Fluorine-containing wastewater treatment system

Abstract

The utility model relates to the technical field of wastewater treatment, and discloses a fluorine-containing wastewater treatment system. The system comprises a circulating unit which comprises a storage tank used for containing waste water; the filtering unit comprises a filter, and a water inlet of the filter is communicated with the storage tank through a first pipeline; the heat circulation unit comprises a heat exchange processor, and a water inlet of the heat exchange processor is communicated with a water outlet of the filter through a second pipeline; the fluorine treatment unit comprises an ion exchange resin filling tower, the ion exchange resin filling tower comprises an interlayer shell and an ion exchange resin mechanism arranged in the interlayer shell, a material inlet and a material outlet are formed in the interlayer shell, and a water inlet and a water outlet are formed in the ion exchange resin mechanism. The fluorine-containing wastewater treatment system provided by the utility model can effectively remove fluorine ions in wastewater on the premise of not adding auxiliaries, so that the fluorine-containing wastewater treatment cost is remarkably reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wastewater treatment, specifically relates to a kind of fluorine-containing wastewater treatment system. BACKGROUND

[0002] In the process of producing photovoltaic glass, wastewater containing hydrogen fluoride and nitric acid will be discharged, and the fluorine ions in the wastewater will cause water pollution and serious harm to the ecological environment if discharged directly without treatment.

[0003] The current method for treating fluorine-containing wastewater is chemical precipitation, which involves adding lime, calcium chloride and flocculants to the wastewater to remove fluorine ions. The principle of this method is that fluorine ions and calcium ions form calcium fluoride precipitate to remove fluorine ions from wastewater.

[0004] However, after chemical precipitation, the concentration of fluorine ions in the water body is significantly reduced, but the content of COD and the conductivity of the water body increase accordingly, making it impossible to discharge directly, and increasing the difficulty and cost of subsequent wastewater treatment. INVENTION CONTENTS

[0005] The purpose of the utility model is to effectively remove fluorine ions from wastewater without adding additives.

[0006] To achieve the above purpose, the utility model provides a fluorine-containing wastewater treatment system, which comprises:

[0007] A circulation unit comprising a storage tank for holding wastewater;

[0008] A filtration unit comprising a filter, the water inlet of the filter is connected to the storage tank through a first pipeline; the filter can be used to filter the wastewater from the storage tank;

[0009] A heat circulation unit comprising a heat exchanger, the water inlet of the heat exchanger is connected to the water outlet of the filter through a second pipeline; the heat exchanger can be used to heat the wastewater filtered by the filter;

[0010] A fluorine treatment unit comprising an ion exchange resin packed tower, the ion exchange resin packed tower comprises a sandwich shell and an ion exchange resin mechanism arranged inside the sandwich shell, the sandwich shell is provided with a material inlet and a material outlet, the ion exchange resin mechanism is provided with a water inlet and a water outlet, the water inlet of the ion exchange resin mechanism is connected to the water outlet of the heat exchanger through a third pipeline; the cavity sandwich of the sandwich shell can hold materials for heating the ion exchange resin mechanism, and the ion exchange resin mechanism can be used for fluorine separation treatment of the wastewater heated by the heat exchanger.

[0011] Preferably, the system further comprises a first circulating pump, a third switch valve and a circulating pipeline provided with the first switch valve;

[0012] The first circulating pump and the third switch valve are arranged on the third pipeline, and the third switch valve is arranged after the first circulating pump; the water inlet of the circulating pipeline is arranged on the third pipeline and between the first circulating pump and the third switch valve;

[0013] The circulating pipeline can be used to recycle the treated wastewater from the heat exchange processor back to the storage tank when replacing the ion exchange resin in the ion exchange resin mechanism; and the first circulating pump can be used to pump the treated wastewater from the heat exchange processor into the ion exchange resin mechanism or the storage tank.

