CN211999190U - Quenching water purification device, quenching water purification system and quenching water purification detection system - Google Patents
Quenching water purification device, quenching water purification system and quenching water purification detection system Download PDFInfo
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- CN211999190U CN211999190U CN202020307507.2U CN202020307507U CN211999190U CN 211999190 U CN211999190 U CN 211999190U CN 202020307507 U CN202020307507 U CN 202020307507U CN 211999190 U CN211999190 U CN 211999190U
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Abstract
The utility model relates to a quench water technical field specifically relates to quench water purifier, quench water purification system and quench water purification detecting system. Quench water purification installation is including establishing ties in proper order so that quench water can flow through's first oil water separator, the filter, coalescer and second oil water separator in order, first oil water separator sets up to be used for the oil and the impurity of preliminary separation quench water, the filter sets up to be used for further filtering the impurity in the quench water, the coalescer sets up to be used for forming great oil globule with the coalescence of remaining oil molecule in the quench water to realize oil, separation of water, the remaining oil in second oil water separator sets up to be used for further separating the quench water. The utility model discloses a quench water purification installation can carry out fine purification to quench water, and then makes the measured result of PH analysis appearance more accurate to it is more suitable to guarantee the alkali lye volume of pouring into, makes quench water system pH value can control in the technological index within range.
Description
Technical Field
The utility model relates to a quench water technical field specifically relates to quench water purifier, quench water purification system and quench water purification detecting system.
Background
In the process of preparing olefin from methanol, a quenching water circulation system takes quenching water as a medium, the MTP (methanol to propylene) reactor product is cooled by a waste heat recovery system and is cooled by a pre-quenching tower and a quenching tower in two stages, and then dilution steam contained in the product is condensed to form the quenching water. Most of the quenching water bears important energy circulation for recovering heat of the reaction section and conveying the heat to each reboiler of the rectification section, and is very important for energy balance and waste heat recovery of the methanol-to-olefin device. A small portion of the quench water is used in part as process water for generating process steam and another portion is passed to a methanol recovery column. In addition to the formation of olefins and a large amount of process water, small amounts of organic acids, such as acetic and propionic acids, are formed by the reaction under the action of the MTP reactor zeolite-based catalyst. The aqueous solution of acid is corrosive, and reboilers of the rectification section which take the quenching water as a heat source are all carbon steel heat exchangers, so that the control of the pH value of the quenching water is particularly important.
In the production process, the pH value of quenching water is too high, so that emulsification can occur, and oil-water separation is difficult. When the quenching water is used as the heat source of the heat exchanger, the heat exchanger is easy to scale, and the heat exchange effect is influenced. Quenching water is used as process water, and the heat exchange effect of a heat exchanger of the steam generation system is influenced due to the rising of oil content, so that the amount of generated dilution steam is reduced, the amount of externally supplemented medium-pressure steam is increased, the discharge capacity of the dilution steam system is increased, the energy consumption of the device is increased, and after the dilution steam generation system is entered, the dilution steam is brought with oil, and the dilution steam with oil can generate coke under the high-temperature condition when entering a feed gas heating furnace, so that the furnace tube is seriously coked. The pH value of the quenching water is too low, and organic acid generated by the reaction corrodes equipment, so that the risk of leakage of equipment is increased. Therefore, the control of the pH of the quenching water directly influences whether the device can run safely and smoothly.
In the process operation, NaOH solution with the concentration of about 10% is conveyed to a quenching water inlet pipe of a quenching tower and a pre-quenching tower through an alkaline liquid pump for neutralization. The pH value of the quenching water is controlled to be 7-9. The injection amount of the alkali liquor is proper, the pH value of the quenching water is controlled to be within the process index range, and a pH on-line analyzer at the bottom of the pre-quenching tower needs to be referred. In actual operation, because the oil and solid content in the quenching water are high, the online pH analyzer for quenching water has large display error and large fluctuation range, and cannot work normally. The offline analysis of the quenching water is 1 time per day, so that the change condition of the pH value of the quenching water cannot be timely mastered, the adjustment of the quenching water is relatively lagged, the pH value of a quenching water system is easily fluctuated greatly, and the normal operation of the device is seriously influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the quench water quality of water that exists among the prior art poor and influence the accuracy of PH analysis meter measurement, and then lead to the addition inaccuracy of alkali lye, make the technical problem of quench water pH value uncontrollable in the technological index within range, provide a quench water purification device, quench water purification system and quench water purification detecting system, this quench water purification device, quench water purification system and quench water purification detecting system can carry out fine purification to quench water, and then make PH analysis meter measuring result more accurate, it is more accurate to guarantee the alkali lye volume of follow-up interpolation, make quench water system pH value can control in the technological index within range.
