CN211999076U - High-pressure-increasing hydrophobic automatic oxygenation system - Google Patents
High-pressure-increasing hydrophobic automatic oxygenation system Download PDFInfo
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- CN211999076U CN211999076U CN202020496819.2U CN202020496819U CN211999076U CN 211999076 U CN211999076 U CN 211999076U CN 202020496819 U CN202020496819 U CN 202020496819U CN 211999076 U CN211999076 U CN 211999076U
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Abstract
The utility model provides a high hydrophobic automatic oxygenation system and oxygenation method of adding, this oxygenation system includes gaseous state high hydrophobic oxygenation system that adds, oxygen-enriched water high hydrophobic oxygenation system that adds, hydrogen peroxide solution high hydrophobic oxygenation system and the automatic oxygen addition controller of PLC, the oxygenation medium of gaseous state high hydrophobic oxygenation system is the air, the oxygenation medium of oxygen-enriched water high hydrophobic oxygenation system is the oxygen-enriched water, hydrogen peroxide solution high hydrophobic oxygenation system oxygenation medium is rare hydrogen peroxide solution, hydrogen peroxide solution high hydrophobic oxygenation system also can add alkalizer to high hydrophobic system, the utility model discloses can realize the arbitrary switching and the combination of three kinds of oxygenation media and oxygenation system, can add the supplementary pH value that improves high hydrophobic system of alkalizer when the oxygenation. The automatic oxygen adding controller of the PLC is used for carrying out feedforward PID adjustment on the oxygen adding electric regulating valve and the oxygen adding metering pump, so that the automatic and accurate control of the oxygen adding amount can be realized. The utility model adopts air or oxygen-enriched water or dilute hydrogen peroxide as an oxygenation medium, and solves the safety problem of oxygenation of a high-pressure oxygenation drainage system under the conditions of high temperature and high pressure.
Description
Technical Field
The utility model relates to a power plant's trade water treatment technical field, in particular to high automatic oxygen system that adds of hydrophobic that adds.
Background
The operation temperature of the high pressure heater drainage system is in a sensitive range (150-250 ℃) where the flow accelerated corrosion is most likely to occur, meanwhile, the high pressure heater drainage system is a vapor-liquid two-phase flow system, the vapor-liquid distribution coefficient of ammonia is large, most of hydrophobic ammonia is distributed in a vapor space, the pH value of drainage is obviously reduced, and therefore the corrosion of the high pressure heater drainage system is often serious.
The oxygenation treatment is the preferred water chemical treatment process for ensuring safe and economic operation of the supercritical (super) critical unit. The traditional high-oxygen treatment generally controls the oxygen content at the inlet of the economizer to be 50-150 mug/L, so that high-concentration oxygen exists in steam, and the corrosion protection problem of a water supply system and a high-pressure drainage system is comprehensively solved by passivating the high-pressure drainage system by the steam with oxygen. However, related studies indicate that oxygen in steam can promote Fe2O3The oxide layer is generated, and the cracking and the peeling of the oxide layer in the austenitic steel steam pipeline are accelerated. The problems of pipe blockage and pipe explosion of the superheater and the reheater caused by oxide skin cause oxygen to be added in many power plants and color change. The low-oxygen treatment is gradually accepted by more and more power plants, the oxygen content at the inlet of the economizer is generally controlled to be less than 30 mu g/L, the requirement of corrosion prevention and passivation of a water supply system is met, meanwhile, the oxygen content of steam after oxygen addition is basically not increased compared with that before oxygen addition, and the potential risk of oxide skin during oxygen addition is effectively avoided. The deficiency of low oxygen treatment is that the steam entering the steam side of the high pressure heater is basically oxygen-free, and the corrosion problem of the high pressure heater and the high pressure heater cannot be solved.
