Protection device for filtering mechanism of pipeline type direct drinking water system

Abstract

The utility model discloses a protection device for a filtering mechanism of a pipeline type direct drinking water system, relates to the technical field of design and manufacture of direct drinking water making equipment, and aims to solve the problem that an existing direct drinking water system cannot accurately control water replenishing. The device comprises a softening regeneration control valve group, a pretreatment system multi-pressure-difference protection mechanism and an active carbon filter protection mechanism, the softening regeneration control valve group comprises a water replenishing pump, a water replenishing valve, a salt box, a water level sensor and a liquid level switch; the liquid level switch is arranged between the water replenishing valve and the water replenishing pipe and replenishes water into the salt tank through the water replenishing pipe; the multi-pressure-difference protection mechanism of the pretreatment system comprises a first filtering tank and a second filtering tank, and pressure detectors are arranged in front of and behind the first filtering tank and the second filtering tank respectively; the activated carbon filter protection mechanism comprises an activated carbon filter, a front ORP sensor arranged at the front end of the activated carbon filter and a rear ORP sensor arranged at the rear end of the activated carbon filter.

Description

Technical Field

[0001] The invention discloses a protection device for a filter mechanism of a pipeline direct drinking water system, which is used for protecting filter facilities of pipeline direct drinking water and relates to the technical field of design and manufacture of direct drinking water making equipment. Background Art

[0002] Pipeline direct drinking water equipment mainly includes multi-media filters, activated carbon filters, softeners, precision filters, ultrafiltration devices, nanofiltration devices, sterile water tanks, return water filters, ozone generators, ultraviolet sterilizers, automatic control systems, and related pipes, valves, pressure gauges, control equipment and other accessories. In order to ensure good water quality, the raw water treatment system is mainly a filtration system that generally includes multi-media, activated carbon, softening, security filtration, ultrafiltration, nanofiltration, ozone, ultraviolet sterilization, precision filtration and other twelve processes. Through layer-by-layer filtration, impurities, rust, odor, bacteria, microorganisms, heavy metals and other harmful pollutants in the water are removed to ensure that the water quality is better than the national direct drinking water standard and is suitable for drinking and cooking at home. However, there are the following main defects in these current filtration and detection systems:

[0003] 1. The existing softening filter is equipped with a multi-function valve to control the salt tank water replenishment. During the salt tank water replenishment process, the system will suspend water production, which will occupy the normal water production operation time of the system. In addition, there is no water level sensor in the existing salt tank, and it is impossible to monitor and display real-time liquid level related information, which easily leads to insufficient salt tank water replenishment and the inability to accurately control the water replenishment amount;

[0004] 2. The pretreatment system used in the prior art has the following shortcomings:

[0005] 1 Because the water volume and water pressure used for backwashing / forward washing are consistent with the water production process, there are problems of incomplete cleaning and poor effect. In addition, the existing pretreatment system adopts a quartz sand filter and an activated carbon filter in series. Therefore, the subsequent filter cleaning water comes from the produced water of the pre-filtration. Only when the pre-filter multi-media filter is backwashed and the produced water is put into the subsequent activated carbon filter can it be backwashed.

[0006] 2 The existing pretreatment system uses time or flow to control the cleaning process. This is a relatively vague empirical value method that cannot guarantee the cleanliness level achieved after the pretreatment system is cleaned. It is easy to cause incomplete cleaning and reduce the service life of the filter element.

