Frozen brine purification treatment device

Abstract

The utility model discloses a frozen brine purification treatment device which comprises at least one group of pretreatment device and a plate-and-frame filter pressing device, wherein the pretreatment device comprises a filter box, a filter bag is arranged in the filter box, the filter box is connected with a water inlet pipeline, the lower part of the filter box is connected with a middle pipeline, and the middle pipeline is connected with a plate-and-frame filter pressing device; the plate-and-frame filter pressing device comprises a rack, a filter plate frame is arranged on the rack, filter cloth is arranged on the filter plate frame, a fixing plate and an extrusion plate are arranged on the two sides of the rack respectively, a square funnel is arranged below the rack, a frozen saline water inlet is formed in the rack and connected with a middle pipeline, and a frozen saline water outlet is formed in the lower portion of the same side and connected with a water outlet pipeline. A hydraulic pressing device is arranged on the other side of the machine frame and connected with the extrusion plate through a hydraulic rod. In general, the device has the advantages of improving the quality of frozen saline water, improving the freezing efficiency, being recycled, being good in time and purification treatment effect and being high in automation control degree.

Description

Technical Field

[0001] The utility model belongs to the technical field of freezing brine treatment, and particularly relates to a freezing brine purification treatment device. Background Technique

[0002] With the development of chemical enterprises in recent years, more and more chemical reaction devices, concentration and distillation devices need to be cooled. Undoubtedly, freezing brine is the best in terms of cooling effect. Industrial freezing brine is an aqueous solution of calcium chloride. Its characteristic is that when the brine concentration is lower than the eutectic point concentration, the temperature is lower than the salt precipitation temperature of this concentration, and at the same time higher than the eutectic point temperature, ice will precipitate and the solution concentration will increase. When the brine concentration is higher than the eutectic point concentration, the temperature is lower than the salt precipitation temperature of this concentration, and at the same time higher than the eutectic point temperature, salt will precipitate and the solution concentration will decrease. At the same time, industrial freezing brine has the advantages of easy availability of raw materials, low price, good cooling effect, etc. Therefore, it is generally used as a coolant and plays an important role in aspects such as cooling and temperature control in chemical production.

[0003] However, since the brine circulation pipeline usually adopts other metal pipelines such as iron or stainless steel pipelines, the pipeline will rust during operation. Coupled with the addition of other reagents, rust sludge and dirt are easily formed after accumulation, blocking the brine circulation pipeline, reducing the flow rate, increasing the operating pressure of the brine circulation device, and also increasing the cost of brine circulation. Therefore, in order to reduce the brine circulation pressure and operating cost, it is necessary to optimize the brine circulation process and purify the dirt and rust sludge in the freezing brine. Therefore, we need to design a freezing brine purification treatment device. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a freezing brine purification treatment device, which can clean and remove impurities in the freezing brine, improve the quality and freezing efficiency of the freezing brine, has good freezing brine purification treatment effect, high degree of automation control, and effectively increases the recycling time of the freezing brine.

[0005] The purpose of the utility model is realized as follows: A freezing brine purification treatment device includes at least one set of pretreatment device and a plate and frame filter press device;

[0006] Wherein, the pretreatment device includes a filter box, a filter bag is arranged in the filter box and is fitted and matched with the inside of the filter box. An inlet pipeline is connected to the freezing brine inlet above the filter box, and an intermediate pipeline is connected to the freezing brine outlet on one side of the lower part of the filter box. The other end of the intermediate pipeline is connected to the plate and frame filter press device;

[0007] The plate and frame filter press device includes a frame, on which a number of filter plate frames are provided, filter cloths are provided on the filter plate frames, fixed plates and movable pressing plates are respectively provided on both sides of the filter plate frames on the frame, a square funnel is provided below the filter plate frames on the frame, a freezing brine inlet is provided above one side of the frame close to the fixed plate and is connected to an intermediate pipe, and a freezing brine outlet is provided below the same side and is connected to an outlet pipe;

[0008] A hydraulic pressing device is provided on the other side of the frame. The hydraulic pressing device is connected to the pressing plate through a hydraulic rod. The hydraulic pressing device is connected to an oil tank through an oil pump, and an on-line pressure measuring device is provided on the hydraulic pressing device.

