Siphon tank with filtering function

Abstract

The utility model provides a siphon tank with a filtering function, which aims to solve the problems of frequent cleaning, low working efficiency and the like in the working process of the siphon tank, and comprises a tank body, the upper part and the lower part of the tank body are respectively connected with a liquid inlet pipe and a liquid outlet pipe; a water inlet of the centrifugal pump is connected with the liquid discharge pipe; the filter cartridge is of a closed shell structure and is detachably and fixedly connected to the interior of the tank body, the filter cartridge and the inner wall of the tank body are distributed in a clearance mode, and the liquid discharge pipe is communicated with the interior of the filter cartridge; the temperature control device comprises a heat exchanger and a temperature sensor, the heat exchanger is connected with the tank body and used for controlling the temperature of liquid in the tank body, and the temperature sensor is arranged in the tank body and used for detecting the temperature of the liquid in the tank body; according to the device, the detachable filter cartridge is arranged in the tank body, so that compared with a traditional filter structure, the filter area can be effectively increased, the cleaning frequency is reduced, and the cleaning is convenient; the temperature adjusting device is arranged to adjust the temperature of liquid in the tank body, so that the blockage risk of the filter cartridge can be effectively reduced, and the filtering efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical equipment technical field, especially a siphon tank with filtering function. BACKGROUND

[0002] Centrifugal pump is a kind of equipment for conveying liquid and improving liquid pressure, as a kind of rotating equipment for conveying liquid medium, centrifugal pump is particularly important for continuous chemical production, it is most widely used in chemical production because of its outstanding advantages such as wide performance application range, small volume, simple structure, easy operation, uniform flow, less failure, long service life and low cost, centrifugal pump can carry out liquid delivery due to the action of centrifugal force, before work, pump body and inlet pipeline must be filled with liquid medium, and the chemical industry involves many sewage pools, underground storage tanks and other equipment, at this time, if centrifugal pump wants to be used normally, it needs to increase siphon tank at pump inlet to realize.

[0003] The working principle of siphon tank is that liquid medium is filled in siphon tank, centrifugal pump works and absorbs medium in siphon tank, at this time, liquid level in siphon tank drops, vacuum is formed in the tank, and pressure is lower than atmospheric pressure of pool surface, at this time, liquid is absorbed into siphon tank along inlet pipeline, when liquid discharge of centrifugal pump and liquid inlet into tank reach balance, liquid level in siphon tank no longer drops, and stable working state is reached, so that centrifugal pump realizes self-suction function, various underground sewage or sewage in chemical industry often has more impurities, to ensure the normal work of centrifugal pump, the traditional structure often adds filter before siphon tank, the installation space is large, and there are certain requirements for installation position, at the same time, pipeline filter is generally small, and frequent cleaning may occur, and in chemical industry, due to the particularity of medium, even if there is filter, medium can gather in siphon tank through filter and even produce flocculent material, which has great influence on safe operation and service life of centrifugal pump in long-term state.

[0004] In addition, in low-temperature environment, the viscosity of sewage oil rises, the filtering efficiency is significantly reduced, and salt or metal ions (such as calcium sulfate, calcium carbonate, calcium chloride, aluminum hydroxide, etc.) are easy to crystallize and deposit at low temperature, and some organic or high molecular impurities (such as polyvinyl alcohol, polyacrylamide, polyacrylic acid additive) are more likely to aggregate into flocculent at low temperature, which is easy to cause filter screen blockage in the above-mentioned situation. UTILITY MODEL CONTENTS

[0005] The utility model provides a siphon tank with filtering function to solve the problem of frequent cleaning and low working efficiency in the working process of siphon tank, in order to realize the above-mentioned purpose, the technical scheme is as follows:

[0006] A siphon tank with filtering function, characterized by comprising:

[0007] The tank body is connected with a liquid inlet pipe and a liquid outlet pipe respectively at the upper part and the lower part;

[0008] The centrifugal pump is connected with the liquid outlet pipe at the water inlet;

[0009] The filter cartridge is a closed shell structure, which is detachably fixedly connected to the inside of the tank body, and gaps are distributed between the filter cartridge and the inner wall of the tank body, and the liquid outlet pipe is communicated with the inside of the filter cartridge;

[0010] The temperature control device comprises a heat exchanger and a temperature sensor, the heat exchanger is connected with the tank body and is used for controlling the temperature of the liquid in the tank body, and the temperature sensor is arranged in the tank body and is used for detecting the temperature of the liquid in the tank body.

