Liquid distribution nozzle

Abstract

The utility model discloses a liquid distribution nozzle, which belongs to the technical field of heat exchange evaporation equipment, is suitable for a horizontal tube falling film evaporator, and comprises a shell, a liquid inlet is tangentially arranged on the side wall of the shell, and a liquid outlet is arranged at the bottom of the shell; the cyclone crusher is located in the shell, one end of the cyclone crusher is connected with the inner wall of the top of the shell, the other end of the cyclone crusher and the starting end of the liquid outlet are arranged in a spaced mode, and a spiral structure is arranged on the side wall of the cyclone crusher; and the crushing device is used for crushing the evaporation solution entering the shell. To-be-treated liquid introduced into the shell violently rotates under the drainage of the rotational flow breaker, formed broken water flow is pushed by follow-up water flow to downwards rotate and flow along an annular channel between the rotational flow breaker and the shell, solid water is formed in the hollow position, below the rotational flow breaker, of the shell, and the solid water is sprayed outwards from a liquid outlet; the problem of insufficient liquid supply of the liquid distribution nozzle is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchange evaporation equipment and relates to a liquid distributing nozzle. Background Art

[0002] The horizontal tube falling film evaporator is a highly efficient heat exchange device with the characteristics of high heat transfer coefficient, small heat exchange temperature difference and low power requirement. It is widely used in the fields of thermal seawater desalination and wastewater treatment.

[0003] The liquid distribution nozzle is an important component of the horizontal tube falling film evaporator. Its main function is to evenly spray the evaporating solution on the outer surface of the heat transfer tube to form a uniform liquid distribution in the first or first three rows of the horizontal tube falling film evaporator. The uniformity of the liquid distribution determines the effect of evaporation heat exchange.

[0004] Traditional horizontal tube falling film evaporators use spray heads to spray onto the heat transfer tubes. Because the spray heads are fixed above the heat transfer tubes and spray at a fixed distance, their coverage is affected by the pressure and flow rate of the evaporating solution. This can lead to insufficient liquid supply, preventing the spray range from covering the heat transfer tubes. This results in low evaporation efficiency of the evaporating solution and low utilization of the heating steam within the heat transfer tubes. Furthermore, the spray heads can sometimes become clogged during use.

[0005] It is necessary to provide a liquid dispensing nozzle with sufficient liquid supply. Utility Model Content

[0006] In order to at least solve the problem in the prior art of the conventional horizontal tube falling film evaporator in which insufficient liquid is supplied to the spray head, resulting in the spray range being unable to cover the heat transfer tubes, the present invention provides the following technical solution: a liquid distribution nozzle suitable for a horizontal tube falling film evaporator, the liquid distribution nozzle comprising:

[0007] a housing, wherein a liquid inlet is tangentially provided on a side wall of the housing, and a liquid outlet is provided at the bottom of the housing; and

[0008] A cyclone breaker is located in the shell, one end of the cyclone breaker is connected to the inner wall of the top of the shell, and the other end of the cyclone breaker is spaced apart from the starting end of the liquid outlet. A spiral structure is provided on the side wall of the cyclone breaker for breaking up the evaporated solution entering the shell.

[0009] Optionally, in the above-mentioned liquid distributing nozzle, the cyclone breaker is coaxially arranged with the shell, and the cyclone breaker extends downward to the middle of the shell.

[0010] Optionally, in the above-mentioned liquid dispensing nozzle, the diameter of the shell above the liquid outlet decreases in steps from top to bottom along the height direction;

[0011] The diameter of the cyclone breaker decreases step by step from top to bottom along the height direction of the shell.

[0012] Optionally, in the above-mentioned liquid dispensing nozzle, the housing comprises: a cylindrical portion, a straight tube portion and a flared portion;

[0013] The liquid inlet is provided on the upper portion of the side wall of the cylindrical portion;

[0014] The diameter of the straight tube portion is smaller than the diameter of the cylindrical portion, one end of the straight tube portion is connected to the cylindrical portion, and the other end of the straight tube portion is connected to the flared portion;

[0015] The flared portion is in a trumpet shape.

[0016] Optionally, in the above-mentioned liquid distributing nozzle, the cyclone breaker comprises: a first spiral cylinder and a second spiral cylinder;

[0017] The first spiral column is located inside the cylindrical portion, and one end of the first spiral column is connected to the inner wall of the cylindrical portion;

[0018] The diameter of the second spiral cylinder is smaller than that of the first spiral cylinder. One end of the second spiral cylinder is smoothly connected to the other end of the first spiral cylinder. The second spiral cylinder extends from the inner side of the cylindrical portion to the inner side of the straight tube portion. The other end of the second spiral cylinder is a pointed end.

[0019] Optionally, in the above-mentioned liquid dispensing nozzle, the distance between the tip and the starting end of the flared portion is 2 / 3 to 1 times the inner diameter of the straight tube.

