CN112811691A - Production method of hot spring direct drinking water capable of retaining beneficial trace elements - Google Patents
Production method of hot spring direct drinking water capable of retaining beneficial trace elements Download PDFInfo
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- CN112811691A CN112811691A CN202011622789.6A CN202011622789A CN112811691A CN 112811691 A CN112811691 A CN 112811691A CN 202011622789 A CN202011622789 A CN 202011622789A CN 112811691 A CN112811691 A CN 112811691A
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/583—Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing fluoride or fluorine compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal compounds
- C02F1/64—Heavy metal compounds of iron or manganese
Abstract
The invention provides a production method of hot spring direct drinking water capable of retaining beneficial trace elements, which comprises the following steps: the method comprises the steps of heat exchange, water storage, filtration, iron and manganese removal, fluorine removal, neutralization, water storage and disinfection. In one aspect of the application, MnO is carried by a polymer2The chelating resin iron and manganese removing agent is used as an iron and manganese removing material, the high-molecular iron and manganese removing material has a preferential adsorption effect on iron and manganese, the iron and manganese can be removed by controlling the treatment conditions to reach the drinking water standard, the influence on trace ions such as strontium and selenium is minimized, and more than 90% of beneficial trace ions in hot spring water can be reserved; on the other hand, the high molecular weight ZrO is adopted2Chelating resin defluorinating agents as a removerThe polymer fluorine removal material has a specific fluorine removal characteristic, removes fluorine ions within a certain reaction time and pH value range to reach the drinking water standard, and does not adsorb strontium selenium element, so that iron, manganese and fluorine in hot spring water can be removed, and beneficial trace elements can be prevented from being removed.
Description
Technical Field
The invention relates to the technical field of production of hot spring water rich in beneficial trace elements, in particular to a production method of hot spring direct drinking water capable of retaining beneficial trace elements.
Background
The hot spring water is rich in rich mineral substances, wherein beneficial trace elements in the hot spring water have extremely important physiological functions and health care functions for human bodies, and drinking the selenium-rich hot spring water has the effects of enhancing the immunologic function, protecting biological cell membranes, promoting blood circulation, preventing skin aging, reducing the carcinogenicity of carcinogenic substances, eliminating cancer cells mutated in vivo, preventing division and growth of the cancer cells and the like; drinking the strontium-rich hot spring water can reduce the cardiovascular morbidity and promote the development of bones and teeth; drinking the zinc-rich hot spring water can promote growth and development, tissue healing, enhance appetite, reduce cardiovascular diseases and the like.
The hot spring water is mostly natural underground mineral water, the elements of iron, manganese and fluorine are generally overproof, the hot spring water is in an underground anaerobic environment for years, so the hot spring water has a reduction characteristic, the iron and the manganese mostly exist in low-valence reduction state ions, and the fluorine exists in a fluorine ion form. Iron and manganese are metalloenzymes composed with proteins, and are one of the main catalysts in cellular enzymes, and are required to be taken in 12-15mg every day by adults. The adult takes manganese every day to participate in the formation of various enzymes, if excessive intake of manganese causes chronic poisoning, the iron content in the body exceeds the normal value by 10 times, the symptoms such as liver cirrhosis, osteoporosis, skin blackness and insulin reduction cause diabetes mellitus can be caused, and the excessive intake of manganese can also cause depression, hypomnesis and the like; and overproof fluorine can cause fluorine bone disease and serious disability. Therefore, the problem of iron, manganese and fluorine exceeding standards must be solved in the production process of the hot spring water rich in beneficial trace elements such as selenium, strontium and zinc. The inventor of the invention discovers, through research, how to ensure that beneficial trace elements can stably exist and cannot be removed when removing iron, manganese and fluorine in the production process of the hot spring water rich in the beneficial trace elements, and no corresponding process technology exists at present.
Disclosure of Invention
Aiming at the technical problems that in the production process of hot spring water rich in beneficial trace elements, iron, manganese and fluorine are removed, and the selenium element can be stably kept and cannot be removed, no corresponding process technology exists at present, the invention provides a production method of hot spring direct drinking water capable of keeping the beneficial trace elements.
