JP3242972U - sulfite air oxidation system - Google Patents

Abstract

Kind Code: A1 An oxidation reaction can be achieved at a constant temperature, a constant rotation speed, and a constant pH, and the acid-base consumption during the process of constantly adjusting the pH of a sulfite reaction solution can be recorded in real time. To provide a sulfite air oxidation system capable of A sulfite air oxidation system comprising a constant temperature stirrer (1), a reactor (14), a first automatic titrator (4), a first metering device (6) and an air pump (11), wherein the constant temperature stirrer moves a temperature probe (2). A reactor is provided with a constant temperature stirring device, a temperature probe is provided in the reactor, a first automatic titrator is connected to the pH composite electrode 8, the pH composite electrode enters the reactor, and the first The metering device is provided with a first acid/alkali storage vessel 5, the first acid/alkali storage vessel communicating with the reactor via a first line and a first solenoid valve in the first line. 7 is installed and the first solenoid valve is connected to the first autotitrator. [Selection drawing] Fig. 1

Description

This application relates to the field of flue gas treatment technology, and more particularly to sulfite air oxidation systems.

In the limestone-gypsum wet desulfurization process, the _SO2 in the flue gas is captured by the limestone ( _CaCO3 ) slurry injected from the upper nozzle of the absorber tower, falls to the bottom slurry, and is Oxidation occurs and a gypsum by-product (CaSO ₄ .2H ₂ O) is obtained. Slurry oxidation is mainly a liquid phase reaction process, the reaction rate between sulfite and oxygen is fast, and _O2 needs to dissolve from air into the liquid phase before participating in the reaction. Coal and limestone usually contain trace amounts of Mn, Fe ^, Co, ^etc. , which after dissolution are produced and enriched in the absorber tower to effectively catalyze ^the oxidation process. and the oxidation rate is generally limited by the diffusion capacity of _O2 in the liquid film. Normally, the oxidation process in the limestone-gypsum wet desulfurization process is carried out under the conditions of constant pH, constant temperature and constant agitation degree, and the conventional sulfite acid oxidation equipment does not allow accurate measurement under constant conditions. cannot be realized.

In view of this, the present application aims to provide a sulfite air oxidation system, which is equipped with a constant temperature stirrer, an automatic titrator and a metering device, so that a constant temperature, constant rotation speed and constant pH , and the acid-base consumption can be recorded in real time during the constant adjustment of the pH of the sulfite reaction solution.

In order to achieve the above objects, the embodiments of the present application are:
a constant temperature stirrer having a temperature probe;
a reactor provided in the constant temperature stirrer and having the temperature probe therein;
a first automatic titrator connected to a pH composite electrode entering said reactor;
A first metering device provided with a first acid/alkali storage vessel, said first acid/alkali storage vessel communicating with said reactor via a first conduit, said first conduit a first metering device having a first solenoid valve attached to the passage, said first solenoid valve being connected to said first automatic titrator;
and an air pump communicating with said aerator provided within said reactor via a second line fitted with a flow meter.

In addition, the sulfite air oxidation system provided by the above embodiments of the present application can have additional technical features as follows.

In some embodiments, the sulfite air oxidation system further comprises a second metering unit and a second autotitrator, wherein the second metering unit is provided with a second acid/alkali reservoir; The second acid/alkali storage vessel communicates with the reactor via a third line, a second solenoid valve attached to the third line, and a second solenoid valve attached to the second solenoid valve. are connected, and the second automatic titrator is connected to the pH composite electrode.

In some embodiments, the pH composite electrode is connected to the first autotitrator and the second autotitrator via a controller.

In some embodiments, the first acid/alkali reservoir is an acid/alkali bottle and the second acid/alkali reservoir is a lye bottle.

In some embodiments, the sulfite air oxidation system further includes a dissolved oxygen meter, the dissolved oxygen meter has a dissolved oxygen meter probe, and the dissolved oxygen meter probe penetrates the reactor.

In some embodiments, the dissolved oxygen meter, the temperature probe, the aerator and the ends of the pH composite electrode are all inserted below liquid level in the reactor.

In some embodiments, the pH composite electrode is connected to the first autotitrator via a controller.

In some embodiments the controller is a PLC controller.

In some embodiments, the constant temperature stirring device is a constant temperature magnetic stirrer and a magnet is provided within the reactor.

In some embodiments, both the first weighing device and the second weighing device are analytical balances.

In some embodiments, the aerator is one of a nozzle, a micropore aerator and a jet aerator.

In some examples, the reactor is one of a beaker, a flask, an Erlenmeyer flask.