[0014] In a preferred case, a first regulating valve, the first switch valve, a first temperature measuring element and a first flow meter are arranged on the circulating pipeline in sequence in the direction of wastewater circulation.

[0015] In a preferred case, a second temperature measuring element, a second regulating valve, the first circulating pump, the third switch valve, a first pressure measuring element, a check valve and a second flow meter are arranged on the third pipeline in sequence in the direction of wastewater circulation.

[0016] Preferably, the ion exchange resin mechanism is further provided with a pressure relief port, and the pressure relief port is communicated with the storage tank through a fourth pipeline, and the fourth pipeline can be used to balance the pressure in the ion exchange resin mechanism.

[0017] In a preferred case, the system further comprises a fifth pipeline provided with an online monitoring element, and a water inlet of the fifth pipeline is communicated with a water outlet of the ion exchange resin mechanism; and the fifth pipeline can be used to discharge the treated wastewater from the ion exchange resin filling tower.

[0018] Further preferably, a third flow meter, a fifth switch valve, the online monitoring element, a sixth switch valve and a third regulating valve are arranged on the fifth pipeline in sequence in the direction of wastewater circulation.

[0019] Preferably, the system further comprises a second circulating pump and a sixth pipeline provided with a seventh switch valve;

[0020] The second circulating pump is arranged on the fifth pipeline and between the online monitoring element and the sixth switch valve; and a water inlet of the sixth pipeline is arranged on the fifth pipeline and between the second circulating pump and the sixth switch valve.

[0021] The sixth pipeline can be used to recycle the treated wastewater of the ion exchange resin packed tower back to the storage tank; and the second circulating pump can be used to pump the treated wastewater of the ion exchange resin packed tower into the storage tank or directly discharge.

[0022] Preferably, the first regulating valve is a self-operated valve post pressure regulating valve.

[0023] Preferably, the second regulating valve is a self-operated valve front pressure regulating valve.

[0024] By the above technical solution, the fluorine-containing wastewater treatment system has the following advantages

[0025] Advantages:

[0026] (1) The fluorine-containing wastewater treatment system can effectively remove the fluorine ions in the wastewater without adding an auxiliary agent (without introducing other components), so that the fluorine-containing wastewater treatment cost is significantly reduced.

[0027] (2) In the present application, the heat exchange processor is arranged to control the temperature of the wastewater entering the ion exchange resin packed tower, thereby improving the removal efficiency of the fluorine ions.

[0028] (3) In the present application, the sandwich shell is arranged outside the ion exchange resin mechanism, and the heating material is placed in the cavity sandwich shell, so that the ion exchange resin mechanism can be heated, the temperature of the wastewater entering the ion exchange resin mechanism can be kept constant, heat loss can be avoided, and the removal efficiency of the fluorine ions can be effectively improved.

[0029] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structure schematic view of a system for treating fluorine-containing wastewater in a specific embodiment of the present application.

[0031] EXPLANATION OF REFERENCE NUMERALS

[0032] 100, circulating unit 101, storage tank

[0033] 102, first pipeline 200, filtering unit

[0034] 201, filter 202, second pipeline

[0035] 300, thermal circulating unit 301, heat exchange processor

[0036] 302, first circulating pump 303, first on-off valve

[0037] 304 first regulating valve 305 first temperature measuring element

[0038] 306 first flow meter 307 second on-off valve

[0039] 308 second temperature measuring element 309 second regulating valve

[0040] 310 third on-off valve 311 first pressure measuring element

[0041] 312 check valve 313 second flow meter

[0042] 314 fourth on-off valve 315 third pipe

[0043] 316 circulating pipe 400 fluorine treatment unit

[0044] 401 sandwich shell 4010 material inlet

[0045] 4011 material outlet 402 ion exchange resin mechanism

[0046] 4020 water inlet of ion exchange resin mechanism

[0047] 4021 water outlet of ion exchange resin mechanism

[0048] 4022 pressure relief port 403 on-line monitoring element

[0049] 404 third flow meter 405 fifth on-off valve

[0050] 406 sixth on-off valve 407 third on-off valve

[0051] 408 fifth pipe 409 second circulating pump

[0052] 410 fourth pipe 501 sixth pipe

[0053] 502 seventh on-off valve DETAILED DESCRIPTION

[0054] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the present application.