[0007] 3. In the drinking water industry, activated carbon is mainly used to adsorb and remove residual chlorine in tap water due to water disinfection at water plants, so as to ensure that subsequent membrane elements are not damaged by oxidation. However, as the use time accumulates, the adsorption capacity of activated carbon gradually becomes saturated and it can no longer function. This transformation cannot be restored by isotopic treatment methods such as backwashing, and can only be replaced regularly and treated externally. The existing technology lacks the necessary operation monitoring means, and most of them set a replacement cycle based on experience. However, the reality is often that the adsorption activity of activated carbon is inseparable from the quality of raw water. Fluctuations and changes in water quality cause deviations in the traditional empirical replacement cycle, which is either too long to affect the treatment effect or too short to increase operation and maintenance costs. Utility Model Content

[0008] In view of the shortcomings of the prior art, the utility model sets a set of protection mechanisms in the filter mechanism of the pipeline direct drinking water system, including a softening and regeneration control valve group, a pretreatment system multi-pressure difference protection mechanism, and an activated carbon filter protection mechanism;

[0009] The softening regeneration control valve group includes a water supply pump, a water supply valve, a salt box, a water level sensor and a liquid level switch;

[0010] The liquid level switch is arranged between the water supply valve and the water supply pipe, and water is supplied to the salt box through the water supply pipe;

[0011] A water level sensor is arranged in the salt box, and the water level sensor is connected to the PLC processor through a wire, and the PLC processor determines the liquid level in the salt box and performs accurate replenishment;

[0012] The multi-pressure differential protection mechanism of the pretreatment system includes a first filter tank and a second filter tank, and a pressure detector is respectively arranged before and after the first filter tank and the second filter tank, and the pressure detector includes a first filter tank front detector arranged at the front end of the first filter tank and a first filter tank rear detector arranged at the rear end of the first filter tank, and a second filter tank front detector and a second filter tank rear detector arranged at the front end of the second filter tank;

[0013] The detectors at the front and rear ends of the first filter tank and the detectors at the front and rear ends of the second filter tank are connected to the PLC processor by wires;

[0014] The activated carbon filter protection mechanism includes an activated carbon filter, and a front ORP sensor arranged at the front end of the activated carbon filter and a rear ORP sensor arranged at the rear end, wherein the front ORP sensor and the rear ORP sensor are connected to a PLC processor by a wire, and the PLC processor is connected to a display screen, and an input button is arranged on the display screen;

[0015] Preferably: the activated carbon filter may also be a quartz sand filter or other physical filters.

[0016] Technical effects of the utility model:

[0017] 1. The softening filter is equipped with a set of water supply valves and liquid level switches, which are separated from the pretreatment system and run independently. This can realize PLC precise control of water supply, reduce equipment idle time, and the operating status can be checked in real time, making the operation more reliable and safer;

[0018] 2. The multi-pressure differential design of the pretreatment system adds a pressure detection device before and after each filter tank. By collecting the operating pressure, the operating pressure differential of each tank is obtained after a simple calculation by PLC, which is used to reflect the operation of the filtration system and can also be used as a trigger condition for cleaning the filter tank. Cleaning is performed only after reaching the limit value, which overcomes the traditional cleaning method based on operating time and experience. The multi-pressure differential design adopted by the utility model can show the law that the operating pressure differential is proportional to the degree of filter element blockage, which can reflect the service life of the filter element, and remind real-time inspection and timely replacement, so that water quality can be guaranteed;

[0019] 3. Adding an ORP sensor after the activated carbon filter can monitor the activity of the activated carbon filter material throughout the entire process. By adding an ORP sensor, namely an "oxidation-reduction potential sensor", at the water inlet and outlet of the activated carbon filter, the changes in ORP values ​​before and after filtration can be compared to visually reflect the quality of the activated carbon adsorption activity, which can be used to accurately determine the replacement cycle of consumables. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the process connection of the protection mechanism in the filtering mechanism of the utility model.

[0021] In the figure:

[0022] Display screen-1, PLC processor-2, water supply pump-3, salt tank water outlet-4, water supply valve-5, water level sensor-6, salt tank-7, water supply pipe-8, liquid level switch-9, connecting wire-10, filter tank water outlet-11, first filter tank rear end detector-12, first filter tank-13, first filter tank front end detector-14, pretreatment system pressure difference protection water inlet-15, second filter tank rear end detector-16, second filter tank-17, second filter tank front end detector-18, activated carbon filter water outlet-19, rear ORP sensor-20, activated carbon filter-21, front ORP sensor-22, filter water inlet pipe-23; DETAILED DESCRIPTION

