CN217377352U - MVR evaporation crystallization equipment - Google Patents
MVR evaporation crystallization equipment Download PDFInfo
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- CN217377352U CN217377352U CN202220393406.0U CN202220393406U CN217377352U CN 217377352 U CN217377352 U CN 217377352U CN 202220393406 U CN202220393406 U CN 202220393406U CN 217377352 U CN217377352 U CN 217377352U
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Abstract
The utility model relates to the field of wastewater treatment, and provides MVR evaporation crystallization equipment, which comprises a steam compressor, a multiple-effect falling film evaporation and separation device, a forced circulation evaporator and a crystallization separator; the outlet of the vapor compressor is respectively connected with the shell pass of the multi-effect falling film evaporation and separation device and the shell pass of the forced circulation evaporator so as to convey saturated vapor; the tube pass of the multi-effect falling film evaporation and separation device, the tube pass of the forced circulation evaporator and the crystallization separator are sequentially connected to convey wastewater to be treated; the crystallization separator is connected with the multi-effect falling film evaporation separation device to convey secondary steam, and the multi-effect falling film evaporation separation device is connected with an inlet of the steam compressor to convey the secondary steam. High-grade saturated steam output by the steam compressor is directly sent into the shell pass of the multi-effect falling film evaporation separation device and the shell pass of the forced circulation evaporator for wastewater treatment, so that the saturated steam is not obviously cooled, the forced circulation evaporation efficiency is improved, and the cost of the forced circulation evaporation equipment is effectively reduced.
Description
Technical Field
The utility model relates to a waste water treatment field especially relates to a MVR evaporation crystallization equipment.
Background
At present, the rapid development of new energy markets has increased the demand of power batteries, energy storage materials or equipment, and thus the demand of battery anode materials is also rapidly increased. The anode material is subjected to synthesis, washing and other processes in the production process, the main component of the generated wastewater is high-salt inorganic wastewater, the treatment difficulty is high, and the discharge of the wastewater can cause serious damage and influence on the surrounding environment. At present, the high-salinity wastewater is generally treated by an evaporation concentration process, and the evaporation crystallization process can adopt multiple-effect evaporation, MVR (mechanical vapor recompression) evaporation or a combination of the multiple-effect evaporation and the MVR.
Aiming at the existing MVR evaporation crystallization equipment, a steam washing tower is required to be arranged on a secondary steam pipeline to protect a compressor, and the safe and stable operation of the compressor is prevented from being influenced by material channeling under abnormal working conditions, but the method increases the civil construction floor area and the equipment and civil construction cost; in addition, the saturated vapor of the compressor is generally sent to the forced circulation evaporation after passing through the falling film evaporation device, which causes the temperature of the saturated vapor to be reduced, the efficiency of the forced circulation evaporation to be reduced and the cost of the forced circulation evaporation device to be higher.
SUMMERY OF THE UTILITY MODEL
The utility model provides a MVR evaporation crystallization equipment for solve prior art compressor saturated steam and send into forced circulation evaporation after falling liquid film evaporation equipment again, lead to the saturated steam temperature to reduce, forced circulation evaporation efficiency descends and the higher defect of forced circulation evaporation equipment cost.
The utility model provides MVR evaporation crystallization equipment, which comprises a steam compressor, a multiple-effect falling film evaporation and separation device, a forced circulation evaporator and a crystallization separator; the outlet of the steam compressor is respectively connected with the shell pass of the multi-effect falling film evaporation and separation device and the shell pass of the forced circulation evaporator and is used for conveying saturated steam; the tube pass of the multi-effect falling film evaporation and separation device, the tube pass of the forced circulation evaporator and the crystallization separator are sequentially connected and used for conveying wastewater to be treated; the crystallization separator is also connected with the multi-effect falling film evaporation and separation device for conveying secondary steam, and the multi-effect falling film evaporation and separation device is also connected with an inlet of the steam compressor for conveying secondary steam.