In order to realize the above-mentioned purpose, the utility model provides an aspect provides a quench water purification device, it is including establishing ties in proper order so that quench water can circulate first oil water separator, filter, coalescer and second oil water separator in order, first oil water separator sets up to be used for the initial gross separation oil and impurity in the quench water, the filter sets up to be used for further filtering impurity in the quench water, the coalescer sets up to be used for with the coalescence of remaining oil molecules in the quench water forms great oil globule to realize oil, separation of water, second oil water separator sets up to be used for further separation remaining oil in the quench water.
Preferably, the quenching water purification apparatus includes a cooler disposed upstream of the first oil-water separator in a flow direction of the quenching water.
Preferably, the first oil-water separator is provided with a first drain outlet for discharging oil and a second drain outlet for discharging solid impurities.
Preferably, the quenching water inlet of the first oil-water separator is located at a middle position of the first oil-water separator, and the quenching water outlet of the first oil-water separator is located at a lower position of the first oil-water separator.
Preferably, the filter comprises a filter chamber, a housing for defining the filter chamber, a top cover covering the top opening of the housing, and a bottom cover covering the bottom opening of the housing, wherein the filter chamber is filled with a wire mesh, the quench water inlet of the filter is located on the top cover, and the quench water outlet of the filter is located on the bottom cover.
Preferably, the top cover is detachably connected with the housing.
Preferably, a third sewage draining outlet for draining oil is arranged on the coalescer.
Preferably, the second oil-water separator is provided with a fourth sewage draining outlet for draining oil and a sampling port for communicating with a pH analyzer.
The utility model discloses the second aspect provides a quench water purification system, it includes quench tower and as above quench water purification device, quench tower's quench water export with first oil water separator's quench water import intercommunication.
The utility model discloses the third aspect provides a quench water purifies detecting system, it includes the PH analysis appearance and as above quench water purification installation, the PH analysis appearance with second oil water separator intercommunication, the PH analysis appearance sets up to be used for detecting the warp quench water purification installation purifies the back the pH value of quench water.
Through the technical scheme, the first oil-water separator can preliminarily separate oil and impurity particles in the quenching water, slow down the flow velocity of the quenching water and reduce the difficulty of oil-water separation; the filter can filter out impurities in the quenching water; the coalescer can filter, break emulsion, grow up oil molecule, coalesce quench water, form the bigger oil globule finally, and realize the oil, water separation; and finally, a small amount of residual oil in the quenching water is further separated through a second oil-water separator, so that the quenching water is well purified, the measurement result of a pH analyzer is more accurate, the change condition of the pH value of the quenching water is mastered in time, the subsequent added alkali liquor amount is more accurate, the pH value of the quenching water system can be controlled within the process index range, and the whole system is ensured to operate safely and stably.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the quenching water purification device of the present invention.
Description of the reference numerals
1. A cooler; 2. a first oil-water separator; 3. a filter; 4. a coalescer; 5. a second oil-water separator.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
In the present invention, unless otherwise specified, the terms "top" and "bottom" are generally used in the orientation shown in the drawings.
An aspect of the utility model provides a quench water purification device, it is including establishing ties in proper order so that quench water can circulate first oil water separator 2, filter 3, coalescer 4 and second oil water separator 5 in order, first oil water separator 2 sets up to be used for the initial gross separation oil and impurity in the quench water, filter 3 sets up to be used for further filtering impurity in the quench water, coalescer 4 sets up to be used for with the coalescence of remaining oil molecules in the quench water forms great oil droplet to realize oil, separation of water, second oil water separator 5 sets up to be used for further separation remaining oil in the quench water.
Through the technical scheme, the first oil-water separator can preliminarily separate oil and impurity particles in the quenching water, slow down the flow velocity of the quenching water and reduce the difficulty of oil-water separation; the filter 3 can filter out impurities in the quenching water; the coalescer 4 can filter, break emulsion, grow up the oil molecule, coalesce the quench water, form the larger oil globule finally, and realize the oil, water separation; and finally, further separating residual small amount of oil in the quenching water through a second oil-water separator, thereby carrying out good purification on the quenching water, enabling the measurement result of the pH analyzer to be more accurate, timely mastering the pH value change condition of the quenching water, enabling the subsequent added alkali liquor amount to be more accurate, enabling the pH value of the quenching water to be controlled within the process index range, and ensuring the safe and stable operation of the whole production process.
Preferably, the quenching water purification device comprises a cooler 1, and the cooler 1 is arranged at the upstream of the first oil-water separator 2 along the flow direction of the quenching water. As shown in fig. 1, the cooler 1, the first oil-water separator 2, the filter 3, the coalescer 4, and the second oil-water separator 5 are sequentially connected by pipes. The quenching water inlet and the quenching water outlet of the cooler 1 are both positioned at the top end of the cooler 1.
