Adjustable external circulation evaporation preheater flow guide device

Abstract

The utility model relates to preheater flow guide device technical field discloses an adjustable external circulation evaporation preheater flow guide device, including preheater, the inner wall fixed connection of preheater has steam import, the inner wall fixed connection of preheater has steam export, the bottom fixed connection of preheater has raw material import, the top fixed connection of preheater has raw material export, the left -hand member of raw material export is provided with evaporimeter, the surface of evaporimeter is provided with angle adjusting mechanism. The utility model discloses through setting the pole and sliding slot, motor drive gear drives rack to slide on the inner wall of sliding slot, makes the pole slide in the adjusting groove of flow guide plate, drives flow guide plate to rotate in the inner wall of evaporimeter and changes the flow angle, will high -speed steam -liquid mixture accurate orientation separation area, effectively breaks vortex, promotes steam -liquid separation, through setting the defoaming net, the defoaming net that sets below flow guide plate captures gas entrainment's liquid froth, avoids the running phenomenon, guarantees product quality and yield.

Description

Technical Field

[0001] This utility model relates to the technical field of preheater flow guiding devices, and in particular to an adjustable external circulation evaporation preheater flow guiding device. Background Technology

[0002] The working principle of an evaporator is to heat a solution containing non-volatile solutes to boiling point, causing some of the solvent to vaporize and be removed, thereby increasing the solute concentration in the solvent. Double-effect external circulation evaporators are widely used in the pharmaceutical, food, chemical, and light industries for the evaporation and concentration of water or organic solvent solutions, especially suitable for heat-sensitive materials in these industries, for low-temperature continuous concentration under vacuum conditions.

[0003] In existing external circulation evaporator preheaters, the internal flow channels are fixed during use. When the flow rate changes significantly, vaporized steam tends to accumulate, which reduces the gas-liquid separation effect in the evaporator and lowers the evaporation efficiency. At the same time, the connecting pipe is directly connected to the separator, and the heated vaporized liquid steam enters the separator without obstruction. When the pressure is high, the steam tends to form a strong vortex at the inlet, resulting in insufficient gas-liquid separation. When the pressure is low, the steam cannot be fully distributed inside the evaporator, resulting in flow dead zones or stagnation inside the evaporator. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an adjustable external circulation evaporator preheater flow guiding device.

[0005] This utility model is achieved using the following technical solution: an adjustable external circulation evaporator preheater flow guiding device, comprising a preheater, a steam inlet fixedly connected to the inner wall of the preheater, a steam outlet fixedly connected to the inner wall of the preheater, a raw material inlet fixedly connected to the bottom of the preheater, a raw material outlet fixedly connected to the top of the preheater, an evaporator provided at the left end of the raw material outlet, an angle adjustment mechanism provided on the surface of the evaporator, an output adjustment mechanism provided on the inner wall of the evaporator, a circulation pipe fixedly connected to the bottom of the evaporator, and a circulation inlet fixedly connected to the bottom of the preheater; The angle adjustment mechanism includes a fixed block, a motor fixedly connected to the top of the fixed block, a gear fixedly connected to the output end of the motor, a rack meshing with the teeth of the gear, a lever fixedly connected to the surface of the rack, a sliding groove on the inner wall of the evaporator, a guide plate rotatably connected to the inner wall of the evaporator, an adjustment groove on the end of the guide plate near the sliding groove, and a defoaming screen fixedly connected to the inner wall of the evaporator.

[0006] The above technical solution involves setting up a demister screen below the guide plate to capture liquid droplets entrained by the gas, thus preventing material loss and ensuring product quality and yield.

[0007] As a further improvement to the above solution, the surface of the fixing block is fixedly connected to the surface of the evaporator, and the surface of the gear is rotatably connected to the inner wall of the evaporator.

[0008] As a further improvement to the above solution, the surface of the rack is slidably connected to the inner wall of the slide groove, and the surface of the lever is slidably connected to the inner wall of the adjustment groove.