In order to solve the technical problems, the invention adopts the following technical scheme:
a production method of hot spring direct drinking water capable of retaining beneficial trace elements comprises the following steps:
a heat exchange step: introducing hot spring water outlet water into a heat exchanger for heat exchange, and controlling the temperature of the hot spring water after heat exchange to be 20-40 ℃;
a water storage step: enabling the hot spring water after heat exchange to enter a raw water storage tank, wherein a water level controller is arranged in the raw water storage tank, and controlling the water level of the raw water storage tank to be 1-2 m through the water level controller;
and (3) filtering: hot spring water in a raw water storage tank is delivered into a quartz sand filter through a lifting pump, and the quartz sand filter is filled with SiO2The content of the desalted natural sea sand filter material is more than or equal to 98%, the particle size is 0.8-4.0 mm, the thickness of the filter material is 80-150 cm, the quartz sand filter adopts a top-in-bottom-out filtering mode, fed hot spring water is filtered by the natural sea sand filter material to remove suspended matters in the water, the filtering speed is controlled to be 4-10 BV, and the dissolved ions of the hot spring water are not changed after the desalted natural sea sand is filtered;
iron and manganese removal: the hot spring water filtered by the natural sea sand filter material automatically flows into a ferro-manganese remover filled with high polymer MnO with the thickness of 80-150 cm2The chelating resin ferromanganese remover has the advantages that the ferromanganese remover has preferential adsorption effect on ferromanganese and can remove ferromanganese ions without aeration, the ferromanganese remover adopts an upward-out filtering mode, and hot spring water fed into the ferromanganese remover is subjected to high-molecular MnO loading2Removing iron and manganese from the chelate resin, and controlling the filtration rate to be 4-15 BV so as to keep more than 90% of strontium selenium ions;
and (3) fluorine removal: allowing hot spring water subjected to iron and manganese removal to automatically flow into a fluorine ion exchanger, wherein the fluorine ion exchanger is filled with high-molecular-load ZrO with the thickness of 80-155 cm2The chelating resin defluorinating agent has high selective adsorbability only aiming at the directional removal of fluorine ions, the fluorine ion exchanger adopts an upper inlet and upper outlet water inlet mode to lead the fed hot spring water to pass through the high-molecular-load ZrO2Defluorination with chelating resinAfter adsorbing, directionally removing fluorine ions, controlling the filtration rate at 10-20 BV and the pH value at 5-8, so as to reduce the fluorine ions of 1-20 mg/l to below 1mg/l and keep the concentration of strontium ions above 90%; the fluorine ion exchanger is connected with a regeneration device, and the regeneration device is used for loading high-molecular ZrO into the fluorine ion exchanger2Delivering strong alkali solution to chelate resin defluorinating agent to enhance the high-molecular-weight ZrO2The adsorptivity of the chelating resin defluorinating agent ensures that the interior polymer carries ZrO2Regenerating the chelating resin defluorinating agent in a saturated state;
a neutralization step: enabling the defluorinated hot spring water to automatically flow into a neutralizing water tank, wherein a sulfuric acid adding device is connected to the neutralizing water tank, the sulfuric acid adding device comprises a sulfuric acid adding tank connected with the neutralizing water tank, a dosing pump is mounted on a pipeline connecting the sulfuric acid adding tank and the neutralizing water tank, a water outlet pipeline of the neutralizing water tank is connected with a water quality detector for detecting a pH value, the dosing pump controls the amount of sulfuric acid added into the neutralizing water tank according to the pH value detected by the water quality detector, and the pH value of the neutralized hot spring water on the water outlet pipeline of the neutralizing water tank is adjusted and controlled to be 5-7;
water storage step: enabling the neutralized hot spring water to automatically flow into a hot spring water storage tank, wherein the hot spring water storage tank is provided with a liquid level controller and an online ion detector, the liquid level controller is used for keeping the water level of the hot spring to change within a set range, the online ion detector is used for detecting fluorine, iron, manganese and various beneficial trace elements in the hot spring water in real time, and if the content of any ion exceeds the standard, the hot spring water enters an alarm state, and a water outlet pump and a water outlet valve are closed;
a disinfection step: and sterilizing the thermal spring water after the water storage reaches the standard by an ultraviolet disinfection lamp of an ultraviolet sterilizer, and enabling the thermal spring water after ultraviolet disinfection to enter a water consumption point.
Compared with the prior art, the production method of hot spring direct drinking water capable of retaining beneficial trace elements provided by the invention has the following advantages: 1. in the removal of suspended substances, SiO is used2The natural sea sand which is desalted and has the content of more than or equal to 98 percent, the particle size of 0.8-4.0 mm and the thickness of the filter material of 80-150 cm is used as the filter material, and the surface of the natural sea sand is more excellent after being compressed by ten thousand meters of sea waterThe added quartz sand is mellow, smooth and higher in density, has a longer service life of 3-8 weeks than common quartz sand, and almost has no influence on beneficial trace elements in hot spring water through natural sea sand filtration; 2. in the step of removing iron and manganese, high molecular MnO is adopted2The chelate resin is used as a ferro-manganese removing agent, does not need aeration oxidation, and carries MnO by high polymer2The iron and manganese ions are removed through the oxidation and physical interception of the chelating resin, and finally the iron and manganese ions are discharged into a municipal sewage pipe network through backwashing without a regeneration device, so that the investment of a regeneration medicament is reduced, and experiments prove that more than 90% of beneficial trace elements can be reserved and the iron and manganese ions within 10mg/l can be reduced to be within 0.3mg/l when the flow rate is 4-15 BV, so that the iron and manganese ions can be removed more efficiently, the influence on the trace elements can be minimized, and the iron and manganese ions can be removed from hot spring water while the beneficial trace elements are not lost in a large amount; 3. in the defluorination step, high molecular weight ZrO loaded2The chelating resin defluorinating agent is used as a defluorinating material, the high molecular defluorinating material has a specific defluorinating characteristic, namely, the high molecular defluorinating material only aims at the directional removal of fluorine ions and protects beneficial trace elements from being adsorbed, 1-20 mg/l of the fluorine ions can be reduced to be below 1mg/l, and the concentration of strontium ions can be kept to be above 90 percent, so that the defluorination can be ensured and the beneficial trace elements are not influenced; 4. the beneficial trace elements can be prevented from being removed while iron, manganese and fluorine are removed from the hot spring water, so that the quality of the effluent water is excellent, the effluent water reaching the standard is subjected to ultraviolet disinfection and then enters a water consumption point, and therefore, the standard of natural mineral water and the standard of drinking water are achieved, the standard content of mineral substances in the water is reserved, the hot spring water drinking device is sanitary, safe, beneficial to human health, and finally hot spring direct drinking is achieved.
Furthermore, a water outlet pipeline of the heat exchanger is connected with a temperature sensor, the output end of the temperature sensor is connected with a temperature control system, and the output end of the temperature control system is connected with a switch valve on an input pipeline of the heat exchanger.
