Further, the top end of the sieve plate and the feed inlet are located on the same side of the central axis of the shell.

[0014] Further, the top side of the shell is provided with an inspection hole. In this way, the inspection hole can be used for convenient inspection and cleaning of some oversized slag.

[0015] Further, the shell comprises a first shell segment, a second shell segment and a third shell segment connected in sequence from bottom to top, the cross sections of the second shell segment and the third shell segment in the horizontal direction gradually increase from top to bottom, the feed inlet is arranged in the third shell segment, and the sieve plate is arranged in the second shell segment. In this way, the feed inlet can be further connected and matched with the upstream equipment, and the feed separation device can be conveniently connected with the downstream equipment.

[0016] Based on the same inventive concept, the application also provides a cooler for powder heat exchange, comprising a plurality of heat exchange modules arranged in sequence from top to bottom, wherein each heat exchange module comprises a body with an inner cavity, a plurality of heat exchange pipes arranged in staggered rows are arranged in the inner cavity, and a connecting flange interface is arranged at the top and bottom of each heat exchange module; the top of the uppermost heat exchange module is provided with the feed separation device as described above, and the space below the screen plate is communicated with the inner cavity of the heat exchange module through an opening; and the bottom of the lowermost heat exchange module is provided with a discharge unit.

[0017] Therefore, the feed separation device screens the powder to be cooled, and after removing the large slag, the screened powder enters each heat exchange module under the action of gravity and is cooled.

[0018] In addition, the heat exchange modules can be connected through the connecting flange interfaces to form a heat exchange unit, so that the number of heat exchange modules can be adjusted as needed to obtain the target cooling effect and improve the applicability of the cooler. Preferably, flanges protruding outward are arranged on the top and bottom surfaces of the body to facilitate the connection between adjacent heat exchange modules.

[0019] Further, a discharge valve is arranged between the discharge unit and the lowermost heat exchange module, the discharge valve comprises a valve body, a first valve plate fixed in the valve body, a second valve plate movable relative to the first valve plate, and a driving mechanism in transmission connection with the second valve plate, the first valve plate and the second valve plate are both parallel to the horizontal plane, the driving mechanism is fixed on the valve body, a plurality of first waist-shaped holes are arranged on the first valve plate, and a plurality of second waist-shaped holes matched with the first waist-shaped holes are arranged on the second valve plate. Therefore, the driving mechanism can drive the second valve plate to move relative to the first valve plate, thereby controlling the coincidence degree between the first waist-shaped holes and the second waist-shaped holes to control the discharge speed, so that the material level in the cooler can be maintained, and the contact or residence time of the powder with the heat exchange unit can be controlled to obtain the target cooling effect.

[0020] Further, the driving mechanism is a linear driving mechanism, and the length direction of the waist-shaped hole is consistent with the moving direction of the second valve plate. Therefore, the discharge speed can be more accurately controlled.

[0021] Compared with the prior art, the application has the following advantages:

[0022] (1) The feed separation device of the application effectively reduces the possibility of a large amount of powder accumulating at the lower end of the screen plate, thereby ensuring smooth and accurate feeding separation process. Compared with the conical and V-shaped screen plates of the prior art such as CN106969630B and CN219103725U, the rolling distance of the powder on the screen plate in the feed separation device of the application is longer under the same size, the screening effect is better, and the risk of accumulation is lower.

[0023] (2) The feeding separation device of the utility model adopts a plate-shaped sieve plate, which is simpler in structure than the conical or V-shaped sieve plate of the prior art such as CN106969630B and CN219103725U, and helps to reduce the cost of equipment.

[0024] (3) The feeding separation device of the utility model only needs to be provided with a slag outlet at the bottom end of the sieve plate, while the prior art such as CN106969630B and CN219103725U needs to be provided with slag outlet ports and related pipelines on multiple sides, so that the feeding separation device of the utility model is simpler in structure and easier to maintain.

[0025] (4) The heat exchange modules of the cooler of the utility model are modularized, which facilitates transportation and assembly, and can be assembled as required, and helps to improve the applicable scenarios of the cooler. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a feeding separation device for alumina powder.

[0027] Figure 2 It is a structural diagram of a cooler for heat exchange of alumina powder.

