Automatic adjusting device for ensuring constant temperature of inlet water of ultrafiltration device

Abstract

The utility model discloses an automatic adjusting device capable of guaranteeing constant temperature of inlet water of an ultrafiltration device, which relates to the technical field of chemical production and comprises a plate heat exchanger, a plate heat exchanger water outlet pipeline, a remote thermometer, a steam adjusting valve and a programmable logic controller (PLC). The water inlet pump is connected with chemical water through a pump inlet pipe, a cold material outlet of the plate heat exchanger is connected with the water inlet end of the ultrafiltration device through a plate heat exchanger water outlet pipeline, a hot material inlet of the plate heat exchanger is connected with a steam pipeline, and a condensate water pipe is arranged on a condensate water outlet of the plate heat exchanger. And a steam regulating valve and a remote thermometer are respectively arranged on the steam pipeline and the plate exchange water outlet pipeline. The device has the characteristics of real-time monitoring and automatic temperature control, and is used for solving the problems that the water inlet temperature is low, the water yield of an ultrafiltration membrane is reduced, the separation efficiency is reduced, the energy consumption is increased, the service life of the membrane is shortened, and the production operation cost is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to an automatic regulating device for ensuring constant temperature of inlet water of an ultrafiltration device. Background Art

[0002] An ultrafiltration device utilizes an ultrafiltration membrane for separation and purification. Its operating principles are based on sieving theory and adsorption bridging. Ultrafiltration membranes have pore sizes ranging from nanometers to micrometers, allowing water and small molecules to pass through while retaining particles larger than the membrane pore size, bacteria, viruses, colloids, and some organic macromolecules. Driven by a certain pressure, the aqueous solution to be treated passes through the ultrafiltration membrane. Small molecules and solvent molecules within the solution pass through the membrane surface, while larger particles are retained upstream of the membrane, achieving solid-liquid separation and purification.

[0003] During the operation of chemical water treatment plants, especially during the cold winter months in northern China, the ultrafiltration inlet water temperature is too low, causing a decrease in the permeation flux of the ultrafiltration membrane. The permeation flux of the membrane is closely related to its temperature. Low inlet water temperature reduces the water output of the ultrafiltration membrane and may lead to problems such as reduced separation efficiency, increased energy consumption, and shortened membrane life, resulting in increased production and operating costs. Utility Model Content

[0004] In response to the above problems, the utility model provides an automatic regulating device for ensuring the constant temperature of the inlet water of the ultrafiltration device, which has the characteristics of real-time monitoring and automatic temperature control. It is used to solve the problems of low inlet water temperature, reduced water production of the ultrafiltration membrane, reduced separation efficiency, increased energy consumption, shortened membrane life, and increased production and operation costs.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present utility model is as follows:

[0006] An automatic regulating device for ensuring a constant temperature of water inlet to an ultrafiltration device is characterized in that it comprises a plate heat exchanger, a plate heat exchanger water outlet pipe, a remote thermometer, a steam regulating valve, and a PLC controller, wherein the cold material inlet of the plate heat exchanger is connected to the water inlet pump through a pump outlet pipe, the water inlet pump is connected to the chemical water through a pump inlet pipe, the cold material outlet of the plate heat exchanger is connected to the water inlet end of the ultrafiltration device through the plate heat exchanger water outlet pipe, the hot material inlet of the plate heat exchanger is connected to the steam pipe, a condensate pipe is provided on the condensate outlet of the plate heat exchanger, wherein a steam regulating valve and a remote thermometer are respectively provided on the steam pipe and the plate heat exchanger water outlet pipe, and the steam regulating valve and the remote thermometer are respectively installed interlocked with the PLC controller.

[0007] It also includes a security filter, an ultrafiltration water inlet pipe, a plate exchange outlet pipe connected to the security filter water inlet, an ultrafiltration water inlet pipe is provided at the security filter outlet, the ultrafiltration water inlet pipe is connected to the ultrafiltration membrane tube inlet, an ultrafiltration water production pipe is provided at the ultrafiltration membrane tube outlet, an ultrafiltration water production pipe is provided at the ultrafiltration water production pipe outlet, an ultrafiltration water production valve is provided, a concentrated water pipe is provided under the ultrafiltration membrane tube, and a concentrated water valve is provided on the concentrated water pipe.

[0008] The beneficial effects of the utility model are:

[0009] (1) When the utility model is used, when the remote thermometer detects that the temperature inside the plate heat exchanger exceeds the temperature range, the PLC controller controls the opening of the steam regulating valve to control the temperature of the water discharged from the plate heat exchanger.

[0010] (2) When the utility model is used, the security filter is used as a pre-treatment device, which can effectively intercept suspended particles, rust particles, microorganisms, colloids and other impurities larger than the pore size of the filter element in water or fluid, thereby achieving the purpose of solid-liquid separation and purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the present utility model.

