A self-cleaning evaporation device

Abstract

This invention relates to the field of evaporation technology, and particularly to a self-cleaning evaporation device. The self-cleaning evaporation device provided by this invention includes an evaporation chamber, a gas-liquid separation chamber, a hot air inlet, a saturated air outlet, a liquid distribution plate, a pulse controller, and a high-pressure air inlet. The gas-liquid separation chamber contains a gas-liquid separation plate located at the top of the evaporation device and connected to the saturated air outlet. The evaporation chamber is located in the middle of the evaporation device and connected to the hot air inlet. Inside the evaporation chamber are parallel liquid distribution plates, with a liquid distribution groove at the top of each plate, and distribution holes in the groove. The liquid distribution plates are hollow, double-sided perforated plates with a sandwich structure; the perforations on the liquid distribution plates are self-cleaning air holes. The pulse controller is connected to the liquid distribution plates, and high-pressure air is introduced into the sandwich structure of the liquid distribution plates through the high-pressure air inlet via the pulse controller, and then blown out through the self-cleaning air holes to remove scale from the surface of the liquid distribution plates. The self-cleaning function can be achieved by periodically activating the pulse controller.

Description

Technical Field

[0001] This invention relates to the field of evaporation technology, and in particular to a self-cleaning evaporation device. Background Technology

[0002] Evaporation can be categorized into three types: pressurized evaporation, atmospheric pressure evaporation, and reduced pressure evaporation. Evaporators are widely used in the food, pharmaceutical, chemical, and industrial wastewater treatment industries. Currently, commonly used evaporator types include external circulation evaporators, forced circulation evaporators, falling film evaporators, plate evaporators, and MVR evaporators.

[0003] External circulation evaporators are suitable for evaporating materials with high heat resistance, high viscosity, and a tendency to scale and coke. They feature high heating temperatures and large heat transfer temperature differences, resulting in a relatively small heat transfer area. However, external circulation evaporators are prone to mist entrainment and even material loss, requiring sufficient separation volume in the separation chamber, thus limiting their use. Forced circulation evaporators are suitable for materials prone to scaling and coking, and even those that precipitate crystals during evaporation. They can be used independently or in combination with other types of evaporators. Their drawback is the high heating temperature of the primary steam, limiting the heating area design, and their space requirement is second only to falling film evaporators. Falling film evaporators are low-temperature evaporators, allowing for continuous feeding and discharging, and offer fast evaporation rates. They are suitable for both heat-sensitive and non-heat-sensitive materials, but they require a large space, have high initial investment costs, and are more complex to design, requiring material and heat balance calculations to determine the evaporator's heat exchange area, preheating area, and related components. Their structural types vary considerably. The biggest advantage of plate evaporators is their small size and space-saving design. They operate at low temperatures. However, their disadvantages include the evaporator gaskets being prone to aging and leaks, incomplete cleaning, and limited flexibility in plate shape selection due to manufacturing constraints. MVR evaporators have become increasingly popular in industrial wastewater treatment in recent years. They utilize a steam compressor to compress all secondary steam into superheated steam, which is then converted into higher-temperature saturated steam as a heat source, resulting in significant energy savings. However, they also suffer from problems such as insufficient production capacity, unstable evaporation parameters, severe scaling and coking, and poor evaporation efficiency. Summary of the Invention

[0004] To overcome the problems of severe scaling and coking, and poor evaporation efficiency in existing evaporation equipment, this invention provides a self-cleaning evaporation device, comprising an evaporation chamber, a gas-liquid separation chamber, a hot air inlet, a saturated air outlet, a liquid distribution plate, a pulse controller, and a high-pressure air inlet. The gas-liquid separation chamber contains a gas-liquid separation plate located at the top of the evaporation device and connected to the saturated air outlet. The evaporation chamber is located in the middle of the evaporation device and connected to the hot air inlet. Inside the evaporation chamber are parallel liquid distribution plates, with a liquid distribution groove at the top of each plate, and distribution holes in the groove. The liquid distribution plates are hollow, double-sided perforated plates with a sandwich structure, and the perforations on the plates are self-cleaning air vents. The pulse controller is connected to the liquid distribution plates, and high-pressure air is introduced into the sandwich structure of the liquid distribution plates through the high-pressure air inlet via the pulse controller, and then blown out through the self-cleaning air vents to remove scale from the surface of the liquid distribution plates. The self-cleaning function can be achieved by periodically activating the pulse controller.

[0005] Specifically, the evaporator is a cylindrical container.

[0006] Specifically, the surface of the liquid distribution plate is coated with an anti-stick coating to prevent scale buildup.

[0007] Specifically, the liquid distribution tank is designed with a large upper diameter and a small lower diameter.

[0008] Specifically, the gas-liquid separation plate is designed to fit the gas-liquid separation chamber, and the gas and liquid entrained in the mist are separated between the gas-liquid separation plates.

[0009] Specifically, the saturated air outlet is located at the top of the evaporator; the hot air inlet is located at the bottom of the evaporator.

[0010] Furthermore, it also includes a spray pipe 54, and a liquid distribution tank 51 connected to the spray pipe 54.

[0011] Meanwhile, the self-cleaning evaporation equipment provided by this invention can be widely used in various fields such as chemical, food, medicine, papermaking, textile, machinery manufacturing, and environmental protection where drying, evaporation, concentration, and solution separation are required.