[0028] Figure 3 It is a top view of a discharge valve.

[0029] Figure 4 It is an internal structure view of a discharge valve.

[0030] Figure 5 It is a structural diagram of a heat exchange module. DETAILED DESCRIPTION

[0031] The utility model will be described in detail below with reference to the drawings and in combination with embodiments. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict. For the sake of description, if the words "up", "down", "left", "right" appear in the following text, they only mean the same direction as the up, down, left and right of the drawings, and do not limit the structure.

[0032] Referring to Figure 1The application discloses a feeding and separating device for alumina powder, which comprises a shell 1 and a sieve plate 3, the top of the shell 1 is provided with a feeding port 2, and the sieve plate 3 is provided with a plurality of sieve holes which are uniformly distributed; the sieve plate 3 is plate-shaped and is arranged in the shell 1 in an inclined manner; the feeding port 2 deviates from the middle position of the shell 1, the distance between the projection of the feeding port 2 on the sieve plate 3 in the vertical direction and the top end of the sieve plate 3 is smaller than the distance between the projection and the bottom end of the sieve plate 3, and the top end of the sieve plate and the feeding port are located on the same side of the central axis of the shell; the included angle between the sieve plate 3 and the horizontal plane is 30 degrees; and a plurality of reinforcing plates are fixed below the sieve plate 3 and are arranged in the vertical direction.

[0033] The shell 1 is provided with a slag outlet, the slag outlet is arranged at the position where the bottom end of the sieve plate 3 is connected with the shell 1 and is in communication with the space above the sieve plate 3 in the shell 1; a slag outlet pipe 5 is in communication with the slag outlet; the slag outlet is provided with an openable and closable slag removal door; and the top side of the shell 1 is provided with an inspection hole 6.

[0034] The shell 1 comprises a first shell section 101, a second shell section 102 and a third shell section 103 which are sequentially connected from bottom to top, the cross sections of the second shell section 102 and the third shell section 103 in the horizontal direction gradually increase from top to bottom, the feeding port 2 is arranged in the third shell section 103, and the sieve plate 3 is arranged in the second shell section 102; the first shell section 101 is in the shape of a regular quadrangular prism; the feeding port 2 deviates from the central axis of the shell 1, and the projection of the feeding port 2 on the sieve plate 3 in the vertical direction deviates from the central axis of the shell 1; the shell 1 is further provided with a material level meter pipe seat 11 and a material level meter interface 8, a frequency-modulated continuous wave radar material level meter can be arranged in the material level meter pipe seat 11, is responsible for monitoring the high and low material levels, and can be linked with a discharge valve through an additional control system to realize material level control; and a material level switch can be arranged in the material level meter interface 8 and is responsible for assisting high and low material level alarm.

[0035] Referring to Figure 2, the cooler for powder heat exchange, comprising a rack 13 and a plurality of heat exchange modules 8 arranged in sequence from top to bottom, the heat exchange modules are fixed on the rack 13, the heat exchange module comprises a body 800 with an inner cavity, a plurality of rows of staggered heat exchange pipes are arranged in the inner cavity, the top and bottom of the heat exchange module 8 are respectively provided with a connecting flange interface 801; the top of the uppermost heat exchange module 8 is provided with the feed separation device as described above, the space below the sieve plate 3 is communicated with the inner cavity of the heat exchange module 8 through the opening; the bottom of the lowermost heat exchange module 8 is provided with a discharge unit 9. Optionally, the heat exchange module comprises an inlet header 802, an outlet header 803, a plurality of rows of upper and lower staggered heat exchange pipes 804, the upper and lower adjacent heat exchange pipes are connected end to end through the elbow pipe 805, the uppermost heat exchange pipe is communicated with the outlet header, the lowermost heat exchange pipe is communicated with the inlet header; when the upper and lower adjacent heat exchange modules need to be communicated, the related headers can be communicated; alternatively, the specific structure of the heat exchange module and the connection relationship therebetween can also be arranged as in CN219103725U.