In view of the problems of high-oxygen treatment and low-oxygen treatment of the feed water, the optimal oxygenation mode of the supercritical (super) unit is a full-protection oxygenation mode of' low-oxygen treatment of the feed water + single-oxygenation treatment of high-pressure plus water, the problem of flow accelerated corrosion of the high-pressure plus water drainage system under the condition of low-oxygen treatment of the feed water is thoroughly solved by independently oxygenating the high-pressure plus water drainage system, and the problems of pipe blockage and pipe explosion of a steam pipeline are solved at the same time.
The high-pressure water-adding and draining oxygenation point has high-temperature and high-pressure characteristics, for a supercritical (super) critical unit, the pressure of the high-pressure water-adding and draining oxygenation point is usually close to 10MPa, the pressure of oxygen adding and air supplying is usually more than 10MPa, the regulation of GB 169912-2016 technical Specification for oxygen and related gas safety regulations, the pure oxygen pressure is more than 3MPa, the pure oxygen is not allowed to be conveyed by using a carbon steel pipe, and when the oxygen pressure is more than 10MPa, a copper and copper alloy pipeline is adopted, so that the high-pressure water-adding and draining oxygenation cannot use pure oxygen as. Under the working condition, air or oxygen-enriched water or dilute hydrogen peroxide is used as a high-pressure hydrophobic oxygenation medium, air is used as the oxygenation medium, when the pressure of oxygenation air supply is greater than 10MPa, the partial pressure of oxygen is less than 3MPa, and related safety requirements can be met. After the high pressure water-adding and drainage oxygen adding medium is determined, an automatic high pressure water-adding and drainage oxygen adding system and an oxygen adding method are needed, and safe oxygen adding of the high pressure water-adding and drainage system is achieved.
Disclosure of Invention
In order to overcome the problem that above-mentioned prior art exists, the utility model aims to provide a high automatic oxygen system that adds of hydrophobic that adds to realize high safe oxygen that adds of hydrophobic system, this oxygen system that adds adopts air or rich oxygen water or rare hydrogen peroxide solution and/or alkalizer as the medium that adds oxygen, can realize three kinds of mediums that add oxygen and the arbitrary switching, the combination of system that adds oxygen simultaneously, satisfy the requirement of power plant and the on-the-spot condition of adding oxygen.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a high pressure heater drainage automatic oxygenation system comprises a gaseous high pressure heater drainage oxygenation system, an oxygen-enriched water high pressure heater drainage oxygenation system, a hydrogen peroxide high pressure heater drainage oxygenation system and a PLC (programmable logic controller) automatic oxygenation controller 11;
the gaseous high-pressure hydrophobic oxygenation system comprises a compressed air preparation system 19 connected with a high-pressure hydrophobic oxygenation point 8, and a pipeline connecting an outlet of the compressed air preparation system 19 and the high-pressure hydrophobic oxygenation point 8 is sequentially provided with a compressed air preparation system outlet valve 17, a gas pressure reducing valve 15, an oxygenation electric regulating valve front isolation valve 13, an oxygenation electric regulating valve 12, an oxygenation pressure stabilizing valve 10 and a gaseous oxygenation stop valve 9;
the oxygen-enriched water high-pressure-drainage oxygenation system comprises a demineralized water taking valve 1 and a compressed air preparation system 19 or an oxygen cylinder 18 which are connected with a high-pressure-drainage oxygenation point 8, wherein a liquid pressure reducing valve 2, a solubilizing device 3, an oxygenation metering pump 4, a pulse damper 5, a back pressure valve 6 and a liquid oxygenation stop valve 7 are sequentially arranged on a pipeline connecting the demineralized water taking valve 1 and the high-pressure-drainage oxygenation point 8; a pipeline connecting an outlet of the compressed air preparation system 19 and an inlet of the solubilizing device 3 is sequentially provided with an outlet valve 17 of the compressed air preparation system, a gas pressure reducing valve 15 and a front isolating valve 14 of the solubilizing device, and a pipeline connecting an outlet of the oxygen cylinder 18 and an inlet of the solubilizing device 3 is sequentially provided with an outlet valve 16 of the oxygen cylinder, the gas pressure reducing valve 15 and the front isolating valve 14 of the solubilizing device;
the hydrogen peroxide high-pressure-plus-drainage oxygenation system comprises a demineralized water intake valve 1 and a liquid medicine tank 22 which are connected with a high-pressure-plus-drainage oxygenation point 8, wherein a liquid pressure reducing valve 2, a solubilizing device 3, an oxygenation metering pump 4, a pulse damper 5, a back pressure valve 6 and a liquid oxygenation stop valve 7 are sequentially arranged on a pipeline connecting an outlet of the demineralized water intake valve 1 and the high-pressure-plus-drainage oxygenation point 8; a pipeline connecting the outlet of the liquid medicine box 22 and the inlet of the solubilizing device 3 is sequentially provided with a liquid medicine box metering pump 21 and a liquid medicine box metering pump outlet valve 20;
the oxygenation electric regulating valve 12 and the oxygenation metering pump 4 are connected with a PLC (programmable logic controller) automatic oxygenation controller 11.