[0023] The specific embodiments of the present invention are given below:

[0024] The utility model comprises a softening regeneration control valve group, a pretreatment system multi-pressure difference protection mechanism, and an activated carbon filter protection mechanism;

[0025] Example 1: Softening regeneration control valve group

[0026] The softening regeneration control valve group adopts a PLC processor to control the metering pump to accurately and regularly add quantitatively, which can ensure that the resin is regenerated thoroughly and the regeneration effect is stable and accurate; it includes a water supply pump 3, a water supply valve 5, a salt box 7, a water level sensor 6, and a liquid level switch 9;

[0027] The liquid level switch 9 is arranged between the water supply valve 5 and the water supply pipe 8, and water is supplied to the salt box 7 through the water supply pipe 7;

[0028] A water level sensor 6 is provided in the salt box 7, and the water level sensor 6 is connected to the PLC processor 2 through a wire, and the PLC processor 2 determines the liquid level in the salt box 7 and performs accurate replenishment;

[0029] A set of water supply valve groups and liquid level switches are configured in the softening regeneration filter process. These valve groups are separated from the pretreatment system and operate independently. The water supply is accurately controlled by the PLC processor, which can reduce the idle time of the equipment. At the same time, the operating status can be checked in real time, making the operation more reliable and safe;

[0030] Example 2: Pretreatment system multi-pressure differential protection mechanism

[0031] The multi-pressure differential protection mechanism of the pretreatment system includes a pressure detector arranged at the front and rear of the first filter tank 13 and the second filter tank 17, respectively. The pressure detector includes a first filter tank front detector 14 arranged at the front end of the first filter tank 13 and a first filter tank rear detector 12 arranged at the rear end of the first filter tank 13, as well as a second filter tank front detector 18 and a second filter tank rear detector 16 arranged at the front end of the second filter tank 17;

[0032] The detectors 14 and 12 at the front and rear ends of the first filter tank 13 and the detectors 18 and 16 at the front and rear ends of the second filter tank 17 are connected to the PLC processor 2 by wires;

[0033] In the multi-pressure differential protection mechanism process of the pretreatment system, a pressure detection device is added before and after each filter tank. The operating pressure can be collected and the operating pressure differential of each tank can be obtained after a simple calculation by the PLC processor to reflect the operation of the filtration system and can also be used as a trigger condition for cleaning the filter tank. Cleaning is performed only after the limit value is reached. This solves the problem of traditional cleaning based on operating time and experience. In addition, according to the law that the operating pressure differential is proportional to the degree of filter element blockage, the service life of the filter element can be reflected, and real-time reminders can be given to check and replace in time, so that water quality is guaranteed.

[0034] Example 3: Activated carbon filter protection mechanism

[0035] The activated carbon filter protection mechanism includes an activated carbon filter 21, and a front ORP sensor 22 arranged at the front end of the activated carbon filter 21 and a rear ORP sensor 20 arranged at the rear end, the front ORP sensor 22 and the rear ORP sensor 20 are connected to a PLC processor 2 by a wire, and the PLC processor 2 is connected to a display screen 1, and an input button is arranged on the display screen 1;

[0036] The activated carbon filter 21 may also be a quartz sand filter or other physical filters;

[0037] In the activated carbon filter protection process, by adding ORP sensors at the water inlet and outlet of the activated carbon filter, by comparing the changes in ORP values ​​before and after filtration, the quality of the activated carbon adsorption activity can be intuitively reflected, so as to accurately determine the replacement cycle of consumables;

[0038] The principle of this method is to use an ORP sensor, namely an "oxidation-reduction potential numerical sensor", which can reflect the macroscopic redox properties of all dissolved substances in the water body. The higher the value, the stronger the oxidizing property, and the lower the value, the stronger the reducing property. The raw water treated by the direct drinking water industry is tap water with good water quality. There are very few impurities in the water body and the pollution components are single. Therefore, in the raw tap water, the main substance affecting the ORP value is the disinfection component residual chlorine, and this component is also the main indicator that the filter needs to adsorb and filter. Therefore, the adsorption activity of activated carbon can be directly linked to the numerical changes of residual chlorine in the inlet and outlet water, and then it can be quantified through the changes in ORP values.