The beneficial effects of the example sulfite air oxidation system of the present application are as follows. Equipped with constant temperature stirring device, automatic titration device and metering device, it can realize the oxidation reaction at constant temperature, constant rotation speed and constant pH, and adjust the pH of the sulfite reaction solution to be constant. The acid-base consumption during the process can be recorded in real time.

Additional aspects and advantages of the present application will be set forth in part from the description that follows, and in part will be apparent from the description, or may be learned by practice of the application.

The above and/or additional aspects and advantages of the present application will become apparent and understandable from the description of the embodiments in conjunction with the following drawings.
1 is a simple structural schematic diagram of a sulfite air oxidation system according to one embodiment of the present application; FIG. 1 is a simple structural schematic diagram of a sulfite air oxidation system according to another embodiment of the present application; FIG.

Embodiments of the present application will be described in detail below, examples of said embodiments being illustrated in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to illustrate the present application and should not be understood as limiting the present application.

In the application, unless otherwise specified, the raw materials, equipment, etc. involved are those that can be self-produced by commercial routes or known methods, and the methods involved are conventional methods.

A sulfite air oxidation system according to an embodiment of the present application will now be described with reference to the drawings.

FIG. 1 is a simple structural schematic diagram of a sulfite air oxidation system according to one embodiment of the present application.

As shown in FIG. 1 , the sulfite air oxidation system of the examples of the present application includes a constant temperature stirrer 1 , a reactor 14 , a first automatic titrator 4 , a first metering device 6 and an air pump 11 . The constant temperature stirring device 1 includes a temperature probe 2, the reactor 14 is provided in the constant temperature stirring device 1, the temperature probe 2 is provided in the reactor 14, and the first automatic titration device 4 is connected to the pH composite electrode 8. , the pH composite electrode 8 enters the reactor 14, the first metering device 6 is provided with a first acid/alkali storage vessel 5, the first acid/alkali storage vessel 5 via a first line Communicating with the reactor 14, a first solenoid valve 7 is attached to the first line, the first solenoid valve 7 is connected to the first automatic titrator 4, and the air pump 11 is connected to the second line. A flow meter 12 is attached to the second conduit, and the aerator 13 is provided within the reactor 14 .

Although the pH changes during the sulfite oxidation process, the sulfite air oxidation system of the examples of the present application is equipped with a constant temperature stirrer, an automatic titrator and a metering device, so that the temperature is constant and the rotation speed is constant. And the oxidation reaction at a constant pH can be realized, and the acid-base consumption can be recorded in real time during the constant adjustment of the pH of the sulfite reaction solution.

In some embodiments, the sulfite air oxidation system further comprises a dissolved oxygen meter 10, wherein the dissolved oxygen meter 10 is a Having a probe 9 , the dissolved oxygen meter probe 9 enters the reactor 14 . Specifically, the ends of the dissolved oxygen meter 10, the temperature probe 2, the aerator and the pH composite electrode 8 are all inserted below the liquid level in the reactor 14. Thus, the dissolved oxygen meter can monitor the concentration of dissolved oxygen in the reaction liquid in real time during the reaction, the temperature probe can test the temperature of the reaction liquid, and the aerator can provide oxygen for the reaction. and the pH composite electrode can monitor the pH of the reaction solution in real time.

In some embodiments, pH composite electrode 8 is connected to first autotitrator 4 via controller 19, as shown in FIG. Specifically, the input side of the controller 19 is electrically connected to the pH composite electrode 8, the pH composite electrode 8 enters the reactor 14, and the output side of the controller 19 is electrically connected to the first automatic titrator 4. be. As a possible example, the controller includes, but is not limited to, a PLC controller to facilitate automated titration and control.

In addition, when the sulfite air oxidation system of the present embodiment includes only the first acid/alkali storage container 5, the first acid/alkali storage container 5 stores acid or alkali liquid according to the needs of the reaction. can do. Preferably, the first acid/alkali storage container 5 is an acid or alkali liquid bottle, and the acid and alkali liquid bottles may be Erlenmeyer flasks or the like.

In some embodiments, the sulfite air oxidation system includes a second metering unit and a second automatic titration unit, as shown in FIG. further comprising a device 15, wherein the second metering unit is provided with a second acid/alkali storage vessel 16, the second acid/alkali storage vessel 16 communicating with the reactor 14 via a third conduit; A second solenoid valve 18 is attached to the third conduit, a second automatic titrator 15 is connected to the second solenoid valve 18, and the second automatic titrator 15 is connected to the pH composite electrode 8. . Preferably, the first acid/alkali storage vessel 5 is an acid/alkali bottle, the second acid/alkali storage vessel 16 is an alkalescent bottle, and the acid/alkali bottles may be Erlenmeyer flasks or the like. good. In some embodiments, the pH composite electrode 8 is connected to the first autotitrator 4 and the second autotitrator 15 via a controller 19 to facilitate control and achieve automatic titration. . Specifically, the input side of the controller 19 is electrically connected to the pH composite electrode 8, the pH composite electrode 8 enters the reactor 14, and the output side of the controller 19 is the first automatic titrator 4 and the second automatic titrator. It is electrically connected to the titration device 15 . As a possible example, controller 19 can be a PLC controller or the like, as in the case of only one autotitrator. The pH composite electrode 8 detects the pH of the reaction solution and transmits the detected pH signal of the reaction solution to the controller. The device 15 is controlled to operate, and thus the operation of the first solenoid valve and/or the second solenoid valve to determine whether or not to titrate the reaction liquid. The detailed description is omitted here.