According to the utility model provides a MVR evaporation crystallization equipment, multiple effect falling film evaporation and separation device includes that one imitates falling film evaporation and separation unit and two imitates falling film evaporation and separation unit, wherein, one imitates falling film evaporation and separation unit with two imitate falling film evaporation and separation unit series connection each other.
According to the utility model provides a MVR evaporation crystallization equipment, an effect falling film evaporation and separation unit includes interconnect's an effect falling film evaporator and an effect falling film separator, two effect falling film evaporation and separation units include interconnect's two effect falling film evaporator and two effect falling film separator.
According to the utility model provides a MVR evaporation crystallization equipment, vapor compressor's export with the shell side of an effect falling film evaporation ware is connected, the top of an effect falling film separator with the shell side of a two effect falling film evaporation ware is connected, the bottom of a two effect falling film separator with the crystallization separator is connected, and the top with vapor compressor's entry linkage.
According to the utility model provides a MVR evaporation crystallization equipment, the tube side of one effect falling film evaporator is used for introducing pending waste water, and with the tube side of two effect falling film evaporator is connected, the bottom of two effect falling film evaporator with the forced circulation evaporimeter is connected.
According to the utility model provides a MVR evaporation crystallization equipment, the crystallization separator with form circulation circuit between the tube side of forced circulation evaporimeter, wherein, be provided with the forced circulation pump in the circulation circuit, and the bottom of two-effect falling film evaporation ware with circulation circuit connects.
According to the utility model provides a MVR evaporation crystallization equipment, two effect fall the inside silk screen demister that is provided with in top side of membrane separator.
According to the utility model provides a MVR evaporation crystallization equipment, still be provided with magma discharge pipeline on the crystallization separator.
According to the utility model provides a MVR evaporation crystallization equipment, still be provided with the comdenstion water discharge line on the forced circulation evaporimeter.
According to the utility model provides a MVR evaporation crystallization equipment, one imitate falling film evaporation ware with still be provided with comdenstion water discharge line on the two imitate falling film evaporation ware respectively.
The utility model provides an among the MVR evaporation crystallization equipment, the tube side of multiple effect falling liquid film evaporation and separation device, forced circulation evaporimeter's tube side and crystal separator connect gradually and are used for carrying pending waste water. The outlet of the vapor compressor is respectively connected with the shell pass of the multi-effect falling film evaporation and separation device and the shell pass of the forced circulation evaporator, and is used for conveying saturated vapor which exchanges heat with the wastewater to be treated. After the reaction, the crystallization separator delivers the secondary steam to a multi-effect falling-film evaporation separation device connected thereto, and the multi-effect falling-film evaporation separation device delivers the secondary steam to an inlet of a vapor compressor connected thereto. In the process, high-grade saturated steam output by the steam compressor is directly sent to the shell pass of the multi-effect falling film evaporation separation device and the shell pass of the forced circulation evaporator for wastewater treatment, so that the saturated steam is prevented from being obviously cooled, the forced circulation evaporation efficiency is improved, and the cost of the forced circulation evaporation equipment can be effectively reduced.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic block diagram of an MVR evaporative crystallization apparatus provided by the present invention;
reference numerals:
100: MVR evaporative crystallization equipment; 102: a vapor compressor; 104: a multi-effect falling film evaporation separation device; 106: a forced circulation evaporator; 108: a crystallization separator; 110: a first effect falling film evaporation separation unit; 112: a double effect falling film evaporation separation unit; 114: a one-effect falling film evaporator; 116: a first effect falling film separator; 118: a dual-effect falling film evaporator; 120: a double-effect falling film separator; 122: a circulation loop; 124: a forced circulation pump; 126: a wire mesh demister; 128: crystal slurry discharging pipeline.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are provided to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Referring now to fig. 1, embodiments of the present invention will be described. It should be understood that the following description is only exemplary of the present invention and is not intended to limit the present invention in any way.
As shown in fig. 1, an embodiment of the present invention provides an MVR evaporative crystallization apparatus 100. The MVR evaporative crystallization apparatus 100 may generally include a vapor compressor 102, a multi-effect falling film evaporative separation device 104, a forced circulation evaporator 106, and a crystallization separator 108.