In the gaseous high-pressure hydrophobic oxygenation system, the oxygenation medium must be air, the air is decompressed to a preset value from a compressed air preparation system 19 through an outlet valve 17 of the compressed air preparation system to a gas pressure reducing valve 15, then the air passes through a front isolation valve 13 of an oxygenation electric regulating valve to an oxygenation electric regulating valve 12, the pressure of the compressed air at the outlet of the oxygenation electric regulating valve 12 is stabilized to the preset value by an oxygenation pressure stabilizing valve 10, the pressure difference between the inlet and the outlet of the oxygenation electric regulating valve 12 is constant, and the opening of the oxygenation electric regulating valve 12 is automatically adjusted by a PLC (programmable logic controller) automatic oxygenation controller 11 to control the oxygenation flow so as to realize the automatic and accurate control of the oxygenation.
In the oxygen-enriched water high-pressure hydrophobic oxygenation system, an oxygenation medium is oxygen-enriched water, and desalted water required by preparing the oxygen-enriched water is delivered to a solubilization device 3 from a desalted water taking valve 1 through a liquid pressure reducing valve 2; oxygen required for preparing the oxygen-enriched water is delivered to the solubilizing device 3 from the compressed air preparation system 19 through the outlet valve 17 of the compressed air preparation system, the gas pressure reducing valve 15 and the pre-solubilizing device isolation valve 14, or is delivered to the solubilizing device 3 from the oxygen cylinder 18 through the outlet valve 16 of the oxygen cylinder, the gas pressure reducing valve 15 and the pre-solubilizing device isolation valve 14; oxygen and demineralized water are fully mixed in the solubilizing device 3 to prepare oxygen saturated oxygen-enriched water under certain oxygen partial pressure, and the flow of the oxygen-enriched water is controlled by automatically adjusting the frequency of the oxygen metering pump 4 through the PLC (programmable logic controller) automatic oxygen adding controller 11 to realize automatic and accurate control of oxygen adding amount.
In the hydrogen peroxide high-pressure hydrophobic oxygenation system, a medium is dilute hydrogen peroxide and/or an alkalizer, wherein the dilute hydrogen peroxide is used as a high-pressure hydrophobic oxygenation medium, the alkalizer is used as a high-pressure hydrophobic dosing medium, and desalted water required for preparing the dilute hydrogen peroxide and/or strong alkaline water is delivered to a solubilization device 3 from a desalted water taking valve 1 through a liquid pressure reducing valve 2; hydrogen peroxide and/or alkalizer required for preparing dilute hydrogen peroxide and/or strong alkaline water are delivered to the solubilization device 3 from a liquid medicine box 22 through a liquid medicine box metering pump 21 and a liquid medicine box metering pump outlet valve 20; a certain amount of desalted water and a certain amount of hydrogen peroxide and/or alkalizer are fully mixed in the capacity increasing device 3 to prepare a mixture of dilute hydrogen peroxide or strong alkaline water or hydrogen peroxide and strong alkaline water with a certain concentration, and the flow of the dilute hydrogen peroxide or the strong alkaline water or the mixture of the hydrogen peroxide and the strong alkaline water is controlled by automatically adjusting the frequency of the oxygen adding metering pump 4 through the PLC (programmable logic controller) automatic oxygen adding controller 11 so as to realize the automatic and accurate control of the oxygen adding amount and the medicine adding amount.
