Ammonia water evaporator for alkaline etching liquid cyclic regeneration system

Abstract

The utility model relates to the technical field of cyclic regeneration of alkaline etching liquid, and discloses an ammonia water evaporator for an alkaline etching liquid cyclic regeneration system, which comprises a shell, mounting plates are embedded at the top end and the bottom end of the shell, a plurality of heat exchange tubes are clamped between the two mounting plates, a lower shell cover is arranged at the bottom end of the shell, and an upper shell cover is arranged at the bottom end of the shell. A condensate water discharge pipe is fixedly arranged in the middle of the bottom end of the lower shell cover, a heating water tank connected with the condensate water discharge pipe is arranged below the shell, and an ammonia water vapor discharge pipe is fixedly arranged at the top of one side of the shell; condensed steam can be recycled through the heating water tank connected with the condensate water discharge pipe, meanwhile, the internal heat exchange pipe is arranged to be of a detachable structure, the heat exchange pipe can be conveniently and regularly detached to clean the surface of the heat exchange pipe, and the heat exchange efficiency is guaranteed; and water vapor in the ammonia water vapor can be adsorbed through a water absorption layer arranged in the water absorption box.

Description

Technical Field

[0001] The utility model relates to the technical field of alkaline etching solution recycling and regeneration, in particular to an ammonia water evaporator used in an alkaline etching solution recycling and regeneration system. Background Art

[0002] At present, during the recycling and regeneration process of alkaline etching solution, ammonia water or liquid ammonia must be added to the regeneration solution. Using ammonia water will cause the solution to increase and cannot be handled, and using liquid ammonia has a greater safety risk. Therefore, an ammonia water evaporator is needed to evaporate the ammonia water to meet the regeneration of alkaline etching solution.

[0003] After searching, an ammonia water evaporator disclosed in application number 202121950134.1 includes a cylinder, an ammonia outlet assembly is installed on the left wall of the cylinder, and an ammonia outlet flange is installed on the left wall of the ammonia outlet pipe, an ammonia water inlet pipe is installed on the left wall of the cylinder, and an ammonia water inlet flange is installed on the left wall of the ammonia water inlet pipe; a first tube sheet is provided on the upper wall of the cylinder, and a plurality of tube holes are provided inside the first tube sheet; the utility model heats the heat exchange tubes by water vapor, thereby achieving the purpose of heating and evaporating the ammonia water, and in the process of heating and evaporating, not one heat exchanger works, but multiple heat exchange tubes work simultaneously, which can greatly improve the efficiency of ammonia water evaporation;

[0004] However, the above method has the following defects in actual use: the ammonia gas generated by heating and evaporating the ammonia water contains water vapor, which is difficult to separate, and the steam after heat exchange is directly discharged, resulting in a waste of resources. Utility Model Content

[0005] The utility model aims to provide an ammonia water evaporator for an alkaline etching solution recycling and regeneration system, which has the effect of facilitating the separation of ammonia gas from ammonia water vapor generated by heating and evaporation.

[0006] The above technical purpose of the present utility model is achieved through the following technical solutions: an ammonia evaporator for an alkaline etching liquid recycling and regeneration system, comprising a shell, the top and bottom ends of the shell are both embedded with mounting plates, a plurality of heat exchange tubes are clamped between the two mounting plates, the top end of the shell is provided with an upper shell cover, the bottom end of the shell is provided with a lower shell cover, a condensate discharge pipe is fixedly provided in the middle of the bottom end of the lower shell cover, a heating water tank connected to the condensate discharge pipe is provided below the shell, an ammonia vapor discharge pipe is fixedly provided at the top of one side of the shell, a water absorption box connected to the ammonia vapor discharge pipe is provided on one side of the shell, and a water absorption layer is provided inside the water absorption box.

[0007] The present invention is further configured as follows: a surface of the upper mounting plate is provided with a plurality of mounting holes 1 corresponding to the size of the heat exchange tube; a surface of the lower mounting plate is provided with a plurality of mounting holes 2 corresponding to the size of the heat exchange tube; and the cross-section of the mounting hole 2 is T-shaped, which is engaged with the bottom of the heat exchange tube, and a limiting ring is fixed on the top of the heat exchange tube.

[0008] The present invention is further configured as follows: a plurality of baffles are fixedly provided on the inner wall of the shell, and the baffles are installed in an equidistant, uniform and centrally symmetrical arrangement.