[0011] Further, the upper end of the tank body is open and detachably fixedly connected with an upper end cover, a liquid adding pipe and an exhaust pipe are arranged above the upper end cover, and first and second switch valves are arranged on the liquid adding pipe and the exhaust pipe respectively.

[0012] Further, the lower part of the tank body is further connected with a blowdown pipe, and a third switch valve is arranged on the blowdown pipe.

[0013] Further, the liquid inlet pipe is further connected with a cleaning pump, the water outlet of the cleaning pump is connected with the liquid inlet pipe through a connecting pipe, and fourth and fifth switch valves are arranged on the connecting pipe and the liquid inlet pipe respectively, and the fifth switch valve is located on the side far away from the tank body and the connecting position of the connecting pipe and the liquid inlet pipe.

[0014] Further, the upper end surface of the filter cartridge is inclined and distributed, and is inclined upward from the end close to the liquid inlet pipe to the end far away from the liquid inlet pipe.

[0015] Further, the liquid inlet pipe is tangentially arranged with the inner wall of the tank body.

[0016] Further, the surface of the filter cartridge is coated with a polytetrafluoroethylene coating.

[0017] The beneficial effects of the utility model lie in:

[0018] 1. The filter cartridge is arranged in the inside of the siphon tank, the traditional pipeline filter is cancelled, the cleaning frequency of the filter is reduced, the inside of the siphon tank can be cleaned, and the safe and long-term operation of the centrifugal pump is ensured.

[0019] 2. The temperature adjusting device can adjust the temperature of the liquid in the tank body, the sewage or the dirty oil in the chemical industry is in a suitable temperature range, the liquid viscosity is reduced, the high molecular impurity flocculation is inhibited, the inorganic salt precipitation is prevented, and the oil-water emulsification state is broken or the layering is promoted, so that the filter cartridge blocking risk is effectively reduced, and the filtering efficiency is improved.

[0020] 3. The inlet pipe of the siphon tank body is tangentially arranged with the inner wall of the tank body, which can make the liquid form a rotating flow in the tank, the centrifugal force generated by the rotation can throw the heavier particle impurities to the inner wall of the tank, reduce the impact of the flocculation on the filter cartridge and the accumulation on the surface of the filter cartridge, and the disturbance generated by the tangential flow of the fluid can reduce the adhesion of the flocculation or strip the adhered substances, which has a certain cleaning effect on the filter cartridge;

[0021] 4. The polytetrafluoroethylene coating is arranged on the surface of the filter cartridge, which can reduce the adhesion of the flocculation under low temperature conditions, thereby prolonging the operation cycle of the equipment, reducing the maintenance frequency and cost;

[0022] 5. The filter cartridge is detachably fixedly connected with the tank body, and cooperates with the cleaning pump and the blowdown pipe to effectively clean the overall structure, which is convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structure schematic view of the first embodiment of the utility model

[0024] Figure 2 It is a structure schematic view of the second embodiment of the utility model

[0025] Among them:

[0026] 1-tank body, 2-centrifugal pump, 3-filter cartridge, 4-inlet pipe, 5-liquid outlet pipe, 6-upper end cover, 7-liquid inlet pipe, 8-exhaust pipe, 9-first switch valve, 10-second switch valve, 11-bracket, 12-heat exchanger, 13-temperature sensor, 14-sewage tank, 15-blowdown pipe, 16-third switch valve, 17-cleaning pump, 18-connection pipe, 19-fourth switch valve, 20-fifth switch valve. DETAILED DESCRIPTION

[0027] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art.