Specifically, in an embodiment of the present invention, the tube side of the multiple-effect falling film evaporation separation device 104, the tube side of the forced circulation evaporator 106, and the crystallization separator 108 may be connected in sequence, so as to be used to transport wastewater to be treated. Correspondingly, the outlet of the vapor compressor 102 is connected with the shell side of the multi-effect falling film evaporation and separation device 104 and the shell side of the forced circulation evaporator 106 respectively, so that saturated vapor which exchanges heat with the wastewater to be treated can be conveyed.
After the reaction, the crystallization separator 108 may deliver secondary steam to the multi-effect falling film evaporation separation device 104 connected thereto; and further, the multi-effect falling film evaporation separation device 104 can convey the secondary steam to the inlet of the steam compressor 102 connected with the multi-effect falling film evaporation separation device, so that the secondary steam with low grade is processed into saturated steam with high grade by the steam compressor 102 for reuse.
As can be seen from the above embodiments, in this process, the high-grade saturated steam output by the steam compressor 102 is directly sent to the shell side of the multiple-effect falling-film evaporation separation device 104 and the shell side of the forced circulation evaporator 106 for wastewater treatment, so that it is ensured that the saturated steam is not completely introduced into the falling-film evaporation separation device to be significantly cooled as in the prior art, the forced circulation evaporation efficiency is improved, and the cost of the forced circulation evaporation device is effectively reduced.
With further reference to fig. 1, in an embodiment of the present invention, the multi-effect falling film evaporation separation device 104 as described above may, for example, include a single-effect falling film evaporation separation unit 110 and a double-effect falling film evaporation separation unit 112. Specifically, the single-effect falling film evaporation separation unit 110 and the double-effect falling film evaporation separation unit 112 may be connected in series with each other, thereby forming a multi-effect falling film evaporation separation. It should be understood that the number of units included in the multi-effect falling film evaporation separation device 104 can be selected according to the specific application scenario and the actual use situation, and the above-mentioned single-effect falling film evaporation separation unit 110 and double-effect falling film evaporation separation unit 112 are only one exemplary embodiment of the present invention, and the present invention is not limited to the above-mentioned embodiments.
The exemplary embodiment of the present invention will be described below by taking as an example the multi-effect falling film evaporation and separation device 104 including the single-effect falling film evaporation and separation unit 110 and the double-effect falling film evaporation and separation unit 112.
In such an embodiment, the single-effect falling film evaporation separation unit 110 can include a single-effect falling film evaporator 114 and a single-effect falling film separator 116 connected to each other. Correspondingly, the dual-effect falling-film evaporation and separation unit 112 may include a dual-effect falling-film evaporator 118 and a dual-effect falling-film separator 120 connected to each other.
Specifically, in an embodiment of the present invention, for the steam line orientation in the MVR evaporative crystallization apparatus 100, the outlet of the steam compressor 102 may be connected to the shell side of the one-effect falling-film evaporator 114, and the top of the one-effect falling-film separator 116 may be connected to the shell side of the two-effect falling-film evaporator 118. Further, the bottom of the dual effect falling film separator 120 may be connected to the crystallization separator 108, and the top of the dual effect falling film separator 120 may be connected to the inlet of the vapor compressor 102.
In the case of the feed liquid pipeline in the MVR evaporative crystallization apparatus 100, i.e. the high-salt wastewater pipeline to be treated, the tube side of the one-effect falling-film evaporator 114 can be used for introducing the high-salt wastewater to be treated and is connected with the tube side of the two-effect falling-film evaporator 118. Further, the bottom of the dual-effect falling-film evaporator 118 may be interconnected with the forced circulation evaporator 106. Furthermore, as shown in fig. 1, in the embodiment of the present invention, a circulation loop 122 may be formed between the tube pass of the crystallization separator 108 and the forced circulation evaporator 106. Specifically, a forced circulation pump 124 may be provided in the circulation loop 122, and the bottom of the dual-effect falling-film evaporator 118 may be connected with the circulation loop 1122.