[0055] The endpoints of the ranges and any values disclosed herein are not limited to the precise values stated. The endpoints of the ranges and any values are understood to be approximate values. The endpoints of the ranges and any values can be approximated to the nearest tenth. For ranges comprising two or more parameters, the endpoints of the ranges and any values are understood to be independent of one another. The endpoints of the ranges and any values should be interpreted as being approximate values. The endpoints of the ranges and any values can be approximated to the nearest tenth. For ranges comprising two or more parameters, the endpoints of the ranges and any values are understood to be independent of one another. The endpoints of the ranges and any values should be interpreted as being approximate values.

[0056] It should be noted that when an element is referred to as being "fixed to" or "set to" another element, it can be directly on the other element or indirectly on the other element.

[0057] As described above, the utility model provides a kind of fluorine-containing wastewater treatment system, as shown in figure Figure 1 The system comprises:

[0058] Circulation unit 100, including the storage tank 101 that can be used to hold wastewater;

[0059] Filter unit 200, comprising filter 201, the water inlet of the filter 201 is communicated with the storage tank 101 by first pipeline 102;The filter 201 can be used to filter the wastewater from the storage tank 101;

[0060] Heat cycle unit 300, comprising heat exchange processor 301, the water inlet of the heat exchange processor 301 is communicated with the water outlet of the filter 201 by second pipeline 202;The heat exchange processor 301 can be used to heat treatment after the wastewater filtered by the filter 201;

[0061] Fluorine treatment unit 400, comprising ion exchange resin filled tower, the ion exchange resin filled tower includes sandwich shell 401 and the ion exchange resin mechanism 402 that is arranged in the sandwich shell 401, the sandwich shell 401 is equipped with material inlet 4010 and material outlet 4011, the ion exchange resin mechanism 402 is equipped with water inlet 4020 and water outlet 4021, the water inlet 4020 of the ion exchange resin mechanism 402 is communicated with the water outlet of the heat exchange processor 301 by third pipeline 315;The cavity interlayer of the sandwich shell 401 can hold the material that will heat the ion exchange resin mechanism 402, the ion exchange resin mechanism 402 can be used to separate fluorine after the wastewater of heat treatment by the heat exchange processor 301.

[0062] The heat exchange processor 301 is provided in the utility model, the wastewater temperature entering the ion exchange resin mechanism 402 can be regulated and controlled, and the removal efficiency of fluorine ion is improved;And, by setting the sandwich shell 401 outside the ion exchange resin mechanism 402, the heating material is placed in the sandwich shell 401, the ion exchange resin mechanism 402 can be heated, to avoid the temperature of the ion exchange resin mechanism 402 lower than the temperature of wastewater, so as to ensure that the wastewater temperature entering the ion exchange resin mechanism 402 remains constant, prevent heat loss, and effectively improve the removal efficiency of fluorine ion.

[0063] In an embodiment of the utility model, refer to Figure 1 , the system still includes first circulating pump 302, third switch valve 310 and be equipped with first switch valve 303 circulating pipeline 316;

[0064] First circulating pump 302 and third switch valve 310 are arranged on third pipeline 315, and third switch valve 310 is arranged after first circulating pump 302;The water inlet of circulating pipeline 316 is arranged on third pipeline 315, and is located between first circulating pump 302 and third switch valve 310;

[0065] Circulating pipeline 316 can be used to recycle the wastewater treated by heat exchanger processor 301 back to storage tank 101 when replacing ion exchange resin in ion exchange resin mechanism 402;First circulating pump 302 can be used to pump the wastewater treated by heat exchanger processor 301 into ion exchange resin mechanism 402 or storage tank 101.