[0009] Further, when multiple groups of the pretreatment device and the plate and frame filter press device are provided, they are connected in series with each other to form a multi-stage purification treatment device for use.

[0010] Further, the filter tank adopts a stainless steel cylindrical structure. Flange ports are respectively welded at the freezing brine inlet and the freezing brine outlet on the filter tank, and are respectively connected to an inlet pipe and an intermediate pipe through flanges.

[0011] Further, the filter bag adopts a polytetrafluoroethylene filter bag with a pore size of 50-100 meshes.

[0012] Further, solenoid valves and on-line pressure gauges are respectively provided on the inlet pipe, the intermediate pipe and the outlet pipe.

[0013] Further, the filter plate frame is arranged in a square structure, and the filter cloth on the filter plate frame adopts a polytetrafluoroethylene filter cloth with a pore size of 300-400 meshes.

[0014] Further, the shape and size of the pressing plate are set to be consistent with those of the filter plate frame, and the pressing plate is movably arranged on the frame through a pulley assembly.

[0015] Further, a fixed collection bag is connected below the square funnel.

[0016] Further, the whole frame is a stainless steel cuboid structure. Four support columns are fixed below the frame. Flange ports are respectively welded at the freezing brine inlet and the freezing brine outlet on the frame, and are respectively connected to an intermediate pipe and an outlet pipe through flanges.

[0017] Further, a remote control system is further included. The remote control system is respectively connected to the pretreatment device and the plate and frame filter press device. The remote control system is further provided with a pressure upper limit and lower limit alarm prompt device, including on-site siren alarm and red light prompt warning of the remote control system after exceeding the pressure range. Specifically, the remote control system adopts a DCS computer control system.

[0018] The beneficial effects of the present utility model are as follows: In the present utility model, by setting a pretreatment device and using a filter bag with a pore size of 50-100 meshes for preliminary filtration, most of the impurity particles can be filtered out, reducing the treatment pressure in the subsequent process sections; by setting a plate and frame pressure filtration device and using a filter cloth with a pore size of 300-400 meshes, rust sludge and dirt can be cleaned, improving the quality and freezing efficiency of the chilled brine, saving costs, and greatly increasing the recycling time of the chilled brine; by setting an on-line pressure measuring device and a remote control system, the pressure measurement results can be fed back to the remote control system for remote detection and control, and an upper and lower pressure limit alarm and prompt device is set. When the pressure range is exceeded, an on-site siren will sound an alarm, and the remote control system will give a red light warning; generally speaking, the present utility model can effectively solve problems such as pipeline blockage caused by rust sludge and dirt generated during the operation of the chilled brine, increasing the pressure of the brine circulation device, and increasing the cost of brine circulation, improve the quality and freezing efficiency of the chilled brine, have good purification treatment effect on the chilled brine, have a high degree of automation control, and greatly increase the recycling time of the chilled brine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present utility model.

[0020] In the figure: 1. Pretreatment device; 2. Plate and frame pressure filtration device;

[0021] 11. Filter box; 12. Filter bag; 13. Inlet pipeline; 14. Intermediate pipeline;

[0022] 21. Frame; 21a. Support column; 22. Filter plate and frame; 23. Fixed plate; 24. Extrusion plate; 25. Square funnel; 26. Outlet pipeline; 27. Hydraulic pressing device; 28. Hydraulic rod; 29. Oil tank; 210. On-line pressure measuring device;

[0023] a. Solenoid valve; b. On-line pressure gauge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions of the present utility model will be further specifically described below with reference to the accompanying drawings.

[0025] As Figure 1 shown, a chilled brine purification treatment device includes at least one group of pretreatment device 1 and plate and frame pressure filtration device 2. When multiple groups of the pretreatment device 1 and plate and frame pressure filtration device 2 are provided, each group is connected in series with each other to form a multi-stage purification treatment device for use.