In an alternative embodiment of the present invention, a wire mesh demister 126 may be provided inside the top side of the dual-effect falling film separator 120. During the actual wastewater treatment, the wire mesh demister 126 arranged in the dual-effect falling film separator 120 can avoid a horizontal secondary separator arranged on a secondary steam pipeline of the steam inlet compressor 102, thereby effectively reducing the equipment investment cost.
With continued reference to fig. 1, in an embodiment of the present invention, a slurry outlet line 128 may also be disposed on the crystallization separator 108. Also, a condensed water drain line (not shown) may be further provided on the forced circulation evaporator 106, and condensed water drain lines (not shown) may be further provided on the one-effect falling-film evaporator 114 and the two-effect falling-film evaporator 118, respectively.
The following description will be made of a specific usage process of the MVR evaporative crystallization apparatus 100 of the present invention, using fig. 1 as an example. It is to be understood that the following description is only exemplary of the present invention and is not intended to limit the present invention in any way.
It is also noted herein that the solid line portions of fig. 1 represent vapor lines and the dashed line portions represent feed liquid lines in order to more clearly distinguish between vapor lines and feed liquid lines.
Specifically, as shown in fig. 1, in performing high salt wastewater treatment, a high salt wastewater feed is introduced into the tube side of the one-effect falling-film evaporator 114. Saturated vapor at the outlet of the vapor compressor 102 enters the shell side of the single-effect falling-film evaporator 114 and the shell side of the forced circulation evaporator 106.
Next, the secondary steam generated by the single-effect falling-film evaporator 114 is subjected to gas-liquid separation by the single-effect falling-film separator 116, and enters the shell pass of the dual-effect falling-film evaporator 118 as the heating steam of the dual-effect falling-film evaporator 118, and the separated liquid and feed liquid enter the tube pass of the dual-effect falling-film evaporator 118. Further, the secondary steam generated by the dual-effect falling-film evaporator 118 is separated into gas and liquid by the dual-effect falling-film separator 120, and the separated liquid and the feed liquid are pumped to the forced circulation evaporator 106 by the forced circulation pump 124.
After heat exchange is performed between the feed liquid in the forced circulation evaporator 106 and the saturated steam delivered by the steam compressor 102, the feed liquid is flashed in the crystallization separator 108 to generate secondary steam, the secondary steam is delivered to the dual-effect falling film separator 120 through a pipeline, and the generated crystal slurry is discharged outside through a crystal slurry discharge pipeline 128.
Next, the secondary steam generated by the crystallization separator 108 and the secondary steam generated by the dual-effect falling film separator 120 are collected in the dual-effect falling film separator 120, and after gas-liquid separation, the secondary steam is conveyed into the inlet of the vapor compressor 102 through a pipeline.
Then, the steam compressor 102 converts the low-grade secondary steam into high-grade saturated steam for the evaporator to heat the feed liquid by using electric energy to do work.
In conclusion, in the embodiment of the utility model provides an in the MVR evaporation crystallization equipment 100, the high-grade saturated steam of vapor compressor 102 output directly sends into the shell side of multiple-effect falling film evaporation separator 104 and the shell side of forced circulation evaporimeter 106 and is used for carrying out waste water treatment to can guarantee that saturated steam can not appear obviously cooling, make forced circulation evaporation efficiency improve and can effectively reduce forced circulation evaporation equipment's cost.
In addition, after the secondary steam generated by the dual-effect falling-film evaporator 118 and the secondary steam generated by the crystallization separator 108 are converged, the secondary steam is conveyed to the inlet of the steam compressor 102 through a pipeline by the dual-effect falling-film separator 120, so that the safety problem caused by material channeling of the compressor is solved, and meanwhile, steam washing tower equipment which is standard-matched on the pipeline at the inlet of the compressor is saved. That is, the dual-effect falling film separator 120 is used as both the gas-liquid separation device of the dual-effect falling film evaporator 118 and the steam washing tower protection device at the inlet of the steam compressor 102, so that the civil space can be saved, the safe and stable operation of the compressor can be protected, and the device and civil cost can be saved.