When the gaseous high-pressure water and high-pressure water drainage oxygenation system or the oxygen-enriched water high-pressure water and high-pressure water drainage oxygenation system is started, the hydrogen peroxide high-pressure water and high-pressure water drainage oxygenation system can be started simultaneously, at the moment, the hydrogen peroxide high-pressure water and high-pressure water drainage oxygenation system only adds an alkalizer, and the alkalizer can assist in improving the pH value of the high-pressure water and high-pressure water drainage automatic oxygenation system, so that the corrosion of the high-pressure water drainage system can be inhibited more favorably.
According to the oxygenation method of the high-pressure-plus-hydrophobicity automatic oxygenation system, the oxygenation medium with high-pressure-plus-hydrophobicity is air or oxygen-enriched water or dilute hydrogen peroxide, and the pH value of the high-pressure-plus-hydrophobicity can be increased by adding an alkalizer in an auxiliary manner during oxygenation;
when air is selected as a high-pressure-increased hydrophobic oxygenation medium, the demineralized water intake valve 1, the oxygen cylinder outlet valve 16, the solubilizing device front isolation valve 14 and the liquid oxygenation stop valve 7 are closed, the compressed air preparation system outlet valve 17, the oxygenation electric regulating valve front isolation valve 13, the oxygenation electric regulating valve 12 and the gaseous oxygenation stop valve 9 are opened, and the air sequentially passes through the compressed air preparation system outlet valve 17, the gas pressure reducing valve 15, the oxygenation electric regulating valve front isolation valve 13, the oxygenation electric regulating valve 12, the oxygenation pressure stabilizing valve 10 and the gaseous oxygenation stop valve 9 and is added into a high-pressure-increased hydrophobic oxygenation point 8; the opening of the oxygen adding electric regulating valve 12 is automatically regulated by the PLC automatic oxygen adding controller 11 to control the oxygen adding flow so as to realize the automatic and accurate control of the oxygen adding amount;
when oxygen-enriched water is selected as a high-pressure-increasing hydrophobic oxygenation medium, a front isolation valve 13 and a gaseous oxygenation stop valve 9 of an oxygenation electric regulating valve are closed, a demineralized water intake valve 1, an oxygen cylinder outlet valve 16 or a compressed air preparation system outlet valve 17, a solubilization device front isolation valve 14 and a liquid oxygenation stop valve 7 are opened, demineralized water and oxygen or air are fully mixed in a solubilization device 3 to prepare oxygen-enriched water, and the oxygen-enriched water sequentially passes through an oxygenation metering pump 4, a pulse damper 5, a back pressure valve 6 and the liquid oxygenation stop valve 7 and is added into a high-pressure-increasing hydrophobic oxygenation point 8; the flow of the oxygen-enriched water is controlled by automatically adjusting the frequency of the oxygen adding metering pump 4 through the PLC automatic oxygen adding controller 11 so as to realize the automatic and accurate control of the oxygen adding amount;
when dilute hydrogen peroxide is selected as a high-pressure hydrophobic oxygenation medium and/or an alkalizer is selected as a high-pressure hydrophobic dosing medium, closing a front isolation valve 14 and a gaseous oxygenation stop valve 9 of the solubilization device, opening a demineralized water intake valve 1, a liquid pressure reducing valve 2, a liquid medicine tank metering pump 21, a liquid medicine tank metering pump outlet valve 20 and a liquid oxygenation stop valve 7, fully mixing demineralized water and hydrogen peroxide and/or the alkalizer in a fixed ratio in a solubilization device 3 to prepare a mixture of dilute hydrogen peroxide or strong-alkaline water or hydrogen peroxide and strong-alkaline water, and sequentially passing the mixture of dilute hydrogen peroxide or strong-alkaline water or hydrogen peroxide and strong-alkaline water through an oxygenation metering pump 4, a pulse damper 5, a back pressure valve 6 and the liquid oxygenation stop valve 7 to be added into a high-pressure hydrophobic oxygenation point 8; the flow of dilute hydrogen peroxide or strong alkaline water or the mixture of the hydrogen peroxide and the strong alkaline water is controlled by automatically adjusting the frequency of the oxygen adding metering pump 4 through the PLC (programmable logic controller) automatic oxygen adding controller 11, so that the automatic accurate control of the oxygen adding amount and the chemical adding amount is realized.