[0012] The self-cleaning evaporation equipment provided by this invention eliminates common components such as "evaporation tubes", "evaporation plates", and "falling films", replacing them with a "liquid distribution plate" that can achieve self-cleaning function, which greatly increases the evaporation area and efficiency; it transforms the internal power of the system previously consumed by the "evaporation tubes" into energy that directly acts on the solution, improving energy utilization efficiency, which is conducive to energy conservation and emission reduction, and is suitable for large-scale evaporation. Attached Figure Description

[0013] Figure 1 This is a structural diagram of a self-cleaning evaporation device according to a specific embodiment of the present invention;

[0014] Figure 2 This is a diagram of the liquid distribution plate structure. Detailed Implementation

[0015] To make the objectives, features, and advantages of this invention more apparent and understandable, specific embodiments of the invention are described in detail below with reference to the accompanying drawings. Specific details are set forth in the following description to provide a thorough understanding of the invention. Those skilled in the art can make similar modifications without departing from the inventive concept; therefore, the scope of protection of this invention is not limited to the specific embodiments disclosed below.

[0016] The self-cleaning evaporation device provided by this invention comprises a cylindrical container evaporator 1, a gas-liquid separation chamber 2, a hot air inlet 3, a saturated air outlet 4, a liquid distribution plate 5, a pulse controller 6, and a high-pressure air inlet 7. The hot air inlet 3 is connected to the evaporation device. The saturated air outlet 4 is located at the top of the evaporation device. The hot air inlet 3 is located at the bottom of the evaporation device. The gas-liquid separation chamber 2 is equipped with a gas-liquid separation plate 21, located at the upper part of the evaporation device, and connected to the saturated air outlet 4. The evaporator 1 is located in the middle of the evaporation device, and its interior consists of parallel liquid distribution plates 5. The top of the liquid distribution plates 5 is a liquid distribution trough 51, and the liquid distribution trough 51 has liquid distribution holes 511. The liquid distribution plates 5 are hollow double-sided porous plates with a sandwich 55, and the holes on the liquid distribution plates 5 are self-cleaning air holes 52. The pulse controller 6 is connected to the liquid distribution plates 5, and high-pressure air is introduced into the sandwich 55 of the liquid distribution plates 5 through the pulse controller 6 and the high-pressure air inlet 7, and blown out through the self-cleaning air holes 52 to remove the scale on the surface of the liquid distribution plates 5. The pulse controller is activated periodically to achieve a self-cleaning function.

[0017] In this embodiment, the surface of the liquid distribution plate 5 is coated with an anti-stick coating 53 to prevent scale buildup on the surface of the liquid distribution plate.

[0018] In this embodiment, the liquid distribution tank 51 is configured with a large upper diameter and a small lower diameter.

[0019] In this embodiment, a spray pipe 54 is also included, and a spray tank 51 is connected to the spray pipe 54.

[0020] In this embodiment, the gas-liquid separation plate 21 is configured to fit into the gas-liquid separation chamber 2, and the gas and liquid entrained in the mist are separated between the gas-liquid separation plates 21.

[0021] The evaporation equipment provided by this invention can be widely used in various fields such as chemical, food, medicine, papermaking, textile, machinery manufacturing, and environmental protection where drying, evaporation, concentration, and solution separation are required.

Claims

1. A self-cleaning evaporation device, comprising an evaporation chamber, a gas-liquid separation chamber, a hot air inlet, a saturated air outlet, a liquid distribution plate, a pulse controller, and a high-pressure air inlet; the gas-liquid separation chamber is provided with a gas-liquid separation plate located at the upper part of the evaporation device and connected to the saturated air outlet; the evaporation chamber is located in the middle of the evaporation device and connected to the hot air inlet; the evaporation chamber contains parallel liquid distribution plates, the top of which is a liquid distribution trough with liquid distribution holes; the liquid distribution plate is a hollow double-sided perforated plate with a sandwich structure, and the perforations on the liquid distribution plate are self-cleaning air holes; the pulse controller is connected to the liquid distribution plate, and high-pressure air is introduced into the sandwich structure of the liquid distribution plate through the high-pressure air inlet via the pulse controller and blown out through the self-cleaning air holes to remove scale from the surface of the liquid distribution plate.

2. The self-cleaning evaporation equipment as described in claim 1, characterized in that: The self-cleaning evaporation equipment also includes a liquid spraying pipe, and the liquid distribution tank is connected to the liquid spraying pipe.

3. The self-cleaning evaporation equipment as described in claim 1 or 2, characterized in that: The evaporator is a cylindrical container.

4. The self-cleaning evaporation equipment as described in claim 1 or 2, characterized in that: The surface of the liquid distribution plate is coated with an anti-stick coating.

5. The self-cleaning evaporation device as described in claim 1 or 2, characterized in that: The liquid distribution tank is designed with a large upper diameter and a small lower diameter.

6. The self-cleaning evaporation device as described in claim 1 or 2, characterized in that: The gas-liquid separation plate is configured to fit into the gas-water separation chamber.

7. The self-cleaning evaporation device as described in claim 1 or 2, characterized in that: The saturated air outlet is located at the top of the evaporation equipment; the hot air inlet is located at the bottom of the evaporation equipment.

8. The self-cleaning evaporation equipment as described in claim 1 or 2 is used in chemical, food, pharmaceutical, papermaking, textile, machinery manufacturing, and environmental protection fields where drying, evaporation, concentration, and solution separation are required.

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