In some embodiments, the constant temperature stirrer 1 is a constant temperature magnetic stirrer and a magnet 3 is provided within the reactor 14 . Both the first weighing device 6 and the second weighing device 17 are analytical balances. Aerator 13 is one of a nozzle, a micropore aerator and a jet aerator. Reactor 14 is one of a beaker, flask, or Erlenmeyer flask.

It should be noted that the sulfite air oxidation system in the embodiments of the present application is mainly biased to laboratory test equipment, specifically, in industrialization, each functional component can be replaced or improved according to actual needs. .

Taking the sulfite air oxidation system of the embodiment of the present application shown in FIG. 2 as an example, the operation process of the sulfite air oxidation system of the embodiment of the present application is as follows.

1, acid solution with a certain concentration (such as 0.01 mol/L, 0.05 mol/L, 0.1 mol/L, 0.2 mol/L, 0.5 mol/L or 1 mol/L); (e.g., hydrochloric acid or sulfuric acid) and alkaline solutions (such as sodium hydroxide solution or potassium hydroxide solution) are placed in the first acid/alkali storage container 5 and the second acid/alkali storage container 16, respectively, and the first automatic The titration end point pH of the titrator 4 and the second automatic titrator 15 (for example, pH = 1, 2, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 8 , 10, 12 or 13, etc.), and set the first automatic titrator 4 and the second automatic titrator 15 to have the same titration end point pH, and the titration end point pH is the target pH of the reaction liquid .
2. Put a certain amount of sulfite reaction solution (such as sodium sulfite solution, calcium sulfate slurry) into the reactor 14, turn on the constant temperature stirrer, set the constant rotation speed (such as 400 r/min, 500 r/min, 600 r/min, 700 r/min or 800 r/min, etc.).
3. Raise the temperature to a target temperature (eg 30°C, 40°C, 45°C, 50°C, 60°C, 70°C, 80°C, 90°C, etc.).
4. The pH of the reaction liquid is measured by the pH composite electrode 8, and a signal is sent to the controller 19, which, based on the difference between the actual pH of the reaction liquid and the target titration end point, performs acid titration or alkaline liquid Decide whether to start the titration. When the actual pH of the reaction solution is greater than the target titration end point, the first automatic titrator 4 is activated and the first solenoid valve 7 is controlled to perform acid titration, thereby increasing the actual pH of the reaction solution. If it is less than the target titration end point, start the second automatic titrator 15 and control the second solenoid valve 18 to perform alkali titration, so that when the actual pH of the reaction liquid is equal to the target titration end point, Does not work and does not perform titration operations.
5. After the pH of the reaction solution is adjusted to the target pH and stabilized, the numerical values of the first metering device 6 and the second metering device 17 are adjusted to zero.
6. Turn on the air pump 11, adjust the flow meter 12 to a constant air flow rate, aerate the reaction liquid through the aerator, and start the air oxidation reaction of sulfite.
7. In the course of the experiment, via the first metering device 6, the second metering device 17, titration of acid, alkali indicated by the first acid/alkali reservoir 5, the second acid/alkali reservoir 16 Amounts can be recorded at regular intervals.

In addition, when the system further includes a dissolved oxygen meter, the concentration of dissolved oxygen in the reaction solution can be measured in real time. If the system only includes a first autotitrator, a first metering device, a first acid/alkali reservoir, etc., the operating process is the same as above except that the first acid/alkaline The alkali reservoir is adjusted to either the alkali or acid bottle, or both placed together in the first metering device to titrate the reaction liquid with acid or alkali.

In the description of this application, "center", "longitudinal", "lateral", "length", "width", "thickness", "top", "bottom", "front", "back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", "Radial" , "circumferential", etc., are orientations or positional relationships based on the drawings, and are merely for the purpose of describing and simplifying the present application, and the devices indicated or should not be construed as limiting this application, as it does not indicate or imply that the elements necessarily have a particular orientation and are constructed or operated in a particular orientation.