[0020] Optionally, in the above-mentioned liquid distributing nozzle, the shape of the liquid inlet is rectangular.

[0021] Optionally, in the above-mentioned liquid distribution nozzle, the width of the liquid inlet is less than or equal to 1 / 2 of the width of the annular gap between the shell and the cyclone breaker.

[0022] Optionally, in the above-mentioned liquid dispensing nozzle, the spraying angle of the liquid outlet is 110° to 130°.

[0023] Optionally, in the above-mentioned liquid distributing nozzle, a wear-resistant layer is provided on the inner wall of the shell.

[0024] The beneficial effects of the technical solution provided by the embodiment of the utility model are:

[0025] The present application provides a liquid inlet tangentially connected to the inner cavity of the shell, and a cyclone breaker with a spiral structure in the shell. The liquid to be treated is introduced into the shell and rotates violently under the guidance of the cyclone breaker. The formed broken water flow is driven by the subsequent water flow and rotates downward along the annular channel between the cyclone breaker and the shell, and forms solid water in the hollow part of the shell below the cyclone breaker. Finally, the solid water is sprayed outward from the liquid outlet (liquid distribution), thereby solving the problem of insufficient liquid supply to the liquid distribution nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic structural diagram of a liquid dispensing nozzle provided in an embodiment of the present utility model;

[0027] Figure 2 A bottom view schematically illustrates the positional relationship between a housing and a liquid inlet in a liquid dispensing nozzle provided in an embodiment of the present utility model;

[0028] In the figure: 1. Shell; 101. Barrel portion; 102. Straight tube portion; 103. Expanded portion; 2. Cyclone crusher; 201. First spiral cylinder; 202. Second spiral cylinder; 203. Tip; 3. Liquid inlet; 4. Liquid outlet. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention. The terms "connected", "connected", and "set" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components; they can be wired electrical connections, radio connections, or wireless communication signal connections. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] See also Figure 1-2 The present invention provides the following technical solutions: a liquid distribution nozzle, suitable for a horizontal tube falling film evaporator, the liquid distribution nozzle of the present application comprises: a shell 1 and a cyclone breaker 2. The side wall of the shell 1 is provided with a liquid inlet 3, such as Figure 2As shown, the liquid inlet 3 is tangentially connected to the shell 1. The shape of the liquid inlet 3 is not limited in this embodiment, and it can be rectangular, square, or circular. A liquid outlet 4 is provided at the bottom of the shell 1. The cyclone breaker 2 is located in the shell 1. Preferably, the cyclone breaker 2 is coaxially arranged with the shell 1, one end of the cyclone breaker 2 is connected to the top inner wall of the shell 1, and the other end of the cyclone breaker 2 is spaced apart from the starting end of the liquid outlet 4, that is, relative to the entire shell 1, there is still a hollow section in the shell 1 where the cyclone breaker 2 is not arranged. Usually, the cyclone breaker 2 extends downward to the middle of the shell 1. A spiral structure is provided on the side wall of the cyclone breaker 2 (along its length direction). During use, the liquid to be treated (such as seawater, wastewater, etc.) is introduced into the inner cavity of the shell 1 through the liquid inlet 3. Under the guidance of the cyclone breaker 2 in the center of the shell 1, the flow direction of the water flow undergoes a violent rotation (diversion), forming a broken water flow. Driven by the subsequent water flow, the broken water flow rotates downward along the annular channel between the cyclone breaker 2 and the shell 1, and forms a solid water in the hollow part of the shell 1 below the cyclone breaker 2. Finally, the solid water is sprayed outward from the liquid outlet 4 (liquid distribution), thus solving the problem of insufficient liquid supply to the liquid distribution nozzle. It should be noted that the cyclone breaker 2 can also prevent the water flow from being blocked inside the shell.

[0032] The diameter of the shell 1 above the liquid outlet 4 decreases step by step from top to bottom along the height direction, and the diameter of the cyclone crusher 2 decreases step by step from top to bottom along the height direction of the shell 1. Figure 1 As shown, the diameter change of the cyclone breaker 2 is roughly synchronized with the diameter change of the shell 1. Of course, it is best that the cyclone breaker 2 changes before the shell 1. Before the diameter of the shell 1 decreases, the cyclone breaker 2 decreases in advance. In this way, the rotating water flow around the cyclone breaker 2 can be gradually reduced without affecting the flow of water, thereby creating conditions for the formation of solid water.

[0033] As an embodiment of the specific structure of the housing 1, in this embodiment, the housing 1 includes: a cylindrical portion 1, a straight pipe portion 102 and a flared portion 103. The upper portion of the side wall of the cylindrical portion 1 is provided with a liquid inlet 3 (such as Figure 2 As shown). The diameter of the straight tube portion 102 is smaller than that of the cylindrical portion 1. One end of the straight tube portion 102 is connected to the cylindrical portion 1, and the other end of the straight tube portion 102 is connected to the flared portion 103. The inner cavity of the flared portion 103, also referred to herein as the liquid outlet 4, is flared. Preferably, the spraying angle of the liquid outlet 4 is 110° to 130°, for example, 110°, 115°, 120°, 125°, or 130°. A spraying angle of 120° achieves the best spraying effect.