[0009] The present invention is further configured as follows: an ammonia water inlet pipe is fixedly provided on the top of one side of the shell, and a sewage discharge pipe is fixedly provided on the bottom of the other side of the shell.

[0010] The utility model is further configured as follows: a water inlet pipe is fixedly provided on the top of one side of the heating water tank, a drain pipe is fixedly provided on the bottom of one side of the heating water tank, and control valves are provided on the surfaces of the water inlet pipe and the drain pipe.

[0011] The utility model is further configured as follows: a recovery pipe connected to the condensate discharge pipe is fixedly provided in the middle of the top of the heating water tank, an exhaust pipe is fixedly provided on the top of the other side of the heating water tank, a steam inlet pipe is fixedly provided in the middle of the top of the upper shell cover, and a connecting pipe is connected between the steam inlet pipe and the exhaust pipe.

[0012] The utility model is further configured as follows: the water suction box is composed of two water suction boxes with one side open, and a connecting plate is fixedly provided on one side of the opening of the water suction box, the two connecting plates are connected by connecting bolts, an air inlet pipe connected to the ammonia vapor exhaust pipe is fixedly provided in the middle of the water suction box close to the shell, and an air outlet pipe is fixedly provided in the middle of the water suction box away from the shell.

[0013] The utility model is further configured as follows: a mounting bracket fixedly connected to the side wall of the shell is provided below the water suction box, a mounting seat is fixedly provided at one end of the mounting bracket close to the water suction box, and the mounting seat is connected to the bottom of one of the water suction boxes by a mounting screw.

[0014] To sum up, the utility model has the following beneficial effects: the utility model can recycle and reuse the condensed steam by setting a heating water tank connected to the condensed water discharge pipe, and at the same time, the internal heat exchange tube is set as a detachable structure, which can be conveniently disassembled and cleaned on a regular basis to ensure heat exchange efficiency; the water absorption layer inside the water absorption box can adsorb water vapor in ammonia water vapor, realize the separation of evaporated water vapor and ammonia gas, so as to meet the regeneration of alkaline etching solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is one of the three-dimensional structural diagrams of the utility model;

[0016] Figure 2 This is the second three-dimensional structural diagram of the utility model;

[0017] Figure 3 It is a schematic diagram of the local structure of the utility model;

[0018] Figure 4 For this utility model Figure 3 Schematic diagram of the cross-section structure.

[0019] In the figure: 1. Shell; 101. Mounting plate; 102. Mounting hole 1; 103. Mounting hole 2; 104. Heat exchange tube; 105. Limiting ring; 106. Baffle; 107. Upper shell cover; 108. Steam inlet pipe; 109. Lower shell cover; 1010. Condensate discharge pipe; 1011. Ammonia inlet pipe; 1012. Drain pipe; 1013. Ammonia steam discharge pipe; 2. Heating water tank; 201. Water inlet pipe; 202. Drain pipe; 203. Recovery pipe; 204. Exhaust pipe; 205. Connecting pipe; 3. Water suction box; 301. Water suction box; 302. Air inlet pipe; 303. Air outlet pipe; 304. Connecting plate; 305. Mounting bracket; 306. Mounting base. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] See also Figures 1 to 4In an embodiment of the present invention, an ammonia evaporator for an alkaline etching solution recycling and regeneration system includes a shell 1, and a mounting plate 101 is embedded at the top and bottom of the shell 1. A plurality of heat exchange tubes 104 are clamped between the two mounting plates 101, so that water vapor passes through the heat exchange tubes 104 to perform heat exchange treatment on the added ammonia water, so that the heat exchange tubes 104 can be replaced regularly. An upper shell cover 107 is provided at the top of the shell 1, and a fixing plate is fixedly provided on the top of the shell 1 and the bottom of the upper shell cover 107. The two fixing plates are connected by fixing bolts. A lower shell cover 109 is provided at the bottom of the shell 1, and a fixing plate is fixedly provided on the bottom of the shell 1 and the top of the lower shell cover 109. The two fixing plates are connected by fixing bolts. The upper shell cover 107 and the lower shell cover 109 are used to connect the upper shell cover 107 and the lower shell cover 109. The shell 1 is sealed and easy to disassemble and replace its internal components. A condensate discharge pipe 1010 is fixedly provided in the middle of the bottom end of the lower shell cover 109. A heating water tank 2 connected to the condensate discharge pipe 1010 is provided below the shell 1, so that the condensed water generated after the water vapor is condensed can be recovered to the heating water tank 2 for recycling. A heating pipe is provided inside the heating water tank 2, and a liquid level window is provided on the surface of the heating water tank 2, which can understand the water level inside the heating water tank 2 in real time. An ammonia vapor discharge pipe 1013 is fixedly provided on the top of one side of the shell 1, and a water absorption box 3 connected to the ammonia vapor discharge pipe 1013 is provided on one side of the shell 1. A water absorption layer is provided inside the water absorption box 3, which is an alkaline lime layer, and adsorbs and separates water vapor in the heated and evaporated ammonia vapor.