Furthermore, a turbidity meter is arranged on a water outlet pipeline of the quartz sand filter, a filtering backwashing pipeline and a filtering sewage pipeline are connected to the water outlet pipeline of the quartz sand filter, one end of the filtering backwashing pipeline is connected with the water outlet pipeline of the thermal spring water storage tank through a backwashing pump set, the other end of the filtering backwashing pipeline is connected with one end of the filtering sewage pipeline through the water outlet pipeline of the quartz sand filter, and the other end of the filtering sewage pipeline is close to an outdoor sewage well.
Further, be equipped with the ferro-manganese ion detector on the outlet conduit of ferromanganese removal ware, be connected with ferro-manganese removal back flush pipeline and ferro-manganese removal sewage pipeline on the outlet conduit of ferromanganese removal ware, the one end of ferro-manganese removal back flush pipeline is connected with the outlet conduit of hot spring water storage box through back flush pump package, and the other end is connected with the ferro-manganese removal ware through ferro-manganese removal ware outlet conduit, be connected with first recoil switch valve near ferro-manganese removal ware outlet conduit on the ferro-manganese removal back flush pipeline, the one end of ferro-manganese removal sewage pipeline is connected with the drain of ferro-manganese removal ware, and the other end is nearly connected with outdoor sewage well, and the back flush intensity is controlled at 16 ~ 20L/s.m2And controlling the back washing time to be 8-12 min.
Further, be equipped with the fluorine ion detector on fluorine ion exchanger's the outlet conduit, be connected with defluorination back flush pipeline and sewage pipes on fluorine ion exchanger's the outlet conduit, defluorination back flush pipeline's one end is connected with the outlet conduit of thermal spring water storage box through back flush pump package, and the other end is connected with fluorine ion exchanger through fluorine ion exchanger outlet conduit, be close to fluorine ion exchanger outlet conduit department on the defluorination back flush pipeline and be connected with the second recoil switch valve, the one end of sewage pipes is connected with fluorine ion exchanger's drain, and another termination back flush fluorine ion processing apparatus, and the back flush velocity of flow is controlled at 3 ~ 5BV, and back flush time control is in 30 ~ 60 min.
Furthermore, the fluorine ion exchanger is also connected with an acid liquor medicine box through an acid liquor delivery pipeline, strong acid solution is stored in the acid liquor medicine box, and an acid liquor delivery pump is connected to the acid liquor delivery pipeline.
Further, the backwashing fluoride ion treatment device comprises an integrated fluoride precipitation device, a pneumatic diaphragm pump and a plate-and-frame filter press which are sequentially connected, calcium oxide is firstly added into the integrated fluoride precipitation device to precipitate fluoride ions, the ratio of the calcium oxide dosage to the fluorine content in water is 20-30: 1, then positively charged modified nano iron is added, and the ratio of the modified nano iron dosage to the fluorine content in water is 10-20: 1; and (3) treating the backwashing fluoride ions by calcium oxide and modified nano iron, precipitating for 1-2 hours, and finally conveying the fluorine-containing precipitate to a plate-and-frame filter press by a pneumatic diaphragm pump for filter pressing to remove the fluorine-containing precipitate as solid waste.
Further, regenerating unit is including the alkali lye medical kit that holds strong alkaline solution, be connected with alkali lye on the alkali lye medical kit and throw in the pipeline, the other end that the pipeline was thrown in to alkali lye is connected with fluorine ion exchanger, be connected with alkali lye on the alkali lye delivery pipeline and throw in the pump, the regeneration cycle is 38 ~ 40h, and the regeneration velocity of flow is 1.5 ~ 2.5BV, and the regeneration time is 60 ~ 120 min.
Further, the strong alkaline solution contained in the alkali liquor medicine chest is 1-10% of sodium hydroxide solution.
Furthermore, the main material of the ultraviolet sterilizer is made of stainless steel.
Drawings
FIG. 1 is a schematic flow chart of a production method of hot spring direct drinking water capable of retaining beneficial trace elements provided by the invention.
FIG. 2 is a graph showing the variation of strontium ion concentration of the effluent with the filtration rate after the removal of iron and manganese.
FIG. 3 is a graph showing the variation of the concentration of iron ions in the effluent with the filtering speed after the removal of iron and manganese.
FIG. 4 is a graph showing the variation of strontium ion concentration of the effluent after fluorine removal according to the present invention.
FIG. 5 is a graph showing the fluorine ion concentration of the effluent water after fluorine removal according to the present invention, which varies with the filtration rate.