In addition, during the actual wastewater treatment, the wire mesh demister 126 is arranged in the dual-effect falling film separator 120, so that a horizontal secondary separator is not arranged on a secondary steam pipeline of the steam inlet compressor 102, and the equipment investment cost can be effectively reduced.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The MVR evaporation crystallization equipment is characterized by comprising a vapor compressor, a multi-effect falling film evaporation separation device, a forced circulation evaporator and a crystallization separator;
the outlet of the steam compressor is respectively connected with the shell pass of the multi-effect falling film evaporation and separation device and the shell pass of the forced circulation evaporator and is used for conveying saturated steam;
the tube pass of the multi-effect falling film evaporation and separation device, the tube pass of the forced circulation evaporator and the crystallization separator are sequentially connected and used for conveying wastewater to be treated;
the crystallization separator is also connected with the multi-effect falling film evaporation and separation device for conveying secondary steam, and the multi-effect falling film evaporation and separation device is also connected with an inlet of the steam compressor for conveying secondary steam.
2. The MVR evaporative crystallization apparatus of claim 1, wherein the multi-effect falling film evaporative separation device comprises a single-effect falling film evaporative separation unit and a double-effect falling film evaporative separation unit,
wherein the single-effect falling film evaporation separation unit and the double-effect falling film evaporation separation unit are connected in series with each other.
3. The MVR evaporative crystallization apparatus of claim 2, wherein the single-effect falling film evaporative separation unit comprises a single-effect falling film evaporator and a single-effect falling film separator connected to each other, and the dual-effect falling film evaporative separation unit comprises a dual-effect falling film evaporator and a dual-effect falling film separator connected to each other.
4. The MVR evaporative crystallization apparatus of claim 3, wherein the outlet of the vapor compressor is connected to the shell side of the primary falling film evaporator, the top of the primary falling film separator is connected to the shell side of the secondary falling film evaporator, the bottom of the secondary falling film separator is connected to the crystallization separator, and the top is connected to the inlet of the vapor compressor.
5. The MVR evaporative crystallization apparatus of claim 4, wherein the tube side of the one-effect falling-film evaporator is used for introducing wastewater to be treated and is connected with the tube side of the two-effect falling-film evaporator, and the bottom of the two-effect falling-film evaporator is connected with the forced circulation evaporator.
6. The MVR evaporative crystallization apparatus according to claim 5, wherein a circulation loop is formed between the tube side of the crystallization separator and the forced circulation evaporator,
wherein a forced circulation pump is arranged in the circulation loop, and the bottom of the two-effect falling-film evaporator is connected with the circulation loop.
7. The MVR evaporative crystallization apparatus of any one of claims 3 to 6, wherein a wire mesh demister is disposed inside the top side of the dual-effect falling film separator.
8. The MVR evaporative crystallization apparatus according to any one of claims 1 to 6, wherein a crystal slurry discharge pipeline is further provided on the crystallization separator.
9. The MVR evaporative crystallization apparatus according to any one of claims 1 to 6, wherein a condensed water discharge pipeline is further provided on the forced circulation evaporator.
10. The MVR evaporative crystallization apparatus according to any one of claims 3 to 6, wherein the first-effect falling-film evaporator and the second-effect falling-film evaporator are further provided with a condensed water discharge pipeline respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220393406.0U CN217377352U (en) | 2022-02-25 | 2022-02-25 | MVR evaporation crystallization equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220393406.0U CN217377352U (en) | 2022-02-25 | 2022-02-25 | MVR evaporation crystallization equipment |
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| CN217377352U true CN217377352U (en) | 2022-09-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116062775B (en) * | 2023-02-17 | 2024-06-04 | 中国天辰工程有限公司 | Ammonium sulfate evaporation crystallization process and system |
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- 2022-02-25 CN CN202220393406.0U patent/CN217377352U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116062775B (en) * | 2023-02-17 | 2024-06-04 | 中国天辰工程有限公司 | Ammonium sulfate evaporation crystallization process and system |
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