A triple-effect falling-film concentration device

Abstract

The utility model belongs to liquid material concentration equipment field especially, it is three -effect falling film concentration device, including one -effect heater, two -effect heater and three -effect heater, the top of one -effect heater is installed one -effect feed pipe, the bottom of one -effect heater is installed two -effect feed pipe, and one end of two -effect feed pipe is installed on the top of two -effect heater, the bottom of two -effect heater is installed three -effect feed pipe, and one end of three -effect feed pipe is installed on the top of three -effect heater, the side of one -effect heater is installed steam inlet pipe, and the other side of one -effect heater is connected with one -effect separator, and the top of one -effect separator is installed two -effect steam pipe, and two -effect steam pipe is linked with two -effect heater. The utility model, through the low -temperature secondary steam heat pressure pressurization of three -effect separator, and the automatic shunt to two -effect or three -effect heater recycling utilization according to temperature, prevent steam counter -current flow simultaneously, realize the technical effect of energy -conserving and loss -reducing, stable heating and the promotion system operation reliability.

Description

Technical Field

[0001] This utility model relates to the field of liquid material concentration equipment technology, and in particular to a triple-effect falling film concentration device. Background Technology

[0002] In the process of liquid material concentration, falling film thickeners are widely used in various industries due to their advantages such as high heat transfer efficiency and short material heating time. Among them, the triple-effect falling film thickener significantly reduces energy consumption by using the secondary steam generated in the previous effect as the heating heat source for the next effect, and has a greater energy-saving advantage compared to single-effect and double-effect thickeners. However, the utilization rate of secondary steam is limited when using a triple-effect falling film concentrator: the secondary steam generated by the second and third effects is at a low temperature and is usually directly condensed and discharged without fully recovering heat. Even if some devices can use the secondary steam, the steam diversion control accuracy of the steam heat recovery mechanism is low and it cannot dynamically adjust the return path according to the steam temperature, resulting in low steam utilization efficiency. Therefore, we propose a triple-effect falling film concentrator to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a triple-effect falling film concentration device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A triple-effect falling film concentration device includes a first-effect heater, a second-effect heater, and a third-effect heater. A first-effect feed pipe is installed at the top of the first-effect heater, a second-effect feed pipe is installed at the bottom of the first-effect heater, one end of the second-effect feed pipe is installed at the top of the second-effect heater, and a third-effect feed pipe is installed at the bottom of the second-effect heater, one end of the third-effect feed pipe is installed at the top of the third-effect heater. A steam inlet pipe is installed on one side of the first-effect heater, and a first-effect separator is connected to the other side of the first-effect heater. A second-effect steam pipe is installed at the top of the first-effect separator and is connected to the second-effect heater. A second-effect separator is located on one side of the second-effect heater, and a third-effect steam pipe connected to the third-effect heater is installed at the top of the second-effect separator. A steam thermal pressure mechanism is connected to the third-effect heater.

[0005] Preferably, a connecting pipe for steam flow is installed at the bottom right side of the first-effect heater, and the connecting pipe is connected to the first-effect separator.

[0006] Preferably, a second connecting pipe for steam flow is installed at the bottom right side of the double-effect heater, and the second connecting pipe is connected to the double-effect separator.

[0007] Preferably, a connecting pipe three for steam flow is installed at the bottom right side of the triple-effect heater, and the connecting pipe three is connected to the triple-effect separator.

[0008] Preferably, the steam hot pressing mechanism includes a steam circulation pipe, a hot pressing pump, a return pipe, and a flow divider shell. The inlet of the hot pressing pump is equipped with a steam circulation pipe that is connected to a triple-effect separator, and the outlet of the hot pressing pump is equipped with a return pipe. One end of the return pipe is equipped with a flow divider shell.

[0009] Preferably, an injection pipe two connected to a triple-effect steam pipe is installed on the top of the diversion shell, and an injection pipe one connected to a double-effect steam pipe is installed on the left side of the diversion shell, and a one-way valve is installed in both injection pipe one and injection pipe two.

[0010] Preferably, a drive seat is slidably installed on the top and bottom inner walls of the diversion shell, a sealing plate for opening and closing the injection tube is installed on the top right side of the drive seat, a sealing plug adapted to the injection tube is installed on the left side of the drive seat, and a push rod motor is installed on the left side of the diversion shell, with the output shaft of the push rod motor fixedly connected to the drive seat.