[0022] In this embodiment, preferably, the surface of the upper mounting plate 101 is provided with a plurality of first mounting holes 102 corresponding to the size of the heat exchange tube 104, and the surface of the lower mounting plate 101 is provided with a plurality of second mounting holes 103 corresponding to the size of the heat exchange tube 104, and the cross-section of the second mounting hole 103 is T-shaped, which engages the bottom of the heat exchange tube 104, and a limiting ring 105 is fixed on the top of the heat exchange tube 104 to limit the position of the heat exchange tube 104;

[0023] In this embodiment, preferably, a plurality of baffles 106 are fixedly provided on the inner wall of the housing 1. The baffles 106 are installed in an equidistant, uniform, and centrally symmetrical arrangement to guide the ammonia solution passing therethrough, thereby improving the heat exchange efficiency.

[0024] In this embodiment, preferably, an ammonia water inlet pipe 1011 is fixedly provided on the top of one side of the shell 1, so that the ammonia water can flow into the interior of the shell 1, and a sewage pipe 1012 is fixedly provided on the bottom of the other side of the shell 1, so that impurities inside the shell 1 can be discharged;

[0025] In this embodiment, preferably, a water inlet pipe 201 is fixedly provided on the top of one side of the heating water tank 2, so as to add water to the heating water tank 2, and a drain pipe 202 is fixedly provided on the bottom of one side of the heating water tank 2, so as to discharge the remaining water in the heating water tank 2, and control valves are provided on the surfaces of the water inlet pipe 201 and the drain pipe 202 for controlling the opening and closing of the water inlet pipe 201 and the drain pipe 202;

[0026] In this embodiment, preferably, a recovery pipe 203 connected to the condensed water discharge pipe 1010 is fixedly provided at the middle of the top of the heating water tank 2, so that the condensed water generated by the condensed water vapor can be recovered to the heating water tank 2 for recycling. An exhaust pipe 204 is fixedly provided at the top of the other side of the heating water tank 2, and a steam inlet pipe 108 is fixedly provided at the middle of the top of the upper shell cover 107. A connecting pipe 205 is connected between the steam inlet pipe 108 and the exhaust pipe 204, so that the water vapor generated by the heating inside the heating water tank 2 can enter the shell 1 through the connecting pipe 205;

[0027] In this embodiment, preferably, the water absorption box 3 is composed of two water absorption boxes 301 with an opening on one side, and a connecting plate 304 is fixedly provided on one side of the opening of the water absorption box 301. The two connecting plates 304 are connected by connecting bolts, which is convenient for disassembling the water absorption box 301 and replacing the water absorption layer installed therein to ensure the water absorption effect. An air inlet pipe 302 connected to the ammonia vapor exhaust pipe 1013 is fixedly provided in the middle of the water absorption box 301 close to the shell 1, so that the heated and evaporated ammonia vapor can enter the interior of the water absorption box 3 to adsorb the water vapor. An air outlet pipe 303 is fixedly provided in the middle of the water absorption box 301 away from the shell 1, so that the separated ammonia can be used to regenerate the alkaline etching solution;

[0028] In this embodiment, preferably, a mounting bracket 305 fixedly connected to the side wall of the shell 1 is provided below the water suction box 3, and a mounting seat 306 is fixedly provided at one end of the mounting bracket 305 close to the water suction box 3. The mounting seat 306 is connected to the bottom of one of the water suction boxes 301 by mounting screws, thereby fixing the position of the water suction box 3 and facilitating the disassembly and assembly of the water suction box 3.