The method for realizing the automatic accurate control of the oxygen addition amount is feedforward PID control;
when the highly water-adding and draining oxygenation medium is air, the adding amount of the air is in direct proportion to the valve opening of the oxygenation electric regulating valve 12, so that the adding amount of the air is represented by the opening of the oxygenation electric regulating valve 12, the unit load P is used as a feedforward signal, and the opening O of the oxygenation electric regulating valve 12 at the momentA1The set value D of the dissolved oxygen amount is equal to the unit load PO1In a certain condition, the ratio coefficient is set as KA，OA1＝KA×DO1X P, and simultaneously, collecting the real-time dissolved oxygen D of the feed waterO2And is combined with the dissolved oxygen set value DO1Comparing the measured values, performing PID (proportion integration differentiation) adjustment on the opening of the oxygen adding electric regulating valve 12 according to the deviation value of the dissolved oxygen amount to obtain a corrected valve opening OA2Thereby realizing the automatic and accurate control of the air adding amount;
when the high-pressure hydrophobic oxygenation medium is oxygen-enriched water or dilute hydrogen peroxide and/or an alkalizer, the adding amount of the oxygen-enriched water or dilute hydrogen peroxide and/or the alkalizer is in direct proportion to the frequency of the oxygenation metering pump 4, so that the adding amount of the oxygen-enriched water or dilute hydrogen peroxide and/or the alkalizer is represented by the frequency of the oxygenation metering pump 4, the unit load P is used as a feedforward signal, and the frequency F of the oxygenation metering pump 4 is used as a feedforward signalW1The set value D of the dissolved oxygen amount is equal to the unit load PO1In a certain condition, the ratio coefficient is set as KW，FW1＝KW×DO1X P, and simultaneously, collecting the real-time dissolved oxygen D of the feed waterO2And is combined with the dissolved oxygen set value DO1Comparing, PID adjusting the frequency of the oxygenation metering pump 4 according to the deviation value of the dissolved oxygen amount to obtain the corrected pump frequency FA2Thereby realizing the automatic and accurate control of the adding amount of the oxygen-enriched water or the dilute hydrogen peroxide and/or the alkalizer.
Compared with the prior art, the utility model has the advantages of as follows:
1. carry out the oxygen processing alone to high drainage that adds, thoroughly solve under the feedwater low oxygen processing condition high drainage system's that adds flow accelerated corrosion problem, give consideration to simultaneously feedwater low oxygen processing and taken into account the problem of stifled pipe, the pipe explosion that has solved the steam conduit cinder and drop and cause, realize the comprehensive protection of thermal power plant steam system.
2. Air or oxygen-enriched water is used as an oxygenation medium, so that the safety problem of oxygenation of a high-pressure oxygenation drainage system under the conditions of high temperature and high pressure is solved.
3. The three high-pressure drainage oxygenation systems of air, oxygen-enriched water or dilute hydrogen peroxide can be selected, switched and combined at will, can adapt to different field conditions, and meet different requirements of power plants.