In one embodiment, the first oil-water separator 2 is provided with a first drain outlet for discharging oil and a second drain outlet for discharging solid impurities. As shown in fig. 1, the first drain port is located at the top end of the first oil-water separator 2, and a drain line communicated with the first drain port is correspondingly arranged at the top end of the first oil-water separator 2 and used for discharging oil gathered from the chilled water; the second sewage draining port is located at the bottom end of the first oil-water separator 2, and the bottom end of the corresponding first oil-water separator 2 is provided with a sewage draining guide shower communicated with the second sewage draining port and used for discharging solid impurities separated out from the quenching water.
In one embodiment, the quench water inlet of the first oil-water separator 2 is located at a middle position of the first oil-water separator 2, and the quench water outlet of the first oil-water separator 2 is located at a lower position of the first oil-water separator 2. So that the quenching water outlet of the first oil-water separator 2 is lower than the quenching water inlet of the first oil-water separator 2, thereby avoiding the situation that oil is discharged without being fully separated.
As an embodiment, the filter 3 includes a filter chamber, a housing for defining the filter chamber, a top cover covering an opening at a top end of the housing, and a bottom cover covering an opening at a bottom end of the housing, wherein the filter chamber is filled with a wire mesh, a chilled water inlet of the filter 3 is located on the top cover, and a chilled water outlet of the filter 3 is located on the bottom cover. So that the quenching water passing through the filter 3 can be sufficiently filtered. In one embodiment, the cap is removably connected to the housing. The silk screen filled in the filter 3 can be replaced according to the working condition, and the silk screen does not need to be manufactured by special processes and materials and is simple and easy to obtain.
In one embodiment, the coalescer 4 is provided with a third drain for draining oil. The third sewage draining outlet is positioned at the top end of the coalescer 4, and a sewage draining line communicated with the third sewage draining outlet is correspondingly arranged at the top end of the coalescer 4. The quench water inlet of said coalescer 4 is located at the top end of said coalescer 4 and the quench water outlet of said coalescer 4 is located at the bottom end of said coalescer 4.
In one embodiment, the second oil-water separator 5 is provided with a fourth sewage draining outlet for draining oil and a sampling port for communicating with a PH analyzer. The fourth sewage draining exit is positioned at the top end of the second oil-water separator 5, and a sewage draining line communicated with the fourth sewage draining exit is arranged at the top end of the corresponding second oil-water separator 5 and used for draining the oil gathered from the quenching water. The sampling port is positioned at the bottom end of the second oil-water separator 5 and is used for extracting a certain amount of quenching water purified by the quenching water purification device to carry out pH value detection. And a quenching water inlet of the second oil-water separator 5 is positioned in the middle of the second oil-water separator 5.
The utility model discloses the second aspect provides a quench water purification system, it includes quench tower and as above quench water purification device, quench tower's quench water export with the quench water import intercommunication of first oil-water separator 2. Specifically, a quenching water outlet of the quenching tower is communicated with the first oil-water separator 2 through the cooler 1. And a quenching water outlet of the quenching tower is communicated with a quenching water inlet of the cooler 1 through a pipeline.
The utility model discloses the third aspect provides a quench water purifies detecting system, it includes the PH analysis appearance and as above quench water purification installation, the PH analysis appearance with second oil water separator 5 intercommunication, the PH analysis appearance sets up to be used for detecting the warp quench water purification installation purifies the back the pH value of quench water. Specifically, the PH analyzer is communicated with a sampling port of the second oil-water separator 5 to sample and detect the purified quenching water.
When the device works, cooling water with the pressure of 0.12MPa, the temperature of 96 ℃ and the temperature of 2065t/h from the bottom of the quenching tower is cooled to about 30 ℃ by cooling water with the pressure of 0.5MPa and the temperature of 25 ℃ in the cooler 1, so that the temperature of the quenching water finally entering the pH analyzer accords with the detection temperature. In quench water got into first oil water separator 2 after the cooling, oil and foreign particles in the initial gross separation quench water slowed down quench water velocity of flow through first oil water separator 2, reduced the water oil separating degree of difficulty, and the oil of gathering in the quench water is discharged from the sewage pipes at 2 tops of first oil water separator, and the solid impurity that carries in the quench water sinks to 2 bottoms of first oil water separator under the effect of gravity, drenches the discharge from the drainage. Quench water through first oil-water separator 2 gets into filter 3, and the impurity of quench water is further filtered out to the silk screen of filter 3 inside packing, and when the silk screen reached the biggest adsorption capacity, can remove the top cap with filter 3 off-line and change inside silk screen. The coalescer 4 filters, breaks emulsion, grows up oil molecules and coalesces the quenching water to finally form larger oil drops, and performs oil-water separation. The quench water still carrying part of the oil droplets enters the second oil-water separator 5, a small amount of residual oil in the quench water is further separated, and the collected oil is discharged from a sewage line at the top of the second oil-water separator 5. Through this quench water purification installation, can show the impurity that reduces the quench water before the purification and the carrying volume of oil, make quench water quality of water reach the analysis usefulness, experimental requirement of usefulness, solved because the poor multiple online PH analytical instrument that leads to of quench water quality of water shows that the error is big, fluctuation range is big and unable normal work, and process parameter can't obtain real time monitoring, the problem of regulation, has ensured steady production.