Also, the terms "first" and "second" are for descriptive purposes only and do not indicate or imply relative importance or implicitly indicate the number of technical features indicated. should not be understood as Thereby, features defined by "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, "plurality" means at least two, such as two, three, etc., unless expressly specified otherwise.

In this application, unless there are other explicit rules and limitations, terms such as "attachment", "connection", "connection", "fixation" should be understood broadly, e.g. There may be, it may be a removable connection, or it may be an integral connection. It may be a mechanical connection, it may be an electrical connection, or it may be able to communicate with each other. It may be a direct connection, an indirect connection through an intermediate medium, an internal communication between two parts, or an interaction relationship between two parts. A person skilled in the art can understand the specific meaning of the above terms in this application according to the specific situation.

In this application, unless there are other explicit rules and limitations, that a first feature is "above" or "below" a second feature means that the first and second features are in direct contact. There may be, or the first and second features may be in indirect contact through an intermediate medium. And that a first feature is "above", "above" and "above" a second feature even if the first feature is directly above or diagonally above the second feature. Well, or only represents that the horizontal height of the first feature is higher than the second feature. A first feature being "below", "below" and "below" a second feature may be that the first feature is directly below or diagonal to the second feature, or It only indicates that the horizontal height of the first feature is lower than the second feature.

In this application, terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples" are descriptive to that embodiment or example. It means that the specific feature, structure, material or feature described is included in at least one embodiment or example of this application. Exemplary descriptions of such terms in this specification are not necessarily to the same embodiment or example. And the specific features, structures, materials or features described may be combined in any suitable manner in any one or more embodiments or examples. In addition, a person skilled in the art can combine different implementations or examples and features of different implementations or examples described herein where they are not mutually exclusive.

Although the present application has been described above, the above examples are illustrative only and should not be construed as limiting the present application, and any changes, modifications, permutations and variations to the above examples by those skilled in the art may be made. It should be understood that they are within the protection scope of the present application.

REFERENCE SIGNS LIST 1 constant temperature stirrer 2 temperature probe 3 magneton 4 first automatic titrator 5 first acid/alkali reservoir 6 first metering device 7 first solenoid valve 8 pH composite electrode 9 dissolved oxygen meter probe 10 dissolved oxygen meter 11 air pump 12 flow meter 13 aerator 14 reactor 15 second automatic titrator 16 second acid/alkali storage vessel 17 second metering device 18 second solenoid valve 19 controller

Claims (10)

A sulfite air oxidation system comprising:
a constant temperature stirrer having a temperature probe;
a reactor provided in the constant temperature stirrer and having the temperature probe therein;
a first automatic titrator connected to a pH composite electrode entering said reactor;
A first metering device provided with a first acid/alkali storage vessel, said first acid/alkali storage vessel communicating with said reactor via a first conduit, said first conduit a first metering device having a first solenoid valve attached to the passage, said first solenoid valve being connected to said first automatic titrator;
an air pump in communication with an aeration device provided within the reactor via a second line fitted with a flow meter;
including,
A sulfite air oxidation system characterized by: further comprising a second metering unit and a second automatic titrator, wherein the second metering unit is provided with a second acid/alkali reservoir, the second acid/alkali reservoir being connected to the third line A second solenoid valve is attached to the third conduit, a second automatic titrator is connected to the second solenoid valve, and the second automatic titrator is connected to the reactor through is connected to the pH composite electrode,
2. The sulfite air oxidation system of claim 1, wherein: The pH composite electrode is connected to the first automatic titrator and the second automatic titrator via a controller,
and/or wherein the first acid/alkali reservoir is an acid bottle and the second acid/alkali reservoir is a lye bottle;
3. The sulfite air oxidation system of claim 2, wherein: further comprising a dissolved oxygen meter, said dissolved oxygen meter having a dissolved oxygen meter probe, said dissolved oxygen meter probe extending into said reactor;
and/or the dissolved oxygen meter, the temperature probe, the aerator and the end of the pH composite electrode are all inserted below the liquid level in the reactor,
2. The sulfite air oxidation system of claim 1, wherein: the pH composite electrode is connected to the first automatic titrator via a controller;
5. The sulfite air oxidation system of claim 4, wherein: wherein the controller is a PLC controller;
A sulfite air oxidation system according to claim 3 or 5, characterized in that: The constant temperature stirring device is a constant temperature magnetic stirrer, and a magnet is provided in the reactor.
2. The sulfite air oxidation system of claim 1, wherein: both the first weighing device and the second weighing device are balances;
3. The sulfite air oxidation system of claim 2, wherein: said aerator is one of a nozzle, a micropore aerator and a jet aerator;
2. The sulfite air oxidation system of claim 1, wherein: the reactor is one of a beaker, a flask, an Erlenmeyer flask;
2. The sulfite air oxidation system of claim 1, wherein: