CN216397501U - Miscellaneous salt processing apparatus - Google Patents
Miscellaneous salt processing apparatus Download PDFInfo
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- CN216397501U CN216397501U CN202122684431.2U CN202122684431U CN216397501U CN 216397501 U CN216397501 U CN 216397501U CN 202122684431 U CN202122684431 U CN 202122684431U CN 216397501 U CN216397501 U CN 216397501U
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Abstract
The utility model discloses a mixed salt processing device, comprising: the system comprises a first salt dissolving system, a salt separating system, a drying system and a pyrolysis system, wherein the first salt dissolving system is used for dissolving miscellaneous salts to form miscellaneous salt solutions, the salt separating system is used for separating at least partial salts in the miscellaneous salt solutions formed by the first salt dissolving system, the miscellaneous salt solutions left after the separation of at least partial salts are miscellaneous salt mother liquor, the drying system is used for drying the miscellaneous salt mother liquor to obtain dried miscellaneous salts, the pyrolysis system is used for removing organic matters in the dried miscellaneous salts to obtain the pyrolyzed miscellaneous salts, a discharge port of the first salt dissolving system is communicated with a feed port of the salt separating system, a first discharge port of the salt separating system is communicated with a feed port of the drying system, a discharge port of the drying system is communicated with a feed port of the pyrolysis system, and a discharge port of the pyrolysis system is communicated with a feed port of the first salt dissolving system. The method can reduce the treatment cost of the miscellaneous salt with low organic matter content, improve the utilization rate of the miscellaneous salt and meet the requirement of zero discharge of wastewater.
Description
Technical Field
The utility model relates to the field of mixed salt treatment, in particular to a mixed salt treatment device.
Background
In recent years, with the rapid development of economy in China, the amount of miscellaneous salt generated in the wastewater treatment process in the industries of home and abroad electric power petrochemical industry, coal chemical industry and the like also shows a continuously increasing trend, the annual output of miscellaneous salt exceeds 2000 million tons at present, the miscellaneous salt is qualified as dangerous waste, and the national environmental protection department requires strict control. The untreated miscellaneous salt has the characteristic of being easy to be leached and dissolved, can directly affect surface water and underground water, destroys the surrounding ecological environment, causes salinization of soil and harms the health of human bodies. Therefore, whether the miscellaneous salt can be properly treated and utilized becomes a key part in the wastewater zero discharge link.
The mixed salt mainly comprises inorganic salt, organic matters and inorganic impurity ions, and the treatment mode adopted by the conventional mixed salt treatment device is mainly as follows: firstly, the miscellaneous salt is burnt at high temperature to decompose organic matters in the miscellaneous salt, and then the miscellaneous salt which is burnt at high temperature is dissolved and purified.
SUMMERY OF THE UTILITY MODEL
However, the above-mentioned miscellaneous salt treatment apparatus is suitable for miscellaneous salts having a high organic matter content, and can remove a large amount of organic matters contained in miscellaneous salts at the time of high-temperature incineration. However, when the organic matter content of the miscellaneous salt is low (the organic matter content is less than 1000mg/L), the miscellaneous salt is mainly inorganic salt and contains a small amount of organic matter, and the high-temperature incineration needs to be carried out on a large amount of miscellaneous salt by using the miscellaneous salt treatment device, so that the requirement on the capacity specification of the high-temperature incineration device is provided, the device installation cost is increased, the energy consumption is increased due to the high-temperature incineration of a large amount of miscellaneous salt, and the device operation cost is increased, so that the economy is reduced.
The utility model aims to solve the problems that the conventional mixed salt treatment device is not suitable for mixed salt with low organic content (the organic content is less than 1000mg/L) and causes overhigh mixed salt treatment cost. The utility model provides a mixed salt treatment device, which can reduce the treatment cost of the mixed salt with low organic content, meet the zero discharge requirement of wastewater and improve the utilization rate of the mixed salt.
In order to solve the technical problem, the utility model discloses a mixed salt treatment device, which comprises:
the first salt dissolving system comprises a feeding hole and a discharging hole, and is used for dissolving miscellaneous salts to form miscellaneous salt solution;
the salt separating system comprises a feeding hole and a first discharging hole, and is used for separating at least part of salt in the mixed salt solution formed by the first salt dissolving system, and the mixed salt solution left after separating at least part of salt is mixed salt mother liquor;
the drying system comprises a feed inlet and a discharge outlet, and is used for drying the mixed salt mother liquor to obtain dried mixed salt; and
the pyrolysis system comprises a feed inlet and a discharge outlet, is used for removing organic matters in the dried miscellaneous salt to obtain pyrolyzed miscellaneous salt,
the discharge port of the first salt dissolving system is communicated with the feed port of the salt separating system, the first discharge port of the salt separating system is communicated with the feed port of the drying system, the discharge port of the drying system is communicated with the feed port of the pyrolysis system, and the discharge port of the pyrolysis system is communicated with the feed port of the first salt dissolving system.
Optionally, the salt separation system comprises a freezing and/or evaporative crystallization system.
Optionally, the mixed salt treatment device further comprises a drying system, the drying system is used for drying salt separated by the salt separating system, the salt separating system further comprises a second discharge hole, the drying system comprises a feed hole, and the second discharge hole of the salt separating system is communicated with the feed hole of the drying system.
Optionally, the miscellaneous salt processing apparatus further includes a second salt dissolving system and a denitrification system, the second salt dissolving system is used for dissolving miscellaneous salt after pyrolysis to form miscellaneous salt solution, the denitrification system is used for removing nitrate ions in the miscellaneous salt solution formed by the second salt dissolving system to obtain denitrified miscellaneous salt solution, the second salt dissolving system includes a feed inlet and a discharge outlet, the denitrification system includes a feed inlet and a discharge outlet, the discharge outlet of the pyrolysis system is communicated with the feed inlet of the second salt dissolving system, the discharge outlet of the second salt dissolving system is communicated with the feed inlet of the denitrification system, and the discharge outlet of the denitrification system is communicated with the feed inlet of the first salt dissolving system.
Optionally, the mixed salt treatment device further comprises a pretreatment system, the pretreatment system is used for removing impurity ions in the mixed salt solution formed by the first salt dissolving system to obtain a pretreated mixed salt solution, the pretreatment system comprises a feed inlet and a discharge outlet, the discharge outlet of the first salt dissolving system is communicated with the feed inlet of the pretreatment system, and the discharge outlet of the pretreatment system is communicated with the feed inlet of the salt separating system.
The miscellaneous salt treatment device provided by the utility model can be used for dissolving and separating the salt of the miscellaneous salt with low organic content (the organic content is less than 1000mg/L), drying and pyrolyzing the miscellaneous salt mother liquor remaining after the salt separation, and returning the miscellaneous salt after pyrolysis to the first salt dissolving system for circulation, so that at least part of inorganic salt can be separated from the miscellaneous salt with low organic content (the organic content is less than 1000mg/L) in the salt separating system, the inorganic salt content in the miscellaneous salt mother liquor remaining after the salt separation is reduced, and the proportion of the organic matters is increased. The amount of the miscellaneous salt that needs to be burned by high temperature in the pyrolysis system is reduced, thereby reducing the setting and running cost of the device, improving the economy, and the miscellaneous salt after pyrolysis can return to the first salt dissolving system to carry out circulation treatment, so that the miscellaneous salt after pyrolysis and the miscellaneous salt which does not begin to be treated in the first salt dissolving system are separated together in the salt separating system, the utilization rate of miscellaneous salt treatment is improved, the environmental pollution caused by direct discharge is avoided, and the requirement of zero discharge of wastewater is met. The device provided by the utility model can also be directly connected in series with a water treatment zero-discharge miscellaneous salt system, and a unit for discharging miscellaneous salt on the zero-discharge system is directly connected into the device provided by the utility model for advanced treatment, so that the problem of zero discharge of wastewater is thoroughly solved.
Drawings
FIG. 1 is a device for processing miscellaneous salt according to an embodiment of the present invention.
Reference numerals:
10. a first salt dissolving system; 20. a pre-treatment system; 30. a salt separation system; 40. a drying system; 50. a pyrolysis system; 60. a second salt dissolving system; 70. a denitrification system; 80. and (4) drying the system.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the utility model will be described in conjunction with the preferred embodiments, it is not intended that the features of the utility model be limited to these embodiments. On the contrary, the intention of the novel description to be incorporated into the embodiments is to cover alternatives or modifications which may be extended in accordance with the appended claims. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The utility model may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.
In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, and are only used for convenience in describing and simplifying the description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operated, and thus, should not be construed as limiting the present invention.