In the figure, 1, a heat exchanger; 11. a temperature sensor; 12. a temperature control system; 13. an on-off valve; 2. a raw water storage tank; 21. a water level controller; 3. lifting a pump group; 4. a quartz sand filter; 41. a filtering and backwashing pipeline; 42. filtering the sewage pipeline; 5. a ferro-manganese remover; 51. removing iron and manganese from the back washing pipeline; 52. a sewage pipeline for removing iron and manganese; 53. a first recoil switch valve; 6. a fluorine ion exchanger; 61. defluorination back flushing pipeline; 62. a blowdown line; 63. a second recoil switch valve; 64. delivering the acid liquor to a pipeline; 65. an acid liquor box; 7. a regeneration device; 71. a lye tank; 72. an alkali liquor delivery pipeline; 8. a neutralization water tank; 9. a sulfuric acid feeding device; 91. a sulfuric acid adding box; 92. a dosing pump; 93. a water quality detector; 10. a hot spring water storage tank; 101. a liquid level controller; 30. an ultraviolet sterilizer; 40. a backwash pump unit; 50. backwashing the fluorine ion treatment device; 501. an integrated fluorine precipitation apparatus; 502. a pneumatic diaphragm pump; 503. and (4) a plate-and-frame filter press.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
Referring to fig. 1 to 5, the present invention provides a method for producing hot spring direct drinking water capable of retaining beneficial trace elements, comprising the following steps:
a heat exchange step: the hot spring water outlet is connected into a heat exchanger 1 for heat exchange, the temperature of the hot spring water after heat exchange is controlled to be 20-40 ℃, and the heat exchanger 1 can be realized by using the existing plate heat exchanger;
a water storage step: the hot spring water after heat exchange enters a raw water storage tank 2, a water level controller 21 is arranged in the raw water storage tank 2, and the water level of the raw water storage tank is controlled to be 1-2 m through the water level controller 21 so as to ensure the stable water quantity of subsequent equipment; the raw water storage tank 2 is provided with two lifting pump groups 3 to provide sufficient power for subsequent water treatment equipment and ensure the normal operation of the equipment;
and (3) filtering: hot spring water in a raw water storage tank 2 is sent to a quartz sand filter 4 through a lifting pump group 3, and the quartz sand filter 4 is filled with SiO2The desalted natural sea sand filter material is characterized by comprising more than or equal to 98 percent of desalted natural sea sand filter material, the particle size of the desalted natural sea sand filter material is 0.8-4.0 mm, the thickness of the filter material is 80-150 cm, the natural sea sand filter is more efficient, and the service cycle of the natural sea sand filter material is 3-8 times longer than that of common quartz sand; the quartz sand filter 4 adopts a filtering mode of top inlet and bottom outlet, the fed hot spring water is filtered by a natural sea sand filter material to remove suspended matters in the water, the filtering speed is controlled to be 4-10 BV, and the dissolved ions of the hot spring water are not changed after the natural sea sand is desalted and filtered;
iron and manganese removal: the hot spring water filtered by the natural sea sand filter material automatically flows into a ferro-manganese remover 5, wherein the ferro-manganese remover 5 is filled with high polymer MnO with the thickness of 80-150 cm2The chelating resin ferromanganese remover has the advantages that the ferromanganese remover has preferential adsorption effect on ferromanganese and can remove ferromanganese ions without aeration, namely the ferromanganese remover has good ferromanganese selective removal effect, the ferromanganese remover 5 adopts an upper-in and upper-out filtering mode, and hot spring water fed into the ferromanganese remover is subjected to high-molecular MnO loading2Removing iron and manganese by chelating resin, controlling the removal rate of the iron and manganese by controlling the residence time of hot spring water in an iron and manganese remover 5, protecting beneficial trace elements from being removed, controlling the filtration rate to be 4-15 BV so as to keep more than 90% of strontium and selenium ions, and specifically, controlling the concentration of strontium ions in effluent and the concentration of iron ions in the effluent along with the change curve graphs of the filtration rate after removing the iron and manganese as shown in figures 2 and 3 respectively, so that the iron and manganese remover 5 controls the filtration rate through the concentration of the iron and manganese ions, and ensures that the beneficial trace elements are influenced the minimum; the iron and manganese removing device 5 does not need a regeneration treatment device, and can recover the removing effect only by regular back washing; the specific iron and manganese removing high molecular resin adopts a special process to chelate and modify common polystyrene framework resin, and modified MnO2The chelate resin has oxidability to ferro-manganese, can selectively remove ferro-manganese ions, and can reduce the loss of other beneficial trace elements by changing the conditions such as filtration rate and the like;
and (3) fluorine removal: letThe hot spring water after iron and manganese removal automatically flows into a fluorine ion exchanger 6, and the fluorine ion exchanger 6 is filled with high-molecular-load ZrO with the thickness of 80-155 cm2The chelating resin defluorinating agent has fluorine ion adsorbing capacity of 5g/l, and features high selective adsorption and directional elimination of fluorine ion, and the fluorine ion exchanger 6 has upper water inlet and upper water outlet to introduce hot spring water with high molecular weight ZrO loaded2After adsorption, the chelating resin defluorinating agent is used for directionally removing fluorine ions, the filtering speed is controlled to be 10-20 BV, the pH value is 5-8, so that 1-20 mg/l of the fluorine ions are reduced to be below 1mg/l, the strontium ion concentration is kept above 90%, and the specific defluorination outlet water strontium ion concentration and outlet water fluorine ion concentration change curves along with the filtering speed are respectively shown in figures 4 and 5; the fluorine ion exchanger 6 is connected with a regeneration device 7, and the regeneration device 7 is used for loading high molecular weight ZrO into the fluorine ion exchanger 62Delivering strong alkali solution to chelate resin defluorinating agent to enhance the high-molecular-weight ZrO2The adsorptivity of the chelating resin defluorinating agent ensures that the interior polymer carries ZrO2Regenerating the chelating resin defluorinating agent in a saturated state;