[0066] It needs to be explained that, under normal circumstances, first switch valve 303 is in closed state, and third switch valve 310 is in open state, at this time, the wastewater treated by heat exchanger processor 301 is pumped into ion exchange resin mechanism 402 by first circulating pump 302;When replacing ion exchange resin in ion exchange resin mechanism 402, third switch valve 310 needs to be closed, and first switch valve 303 needs to be opened, at this time, the wastewater treated by heat exchanger processor 301 is pumped back into storage tank 101 by first circulating pump 302, so as to ensure that the temperature of fluorine-containing wastewater is stable.

[0067] Preferably, first regulating valve 304, first switch valve 303, first temperature measuring element 305 and first flowmeter 306 are sequentially arranged on circulating pipeline 316 in the direction of wastewater circulation.

[0068] The second switch valve 307 provided by the utility model is in open state under normal circumstances;First flowmeter 306 is used to monitor the circulation flow of fluorine-containing wastewater;First temperature measuring element 305 is used to monitor the temperature of circulating fluorine-containing wastewater;First regulating valve 304 is used to adjust the flow of circulating fluorine-containing wastewater.

[0069] More preferably, second switch valve 307 is further arranged between first temperature measuring element 305 and first flowmeter 306.

[0070] Preferably, a second temperature measuring element 308, a second regulating valve 309, the first circulating pump 302, the third switch valve 310, a first pressure measuring element 311, a check valve 312 and a second flow meter 313 are sequentially arranged on the third pipeline 315 in the direction of the wastewater circulation.

[0071] The second temperature measuring element 308 is used for monitoring the temperature of the wastewater after the heat exchange processor 301 processes, and preferably, when the temperature of the wastewater after the heat exchange processor 301 processes is 45-60 DEG C, the fluorine removal efficiency of the fluorine-containing wastewater treatment system provided by the utility model is higher.

[0072] The second regulating valve 309 is used for adjusting the flow entering the ion exchange resin packed tower, and the adjusting range is 3-5 times the volume of the resin; the first pressure measuring element 311 is used for monitoring the outlet pressure of the first circulating pump 302 to prevent equipment failure; the check valve 312 is used for preventing the fluorine-containing wastewater from backflowing; and the second flow meter 313 is used for monitoring the actual flow of the fluorine-containing wastewater entering the ion exchange resin packed tower.

[0073] More preferably, a fourth switch valve 314 is arranged between the first pressure measuring element 311 and the check valve 312.

[0074] The fourth switch valve 314 is in an open state under normal circumstances, and is used for being closed when instruments and equipment are overhauled.

[0075] In an embodiment of the utility model, referring to Figure 1 , the ion exchange resin mechanism 402 is further provided with a pressure relief port 4022, and the pressure relief port 4022 is communicated with the storage tank 101 through a fourth pipeline 410; the fourth pipeline 410 can be used for balancing the pressure in the ion exchange resin mechanism 402.

[0076] In an embodiment of the utility model, referring to Figure 1 , the system further comprises a fifth pipeline 408 provided with an online monitoring element 403; the water inlet of the fifth pipeline 408 is communicated with the water outlet 4021 of the ion exchange resin mechanism 402; and the fifth pipeline 408 can be used for discharging the wastewater after the ion exchange resin packed tower processes.

[0077] The online monitoring element 403 is used for detecting the fluorine concentration in the wastewater treated by the ion exchange resin mechanism 402, and when the fluorine concentration is greater than 1.5 mg / L, a light will be turned on to give a warning, at this time, the third switch valve 310 is closed, the first switch valve 303 is opened, the ion exchange resin in the ion exchange resin mechanism 402 is replaced, meanwhile, the discharged wastewater is stored and is transported back to the storage tank 101 to be treated again; after the ion exchange resin membrane in the ion exchange resin mechanism 402 is replaced, the third switch valve 310 and the first switch valve 303 are restored to the original state, and the treatment of the fluorine-containing wastewater is continued.