[0011] Preferably, a temperature sensor is installed on the return pipe, a controller is installed on the front side of the diversion shell, and the temperature sensor and the push rod motor are electrically connected to the controller.

[0012] The beneficial effects of this utility model are: 1. The low-temperature secondary steam of the triple-effect separator is pressurized and heated by a steam thermal pressing mechanism to achieve recycling, avoid energy waste caused by direct discharge of low-temperature steam, and reduce production energy consumption; 2. Relying on the linkage between temperature sensors and controllers, the flow path is automatically switched according to the temperature of the pressurized steam to ensure the stability of the heat source temperature of the double-effect and triple-effect heaters, thereby improving the material concentration efficiency and product quality consistency. 3. The controller automatically receives temperature signals and controls the actuator motor to operate, eliminating the need for manual intervention in switching, reducing operational intensity, and adapting to continuous production requirements. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of a triple-effect falling film concentration device proposed in this utility model; Figure 2 This is a partial three-dimensional structural diagram of a triple-effect falling film concentration device proposed in this utility model; Figure 3 for Figure 2 A cross-sectional three-dimensional structural diagram.

[0014] In the diagram: 101, First-effect heater; 102, Second-effect heater; 103, Third-effect heater; 104, First-effect feed pipe; 105, Second-effect feed pipe; 106, Third-effect feed pipe; 107, Discharge pipe; 201, First-effect separator; 202, Connecting pipe one; 203, Second-effect separator; 204, Connecting pipe two; 205, Third-effect separator; 206, Connecting pipe three; 207, Steam inlet pipe; 208, Second-effect steam pipe; 209, Third-effect steam pipe; 301, Steam circulation pipe; 302, Heat pump; 303, Return pipe; 304, Diverter shell; 305, Injection pipe one; 306, Injection pipe two; 401, Drive base; 402, Sealing plate; 403, Sealing plug; 404, Push rod motor; 405, Temperature sensor; 406, Controller. Detailed Implementation

[0015] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0016] This application discloses a triple-effect falling film concentration device.

[0017] Reference Figure 1-3 A triple-effect falling film concentration device includes a first-effect heater 101, a second-effect heater 102, and a third-effect heater 103. A first-effect feed pipe 104 is installed at the top of the first-effect heater 101, a second-effect feed pipe 105 is installed at the bottom of the first-effect heater 101, one end of the second-effect feed pipe 105 is installed on the top of the second-effect heater 102, and a third-effect feed pipe 106 is installed at the bottom of the second-effect heater 102. One end of the third-effect feed pipe 106 is installed on the top of the third-effect heater 103. A third-effect feed pipe 106 is installed on one side of the first-effect heater 101. A steam inlet pipe 207 is installed. A first-effect heater 101 is connected to a first-effect separator 201 on the other side. A second-effect steam pipe 208 is installed on the top of the first-effect separator 201. The second-effect steam pipe 208 is connected to the second-effect heater 102. A second-effect separator 203 is provided on one side of the second-effect heater 102. A third-effect steam pipe 209 connected to the third-effect heater 103 is installed on the top of the second-effect separator 203. A third-effect separator 205 is provided on one side of the third-effect heater 103. A steam thermal pressure mechanism is connected to the third-effect separator 205.

[0018] In this embodiment, a connecting pipe 202 for steam flow is installed on the bottom right side of the first-effect heater 101. The connecting pipe 202 is connected to the first-effect separator 201, ensuring that the gas-liquid mixture generated by the heating of the material in the first-effect heater 101 can be directionally and without stagnation transported to the first-effect separator 201, avoiding the accumulation of the mixture which affects the heat transfer efficiency of the heater and the subsequent separation effect. A connecting pipe 204 for steam flow is installed on the bottom right side of the second-effect heater 102. The connecting pipe 204 is connected to the second-effect separator 203, ensuring the second-effect... The gas-liquid mixture in heater 102 enters the double-effect separator 203 efficiently along a fixed path, maintaining the stability of gas-liquid separation in the double-effect concentration unit and reducing the ineffective residence time of materials in the heater. A connecting pipe 206 for steam flow is installed at the bottom right side of the triple-effect heater 103. The connecting pipe 206 is connected to the triple-effect separator 205, so that the gas-liquid mixture in the triple-effect heater 103 is accurately delivered to the triple-effect separator 205, avoiding uneven concentration of concentrated materials due to obstructed conveying path and improving the stability of final product quality.