a neutralization step: enabling the defluorinated hot spring water to automatically flow into a neutralizing water tank 8, wherein a sulfuric acid adding device 9 is connected to the neutralizing water tank 8, the sulfuric acid adding device 9 comprises a sulfuric acid adding tank 91 connected with the neutralizing water tank 8, a dosing pump 92 is installed on a pipeline connecting the sulfuric acid adding tank 91 and the neutralizing water tank 8, a water outlet pipeline of the neutralizing water tank 8 is connected with a water quality detector 93 for detecting a pH value, the dosing pump 92 controls the amount of sulfuric acid added into the neutralizing water tank 8 according to the pH value detected by the water quality detector 93, and the pH value of the neutralized hot spring water on the water outlet pipeline of the neutralizing water tank 8 is adjusted and controlled to be 5-7; specifically, because of the high molecular-weight-carried ZrO2The chelating resin exchange mechanism is that the fluorine ions and hydroxyl ions are subjected to ion exchange, so that the pH value of the outlet water output to the neutralizing water tank 8 by the fluorine ion exchanger 6 is slightly increased, the pH value on the outlet water pipeline of the neutralizing water tank 8 is detected by the water quality detector 93, if the pH value is higher than a set value, an instruction is output to the dosing pump 92, the dosing pump 92 is started to dose the sulfuric acid solution in the sulfuric acid dosing tank 91 to the neutralizing water tank 8 for neutralization, and the neutralization is reducedAnd the effluent pH value of the water tank 8;
water storage step: the neutralized hot spring water automatically flows into a hot spring water storage tank 10, a liquid level controller 101 and an online ion detector (not shown) are arranged on the hot spring water storage tank 10, the water level of the hot spring is kept to change within a set range by the liquid level controller 101 so as to avoid full water overflow or low water level water pump operation, and the structure and the working principle of the liquid level controller 101 are the prior art well known to those skilled in the art and are not described herein; detecting fluorine, iron, manganese and various beneficial trace elements in hot spring water in real time by an online ion detector, judging the content of detected ions by a system PLC (programmable logic controller), entering an alarm state if any ion content exceeds the standard, and closing a water outlet pump and a water outlet valve;
a disinfection step: the thermal spring water after reaching the standard is disinfected and sterilized by an ultraviolet disinfection lamp of the ultraviolet disinfector 30, and the thermal spring water after being disinfected by ultraviolet enters a water consumption point.
Compared with the prior art, the production method of hot spring direct drinking water capable of retaining beneficial trace elements provided by the invention has the following advantages: 1. in the removal of suspended substances, SiO is used2The desalted natural sea sand with the content of more than or equal to 98 percent, the particle size of 0.8-4.0 mm and the thickness of the filter material of 80-150 cm is used as the filter material, the surface of the natural sea sand is more round and smooth and has higher density after being compressed by ten thousand meters of seawater, the service cycle is 3-8 weeks longer than that of common quartz sand, and the natural sea sand is filtered to hardly affect beneficial trace elements in hot spring water; 2. in the step of removing iron and manganese, high molecular MnO is adopted2The chelate resin is used as a ferro-manganese removing agent, does not need aeration oxidation, and carries MnO by high polymer2The iron and manganese ions are removed through oxidation and physical interception of chelate resin, and finally the iron and manganese ions are discharged into a municipal sewage pipe network through backwashing without a regeneration device, so that the investment of regeneration medicaments is reduced, and experiments prove that more than 90% of beneficial trace elements can be reserved and the iron and manganese ions within 10mg/l can be reduced to be within 0.3mg/l when the flow rate is 4-15 BV, so that the iron and manganese ions can be more efficiently removed, the influence on the trace elements can be reduced to the minimum, and the iron and manganese ions are not removed while hot spring water is subjected to iron and manganese removalA great amount of beneficial trace elements are lost; 3. in the defluorination step, high molecular weight ZrO loaded2The chelating resin defluorinating agent is used as a defluorinating material, the high molecular defluorinating material has a specific defluorinating characteristic, namely, the high molecular defluorinating material only aims at the directional removal of fluorine ions and protects beneficial trace elements from being adsorbed, 1-20 mg/l of the fluorine ions can be reduced to be below 1mg/l, and the concentration of strontium ions can be kept to be above 90 percent, so that the defluorination can be ensured and the beneficial trace elements are not influenced; 4. the beneficial trace elements can be prevented from being removed while iron, manganese and fluorine are removed from the hot spring water, so that the quality of the effluent water is excellent, the effluent water reaching the standard is subjected to ultraviolet disinfection and then enters a water consumption point, and therefore, the standard of natural mineral water and the standard of drinking water are achieved, the standard content of mineral substances in the water is reserved, the hot spring water drinking device is sanitary, safe, beneficial to human health, and finally hot spring direct drinking is achieved.
In a specific embodiment, the heat exchanger 1 adopts an automatic control device, and the water replacement amount of the heat exchanger is controlled by monitoring the outlet water temperature, so as to achieve the purposes of automatic control and energy saving. Specifically, referring to fig. 1, a water outlet pipeline of the heat exchanger 1 is connected with a temperature sensor 11, an output end of the temperature sensor 11 is connected with a temperature control system 12, and an output end of the temperature control system 12 is connected with a switch valve 13 on an input pipeline of the heat exchanger 1. In this embodiment, the temperature sensor 11 detects the water temperature on the water outlet pipeline of the heat exchanger 1, and the temperature control system 12 in the prior art controls the opening of the switch valve 13 according to the water temperature detection result, so as to realize the automatic control of the temperature of the thermal spring water after heat exchange.