[0009] Through the above technical solution, by setting up a lever and a slide groove, the motor drives the gear to drive the rack to slide up and down on the inner wall of the slide groove, so that the lever slides in the adjustment groove of the guide plate, driving the guide plate to rotate on the inner wall of the evaporator to change the guiding angle, and accurately guide the high-speed vapor-liquid mixture to the separation area, effectively breaking the eddy current and promoting vapor-liquid separation.

[0010] As a further improvement to the above solution, the output adjustment mechanism includes a screw, a handwheel is fixedly connected to the end of the screw away from the evaporator, a flow guide block is fixedly connected to the end of the screw away from the handwheel, a flow guide tube is fixedly connected to the inner wall of the evaporator, and a fixing frame is fixedly connected to the inner wall of the evaporator.

[0011] As a further improvement to the above solution, the surface of the screw is fixedly connected to the inner wall of the evaporator, the end of the guide tube away from the evaporator is fixedly connected to the end of the raw material outlet away from the preheater, and the surface of the screw is rotatably connected to the inner wall of the fixed frame.

[0012] As a further improvement to the above solution, the inclination angle of the inner wall of the guide tube is consistent with the surface inclination angle of the guide core block.

[0013] By using the above technical solution, by setting up a flow guide block and a flow guide tube, rotating the handwheel causes the screw to drive the flow guide block to move axially, changing the width of the annular gap between it and the flow guide tube, controlling the feed rate and feed speed of the raw material steam, avoiding local stagnation of the raw material at the evaporator inlet or the formation of a low-speed zone, and making the raw material evenly distributed inside the evaporator, thereby preventing the deposition and scaling of solid matter.

[0014] As a further improvement to the above scheme, the end of the circulation pipe away from the evaporator is fixedly connected to the end of the circulation inlet away from the preheater.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention utilizes an angle adjustment mechanism, specifically a lever and a sliding groove. A motor-driven gear causes a rack to slide up and down on the inner wall of the sliding groove, allowing the lever to slide within the adjustment groove of the guide plate. This causes the guide plate to rotate on the inner wall of the evaporator, changing the flow angle and precisely guiding the high-speed vapor-liquid mixture to the separation area. This effectively breaks up eddies and promotes vapor-liquid separation. Furthermore, a demister screen positioned below the guide plate captures liquid droplets entrained by the gas, preventing material loss and ensuring product quality and yield.

[0016] This invention features an output adjustment mechanism, specifically a guide core block and a guide tube. By rotating the handwheel, the screw drives the guide core block to move axially, changing the width of the annular gap between the guide core block and the guide tube. This controls the feed rate and speed of the raw material steam, preventing the raw material from stagnating or forming a low-speed zone at the evaporator inlet. The raw material is then evenly distributed inside the evaporator, thus preventing the deposition and scaling of solid matter. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the present invention. Figure 3 This is a schematic diagram of the exploded structure of this utility model; Figure 4 This is a schematic diagram of the cross-sectional structure of the evaporator of this utility model; Figure 5 This is a cross-sectional structural diagram of the adjustment mechanism of this utility model.