[0039] It is further necessary to explain that the filter mechanism protection device of the pipeline direct drinking water system proposed in the utility model involves three main filter mechanism protection methods. The attached drawings are provided as reference schematic diagrams of the process flow, not installation or design drawings. The specific connection relationship of each component is familiar to ordinary technicians in this technical field, so it will not be repeated here;

[0040] The valves, switches, pipes, and electrical connection processes and methods involved in the present invention can be easily learned by ordinary technicians in the field of the present invention from the prior art, and there is no need to elaborate on them here.

[0041] The utility model adopts known components to make innovative designs for the defects of the prior art, and the innovative design of the utility model overcomes the deficiencies of the prior art and brings positive effects as described in the technical effect section of the specification;

[0042] Furthermore: The oxidation-reduction potential, i.e. ORP, mentioned in the specification is the abbreviation of Oxidation-Reduction Potential in English. ORP, as a medium, is a comprehensive indicator of environmental conditions including soil, natural water, culture medium, etc. It has been used for a long time. Its main task is to characterize the relative degree of oxidation or reduction of the medium. Therefore, it is a technical method well known to ordinary technicians in this technical field and will not be described in detail.

Claims

1. A filter mechanism protection device for a pipeline direct drinking water system, comprising a softening and regeneration control valve group, a pretreatment system multi-pressure differential protection mechanism and an activated carbon filter protection mechanism, characterized in that: The softening regeneration control valve group comprises a water supply pump (3), a water supply valve (5), a salt tank (7), a water level sensor (6) and a liquid level switch (9); The liquid level switch (9) is arranged between the water supply valve (5) and the water supply pipe (8), and water is supplied to the salt box (7) through the water supply pipe (8); The multi-pressure differential protection mechanism of the pretreatment system comprises a first filter tank (13) and a second filter tank (17), and a pressure detector is respectively arranged before and after the first filter tank (13) and the second filter tank (17); The activated carbon filter protection mechanism comprises an activated carbon filter (21), a front ORP sensor (22) arranged at the front end of the activated carbon filter (21), and a rear ORP sensor (20) arranged at the rear end.

2. A filter mechanism protection device for a pipeline direct drinking water system according to claim 1, characterized in that: A water level sensor (6) is arranged in the salt box (7), and the water level sensor (6) is connected to the PLC processor (2) via a wire, so that the PLC processor (2) determines the liquid level in the salt box (7) and performs accurate replenishment.

3. A filter mechanism protection device for a pipeline direct drinking water system according to claim 1, characterized in that: The pressure detector comprises a first filter tank front end detector (14) arranged at the front end of the first filter tank (13), a first filter tank rear end detector (12) arranged at the rear end of the first filter tank (13), a second filter tank front end detector (18) arranged at the front end of the second filter tank (17), and a second filter tank rear end detector (16) arranged at the rear end of the second filter tank (17).

4. A filter mechanism protection device for a pipeline direct drinking water system according to claim 3, characterized in that: The first filter tank front end detector (14), the first filter tank rear end detector (12), the second filter tank front end detector (18) and the second filter tank rear end detector (16) are all connected to the PLC processor (2) via wires.

5. A filter mechanism protection device for a pipeline direct drinking water system according to claim 1, characterized in that: The front ORP sensor (22) and the rear ORP sensor (20) are connected to the PLC processor (2) via wires.

6. A filter mechanism protection device for a pipeline direct drinking water system according to claim 5, characterized in that: The PLC processor (2) is connected to a display screen (1), and input buttons are provided on the display screen (1).

7. A filter mechanism protection device for a pipeline direct drinking water system according to claim 1, characterized in that: The activated carbon filter (21) is a quartz sand filter.

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