[0029] When in use, first add a certain amount of water into the interior of the heating water tank 2 through the water inlet pipe 201, and use the heating water tank 2 to heat the water inside. The water vapor generated after heating enters the interior of the heat exchange tube 104 through the connecting pipe 205;

[0030] Then, 20% ammonia water is introduced into the interior of the shell 1 through the ammonia water inlet pipe 1011, and the heat exchange pipe 104 inside the shell 1 is used to heat and evaporate the introduced ammonia water. The condensed water generated after the heat exchange is discharged into the interior of the heating water tank 2 through the condensed water discharge pipe 1010 for recovery and then heated for utilization. The ammonia vapor generated by heating and evaporation enters the interior of the water absorption box 3 through the ammonia vapor discharge pipe 1013, and the water vapor in the ammonia vapor is adsorbed and separated by the water absorption layer in the water absorption box 3. The separated ammonia gas is used to regenerate the alkaline etching solution.

[0031] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the present invention patent application are included in the scope of the present invention patent application.

Claims

1. An ammonia evaporator for an alkaline etching solution recycling and regeneration system, comprising a housing (1), characterized in that: The top and bottom ends of the shell (1) are both embedded with mounting plates (101), and a plurality of heat exchange tubes (104) are clamped between the two mounting plates (101). The top end of the shell (1) is provided with an upper shell cover (107), and the bottom end of the shell (1) is provided with a lower shell cover (109). A condensate discharge pipe (1010) is fixedly provided in the middle of the bottom end of the lower shell cover (109). A heating water tank (2) connected to the condensate discharge pipe (1010) is provided below the shell (1). An ammonia vapor discharge pipe (1013) is fixedly provided at the top of one side of the shell (1). A water absorption box (3) connected to the ammonia vapor discharge pipe (1013) is provided on one side of the shell (1), and a water absorption layer is provided inside the water absorption box (3).

2. The ammonia evaporator for the alkaline etching solution recycling system according to claim 1, characterized in that: The surface of the mounting plate (101) located above is provided with a plurality of mounting holes (102) corresponding to the size of the heat exchange tube (104), and the surface of the mounting plate (101) located below is provided with a plurality of mounting holes (103) corresponding to the size of the heat exchange tube (104), and the cross section of the mounting hole (103) is T-shaped, which is engaged with the bottom of the heat exchange tube (104), and a limiting ring (105) is fixed on the top of the heat exchange tube (104).

3. The ammonia evaporator for the alkaline etching solution recycling system according to claim 1, characterized in that: A plurality of baffles (106) are fixedly provided on the inner wall of the shell (1), and the baffles (106) are installed in an equidistant, uniform, and centrally symmetrical arrangement.

4. The ammonia evaporator for the alkaline etching solution recycling system according to claim 1, characterized in that: An ammonia water inlet pipe (1011) is fixedly provided on the top of one side of the shell (1), and a sewage discharge pipe (1012) is fixedly provided on the bottom of the other side of the shell (1).

5. The ammonia evaporator for the alkaline etching solution recycling system according to claim 1, characterized in that: A water inlet pipe (201) is fixedly provided on the top of one side of the heating water tank (2), a drainage pipe (202) is fixedly provided on the bottom of one side of the heating water tank (2), and control valves are provided on the surfaces of the water inlet pipe (201) and the drainage pipe (202).

6. The ammonia evaporator for the alkaline etching solution recycling system according to claim 1, characterized in that: A recovery pipe (203) connected to the condensate discharge pipe (1010) is fixedly provided at the middle of the top of the heating water tank (2), an exhaust pipe (204) is fixedly provided at the top of the other side of the heating water tank (2), a steam inlet pipe (108) is fixedly provided at the middle of the top of the upper shell cover (107), and a connecting pipe (205) is connected between the steam inlet pipe (108) and the exhaust pipe (204).

7. The ammonia evaporator for the alkaline etching solution recycling system according to claim 1, characterized in that: The water suction box (3) is composed of two water suction boxes (301) with one side open, and a connecting plate (304) is fixedly provided on one side of the opening of the water suction box (301), and the two connecting plates (304) are connected by connecting bolts. An air inlet pipe (302) connected to an ammonia vapor discharge pipe (1013) is fixedly provided in the middle of the water suction box (301) close to the shell (1), and an air outlet pipe (303) is fixedly provided in the middle of the water suction box (301) away from the shell (1).

8. The ammonia evaporator for the alkaline etching solution recycling system according to claim 7, characterized in that: A mounting bracket (305) fixedly connected to the side wall of the shell (1) is provided below the water suction box (3); a mounting seat (306) is fixedly provided at one end of the mounting bracket (305) close to the water suction box (3); and the mounting seat (306) is connected to the bottom of one of the water suction boxes (301) via mounting screws.

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