The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings. All the feed inlets and discharge outlets of the utility model can be used for liquid conveying and solid conveying.
As shown in FIG. 1, the present invention discloses a mixed salt processing apparatus, comprising: the system comprises a first salt dissolving system 10, a salt separating system 30, a drying system 40 and a pyrolysis system 50, wherein the first salt dissolving system 10 is used for dissolving miscellaneous salts to form miscellaneous salt solutions, the salt separating system 30 is used for separating at least part of salts in the miscellaneous salt solutions formed by the first salt dissolving system 10, the remaining miscellaneous salt solutions after at least part of salts are separated are miscellaneous salt mother solutions, the drying system 40 is used for drying the miscellaneous salt mother solutions to obtain dried miscellaneous salts, the pyrolysis system 50 is used for removing organic matters in the dried miscellaneous salts to obtain pyrolyzed miscellaneous salts, the first salt dissolving system 10 comprises a feed inlet and a discharge outlet, the salt separating system 30 comprises a feed inlet and a first discharge outlet, the drying system 40 comprises a feed inlet and a discharge outlet, the pyrolysis system 50 comprises a feed inlet and a discharge outlet, the discharge outlet of the first salt dissolving system 10 is communicated with the feed inlet of the salt separating system 30, the first discharge outlet of the salt separating system 30 is communicated with the feed inlet of the drying system 40, the discharge port of the drying system 40 is communicated with the feed port of the pyrolysis system 50, and the discharge port of the pyrolysis system 50 is communicated with the feed port of the first salt dissolving system 10.
The miscellaneous salt with low organic matter content (the organic matter content is less than 1000mg/L) enters a first salt dissolving system 10, a proper amount of tap water or evaporation condensate is added into the first salt dissolving system 10, and the miscellaneous salt with low organic matter content is dissolved to obtain miscellaneous salt solution. The mixed salt solution formed by the first salt dissolving system 10 enters the salt separating system 30 through the discharge port of the first salt dissolving system 10 and the feed port of the salt separating system 30, the salt separating system 30 separates at least part of salt from the mixed salt solution, and the residual mixed salt solution is mixed salt mother liquor, and the mixed salt mother liquor comprises organic matters and salt which is not separated out. In the salt separating system 30, different salt separating processes are selected according to different compositions of low organic content miscellaneous salt (the organic content is less than 1000mg/L) components to obtain different salts and miscellaneous salt mother liquor. The mixed salt mother liquor enters the drying system 40 through the first discharge port of the salt separating system 30 and the feed port of the drying system 40 in sequence to remove moisture, and the drying is usually performed by a centrifugal drying process. The dried miscellaneous salt enters the pyrolysis system 50 through the discharge hole of the drying system 40 and the feed hole of the pyrolysis system 50 in sequence to be incinerated at high temperature, and organic matters in the dried miscellaneous salt are removed through pyrolysis. Because the proportion of organic matters in the miscellaneous salt obtained after salt separation and drying is increased, the quantity of the miscellaneous salt needing pyrolysis treatment is reduced, the requirement on the capacity of a pyrolysis device is low, the operation cost is low, and the expense for treating the miscellaneous salt is effectively reduced. The miscellaneous salt after pyrolysis returns to the first salt dissolving system 10 again through the discharge hole of the pyrolysis system 50 and the feed inlet of the first salt dissolving system 10, and is dissolved together with the miscellaneous salt which is not treated in the first salt dissolving system 10 and is separated from the salt separating system 30, so that the utilization rate of miscellaneous salt treatment is improved, the environmental pollution caused by direct discharge is avoided, and the requirement of zero discharge of wastewater is met.
Specifically, the salt separation system 30 includes a freezing and/or evaporative crystallization system.
The miscellaneous salts include inorganic salts such as sodium sulfate and/or sodium chloride, and the salt separation system 30 can effectively separate the sodium sulfate and/or sodium chloride when the salt separation system includes a freezing and/or evaporative crystallization system.
Specifically, the mixed salt treatment device further comprises a drying system 80, the drying system 80 is used for drying the salt separated by the salt separating system 30 to obtain the finished salt, the salt separating system 30 further comprises a second discharge port, the drying system 80 comprises a feed port, the second discharge port of the salt separating system 30 is communicated with the feed port of the drying system 80, and the salt separated by the salt separating system 30 enters the drying system 80 via the second discharge port of the salt separating system 30 and the feed port of the drying system 80 to be dried to obtain the finished salt.