[0019] In this embodiment, the steam hot pressing mechanism includes a steam circulation pipe 301, a hot press pump 302, a return pipe 303, and a distribution shell 304. The steam circulation pipe 301, which is connected to the triple-effect separator 205, is installed on the air inlet of the hot press pump 302. The return pipe 303 is installed on the air outlet of the hot press pump 302. A distribution shell 304 is installed at one end of the return pipe 303. An injection pipe 2 306, which is connected to the triple-effect steam pipe 209, is installed on the top of the distribution shell 304. An injection pipe 1 305, which is connected to the second-effect steam pipe 208, is installed on the left side of the distribution shell 304. Both the injection pipe 1 305 and the injection pipe 2 306 are equipped with one-way valves. This not only realizes the recovery, pressurization, and recycling of the low-temperature secondary steam of the triple-effect separator 205, but also completely blocks the backflow of steam in the second-effect and triple-effect steam pipes 209 to the distribution shell 304 through the one-way valves, ensuring the stability of the temperature and pressure gradient between each effect.

[0020] In this embodiment, a drive seat 401 is slidably installed on the top and bottom inner walls of the diversion shell 304. A sealing plate 402 for opening and closing the second injection pipe 306 is installed on the top right side of the drive seat 401. A sealing plug 403 adapted to the first injection pipe 305 is installed on the left side of the drive seat 401. A push rod motor 404 is installed on the left side of the diversion shell 304. The output shaft of the push rod motor 404 is fixedly connected to the drive seat 401. The push rod motor 404 drives the drive seat 401 to synchronously control the action of the sealing plate 402 and the sealing plug 403, so as to realize the rapid and leak-free switching of the first and second injection pipes 305, and ensure that the pressurized steam can be accurately distributed to the target heater.

[0021] In this embodiment, a temperature sensor 405 is installed on the return pipe 303, and a controller 406 is installed on the front side of the flow divider shell 304. The temperature sensor 405 and the push rod motor 404 are both electrically connected to the controller 406, so that temperature detection and flow divider control form an automated closed loop, eliminating the need for manual judgment and operation. This improves the response speed of steam flow divider and avoids heating instability caused by human operation errors.

[0022] The working principle of this utility model is as follows: The material to be concentrated enters the first-effect heater 101 through the first-effect feed pipe 104. High-temperature steam from the outside is introduced into the first-effect heater 101 through the steam inlet pipe 207 to heat the material. After being heated in the first-effect heater 101, the material forms a gas-liquid mixture. The steam enters the first-effect separator 201 through the connecting pipe 202. The liquid material flows into the second-effect heater 102 through the second-effect feed pipe 105. The separated secondary steam flows into the second-effect heater 102 through the second-effect steam pipe 208 as a heat source. Inside the double-effect heater 102, the material is heated by the secondary steam of the first effect to form a gas-liquid mixture. The steam enters the double-effect separator 203 through the connecting pipe 204. The separated liquid material flows into the triple-effect heater 103 through the triple-effect feed pipe 106. The separated secondary steam flows into the triple-effect heater 103 as a heat source through the triple-effect steam pipe 209. Inside the triple-effect heater 103, the material is heated by the secondary steam of the second effect to form a gas-liquid mixture. The steam enters the triple-effect separator 205 through the connecting pipe 206. The separated concentrated material is discharged from the discharge pipe 107 at the bottom of the triple-effect separator 205. The secondary steam separated by the triple-effect separator 205 enters the hot press pump 302 through the steam circulation pipe 301. After the hot press pump 302 pressurizes and heats the steam, it is sent into the distribution shell 304 through the return pipe 303. The temperature sensor 405 detects the steam temperature in the return pipe 303 in real time and transmits the signal to the controller 406. If the steam temperature is higher than the preset threshold, the controller 406 controls the push rod motor 404 to drive the drive seat 401 to slide to the right. The drive seat 401 drives the sealing plug 403 and the sealing plate 402 to move to the right. The sealing plug 403 can disengage and open the first injection pipe 305. The sealing plate 402 moves below the second injection pipe 306 and closes the second injection pipe 306. The pressurized steam enters the second-effect steam pipe 208 through the first injection pipe 305 to assist the second-effect heating. If the steam temperature is lower than the preset threshold, the controller 406 controls the push rod motor 404 to drive the drive seat 401 to slide to the left. The sealing plate 402 opens the second injection pipe 306 and the sealing plug 403 closes the first injection pipe 305. The pressurized steam enters the third-effect steam pipe 209 through the second injection pipe 306 to assist the third-effect heating. This can achieve the purpose of hot-pressurizing and recycling low-temperature steam. At the same time, the one-way valve ensures that the steam in the double-effect steam pipe 208 and the triple-effect steam pipe 209 will not flow back into the diversion shell 304, thus ensuring the stability of the steam flow direction.