[0078] Preferably, the third flow meter 404, the fifth switch valve 405, the online monitoring element 403, the sixth switch valve 406 and the third regulating valve 407 are sequentially arranged on the fifth pipeline 408 in the direction of wastewater circulation.

[0079] The third flow meter 404 is used for monitoring the wastewater flow after fluorine separation, and provides data reference for the balance adjustment of the wastewater in and out of the ion exchange resin packed tower; the sixth switch valve 406 is used for controlling the discharge of the wastewater, when the online monitoring element 403 gives a light warning, the sixth switch valve 406 is closed to prevent the discharge of the wastewater that does not meet the standard; the third regulating valve 407 is used for adjusting the flow of the discharged wastewater, and maintaining the balance of the wastewater in and out of the system, if the amount of the wastewater entering for a long time is greater than the amount of the wastewater discharged, the wastewater will overflow the system, if the amount of the wastewater entering for a long time is less than the amount of the wastewater discharged, part of the resin will be filled with air and be invalid, and the treatment effect is reduced; the fifth switch valve 405 is in an open state under normal circumstances, and is used for discharging the internal liquid when the ion exchange resin is replaced or the system is overhauled.

[0080] More preferably, the third regulating valve 407 is a self-force type valve post pressure regulating valve.

[0081] In an embodiment of the utility model, referring to Figure 1 The system further comprises a second circulating pump 409 and a sixth pipeline 501 provided with a seventh switch valve 502;

[0082] The second circulating pump 409 is arranged on the fifth pipeline 408 and located between the online monitoring element 403 and the sixth switch valve 406; the water inlet of the sixth pipeline 501 is arranged on the fifth pipeline 408 and located between the second circulating pump 409 and the sixth switch valve 406;

[0083] The sixth pipeline 501 can be used to recycle the treated wastewater of the ion exchange resin packed tower into the storage tank 101, and the second circulating pump 409 can be used to pump the treated wastewater of the ion exchange resin packed tower into the storage tank 101 or directly discharge.

[0084] It should be noted that, in normal circumstances, the seventh switch valve 502 is in a closed state, and the fifth switch valve 405 and the sixth switch valve 406 are in an open state; when the online monitoring device detects that the fluorine concentration in the wastewater is greater than 1.5 mg / L, a light warning will be given, at this time, the third switch valve 310 is closed, the first switch valve 303 is opened, the ion exchange resin in the ion exchange resin mechanism 402 is replaced, at the same time, the sixth switch valve 406 is closed, and the seventh switch valve 502 is opened, so that the wastewater treated by the ion exchange resin packed tower is pumped back to the storage tank 101 by the second circulating pump 409, thereby the wastewater that does not meet the standard is treated again, and after the ion exchange resin membrane in the ion exchange resin mechanism 402 is replaced, the third switch valve 310, the first switch valve 303, the sixth switch valve 406 and the seventh switch valve 502 are restored to the original state, and the treatment of the wastewater containing fluorine is continued.

[0085] Preferably, the first regulating valve 304 is a self-operated valve post pressure regulating valve.

[0086] Preferably, the second regulating valve 309 is a self-operated valve front pressure regulating valve.