Specifically, the miscellaneous salt processing apparatus further includes a second salt dissolving system 60 and a denitrification system 70, wherein the second salt dissolving system 60 is used for dissolving the miscellaneous salt after pyrolysis to form a miscellaneous salt solution, the denitrification system 70 is used for removing nitrate ions in the miscellaneous salt solution formed by the second salt dissolving system 60 to obtain the denitrified miscellaneous salt solution, the second salt dissolving system 60 includes a feed inlet and a discharge outlet, the denitrification system 70 includes a feed inlet and a discharge outlet, the discharge outlet of the pyrolysis system 50 is communicated with the feed inlet of the second salt dissolving system 60, the discharge outlet of the second salt dissolving system 60 is communicated with the feed inlet of the denitrification system 70, and the discharge outlet of the denitrification system 70 is communicated with the feed inlet of the first salt dissolving system 10.
The miscellaneous salt after pyrolysis enters the salt dissolving system through the discharge hole of the pyrolysis system 50 and the feed inlet of the second salt dissolving system 60 in sequence to be dissolved into miscellaneous salt solution, the miscellaneous salt solution formed by the second salt dissolving system 60 enters the denitrification system 70 through the discharge hole of the second salt dissolving system 60 and the feed inlet of the denitrification system 70 in sequence, the denitrification system 70 removes nitrate by a high-salt-resistant microbial denitrification process, the denitrification efficiency is high, and the miscellaneous salt solution after denitrification returns to the first salt dissolving system 10 through the discharge hole of the denitrification system 70 and the feed inlet of the first salt dissolving system 10 to be subjected to circulating treatment.
Specifically, the mixed salt treatment device further comprises a pretreatment system 20, the pretreatment system 20 is used for removing impurity ions in the mixed salt solution formed by the first salt dissolving system 10 to obtain a pretreated mixed salt solution, the pretreatment system 20 comprises a feed inlet and a discharge outlet, the discharge outlet of the first salt dissolving system 10 is communicated with the feed inlet of the pretreatment system 20, and the discharge outlet of the pretreatment system 20 is communicated with the feed inlet of the salt separating system 30.
The miscellaneous salt solution formed by the first salt dissolving system 10 enters the pretreatment system 20 through the discharge hole of the first salt dissolving system 10 and the feed hole of the pretreatment system 20 in sequence to remove impurities and complete purification, and the specific purification process comprises the following steps: adding chemical agents such as alkali, soda ash, coagulant aid, silicon remover and the like to remove impurity ions such as calcium, magnesium, silicon, heavy metals, alkalinity and the like in the mixed salt solution formed by the first salt dissolving system 10, removing SS (suspended substances) through a precipitation or filtration device, and performing advanced treatment on residual trace metal elements through ion exchange resin. The pretreated mixed salt solution enters the salt separating system 30 through the discharge hole of the pretreatment system 20 and the feed hole of the salt separating system 30 in sequence, and the separation of salt is started.
According to the embodiment, the low organic content miscellaneous salt (organic content is less than 1000mg/L) enters the first salt dissolving system 10 and is dissolved into miscellaneous salt solution by tap water or evaporation condensate, the miscellaneous salt solution formed by the first salt dissolving system 10 enters the pretreatment system 20 to remove impurities, the pretreated miscellaneous salt solution enters the salt separating system 30 to be separated into at least partial salt, the salt separated by the salt separating system 30 enters the drying system 80 to be dried to obtain finished salt, the miscellaneous salt mother liquor left after the salt separating system 30 separates into salt enters the drying system 40 to be dehydrated to obtain dried miscellaneous salt, the dried miscellaneous salt enters the pyrolysis system 50 to be incinerated at high temperature to remove organic matters, the pyrolyzed miscellaneous salt enters the second salt dissolving system 60 to be dissolved into miscellaneous salt solution, the miscellaneous salt solution formed by the second salt dissolving system 60 enters the denitrification system 70 to be removed with nitrate, and the denitrified miscellaneous salt solution returns to the first salt dissolving system 10.