As a specific embodiment, a turbidity meter (not shown) is arranged on the water outlet pipeline of the quartz sand filter 4, the water outlet pipeline of the quartz sand filter 4 is connected with a filtering backwashing pipeline 41 and a filtering sewage pipeline 42, one end of the filtering backwashing pipeline 41 is connected with the water outlet pipeline of the thermal spring water storage tank 10 through a backwashing pump unit 40, the other end of the filtering backwashing pipeline is connected with one end of the filtering sewage pipeline 42 through the water outlet pipeline of the quartz sand filter 4, and the other end of the filtering sewage pipeline 42 is close to an outdoor sewage well, so that the turbidity degree of water fed into the water outlet pipeline of the quartz sand filter 4 is detected on line through the turbidity meter, and the filtering backwashing process can be automatically controlled.
As a specific embodiment, please refer to fig. 1, a ferrimanganic ion detector (not shown) is arranged on a water outlet pipeline of the ferrimanganic remover 5, the specific structure and the working principle of the ferrimanganic ion detector are well known to those skilled in the art, a ferrimanganic removal backwash pipeline 51 and a ferrimanganic removal sewage pipeline 52 are connected to the water outlet pipeline of the ferrimanganic remover 5, one end of the ferrimanganic removal backwash pipeline 51 is connected to the water outlet pipeline of the thermal spring water storage tank 10 through a backwash pump set 40, the other end of the ferrimanganic removal backwash pipeline is connected to the ferrimanganic remover through the water outlet pipeline of the ferrimanganic remover 5, a first backwash switch valve 53 is connected to the ferrimanganic removal backwash pipeline 51 near the water outlet pipeline of the ferrimanganic remover 5, one end of the ferrimanganic removal sewage pipeline 52 is connected to a sewage discharge port of the ferrimanganic remover 5, and the other end; the iron and manganese ion detector is used for detecting iron and manganese ions in the water outlet pipeline, the system PLC judges the content of the detected iron and manganese ions, if the iron and manganese ions exceed the standard (if the iron ion content exceeds 20mg/L, the manganese ion content exceeds 3mg/L), the system PLC controls a first back-flushing switch valve 53 on the iron and manganese removal back-flushing pipeline 51 to be opened for back-flushing, and the back-flushing strength is controlled to be 16-20L/s.m.2And the backwashing time is controlled to be 8-12 min, the whole process is automatically finished, and the sewage after backwashing is discharged to an adjacent outdoor sewage well through a ferro-manganese removal sewage pipeline 52.
As a specific embodiment, referring to fig. 1, a water outlet pipeline of the fluorine ion exchanger 6 is provided with a fluorine ion detector (not shown), the specific structure and the working principle of the fluorine ion detector are well known to those skilled in the art, the water outlet pipeline of the fluorine ion exchanger 6 is connected with a fluorine removal back flush pipeline 61 and a sewage discharge pipeline 62, one end of the fluorine removal back flush pipeline 61 is connected with the water outlet pipeline of the thermal spring water storage tank 10 through a back flush pump set 40, the other end of the fluorine removal back flush pipeline is connected with the fluorine ion exchanger 6 through the water outlet pipeline of the fluorine ion exchanger 6, a second back flush switch valve 63 is connected to the fluorine removal back flush pipeline 61 near the water outlet pipeline of the fluorine ion exchanger, one end of the sewage discharge pipeline 62 is connected with a sewage discharge port of the fluorine ion exchanger 6, and the other end is connected with the back flush fluorine ion processing; the fluorine ion detector is used for detecting fluorine ions in a water outlet pipeline of the fluorine ion exchanger, the PLC of the system judges the content of the detected fluorine ions, if the fluorine ions exceed the standard (such as the content of the fluorine ions exceeds 10mg/l), the PLC of the system controls a second back-flushing switch valve 63 on a defluorination back-flushing pipeline 61 to be opened for back-flushing, the back-flushing flow rate is controlled to be 3-5 BV, the back-flushing time is controlled to be 30-60 min, the whole process is automatically completed, and sewage after back-flushing is discharged to a back-flushing fluorine ion treatment device 50 through a sewage discharge pipeline 62 to be treated.
As a preferred embodiment, referring to fig. 1, the fluoride ion exchanger 6 is further connected to an acid solution tank 65 through an acid solution delivery pipe 64, the acid solution tank 65 contains a strong acid solution such as sulfuric acid, and the acid solution delivery pipe 64 is connected to an acid solution delivery pump (not shown), so that when the fluoride ion exchanger 6 needs to be backwashed, the strong acid solution in the acid solution tank 65 can be delivered to the fluoride ion exchanger 6 through the acid solution delivery pipe 64 by the acid solution delivery pump, and neutralized with the regenerated strong base solution, thereby accelerating the process and efficiency of the backwashing of the fluoride ion exchanger 6.
As a specific example, referring to fig. 1, the back-flushing fluoride ion treatment device 50 comprises an integrated fluorine precipitation device 501, a pneumatic diaphragm pump 502 and a plate-and-frame filter press 503 which are connected in sequence, the specific structure and operation principle of the integrated fluorine precipitation device 501, the pneumatic diaphragm pump 502 and the plate-and-frame filter press 503 are well known in the prior art, calcium oxide is firstly added into the integrated fluorine precipitation equipment 501 to precipitate fluorine ions, the ratio of the calcium oxide dosage to the fluorine content in water is 20-30: 1, so as to reduce the concentration of the fluorine ions in the concentrated water to be below 20ppm, adding the positively charged modified nano-iron, wherein the ratio of the consumption of the modified nano-iron to the fluorine content in the water is 10-20: 1, the fluorine ions which are less than 20ppm in the adsorption and precipitation water are reduced to the discharge standard, the modified nano-iron fluorine removal agent can reduce the fluorine sludge amount, and only 0.2kg of sludge is generated in each ton of water; the backwashing fluoride ions are treated by calcium oxide and modified nano iron and then precipitated for 1-2 hours, namely the precipitation time of the treated fluoride ions by the calcium oxide and the modified nano iron is controlled to be 1-2 hours, and finally the fluorine-containing precipitate is conveyed to a plate-and-frame filter press 503 through a pneumatic diaphragm pump 502 and is filtered and pressed as solid waste to be removed.