[0012] Figure numerals: water inlet pump 1, pump inlet pipe 2, pump outlet pipe 3, plate heat exchanger 4, plate heat exchanger outlet 5, remote thermometer 6, steam pipe 7, steam regulating valve 8, condensate pipe 9, PLC controller 10, safety filter 11, ultrafiltration water inlet pipe 12, ultrafiltration water production pipe 13, ultrafiltration water production valve 14, ultrafiltration membrane tube 15, concentrate pipe 16, concentrate valve 17. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0014] like Figure 1As shown, an automatic regulating device for ensuring constant temperature of water inlet of an ultrafiltration device is characterized in that it includes a plate heat exchanger 4, a plate heat exchanger outlet pipe 5, a remote thermometer 6, a steam regulating valve 8, and a PLC controller 10. The cold material inlet of the plate heat exchanger 4 is connected to the water inlet pump 1 through the pump outlet pipe 3, the water inlet pump 1 is connected to the chemical water through the pump inlet pipe 2, the cold material outlet of the plate heat exchanger 4 is connected to the water inlet end of the ultrafiltration device through the plate heat exchanger outlet pipe 5, the hot material inlet of the plate heat exchanger 4 is connected to the steam pipe 7, and a condensate pipe 9 is provided on the condensate outlet of the plate heat exchanger 4, wherein a steam regulating valve 8 and a remote thermometer 6 are respectively provided on the steam pipe 7 and the plate heat exchanger outlet pipe 5, and the steam regulating valve 8 and the remote thermometer 6 are respectively interlocked and installed with the PLC controller 10.

[0015] like Figure 1 As shown, it also includes a security filter 11, an ultrafiltration water inlet pipe 12, the plate exchange outlet pipe 5 is connected to the water inlet of the security filter 11, the outlet of the security filter 11 is provided with an ultrafiltration water inlet pipe 12, the ultrafiltration water inlet pipe 12 is connected to the inlet of the ultrafiltration membrane tube 15, the outlet of the ultrafiltration membrane tube 15 is provided with an ultrafiltration water production pipe 13, the outlet of the ultrafiltration water production pipe 13 is provided with an ultrafiltration water production valve 14, and a concentrated water pipe 16 is provided below the ultrafiltration membrane tube 15, and concentrated water 17 is provided on the concentrated water pipe 16.

[0016] In the present invention, EPDM rubber gaskets are used at the pipe flange connections. Before use, all pipe fittings in the device are tested for leaks at a pressure of 1.0 MPA. The steam regulating valve 8, ultrafiltration water production valve 14, and concentrated water valve 17 are all butterfly valves for convenient flow operation. The outlet of the safety filter 11 is provided with an ultrafiltration water inlet pipe 12, which is connected to the inlet of the ultrafiltration membrane tube 15. The outlet of the ultrafiltration membrane tube 15 is provided with an ultrafiltration water production pipe 13, and the outlet of the ultrafiltration water production pipe 13 is provided with an ultrafiltration water production valve 14. A concentrated water pipe 16 is provided below the ultrafiltration membrane tube 15, and a concentrated water valve 17 is provided on the concentrated water pipe 16. When in use, open the ultrafiltration water production valve 14 on the ultrafiltration device water production pipe 13, open the concentrated water valve 17 on the concentrated water pipe 16, open the steam regulating valve 8 on the steam pipe 7 to assist the ultrafiltration operation, and start the water inlet pump 1 At the same time, open the condensate pipe valve of the plate heat exchanger 4 to drain the condensate in the plate heat exchanger 4. The security filter 11 is used as a pretreatment device, usually using multi-layer fine filter elements, such as PP (polypropylene) melt-blown filter elements, wire-wound filter elements, pleated filter elements, etc. The pore size of these filter elements is usually between a few microns and tens of microns, which can effectively intercept suspended particles, rust particles, microorganisms, colloids and other impurities larger than the pore size of the filter element in water or fluids. The water inlet direction is low in and high out.

[0017] The thermometer is set to operate in the operating range of 20℃-30℃ and the PLC controller 10. When the remote thermometer 6 detects that the temperature in the plate heat exchanger 4 exceeds the temperature range, the PLC controller 10 controls the opening of the steam regulating valve 8 to control the plate heat exchanger water temperature, thereby achieving a constant inlet water temperature of the ultrafiltration device to ensure stable operation and efficient water production of the ultrafiltration system, and optimize operating conditions to compensate for the adverse effects of low inlet water temperature on water production of the ultrafiltration device.

[0018] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An automatic regulating device for ensuring constant temperature of water inlet to an ultrafiltration device, characterized by: The invention comprises a plate heat exchanger (4), a plate heat exchanger outlet pipe (5), a remote thermometer (6), a steam regulating valve (8), and a PLC controller (10). The cold material inlet of the plate heat exchanger (4) is connected to the water inlet pump (1) through a pump outlet pipe (3), the water inlet pump (1) is connected to the chemical water through a pump inlet pipe (2), the cold material outlet of the plate heat exchanger (4) is connected to the water inlet end of the ultrafiltration device through the plate heat exchanger outlet pipe (5), the hot material inlet of the plate heat exchanger (4) is connected to the steam pipe (7), and a condensate pipe (9) is provided on the condensate outlet of the plate heat exchanger (4), wherein the steam regulating valve (8) and the remote thermometer (6) are respectively provided on the steam pipe (7) and the plate heat exchanger outlet pipe (5), and the steam regulating valve (8) and the remote thermometer (6) are respectively interlocked and installed with the PLC controller (10).

2. The automatic regulating device for ensuring constant temperature of water inlet to an ultrafiltration device according to claim 1, characterized in that: The system further comprises a security filter (11), an ultrafiltration water inlet pipe (12), a plate exchange water outlet pipe (5) connected to the water inlet of the security filter (11), an ultrafiltration water inlet pipe (12) provided at the outlet of the security filter (11), the ultrafiltration water inlet pipe (12) connected to the inlet of the ultrafiltration membrane tube (15), an ultrafiltration water production pipe (13) provided at the outlet of the ultrafiltration membrane tube (15), an ultrafiltration water production valve (14) provided at the water outlet of the ultrafiltration water production pipe (13), a concentrated water pipe (16) provided below the ultrafiltration membrane tube (15), and a concentrated water valve (17) provided on the concentrated water pipe (16).

Images