4. And an alkalizer can be added to assist in improving the pH value of the high pressure water drainage system while adding oxygen, so that the corrosion of the high pressure water drainage system is inhibited more favorably.
5. The PLC is used for carrying out feedforward PID adjustment on the oxygen adding electric regulating valve and the oxygen adding metering pump to realize accurate and automatic control of oxygen addition, and the oxygen adding amount does not need to be adjusted manually according to load change frequently.
Drawings
Fig. 1 is a schematic structural diagram of the high pressure water drainage automatic oxygenation system of the utility model.
FIG. 2 is a schematic view of the automatic and precise control of oxygen addition amount by the automatic high-pressure-water-adding and oxygen-adding system of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and embodiments.
As shown in the figure 1 and figure 2, when air is selected as a high-pressure-increasing hydrophobic oxygenation medium, a demineralized water intake valve 1, an oxygen cylinder outlet valve 16, a solubilizing device front isolation valve 14 and a liquid oxygenation stop valve 7 are closed, a compressed air preparation system outlet valve 17, an oxygenation electric regulating valve front isolation valve 13, an oxygenation electric regulating valve 12 and a gaseous oxygenation stop valve 9 are opened, the pressure of the air is reduced to 11.0MPa through a compressed air preparation system 19, the compressed air passes through a compressed air preparation system outlet valve 17 and a gas pressure reducing valve 15, and then the air passes through an oxygenation electric regulating valve 15The front isolation valve 13 of the regulating valve is connected with the oxygen adding electric regulating valve 12, the pressure of the outlet of the oxygen adding electric regulating valve 12 is stabilized to 10.5MPa by the oxygen adding pressure stabilizing valve 10, and the pressure difference between the inlet and the outlet of the oxygen adding electric regulating valve 12 is 0.5MPa at the moment. Under the condition that the pressure difference between the inlet and the outlet of the oxygen adding electric regulating valve 12 is stable, the adding amount of air and the opening of the oxygen adding electric regulating valve 12 are in direct proportion, so that the oxygen adding amount can be controlled by automatically regulating the opening of the oxygen adding electric regulating valve 12 through the PLC 11, the automatic and accurate control of the oxygen adding amount is realized, the unit load P is used as a feedforward signal, and at the moment, the opening O of the oxygen adding electric regulating valve 12 is used as a feedforward signalA1The set value D of the dissolved oxygen amount is equal to the unit load PO1In a certain condition, the ratio coefficient is set as KA，OA1＝KA×DO1X P, and simultaneously, collecting the real-time dissolved oxygen D of the feed waterO2And is combined with the dissolved oxygen set value DO1Comparing the measured values, performing PID (proportion integration differentiation) adjustment on the opening of the oxygen adding electric regulating valve 12 according to the deviation value of the dissolved oxygen amount to obtain a corrected valve opening OA2。
When the oxygen-enriched water is selected as a high-pressure-increasing hydrophobic oxygenation medium, the front isolation valve 13 and the gaseous oxygenation stop valve 9 of the oxygenation electric regulating valve are closed, the demineralized water intake valve 1, the oxygen cylinder outlet valve 16 or the compressed air preparation system outlet valve 17, the solubilization device front isolation valve 14 and the liquid oxygenation stop valve 7 are opened, and the demineralized water required for preparing the oxygen-enriched water is decompressed to 1.0MPa by the demineralized water intake valve 1 through the liquid pressure reducing valve 2 and then is conveyed to the solubilization device 3. The oxygen required by the preparation of the oxygen-enriched water is decompressed to 1.0MPa from a compressed air preparation system 19 through an outlet valve 17 of the compressed air preparation system to a gas pressure reducing valve 15, the decompressed compressed air is decompressed to 1.0MPa through a front isolation valve 14 of the solubilizing