According to the miscellaneous salt treatment device provided by the utility model, the miscellaneous salt with low organic content (the organic content is less than 1000mg/L) is subjected to treatment of dissolving and separating salt firstly, then the miscellaneous salt mother liquor obtained by separating salt is dried and pyrolyzed, and the pyrolyzed miscellaneous salt is returned to the first salt dissolving system 10 for circulation, so that the inorganic salt content of the miscellaneous salt which is separated from salt and dried is reduced and the organic content is increased compared with the miscellaneous salt which is not treated, on the premise of pyrolyzing the organic matter with the same amount, the amount of the miscellaneous salt which needs to be burned at high temperature in the pyrolysis system 50 is reduced, the setting and operating cost of the device is reduced, the economy is improved, and the miscellaneous salt after pyrolysis is returned to the first salt dissolving system 10 for circulation treatment, so that the utilization rate of the miscellaneous salt is improved, and the requirement of zero discharge of wastewater is met. The device can also be directly connected in series with a water treatment zero-discharge miscellaneous salt system, and a unit for discharging miscellaneous salt on the zero-discharge system is directly connected into the device provided by the utility model for advanced treatment, so that the problem of zero discharge of wastewater is thoroughly solved.
While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the utility model, taken in conjunction with the specific embodiments thereof, and that no limitation of the utility model is intended thereby. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the utility model.
Claims (5)
1. A miscellaneous salt treatment apparatus, comprising:
the first salt dissolving system comprises a feeding hole and a discharging hole, and is used for dissolving miscellaneous salts to form miscellaneous salt solution;
the salt separating system comprises a feeding hole and a first discharging hole, and is used for separating at least part of salt in the mixed salt solution formed by the first salt dissolving system, and the mixed salt solution left after separating at least part of salt is mixed salt mother liquor;
the drying system comprises a feed inlet and a discharge outlet, and is used for drying the mixed salt mother liquor to obtain dried mixed salt; and
the pyrolysis system comprises a feed inlet and a discharge outlet, the pyrolysis system is used for removing organic matters in the dried miscellaneous salt to obtain pyrolyzed miscellaneous salt,
the discharge hole of the first salt dissolving system is communicated with the feed hole of the salt separating system, the first discharge hole of the salt separating system is communicated with the feed hole of the drying system, the discharge hole of the drying system is communicated with the feed hole of the pyrolysis system, and the discharge hole of the pyrolysis system is communicated with the feed hole of the first salt dissolving system.
2. A miscellaneous salt treatment plant as claimed in claim 1, characterized in that the salt separation system comprises a freezing and/or evaporative crystallization system.
3. A mixed salt processing device as claimed in claim 1, wherein the mixed salt processing device further comprises a drying system, the drying system is used for drying the salt separated by the salt separating system, the salt separating system further comprises a second discharge port, the drying system comprises a feed port, and the second discharge port of the salt separating system is communicated with the feed port of the drying system.
4. A mixed salt processing device as claimed in any one of claims 1 to 3, wherein the mixed salt processing device further comprises a second salt dissolving system and a denitrification system, the second salt dissolving system is used for dissolving the pyrolyzed mixed salt to form a mixed salt solution, the denitrification system is used for removing nitrate ions in the mixed salt solution formed by the second salt dissolving system to obtain a denitrified mixed salt solution, the second salt dissolving system comprises a feed inlet and a discharge outlet, the denitrification system comprises a feed inlet and a discharge outlet, the discharge outlet of the pyrolysis system is communicated with the feed inlet of the second salt dissolving system, the discharge outlet of the second salt dissolving system is communicated with the feed inlet of the denitrification system, and the discharge outlet of the denitrification system is communicated with the feed inlet of the first salt dissolving system.
5. A mixed salt processing device as claimed in any one of claims 1 to 3, further comprising a pretreatment system for removing impurity ions from the mixed salt solution formed by the first salt dissolving system to obtain a pretreated mixed salt solution, wherein the pretreatment system comprises a feed inlet and a discharge outlet, the discharge outlet of the first salt dissolving system is communicated with the feed inlet of the pretreatment system, and the discharge outlet of the pretreatment system is communicated with the feed inlet of the salt separating system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122684431.2U CN216397501U (en) | 2021-11-04 | 2021-11-04 | Miscellaneous salt processing apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122684431.2U CN216397501U (en) | 2021-11-04 | 2021-11-04 | Miscellaneous salt processing apparatus |
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| CN216397501U true CN216397501U (en) | 2022-04-29 |
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| CN202122684431.2U Active CN216397501U (en) | 2021-11-04 | 2021-11-04 | Miscellaneous salt processing apparatus |
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- 2021-11-04 CN CN202122684431.2U patent/CN216397501U/en active Active
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