[0026] Among them, the pre-treatment device 1 mainly processes large particle impurities in the circulating chilled brine, facilitating subsequent treatment, reducing the treatment pressure in the subsequent section, and improving the filtration and purification effect. Specifically, it includes a filter box 11, in which a filter bag 12 is arranged to fit the interior of the filter box 11. Preferably, the filter bag 12 is a polytetrafluoroethylene filter bag 12 with a pore size of 50-100 meshes. The filter bag 12 is made of corrosion-resistant polytetrafluoroethylene material, which can extend its service life. An inlet pipe 13 is connected to the chilled brine inlet at the upper part of the filter box 11, and an intermediate pipe 14 is connected to the chilled brine outlet at one side of the lower part of the filter box 11. The other end of the intermediate pipe 14 is connected to the plate and frame filter press device 2. Preferably, the filter box 11 is of a stainless steel cylindrical structure, and flange ports are welded respectively at the chilled brine inlet and the chilled brine outlet on the filter box 11, and the inlet pipe 13 and the intermediate pipe 14 are respectively connected through flanges.

[0027] Among them, the plate and frame filter press device 2 includes a frame 21, on which a number of filter plate frames 22 are arranged, and filter cloths are arranged on the filter plate frames 22. Preferably, the filter plate frames 22 are arranged in a square structure, and the filter cloths on the filter plate frames 22 are polytetrafluoroethylene filter cloths with a pore size of 300-400 meshes. Fixed plates 23 and movable pressing plates 24 are respectively arranged on both sides of the filter plate frames 22 on the frame 21. The filter plate frames 22 are worked by squeezing with the pressing plate 24, which is more convenient for disassembly, cleaning and maintenance. Preferably, the shape and size of the pressing plate 24 are the same as those of the filter plate frames 22. The pressing plate 24 is movably arranged on the frame 21 through a pulley assembly, and the contact position between the pressing plate 24 and the frame 21 is of a pulley structure, which can reduce the friction at the contact position and is more convenient to use.

[0028] Among them, a square funnel 25 is arranged below the filter plate frames 22 on the frame 21, and a fixed collection bag can be connected below the square funnel 25. When the filter plate frames 22 of the plate and frame filter press device 2 are cleaned and maintained, rust sludge and waste water can flow down from the funnel and be collected and processed through the fixed collection bag.

[0029] Among them, the whole frame 21 is of a stainless steel cuboid structure, and four support columns 21a are fixed below the frame 21. An intermediate pipe 14 is connected to the chilled brine inlet near the fixed plate 23 on one side above the frame 21, and an outlet pipe 26 is connected to the chilled brine outlet on the same side below. Flange ports are welded respectively at the chilled brine inlet and the chilled brine outlet on the frame 21, and the intermediate pipe 14 and the outlet pipe 26 are respectively connected through flanges. Preferably, solenoid valves a and in-line pressure gauges b are respectively arranged on the inlet pipe 13, the intermediate pipe 14 and the outlet pipe 26.

[0030] Among them, the extrusion method of the filter plate frame 22 in the plate-and-frame filter press device 2 adopts a hydraulic method. Specifically, a hydraulic pressing device 27 is arranged on the other side of the frame 21. The hydraulic pressing device 27 is connected to the extrusion plate 24 through a hydraulic rod 28. The hydraulic pressing device 27 is connected to an oil tank 29 through an oil pump. Preferably, the oil tank 29 is arranged in a cuboid structure, and a solenoid valve is also installed above the oil tank 29. An on-line pressure measuring device 210 is arranged on the hydraulic pressing device 27. The on-line pressure measuring device 210 can measure the pressure and feedback the pressure measurement result to the remote control system, so as to realize remote detection and control.