[0087] In the description of the present application, it should be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0088] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0089] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0090] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A system for treating fluorine-containing wastewater, characterized by comprising: The system comprises: a circulating unit (100) comprising a storage tank (101) capable of containing wastewater; a filtering unit (200) comprising a filter (201), a water inlet of the filter (201) being communicated with the storage tank (101) through a first pipeline (102), and the filter (201) being capable of filtering the wastewater from the storage tank (101); a heat circulating unit (300) comprising a heat exchanger (301), a water inlet of the heat exchanger (301) being communicated with a water outlet of the filter (201) through a second pipeline (202), and the heat exchanger (301) being capable of heating the wastewater filtered by the filter (201); a fluorine treatment unit (400) comprising an ion exchange resin filled tower, the ion exchange resin filled tower comprising a sandwich shell (401) and an ion exchange resin mechanism (402) arranged inside the sandwich shell (401), the sandwich shell (401) being provided with a material inlet (4010) and a material outlet (4011), the ion exchange resin mechanism (402) being provided with a water inlet (4020) and a water outlet (4021), the water inlet (4020) of the ion exchange resin mechanism (402) being communicated with a water outlet of the heat exchanger (301) through a third pipeline (315), and a cavity layer of the sandwich shell (401) being capable of containing a material for heating the ion exchange resin mechanism (402), and the ion exchange resin mechanism (402) being capable of separating fluorine from the wastewater heated by the heat exchanger (301).

2. The system of claim 1, wherein, The system further comprises a first circulating pump (302), a third switch valve (310) and a circulating pipeline (316) provided with a first switch valve (303); the first circulating pump (302) and the third switch valve (310) are arranged on the third pipeline (315), and the third switch valve (310) is arranged after the first circulating pump (302); a water inlet of the circulating pipeline (316) is arranged on the third pipeline (315) and located between the first circulating pump (302) and the third switch valve (310); the circulating pipeline (316) is capable of circulating the wastewater treated by the heat exchanger (301) back to the storage tank (101) when the ion exchange resin in the ion exchange resin mechanism (402) is replaced; and the first circulating pump (302) is capable of pumping the wastewater treated by the heat exchanger (301) into the ion exchange resin mechanism (402) or the storage tank (101).

3. The system of claim 2, wherein, A first regulating valve (304), the first switch valve (303), a first temperature measuring device (305) and a first flowmeter (306) are arranged on the circulating pipeline (316) in sequence in the direction of wastewater circulation.

4. The system of claim 2, wherein, A second temperature measuring device (308), a second regulating valve (309), the first circulating pump (302), the third switch valve (310), a first pressure measuring device (311), a check valve (312) and a second flow meter (313) are sequentially arranged on the third pipeline (315) in the direction of wastewater circulation.

5. The system of claim 1 or 2, wherein, The ion exchange resin mechanism (402) is further provided with a pressure relief port (4022), and the pressure relief port (4022) communicates with the storage tank (101) through a fourth pipeline (410), and the fourth pipeline (410) can be used to balance the pressure in the ion exchange resin mechanism (402).

6. The system of claim 1 or 2, wherein, The system further comprises a fifth pipeline (408) provided with an online monitoring device (403), a water inlet of the fifth pipeline (408) communicates with a water outlet (4021) of the ion exchange resin mechanism (402); the fifth pipeline (408) can be used to discharge the wastewater treated by the ion exchange resin packed tower.

7. The system of claim 6, wherein, A third flow meter (404), a fifth switch valve (405), the online monitoring device (403), a sixth switch valve (406) and a third regulating valve (407) are sequentially arranged on the fifth pipeline (408) in the direction of wastewater circulation.

8. The system of claim 7, wherein, The system further comprises a second circulating pump (409) and a sixth pipeline (501) provided with a seventh switch valve (502); The second circulating pump (409) is arranged on the fifth pipeline (408) and located between the online monitoring device (403) and the sixth switch valve (406); a water inlet of the sixth pipeline (501) is arranged on the fifth pipeline (408) and located between the second circulating pump (409) and the sixth switch valve (406); The sixth pipeline (501) can be used to recycle the wastewater treated by the ion exchange resin packed tower back to the storage tank (101); the second circulating pump (409) can be used to pump the wastewater treated by the ion exchange resin packed tower into the storage tank (101) or directly discharge.

9. The system of claim 3, wherein, The first regulating valve (304) is a self-operated valve after pressure regulating valve.

10. The system of claim 4, wherein, The second regulating valve (309) is a self-operated valve before pressure regulating valve.

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