[0036] Referring to Figure 3 and Figure 4 , the discharge unit 9 and the lowermost heat exchange module 8 are provided with a discharge valve 10, the discharge valve 10 comprises a valve body 7, a first valve plate 1001 fixed in the valve body 7, a second valve plate 1002 movable relative to the first valve plate 1001 and a driving mechanism 1003 in transmission connection with the second valve plate 1002, the first valve plate 1001 and the second valve plate 1002 are both parallel to the horizontal plane, the driving mechanism 1003 is fixed on the valve body, a plurality of first waist-shaped holes are arranged on the first valve plate 1001, and a plurality of second waist-shaped holes matched with the first waist-shaped holes are arranged on the second valve plate 1002. The driving mechanism 1003 is a linear driving mechanism; the length direction of the waist-shaped hole is consistent with the moving direction of the second valve plate 1002.

[0037] The content illustrated in the above embodiments should be understood as that the embodiments are only used for more clearly illustrating the utility model, and are not used for limiting the scope of the utility model, after reading the utility model, the modification of various equivalent forms of the utility model by the person skilled in the art all fall within the scope defined by the appended claims of the application.

Claims

1. A feeding and separating device for powder material, comprising a housing (1) and a sieve plate (3), the top of the housing (1) is provided with a feeding port (2), and the sieve plate (3) is provided with a plurality of sieve holes; characterized in that, The screen plate (3) is plate-shaped and is arranged obliquely in the shell (1); the feed inlet (2) is deviated from the middle position of the shell (1), and the distance between the projection of the feed inlet (2) on the screen plate (3) in the vertical direction and the top end of the screen plate (3) is less than the distance between the projection and the bottom end of the screen plate (3).

2. The feed separation device of claim 1, wherein, The included angle between the screen plate (3) and the horizontal plane is 10-75°.

3. The feed separation device of claim 1, wherein, The shell (1) is provided with a slag outlet, which is arranged at the position where the bottom end of the screen plate (3) is connected with the shell (1) and is in communication with the space above the screen plate (3) in the shell (1).

4. The feed separation device of claim 3, wherein, The slag outlet is communicated with a slag outlet pipe (5).

5. The feed separation device according to claim 3 or 4, characterized in that The slag outlet is provided with an openable slag removal door.

6. The feed separation device according to any one of claims 1-4, characterized in that The top end of the screen plate (3) and the feed inlet (2) are located on the same side of the central axis of the shell (1).

7. The feed separation device according to any one of claims 1-4, characterized in that The shell (1) comprises a first shell section (101), a second shell section (102) and a third shell section (103) connected in sequence from bottom to top, the cross sections of the second shell section (102) and the third shell section (103) in the horizontal direction gradually increase from top to bottom, the feed inlet (2) is arranged in the third shell section (103), and the screen plate (3) is arranged in the second shell section (102).

8. A cooler for powder heat exchange, comprising a plurality of heat exchange modules (8) arranged in sequence from top to bottom, the heat exchange module comprising a body (800) having an inner cavity, a plurality of heat exchange tubes arranged in staggered rows being arranged in the inner cavity, the top and bottom of the heat exchange module (8) being respectively provided with a connecting flange interface; characterized in that, The top of the uppermost heat exchange module (8) is provided with the feed separation device as claimed in any one of claims 1-7, and the space below the screen plate (3) is in communication with the inner cavity of the heat exchange module (8); the bottom of the lowermost heat exchange module (8) is provided with a discharging unit (9).

9. The cooler of claim 8, wherein, A discharging valve (10) is arranged between the discharging unit (9) and the lowermost heat exchange module (8), the discharging valve (10) comprises a valve body (7), a first valve plate (1001) fixed in the valve body (7), a second valve plate (1002) movable relative to the first valve plate (1001), and a driving mechanism (1003) in transmission connection with the second valve plate (1002), the first valve plate (1001) and the second valve plate (1002) are parallel to the horizontal plane, the driving mechanism (1003) is fixed on the valve body (7), a plurality of first waist-shaped holes are arranged on the first valve plate (1001), and a plurality of second waist-shaped holes matched with the first waist-shaped holes are arranged on the second valve plate (1002).

10. The cooler of claim 9, wherein, The driving mechanism (1003) is a linear driving mechanism; and the length direction of the waist-shaped hole is consistent with the moving direction of the second valve plate (1002). The driving mechanism (1003) is a linear driving mechanism; and the length direction of the waist-shaped hole is consistent with the moving direction of the second valve plate (1002).

Images