As a specific embodiment, referring to fig. 1, the regenerating device 7 includes an alkali liquor tank 71 for storing a strong alkali solution, the alkali liquor tank 71 is connected to an alkali liquor delivery pipe 72, the other end of the alkali liquor delivery pipe 72 is connected to the fluorine ion exchanger 6, the alkali liquor delivery pipe 72 is connected to an alkali liquor delivery pump (not shown), when the regenerating device is used, the alkali liquor delivery pump is started, a switch valve on the alkali liquor delivery pipe 72 is opened, the strong alkali solution in the alkali liquor tank 71 can be delivered to the fluorine ion exchanger 6 through the alkali liquor delivery pipe 72, the regenerating period is 38-40 hours, the regenerating flow rate is 1.5-2.5 BV, and the regenerating time is 60-120 min. As a preferred embodiment, the strong alkaline solution contained in the alkaline solution medicine box 71 is 1% to 10% sodium hydroxide solution.
As a specific embodiment, the main material of the ultraviolet sterilizer 30 is stainless steel, so that other ions can be prevented from entering hot spring water during the sterilization process, and the quality of hot spring drinking water is improved.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (10)
1. A production method of hot spring direct drinking water capable of retaining beneficial trace elements is characterized by comprising the following steps:
a heat exchange step: introducing hot spring water outlet water into a heat exchanger for heat exchange, and controlling the temperature of the hot spring water after heat exchange to be 20-40 ℃;
a water storage step: enabling the hot spring water after heat exchange to enter a raw water storage tank, wherein a water level controller is arranged in the raw water storage tank, and controlling the water level of the raw water storage tank to be 1-2 m through the water level controller;
and (3) filtering: hot spring water in a raw water storage tank is delivered into a quartz sand filter through a lifting pump, and the quartz sand filter is filled with SiO2The content of the desalted natural sea sand filter material is more than or equal to 98%, the particle size is 0.8-4.0 mm, the thickness of the filter material is 80-150 cm, the quartz sand filter adopts a top-in-bottom-out filtering mode, fed hot spring water is filtered by the natural sea sand filter material to remove suspended matters in the water, the filtering speed is controlled to be 4-10 BV, and the dissolved ions of the hot spring water are not changed after the desalted natural sea sand is filtered;
iron and manganese removal: the hot spring water filtered by the natural sea sand filter material automatically flows into a ferro-manganese remover filled with high polymer MnO with the thickness of 80-150 cm2The chelating resin ferromanganese remover has the advantages that the ferromanganese remover has preferential adsorption effect on ferromanganese and can remove ferromanganese ions without aeration, the ferromanganese remover adopts an upward-out filtering mode, and hot spring water fed into the ferromanganese remover is subjected to high-molecular MnO loading2Removing iron and manganese from the chelate resin, and controlling the filtration rate to be 4-15 BV so as to keep more than 90% of strontium selenium ions;
and (3) fluorine removal: allowing hot spring water subjected to iron and manganese removal to automatically flow into a fluorine ion exchanger, wherein the fluorine ion exchanger is filled with high-molecular-load ZrO with the thickness of 80-155 cm2The chelating resin defluorinating agent has high selective adsorbability only aiming at the directional removal of fluorine ions, the fluorine ion exchanger adopts an upper inlet and upper outlet water inlet mode to lead the fed hot spring water to pass through the high-molecular-load ZrO2After adsorption, the chelating resin defluorinating agent is used for directionally removing fluorine ions, the filtration rate is controlled to be 10-20 BV, the pH value is 5-8, so that 1-20 mg/l of fluorine ions are reduced to be below 1mg/l, and the concentration of strontium ions is kept to be above 90%; the fluorine ion exchanger is connected with a regeneration device, and the regeneration device is used for loading high-molecular ZrO into the fluorine ion exchanger2Delivering strong alkali solution to chelate resin defluorinating agent to enhance the high-molecular-weight ZrO2The adsorptivity of the chelating resin defluorinating agent ensures that the interior polymer carries ZrO2Regenerating the chelating resin defluorinating agent in a saturated state;
a neutralization step: enabling the defluorinated hot spring water to automatically flow into a neutralizing water tank, wherein a sulfuric acid adding device is connected to the neutralizing water tank, the sulfuric acid adding device comprises a sulfuric acid adding tank connected with the neutralizing water tank, a dosing pump is mounted on a pipeline connecting the sulfuric acid adding tank and the neutralizing water tank, a water outlet pipeline of the neutralizing water tank is connected with a water quality detector for detecting a pH value, the dosing pump controls the amount of sulfuric acid added into the neutralizing water tank according to the pH value detected by the water quality detector, and the pH value of the neutralized hot spring water on the water outlet pipeline of the neutralizing water tank is adjusted and controlled to be 5-7;
water storage step: enabling the neutralized hot spring water to automatically flow into a hot spring water storage tank, wherein the hot spring water storage tank is provided with a liquid level controller and an online ion detector, the liquid level controller is used for keeping the water level of the hot spring to change within a set range, the online ion detector is used for detecting fluorine, iron, manganese and various beneficial trace elements in the hot spring water in real time, and if the content of any ion exceeds the standard, the hot spring water enters an alarm state, and a water outlet pump and a water outlet valve are closed;
a disinfection step: and sterilizing the thermal spring water after the water storage reaches the standard by an ultraviolet disinfection lamp of an ultraviolet sterilizer, and enabling the thermal spring water after ultraviolet disinfection to enter a water consumption point.