After removing oil substances from the quenching water, the oil content in the quenching water can be reduced to be below 10ppm wt. After removing solid impurities, the quenching water can meet the requirements for analysis and test. After the quenching water is subjected to solidification and oil removal, the pH analyzer of the quenching water runs well, and compared with assay analysis data, the pH analyzer has small display error and small fluctuation amplitude. Under the unchangeable condition of present quench water pH analysis appearance, this quench water purification device can effectively improve the quench water quality of water that gets into online pH analysis appearance, greatly reduced because of quench water quality of water is poor, the velocity of flow influences the accuracy that the pH analysis appearance measured greatly to ensure the accuracy of follow-up addition alkali lye, can be to quench water pH real time monitoring, adjust at any time, in order to ensure the normal operating of whole process.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. The technical idea of the utility model within the scope, can be right the utility model discloses a technical scheme carries out multiple simple variant, for example, can with the top cap with casing detachably even changes into the bottom can dismantle with the casing and be connected etc.. Including each of the specific features, are combined in any suitable manner. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.
Claims (10)
1. The quenching water purification device is characterized by comprising a first oil-water separator (2), a filter (3), a coalescer (4) and a second oil-water separator (5) which are sequentially connected in series to enable quenching water to flow in sequence, wherein the first oil-water separator (2) is used for primarily separating oil and impurities in the quenching water, the filter (3) is used for further filtering the impurities in the quenching water, the coalescer (4) is used for coalescing oil molecules remaining in the quenching water to form larger oil droplets and realizing oil-water separation, and the second oil-water separator (5) is used for further separating the oil remaining in the quenching water.
2. The quenching water purification apparatus according to claim 1, characterized in that the quenching water purification apparatus comprises a cooler (1), the cooler (1) being arranged upstream of the first oil-water separator (2) in the flow direction of the quenching water.
3. The quenching water purification apparatus according to claim 1, wherein a first drain port for discharging oil and a second drain port for discharging solid impurities are provided on the first oil-water separator (2).
4. The quenching water purification apparatus according to claim 1, wherein the quenching water inlet of the first oil-water separator (2) is located at a middle position of the first oil-water separator (2), and the quenching water outlet of the first oil-water separator (2) is located at a lower position of the first oil-water separator (2).
5. The quenching water purification apparatus according to claim 1, wherein said filter (3) comprises a filter chamber and a housing for defining said filter chamber, a top cover covering an opening at a top end of said housing and a bottom cover covering an opening at a bottom end of said housing, said filter chamber being filled with a wire mesh, a quenching water inlet of said filter (3) being located on said top cover, and a quenching water outlet of said filter (3) being located on said bottom cover.
6. The chilled water purification unit of claim 5, wherein the top cover is removably coupled to the housing.
7. Quenching water purification apparatus according to claim 1, characterized in that a third drain for oil discharge is provided on the coalescer (4).
8. The quenching water purification device according to claim 1, wherein a fourth drain outlet for discharging oil and a sampling port for communicating with a PH analyzer are provided on the second oil-water separator (5).
9. A quenching water purification system, comprising a quenching tower and the quenching water purification apparatus of any one of claims 1 to 8, wherein a quenching water outlet of the quenching tower is communicated with a quenching water inlet of the first oil-water separator (2).
10. A quenching water purification detection system, characterized by comprising a PH analyzer and a quenching water purification apparatus according to any one of claims 1 to 8, wherein the PH analyzer is in communication with the second oil-water separator (5), and the PH analyzer is configured to detect a PH value of the quenching water purified by the quenching water purification apparatus.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020307507.2U CN211999190U (en) | 2020-03-12 | 2020-03-12 | Quenching water purification device, quenching water purification system and quenching water purification detection system |
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| CN202020307507.2U CN211999190U (en) | 2020-03-12 | 2020-03-12 | Quenching water purification device, quenching water purification system and quenching water purification detection system |
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| CN211999190U true CN211999190U (en) | 2020-11-24 |
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| CN202020307507.2U Active CN211999190U (en) | 2020-03-12 | 2020-03-12 | Quenching water purification device, quenching water purification system and quenching water purification detection system |
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