[0031] Among them, the remote control system is respectively connected to the pretreatment device 1 and the plate-and-frame filter press device 2 to realize remote monitoring and adjustment of the pretreatment device 1 and the plate-and-frame filter press device 2. The remote control system is also provided with a pressure upper limit and lower limit alarm prompt device, including on-site whistle alarm and red light prompt warning of the remote control system after exceeding the pressure range, so as to be able to handle problems in time. Specifically, the remote control system adopts a DCS computer control system.

[0032] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A chilled brine purification device, characterized in that: It comprises at least one set of pretreatment device (1) and plate-and-frame filter press device (2); The pretreatment device (1) comprises a filter box (11), a filter bag (12) which is matched with the interior of the filter box (11) is arranged in the filter box (11), a water inlet pipe (13) is connected to the frozen brine water inlet on the top of the filter box (11), a middle pipe (14) is connected to the frozen brine water outlet on one side of the lower part of the filter box (11), and the other end of the middle pipe (14) is connected to the plate and frame filter press device (2); The plate-and-frame filter press device (2) comprises a frame (21), a plurality of filter plate frames (22) are arranged on the frame (21), filter cloths are arranged on the filter plate frames (22), fixed plates (23) and movable pressing plates (24) are arranged on both sides of the filter plate frames (22) on the frame (21), a square funnel (25) is arranged on the frame (21) below the filter plate frames (22), a frozen brine water inlet connected to the middle pipe (14) is arranged above one side of the frame (21) close to the fixed plate (23), and a frozen brine water outlet connected to the water outlet pipe (26) is arranged below the same side; A hydraulic pressing device (27) is provided on the other side of the frame (21); the hydraulic pressing device (27) is connected to the extrusion plate (24) via a hydraulic rod (28); the hydraulic pressing device (27) is connected to an oil tank (29) via an oil pump; and an online pressure measuring device (210) is provided on the hydraulic pressing device (27).

2. A chilled brine purification device according to claim 1, characterized in that: When the pretreatment device (1) and the plate and frame filter press device (2) are arranged in multiple groups, they are connected in series to form a multi-stage purification treatment device for use.

3. A chilled brine purification device according to claim 1, characterized in that: The filter box (11) is a stainless steel cylindrical structure. Flanges are welded at the chilled brine water inlet and the chilled brine water outlet of the filter box (11), and are connected to the water inlet pipe (13) and the intermediate pipe (14) via the flanges.

4. A chilled brine purification device according to claim 1, characterized in that: The filter bag (12) is a polytetrafluoroethylene filter bag (12) with a pore size of 50-100 meshes.

5. The chilled brine purification device according to claim 1, characterized in that: The water inlet pipe (13), the intermediate pipe (14) and the water outlet pipe (26) are respectively provided with a solenoid valve (a) and an online pressure gauge (b).

6. A chilled brine purification device according to claim 1, characterized in that: The filter plate frame (22) is arranged in a square structure, and the filter cloth on the filter plate frame (22) is a polytetrafluoroethylene filter cloth with a pore size of 300-400 meshes.

7. The chilled brine purification device according to claim 1, characterized in that: The shape and size of the extrusion plate (24) are consistent with those of the filter plate frame (22), and the extrusion plate (24) is movably arranged on the frame (21) via a pulley assembly.

8. The chilled brine purification device according to claim 1, characterized in that: A collecting bag is connected and fixed below the square funnel (25).

9. The chilled brine purification device according to claim 1, characterized in that: The frame (21) is a stainless steel rectangular parallelepiped structure as a whole. Four support columns (21a) are fixed below the frame (21). Flanges are welded on the frame (21) at the chilled brine inlet and the chilled brine outlet, and are connected to the intermediate pipe (14) and the outlet pipe (26) via flanges.

10. A chilled brine purification device according to any one of claims 1 to 9, characterized in that: It also includes a remote control system, which is connected to the pretreatment device (1) and the plate and frame filter press device (2) respectively. The remote control system is also provided with an upper pressure limit and a lower pressure limit alarm prompt device, including an on-site whistle alarm when the pressure range is exceeded and a remote control system red light warning. Specifically, the remote control system adopts a DCS computer control system.

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