device, or the decompressed oxygen is decompressed to 1.0MPa from an oxygen cylinder 18 through an outlet valve 16 of the oxygen cylinder to the gas pressure reducing valve 15, and the decompressed oxygen is decompressed to the solubilizing device 3 through the front isolation valve 14 of the solubilizing device. Oxygen and the desalted water are fully mixed in the solubilizing device 3 to prepare oxygen-saturated oxygen-enriched water under a certain oxygen partial pressure. The solubilization device 3 is provided with a liquid level upper limit and a liquid level lower limit, water replenishing is started when the liquid level lower limit is lower than the liquid level lower limit, water replenishing is stopped when the liquid level upper limit is higher than the liquid level upper limit, and the gas partial pressure in the solubilization device 3 is kept to be 1.0MPa all the time. Selecting the maximum outlet pressure to be largeAdding oxygen into a metering pump with the pressure of 10MPa, wherein the adding amount of the oxygen-enriched water is in direct proportional relation with the frequency of the oxygen-adding metering pump 4, the flow of the oxygen-enriched water can be controlled by automatically adjusting the frequency of the oxygen-adding metering pump 4 through a PLC (programmable logic controller) automatic oxygen adding controller 11, the automatic accurate control of the oxygen adding amount is realized, the unit load P is taken as a feedforward signal, and at the moment, the frequency F of the oxygen-adding metering pump 4 isW1The set value D of the dissolved oxygen amount is equal to the unit load PO1In a certain condition, the ratio coefficient is set as KW，FW1＝KW×DO1X P, and simultaneously, collecting the real-time dissolved oxygen D of the feed waterO2And is combined with the dissolved oxygen set value DO1Comparing, PID adjusting the frequency of the oxygenation metering pump 4 according to the deviation value of the dissolved oxygen amount to obtain the corrected pump frequency FA2。
When dilute hydrogen peroxide is selected as a high-pressure hydrophobic oxygenation medium and/or an alkalizer is selected as a high-pressure hydrophobic dosing medium, the front isolation valve 14 and the gaseous oxygenation stop valve 9 of the solubilization device are closed, the demineralized water intake valve 1, the liquid pressure reducing valve 2, the liquid medicine tank metering pump 21, the liquid medicine tank metering pump outlet valve 20 and the liquid oxygenation stop valve 7 are opened, and demineralized water required for preparing the mixture of dilute hydrogen peroxide or strong alkaline water or hydrogen peroxide and strong alkaline water is conveyed to the solubilization device 3 after being reduced in pressure to 1.0MPa by the demineralized water intake valve 1 through the liquid pressure reducing valve 2. Hydrogen peroxide and/or an alkalizer required for preparing diluted hydrogen peroxide or strong alkaline water or a mixture of the hydrogen peroxide and the strong alkaline water are conveyed to the solubilization device 3 from a liquid medicine box 22 through a liquid medicine box metering pump 21 and a liquid medicine box metering pump outlet valve 20. The desalted water and hydrogen peroxide and/or alkalizer are respectively conveyed to the solubilization device 3 according to a fixed proportion and are fully mixed in the solubilization device 3, and diluted hydrogen peroxide or strong alkaline water or a mixture of the hydrogen peroxide and the strong alkaline water with a certain concentration is prepared. The solubilization device 3 is provided with an upper limit and a lower limit of the liquid level, starts dispensing when the upper limit of the liquid level is lower than the lower limit of the liquid level, and stops dispensing when the upper limit of the liquid level is higher than the upper limit of the liquid level. The metering pump with the maximum outlet pressure of more than 10MPa is selected for dosing, the adding amount of the dilute hydrogen peroxide and/or the alkalizer is in direct proportion to the frequency of the oxygenation metering pump 4, the flow of the oxygen-enriched water can be controlled by automatically adjusting the frequency of the oxygenation metering pump 4 through the PLC (programmable logic controller) automatic oxygenation controller 11, so that the automatic