2. A hot spring direct drinking water production method capable of retaining beneficial trace elements as claimed in claim 1, wherein a water outlet pipeline of the heat exchanger is connected with a temperature sensor, an output end of the temperature sensor is connected with a temperature control system, and an output end of the temperature control system is connected with a switch valve on an input pipeline of the heat exchanger.
3. A method for producing hot spring direct drinking water capable of retaining beneficial trace elements as claimed in claim 1, wherein a turbidity meter is disposed on the outlet pipe of the quartz sand filter, a filtering back-flushing pipe and a filtering sewage pipe are connected to the outlet pipe of the quartz sand filter, one end of the filtering back-flushing pipe is connected to the outlet pipe of the hot spring water storage tank through a back-flushing pump set, the other end of the filtering back-flushing pipe is connected to one end of the filtering sewage pipe through the outlet pipe of the quartz sand filter, and the other end of the filtering sewage pipe is close to the outdoor sewage well.
4. The production method of hot spring direct drinking water capable of retaining beneficial trace elements as claimed in claim 1, wherein a ferro-manganese ion detector is arranged on the water outlet pipeline of the ferro-manganese remover, a ferro-manganese removal back flush pipeline and a ferro-manganese removal sewage pipeline are connected to the water outlet pipeline of the ferro-manganese remover, one end of the ferro-manganese removal back flush pipeline is connected with the water outlet pipeline of the hot spring water storage tank through a back flush pump set, the other end of the ferro-manganese removal back flush pipeline is connected with the ferro-manganese remover through the water outlet pipeline of the ferro-manganese remover, a first back flush switch valve is connected to the ferro-manganese removal back flush pipeline close to the water outlet pipeline of the ferro-manganese remover, one end of the ferro-manganese removal sewage pipeline is connected with a sewage outlet of the ferro-manganese remover, the other end of the ferro-manganese removal sewage pipeline is close to an outdoor sewage well2And controlling the back washing time to be 8-12 min.
5. The production method of hot spring direct drinking water capable of retaining beneficial trace elements according to claim 1, wherein a fluorine ion detector is arranged on a water outlet pipeline of the fluorine ion exchanger, a fluorine removal back flush pipeline and a sewage discharge pipeline are connected to the water outlet pipeline of the fluorine ion exchanger, one end of the fluorine removal back flush pipeline is connected with the water outlet pipeline of the hot spring water storage tank through a back flush pump set, the other end of the fluorine removal back flush pipeline is connected with the fluorine ion exchanger through the water outlet pipeline of the fluorine ion exchanger, a second back flush switch valve is connected to the fluorine ion exchanger close to the water outlet pipeline of the fluorine ion exchanger, one end of the sewage discharge pipeline is connected with a sewage discharge port of the fluorine ion exchanger, the other end of the sewage discharge pipeline is connected with a back flush fluorine ion treatment device, the back flush flow rate is controlled to be 3-5 BV, and the.
6. A production method of hot spring direct drinking water capable of retaining beneficial trace elements as claimed in claim 5, wherein said fluoride ion exchanger is further connected to an acid liquor tank through an acid liquor delivery pipe, said acid liquor tank contains a strong acid solution, and said acid liquor delivery pipe is connected to an acid liquor delivery pump.
7. A production method of hot spring direct drinking water capable of retaining beneficial trace elements as claimed in claim 5, wherein the back flush fluoride ion treatment device comprises an integrated fluoride precipitation device, a pneumatic diaphragm pump and a plate and frame filter press which are connected in sequence, calcium oxide is firstly added into the integrated fluoride precipitation device to precipitate fluoride ions, the ratio of the calcium oxide dosage to the fluorine content in water is 20-30: 1, then positively charged modified nano iron is added, and the ratio of the modified nano iron dosage to the fluorine content in water is 10-20: 1; and (3) treating the backwashing fluoride ions by calcium oxide and modified nano iron, precipitating for 1-2 hours, and finally conveying the fluorine-containing precipitate to a plate-and-frame filter press by a pneumatic diaphragm pump for filter pressing to remove the fluorine-containing precipitate as solid waste.
8. A hot spring direct drinking water production method capable of reserving beneficial trace elements as claimed in claim 1, wherein the regeneration device comprises an alkali liquor medicine box for storing strong alkali solution, the alkali liquor medicine box is connected with an alkali liquor delivery pipeline, the other end of the alkali liquor delivery pipeline is connected with a fluorine ion exchanger, the alkali liquor delivery pipeline is connected with an alkali liquor delivery pump, the regeneration period is 38-40 h, the regeneration flow rate is 1.5-2.5 BV, and the regeneration time is 60-120 min.
9. A production method of hot spring direct drinking water capable of retaining beneficial microelements as claimed in claim 8, wherein the strong alkaline solution stored in the lye kit is 1% -10% sodium hydroxide solution.
10. A production method of hot spring direct drinking water capable of retaining beneficial microelements as claimed in claim 1, wherein the main material of the ultraviolet disinfector is made of stainless steel.
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| CN202011622789.6A CN112811691A (en) | 2020-12-31 | 2020-12-31 | Production method of hot spring direct drinking water capable of retaining beneficial trace elements |
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