[0028] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the view direction or positional relationship, and is only for the convenience of describing the utility model, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0029] AsFigure 1 The siphon tank with filtering function shown comprises a tank body 1, a centrifugal pump 2, a filter cartridge 3, and a temperature control device, the centrifugal pump 2 is connected with a liquid discharge pipe 5 of the tank body 1, the filter cartridge 3 is detachably arranged in the tank body 1 to filter sewage, and the liquid in the tank body 1 is subjected to temperature adjustment by the temperature control device to avoid that the filtering effect is affected due to excessively high or low temperature.

[0030] Specifically, the tank body 1 is a shell structure with an open upper end, an upper portion and a lower portion of the tank body 1 are respectively connected with a liquid inlet pipe 4 and the liquid discharge pipe 5, one end of the liquid inlet pipe 4 extends into the sewage tank 14, and the liquid discharge pipe 5 is connected with one end of a water inlet of the centrifugal pump 2; a flange cover is fixedly connected with an upper end of the tank body 1, an upper end cover 6 is detachably fixedly connected with the flange cover of the tank body 1 through flanges, a liquid adding pipe 7 and an exhaust pipe 8 are arranged on the upper end cover 6, and a first on-off valve 9 and a second on-off valve 10 are respectively arranged on the liquid adding pipe 7 and the exhaust pipe 8, the liquid adding pipe 7 is used for adding liquid into the tank body 1, and the exhaust pipe 8 is used for discharging air in the tank before work to make the tank body 1 full of liquid, both of them are conventional structures of the siphon tank, thus, no more redundant description is made; a sewage discharge pipe 15 is further connected with the lower portion of the tank body 1, the third on-off valve 16 is arranged on the sewage discharge pipe 15, and the sewage discharge pipe 15 is arranged to facilitate discharge of impurities filtered in the tank body 1 and discharge of sewage during cleaning.

[0031] The filter cartridge 3 is a closed shell structure, a plurality of groups of filtering holes are arranged on the circumferential direction side wall and the upper and lower end faces of the filter cartridge 3, the filter cartridge 3 is detachably fixedly connected with the inner wall of the tank body 1 through a support 11, and a gap is distributed between the filter cartridge 3 and the inner wall of the tank body 1, one end of the liquid discharge pipe 5 extends into the tank body 1 and communicates with the inside of the filter cartridge 3, so that the liquid in the tank body 1 enters the centrifugal pump 2 after being filtered through the filter cartridge 3; in order to improve the filtering effect, in the embodiment, the upper end face of the filter cartridge 3 is arranged in an inclined distribution form, as shown in Figure 1 The left end of the filter cartridge 3 is lower than the right end, that is, the left end of the filter cartridge 3 close to the connection between the liquid inlet pipe 4 and the tank body 1, so as to facilitate full contact between the sewage or sewage oil entering the tank body 1 from the liquid inlet pipe 4 and the upper end face of the filter cartridge 3, and the impurities or flocculent substances filtered can slide to the bottom of the tank body 1 or the gap between the tank body 1 and the filter cartridge 3 under the action of gravity, so as to avoid that the impurities or flocculent substances block the upper end face of the filter cartridge 3.

[0032] The temperature adjusting device comprises a heat exchanger 12 and a temperature sensor 13. The heat exchanger 12 is a jacketed heat exchanger in this embodiment, which is fixed to the outer wall of the tank body 1. The temperature sensor 13 is arranged at the middle position of the inner side wall of the tank body 1. The temperature sensor 13 detects the temperature of the liquid inside the tank body 1. According to the actual situation, a temperature threshold value is preset. In general, for sewage liquid, the temperature threshold value is set to 30-50℃. For oily or viscous liquid, the temperature threshold value is set to 40-70℃. When the detected liquid temperature is higher or lower than the temperature threshold value, the heat exchanger 12 is used to control the temperature of the liquid inside the tank body 1 to keep it within a reasonable range. By controlling the temperature of the liquid inside the tank body 1, the continuous operation time can be effectively prolonged, and the cleaning frequency can be reduced.