[0023] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A triple-effect falling film concentration device, characterized in that, The device includes a single-effect heater (101), a double-effect heater (102), and a triple-effect heater (103). A single-effect feed pipe (104) is installed on the top of the single-effect heater (101), a double-effect feed pipe (105) is installed on the bottom of the single-effect heater (101), one end of the double-effect feed pipe (105) is installed on the top of the double-effect heater (102), a triple-effect feed pipe (106) is installed on the bottom of the double-effect heater (102), and one end of the triple-effect feed pipe (106) is installed on the top of the triple-effect heater (103). A steam inlet pipe (207) is installed on one side of the first-effect heater (101), and a first-effect separator (201) is connected to the other side of the first-effect heater (101). A second-effect steam pipe (208) is installed on the top of the first-effect separator (201), and the second-effect steam pipe (208) is connected to the second-effect heater (102). A second-effect separator (203) is provided on one side of the second-effect heater (102), and a third-effect steam pipe (209) connected to the third-effect heater (103) is installed on the top of the second-effect separator (203). A third-effect separator (205) is provided on one side of the third-effect heater (103), and a steam thermal pressure mechanism is connected to the third-effect separator (205).

2. The triple-effect falling film concentration device according to claim 1, characterized in that, The bottom right side of the first-effect heater (101) is equipped with a connecting pipe (202) for steam flow, which is connected to the first-effect separator (201).

3. The triple-effect falling film concentration device according to claim 1, characterized in that, The bottom right side of the double-effect heater (102) is equipped with a connecting pipe (204) for steam flow, which is connected to the double-effect separator (203).

4. The triple-effect falling film concentration device according to claim 1, characterized in that, The bottom right side of the triple-effect heater (103) is equipped with a connecting pipe three (206) for steam flow, which is connected to the triple-effect separator (205).

5. A triple-effect falling film concentration device according to claim 1, characterized in that, The steam hot pressing mechanism includes a steam circulation pipe (301), a hot press pump (302), a return pipe (303), and a flow divider (304). The hot press pump (302) has a steam circulation pipe (301) connected to a triple-effect separator (205) installed at its inlet. The hot press pump (302) has a return pipe (303) installed at its outlet. A flow divider (304) is installed at one end of the return pipe (303).

6. A triple-effect falling film concentration device according to claim 5, characterized in that, The top of the diversion shell (304) is equipped with an injection pipe two (306) that is connected to the triple-effect steam pipe (209). The left side of the diversion shell (304) is equipped with an injection pipe one (305) that is connected to the double-effect steam pipe (208). Both the injection pipe one (305) and the injection pipe two (306) are equipped with one-way valves.

7. A triple-effect falling film concentration device according to claim 5, characterized in that, A drive seat (401) is slidably mounted on the top and bottom inner walls of the diversion shell (304). A sealing plate (402) for opening and closing the second injection pipe (306) is mounted on the top right side of the drive seat (401). A sealing plug (403) adapted to the first injection pipe (305) is mounted on the left side of the drive seat (401). A push rod motor (404) is mounted on the left side of the diversion shell (304). The output shaft of the push rod motor (404) is fixedly connected to the drive seat (401).

8. A triple-effect falling film concentration device according to claim 5, characterized in that, A temperature sensor (405) is installed on the return pipe (303), and a controller (406) is installed on the front side of the flow divider shell (304). The temperature sensor (405) and the push rod motor (404) are both electrically connected to the controller (406).

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