[0018] Explanation of key symbols: 1. Preheater; 2. Steam inlet; 3. Steam outlet; 4. Raw material inlet; 5. Raw material outlet; 6. Evaporator; 7. Angle adjustment mechanism; 701. Fixing block; 702. Motor; 703. Gear; 704. Rack; 705. Lever; 706. Slide groove; 707. Guide plate; 708. Adjustment groove; 709. Demister screen; 8. Output adjustment mechanism; 801. Screw; 802. Handwheel; 803. Guide core block; 804. Guide pipe; 805. Fixing frame; 9. Circulation pipe; 10. Circulation inlet; 11. Evaporation outlet; 12. Array heat exchange tube. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0020] Example: Please combine Figure 1-5An adjustable external circulation evaporator preheater flow guiding device according to this embodiment includes a preheater 1, a steam inlet 2 fixedly connected to the inner wall of the preheater 1, a steam outlet 3 fixedly connected to the inner wall of the preheater 1, a raw material inlet 4 fixedly connected to the bottom of the preheater 1, a raw material outlet 5 fixedly connected to the top of the preheater 1, an evaporator 6 provided at the left end of the raw material outlet 5, an angle adjustment mechanism 7 provided on the surface of the evaporator 6, an output adjustment mechanism 8 provided on the inner wall of the evaporator 6, a circulation pipe 9 fixedly connected to the bottom of the evaporator 6, and a circulation inlet 10 fixedly connected to the bottom of the preheater 1. The angle adjustment mechanism 7 includes a fixed block 701, a motor 702 fixedly connected to the top of the fixed block 701, a gear 703 fixedly connected to the output end of the motor 702, a rack 704 meshing with the tooth surface of the gear 703, a lever 705 fixedly connected to the surface of the rack 704, a sliding groove 706 provided on the inner wall of the evaporator 6, a guide plate 707 rotatably connected to the inner wall of the evaporator 6, an adjustment groove 708 provided at one end of the guide plate 707 near the sliding groove 706, and a demister 709 fixedly connected to the inner wall of the evaporator 6 to capture liquid droplets entrained by the gas, avoid material leakage, and ensure product quality and yield.

[0021] The surface of the fixed block 701 is fixedly connected to the surface of the evaporator 6, and the surface of the gear 703 is rotatably connected to the inner wall of the evaporator 6.

[0022] The surface of the rack 704 is slidably connected to the inner wall of the slide groove 706, and the surface of the lever 705 is slidably connected to the inner wall of the adjustment groove 708. The motor 702 drives the gear 703 to drive the rack 704 to slide up and down on the inner wall of the slide groove 706, so that the lever 705 slides in the adjustment groove 708 of the guide plate 707, which drives the guide plate 707 to rotate on the inner wall of the evaporator 6 to change the guide angle, so as to accurately guide the high-speed vapor-liquid mixture to the separation area, effectively breaking the eddy current and promoting vapor-liquid separation.

[0023] The output adjustment mechanism 8 includes a screw 801, a handwheel 802 fixedly connected to the end of the screw 801 away from the evaporator 6, a flow guide block 803 fixedly connected to the end of the screw 801 away from the handwheel 802, a flow guide pipe 804 fixedly connected to the inner wall of the evaporator 6, and a fixing bracket 805 fixedly connected to the inner wall of the evaporator 6.

[0024] The surface of the screw 801 is fixedly connected to the inner wall of the evaporator 6, the end of the guide pipe 804 away from the evaporator 6 is fixedly connected to the end of the raw material outlet 5 away from the preheater 1, and the surface of the screw 801 is rotatably connected to the inner wall of the fixed frame 805.

[0025] The inclination angle of the inner wall of the guide tube 804 is consistent with the inclination angle of the surface of the guide core block 803. Rotating the handwheel 802 causes the screw 801 to drive the guide core block 803 to move axially, changing the width of the annular gap between it and the guide tube 804, controlling the feed rate and feed speed of the raw material steam, avoiding local stagnation of the raw material at the evaporator inlet or the formation of a low-speed zone, so that the raw material is evenly distributed inside the evaporator 6, thereby preventing solid matter from depositing and scaling.

[0026] The end of the circulation pipe 9 furthest from the evaporator 6 is fixedly connected to the end of the circulation inlet 10 furthest from the preheater 1.