[0033] After the temperature of most chemical wastewater / oily wastewater increases, the molecular motion accelerates, the fluid viscosity significantly decreases, and the fluid is more easily passed through the filter screen pores. By controlling the temperature of the liquid, the viscosity of the liquid can be reduced, the flowability can be enhanced, the filtration resistance can be reduced, and the filtration efficiency can be improved. For high-molecular polymers such as PAM and lipids in the liquid, the chain segment activity is poor at low temperature, and the chain segments are easily tangled and aggregated into flocculation. However, the chain segment flexibility can be increased and the aggregation behavior can be reduced by increasing the temperature, so that the flocculation of high-molecular impurities can be inhibited, the formation of flocculation can be reduced, and the probability of filter screen blockage can be reduced. For most inorganic salts (such as CaSO4 and Na2SO4), the solubility decreases at low temperature, and the supersaturated salt is precipitated in the form of crystals. By increasing the temperature, the salt can be kept in a dissolved state to avoid the formation of solid crystals to block the filter screen, so that the crystallization and deposition of the salt can be delayed, and the inorganic salt can be prevented from being precipitated to block the filter screen. In addition, for some emulsified waste liquid, phase separation can occur under suitable temperature conditions. By increasing the temperature, the oil droplets in the emulsion are combined to become large, which is easily separated from the water layer. By adjusting the temperature, the oil-water emulsion state can be broken or the separation of the oil and water can be promoted, the oil-water separation effect can be improved, and the emulsion can be prevented from blocking the filter screen pores.

[0034] In this embodiment, the inlet pipe 4 is tangentially distributed with the tank body 1, so that the liquid entering the tank body 1 forms a rotating flow in the tank. The centrifugal force generated by the rotation throws the particles with large density or particle size to the tank wall, reduces the collision of the flocculation with the filter cartridge 3 and the accumulation on the surface of the filter cartridge 3. At the same time, the disturbance caused by the tangential flow of the fluid can reduce the adhesion of the flocculation to a certain extent or strip the already adhered substances, which has a certain cleaning effect on the filter cartridge 3.

[0035] In order to further reduce the adhesion of the flocculation or filtration impurities, the inner and outer surfaces of the filter cartridge 3 are coated with a polytetrafluoroethylene (PTFE) coating. By arranging the PTFE coating on the surface of the filter cartridge 3, the adhesion of the flocculation under low temperature conditions can be significantly reduced, so that the operation cycle of the equipment can be prolonged, and the maintenance frequency and cost can be reduced.

[0036] Second embodiment

[0037] The embodiment is based on the first embodiment, and a cleaning device is added, specifically, as shown in Figure 2 The cleaning device includes a cleaning pump 17, a connecting pipe 18, a fourth switch valve 19 and a fifth switch valve 20. The two ends of the connecting pipe 18 are respectively connected with a water outlet of the cleaning pump 17 and the liquid inlet pipe 4. The liquid inlet of the cleaning pump 17 is connected with an external cleaning liquid tank. The fourth switch valve 19 is arranged on the connecting pipe 18. The fifth switch valve 20 is arranged on the liquid inlet pipe 4, and the fifth switch valve 20 is away from the tank body 1 on the side where the connecting pipe 18 is connected with the liquid inlet pipe 4.

[0038] When the device needs to be cleaned, the upper end cover 6 is removed, the filter cartridge 3 is taken out, the filter cartridge 3 is cleaned, the fourth switch valve 19 is opened, and the fifth switch valve 20 is closed. The cleaning pump 17 and the connecting pipe 18 are used to inject cleaning liquid into the tank body 1 to clean the inner wall of the tank body 1. After cleaning, the sewage is discharged through the sewage pipe 15.

[0039] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements can be made, and these improvements should also be considered as the protection scope of the present application.

Claims

1. A siphon can having a filtering function, characterized by, The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter.

2. The siphon can with a filtering function according to claim 1, characterized in that, The application relates to a liquid filter.

3. The siphon can with a filtering function according to claim 1, characterized in that, The application relates to a liquid filter.

4. The siphon can with filtering function according to claim 1, characterized in that, The application relates to a liquid filter.

5. The siphon can with filtering function according to claim 1, characterized in that, The application relates to a liquid filter.

6. The siphon can with filtering function according to claim 1, characterized in that, The application relates to a liquid filter.

7. The siphon can with filtering function according to claim 1, characterized in that, The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter. The application relates to a liquid filter.

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