accurate control of the oxygen adding amount is realized, and the dosing machine is used for dosingThe group load P is used as a feed-forward signal, at which the frequency F of the oxygenation metering pump 4H1The set value D of the dissolved oxygen amount is equal to the unit load PO1In a certain condition, the ratio coefficient is set as KH，FH1＝KH×DO1X P, and simultaneously, collecting the real-time dissolved oxygen D of the feed waterO2And is combined with the dissolved oxygen set value DO1Comparing, PID adjusting the frequency of the oxygenation metering pump 4 according to the deviation value of the dissolved oxygen amount to obtain the corrected pump frequency FH2。
Claims (1)
1. The utility model provides a high hydrophobic automatic oxygenation system that adds which characterized in that: comprises a gaseous high-pressure water and high-pressure water drainage oxygenation system, an oxygen-enriched water high-pressure water and high-pressure water drainage oxygenation system, a hydrogen peroxide high-pressure water and high-pressure water drainage oxygenation system and a PLC automatic oxygenation controller (11);
the gaseous high-pressure hydrophobic oxygenation system comprises a compressed air preparation system (19) connected with a high-pressure hydrophobic oxygenation point (8), and a pipeline connecting an outlet of the compressed air preparation system (19) and the high-pressure hydrophobic oxygenation point (8) is sequentially provided with a compressed air preparation system outlet valve (17), a gas pressure reducing valve (15), an oxygenation electric regulating valve front isolation valve (13), an oxygenation electric regulating valve (12), an oxygenation pressure stabilizing valve (10) and a gaseous oxygenation stop valve (9);
the oxygen-enriched water high-pressure drainage oxygenation system comprises a demineralized water taking valve (1) connected with a high-pressure drainage oxygenation point (8) and a compressed air preparation system (19) or an oxygen cylinder (18), wherein a liquid pressure reducing valve (2), a solubilizing device (3), an oxygenation metering pump (4), a pulse damper (5), a back pressure valve (6) and a liquid oxygenation stop valve (7) are sequentially arranged on a pipeline connected with the demineralized water taking valve (1) and the high-pressure drainage oxygenation point (8); a pipeline connecting an outlet of the compressed air preparation system (19) and an inlet of the solubilizing device (3) is sequentially provided with an outlet valve (17) of the compressed air preparation system, a gas pressure reducing valve (15) and a front isolating valve (14) of the solubilizing device, and a pipeline connecting an outlet of the oxygen cylinder (18) and an inlet of the solubilizing device (3) is sequentially provided with an outlet valve (16) of the oxygen cylinder, the gas pressure reducing valve (15) and the front isolating valve (14) of the solubilizing device;
the hydrogen peroxide high-pressure-plus-drainage oxygenation system comprises a desalted water taking valve (1) and a liquid medicine tank (22), wherein the desalted water taking valve (1) is connected with a high-pressure-plus-drainage oxygenation point (8), and a liquid pressure reducing valve (2), a solubilizing device (3), an oxygenation metering pump (4), a pulse damper (5), a back pressure valve (6) and a liquid oxygenation stop valve (7) are sequentially arranged on a pipeline connecting the outlet of the desalted water taking valve (1) and the high-pressure-plus-drainage oxygenation point (8); a liquid medicine tank metering pump (21) and a liquid medicine tank metering pump outlet valve (20) are sequentially arranged on a pipeline connecting an outlet of the liquid medicine tank (22) and an inlet of the solubilizing device (3);
the oxygenation electric regulating valve (12) and the oxygenation metering pump (4) are connected with a PLC automatic oxygenation controller (11).
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| CN111348759A (en) * | 2020-04-07 | 2020-06-30 | 西安热工研究院有限公司 | High-pressure-rise hydrophobic automatic oxygenation system and oxygenation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111348759A (en) * | 2020-04-07 | 2020-06-30 | 西安热工研究院有限公司 | High-pressure-rise hydrophobic automatic oxygenation system and oxygenation method |
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