[0027] The implementation principle of the adjustable external circulation evaporator preheater guide device in this application embodiment is as follows: During use, raw materials are fed in through the raw material inlet 4, high-temperature steam is input through the steam inlet 2, and the steam after heat exchange is output through the steam outlet 3. The heated and evaporated raw materials enter the guide pipe 804 through the raw material outlet 5. Rotating the handwheel 802 causes the screw 801 to drive the guide core block 803 axially, changing the width of the annular gap between it and the guide pipe 804, thus controlling the feed rate and speed of the raw material steam. This prevents the raw material from stagnating locally at the evaporator inlet or creating a low-speed zone, ensuring the raw material is evenly distributed throughout the evaporator. Inside the evaporator 6, a demister 709 located below the guide plate 707 captures liquid droplets entrained by the gas, preventing material leakage. After the demisting raw material steam passes through the demister 709, the motor 702 drives the gear 703 to drive the rack 704 to slide up and down on the inner wall of the slide groove 706, causing the lever 705 to slide in the adjustment groove 708 of the guide plate 707, which in turn drives the guide plate 707 to rotate on the inner wall of the evaporator 6, changing the guiding angle and precisely guiding the high-speed vapor-liquid mixture to the separation area. The separated raw material liquid enters the preheater 1 through the circulation pipe 9 from the circulation inlet 10 for re-evaporation.

[0028] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. An adjustable external circulation evaporator preheater flow guiding device, characterized in that, The device includes a preheater (1), with a steam inlet (2) fixedly connected to the inner wall of the preheater (1), a steam outlet (3) fixedly connected to the inner wall of the preheater (1), a raw material inlet (4) fixedly connected to the bottom of the preheater (1), a raw material outlet (5) fixedly connected to the top of the preheater (1), an evaporator (6) provided at the left end of the raw material outlet (5), an angle adjustment mechanism (7) provided on the surface of the evaporator (6), an output adjustment mechanism (8) provided on the inner wall of the evaporator (6), a circulation pipe (9) fixedly connected to the bottom of the evaporator (6), and a circulation inlet (10) fixedly connected to the bottom of the preheater (1). The angle adjustment mechanism (7) includes a fixed block (701), a motor (702) is fixedly connected to the top of the fixed block (701), a gear (703) is fixedly connected to the output end of the motor (702), a rack (704) meshes with the tooth surface of the gear (703), a lever (705) is fixedly connected to the surface of the rack (704), a sliding groove (706) is provided on the inner wall of the evaporator (6), a guide plate (707) is rotatably connected to the inner wall of the evaporator (6), an adjustment groove (708) is provided at one end of the guide plate (707) near the sliding groove (706), and a defoaming screen (709) is fixedly connected to the inner wall of the evaporator (6).

2. The adjustable external circulation evaporator preheater flow guiding device as described in claim 1, characterized in that: The surface of the fixed block (701) is fixedly connected to the surface of the evaporator (6), and the surface of the gear (703) is rotatably connected to the inner wall of the evaporator (6).

3. The adjustable external circulation evaporator preheater flow guiding device as described in claim 1, characterized in that: The surface of the rack (704) is slidably connected to the inner wall of the slide groove (706), and the surface of the lever (705) is slidably connected to the inner wall of the adjustment groove (708).

4. The adjustable external circulation evaporator preheater flow guiding device as described in claim 1, characterized in that: The output adjustment mechanism (8) includes a screw (801), a handwheel (802) is fixedly connected to one end of the screw (801) away from the evaporator (6), a flow guide block (803) is fixedly connected to one end of the screw (801) away from the handwheel (802), a flow guide pipe (804) is fixedly connected to the inner wall of the evaporator (6), and a fixing frame (805) is fixedly connected to the inner wall of the evaporator (6).

5. The adjustable external circulation evaporator preheater flow guiding device as described in claim 4, characterized in that: The surface of the screw (801) is fixedly connected to the inner wall of the evaporator (6), the end of the guide pipe (804) away from the evaporator (6) is fixedly connected to the end of the raw material outlet (5) away from the preheater (1), and the surface of the screw (801) is rotatably connected to the inner wall of the fixing frame (805).

6. The adjustable external circulation evaporator preheater flow guiding device as described in claim 4, characterized in that: The inclination angle of the inner wall of the guide tube (804) is consistent with the inclination angle of the surface of the guide core block (803).

7. The adjustable external circulation evaporator preheater flow guiding device as described in claim 1, characterized in that: The end of the circulation pipe (9) away from the evaporator (6) is fixedly connected to the end of the circulation inlet (10) away from the preheater (1).

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