[0034] As an embodiment of the specific structure of the above-mentioned cyclone breaker 2, in this embodiment, the cyclone breaker 2 includes: a first spiral cylinder 201 and a second spiral cylinder 202. Among them, the first spiral cylinder 201 is located at the inner center of the barrel portion 1, and one end of the first spiral cylinder 201 is fixedly connected to the inner wall of the barrel portion 1. The diameter of the second spiral cylinder 202 is smaller than the diameter of the first spiral cylinder 201, and at the same time, one end of the second spiral cylinder 202 is smoothly connected to the other end of the first spiral cylinder 201, so that eddy currents and resistance can be reduced. The second spiral cylinder 202 extends from the inner side of the barrel portion 1 to the inner side of the straight pipe portion 102, that is, the cyclone breaker 2 changes in diameter before the shell 1, so as not to affect the flow of water. The other end of the second spiral cylinder 202 is a tip 203. Under the guidance of the tip 203, the water flow forms solid water in the hollow part of the shell 1. Preferably, the distance between the tip 203 of the second spiral column 202 and the starting end of the flared portion 103 of the housing 1 (ie, the bottom of the straight tube) is 2 / 3 to 1 times the inner diameter of the straight tube, which achieves the best water flow rectification effect.

[0035] As an example of a specific shape of the liquid inlet 3, in this embodiment, the shape of the liquid inlet 3 is rectangular (such as square), so that after the water flows along the square liquid inlet 3 into the inner cavity of the shell 1, the rotation resistance encountered by the water flow can be reduced.

[0036] Reference Figure 2 As shown, the width of the liquid inlet 3 is less than or equal to 1 / 2 of the width of the annular gap between the housing 1 and the cyclone breaker 2, so as to facilitate the drainage of the cyclone breaker 2. Preferably, a wear-resistant layer is provided on the inner wall of the housing 1 to ensure the wear resistance of the housing 1.

[0037] It is understood from common technical knowledge that the present invention may be implemented through other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

Claims

1. A liquid distribution nozzle suitable for a horizontal tube falling film evaporator, characterized in that: The liquid dispensing nozzle comprises: a housing, wherein a liquid inlet is tangentially provided on a side wall of the housing, and a liquid outlet is provided at the bottom of the housing; and a cyclone breaker located within the housing, one end of the cyclone breaker connected to the top inner wall of the housing, the other end of the cyclone breaker spaced from the starting end of the liquid outlet, and a spiral structure provided on the side wall of the cyclone breaker for breaking up the evaporated solution entering the housing; The shell comprises: a cylindrical portion, a straight tube portion and a flared portion; The liquid inlet is provided on the upper portion of the side wall of the cylindrical portion; The diameter of the straight tube portion is smaller than the diameter of the cylindrical portion, one end of the straight tube portion is connected to the cylindrical portion, and the other end of the straight tube portion is connected to the flared portion; The flared portion is in a trumpet shape; The cyclone breaker comprises: a first spiral cylinder and a second spiral cylinder; The first spiral column is located inside the cylindrical portion, and one end of the first spiral column is connected to the inner wall of the cylindrical portion; The diameter of the second spiral cylinder is smaller than that of the first spiral cylinder, one end of the second spiral cylinder is smoothly connected to the other end of the first spiral cylinder, the second spiral cylinder extends from the inner side of the cylindrical portion to the inner side of the straight tube portion, and the other end of the second spiral cylinder is a pointed end; The distance between the tip and the starting end of the flared portion is 2 / 3 to 1 times the inner diameter of the straight tube portion.

2. The liquid dispensing nozzle according to claim 1, characterized in that: The cyclone breaker is coaxially arranged with the shell, and the cyclone breaker extends downward to the middle of the shell.

3. The liquid dispensing nozzle according to claim 1, characterized in that: The diameter of the shell above the liquid outlet decreases step by step from top to bottom along the height direction; The diameter of the cyclone breaker decreases step by step from top to bottom along the height direction of the shell.

4. The liquid dispensing nozzle according to claim 1, characterized in that The shape of the liquid inlet is rectangular.

5. The liquid dispensing nozzle according to claim 1, characterized in that: The width of the liquid inlet is less than or equal to 1 / 2 of the width of the annular gap between the shell and the cyclone breaker.

6. The liquid dispensing nozzle according to claim 1, characterized in that: The spraying angle of the liquid outlet is 110° to 130°.

7. The liquid dispensing nozzle according to claim 1, characterized in that: A wear-resistant layer is provided on the inner wall of the shell.

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