In-situ treatment system and method for ammonia mist on surface of electrolytic manganese cell

Abstract

The application provides an electrolytic manganese cell surface ammonia mist in-situ treatment system and method, which is applied to an electrolytic manganese workshop, and comprises the following: an active aerosol generating module for generating active aerosols; a transmission pipeline, one end of the transmission pipeline being connected with an active aerosol output end of the active aerosol generating module, the other end of the transmission pipeline being arranged above an electrolytic cell in the electrolytic manganese workshop, and the transmission pipeline being used for transmitting the active aerosols to above the electrolytic cell; a first concentration sensor arranged at the other end of the transmission pipeline and used for measuring active aerosol concentration information; a second concentration sensor arranged on the electrolytic cell and used for measuring ammonia mist concentration information; and a controller connected with the active aerosol generating module, the first concentration sensor and the second concentration sensor respectively and used for controlling a working state of the active aerosol generating module according to the active aerosol concentration information and the ammonia mist concentration information. The application can efficiently treat the ammonia mist on the cell surface in-situ, simplifies a treatment process, reduces treatment cost and improves industrial application feasibility.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ammonia mist treatment, in particular to an electrolytic manganese electrolytic cell surface ammonia mist in-situ treatment system and method. BACKGROUND

[0002] China is the largest electrolytic manganese producer, consumer and exporter in the world. During the electrolysis process of electrolytic manganese electrolytic cell, oxygen, ammonia, water vapor and a small amount of hydrogen are released at the same time as manganese is precipitated on the cathode plate. Ammonia reacts with water at a certain height on the cell surface to form mixed ammonia mist. Due to the large area of the electrolysis area in the electrolysis workshop and the complexity of the electrochemical reaction, all electrolysis workshops of domestic and foreign metal manganese plants use unorganized emission, which causes a distinct ammonia odor in the workshop. In order to improve the operating environment of the workshop and control the odor within the allowable range of the environment and occupational health, a suitable gas treatment device needs to be installed. Due to the large number of electrolytic cells, large collection area, large number of operating personnel in the electrolysis area, and irregular daily inspection in the electrolysis workshop, in addition, the ammonia mist volatilized from the cell surface is corrosive, which makes it difficult to collect and treat.

[0003] The current main method for treating ammonia mist on the surface of electrolytic manganese electrolytic cell is divided into two steps: (1) collecting the gas on the cell surface; and (2) absorbing and treating the collected gas.

[0004] In the ammonia mist collection step, the following three collection schemes currently exist:

[0005] ① A movable closed gas collection hood is used. When this method is used, the gas collection hood needs to be moved constantly due to its large span, and requires non-metallic materials that are resistant to corrosion, which greatly limits its application. Glass fiber reinforced plastic is the most suitable material for making the gas collection hood, but its strength is difficult to meet the requirements.

[0006] ② A whole space closed gas exchange type is used. When this method is used, the whole workshop needs to be sealed, which requires a large amount of capital and high operating costs, and in addition, the explosive gases and other dangerous gases released during the electrolysis process, such as ammonia and hydrogen, are collected at the gas collection port, and the environment in the electrolysis area at this location is difficult to meet the standards.

[0007] ③ A blowing and suction type gas exchange method is used by installing a wind pipe on the cell surface. This method has the advantage of not changing the operating habits of workers, but has the disadvantage of high system operating costs. Later, this method was improved to a movable membrane cover type gas exchange scheme with a suction pipe installed on the cell surface, which to some extent achieved effective collection of ammonia mist without affecting the operation of workers, but the equipment is complex and the cost is high.

[0008] In the aspect of gas absorption treatment, the ammonia mist treatment system comprises an absorption tower, a fan, a discharge chimney and the like. The ammonia mist enters the absorption tower and is absorbed by multi-stage water spraying, and after reaching a certain concentration, is reused to the electrolysis workshop for pH value adjustment, and then clean water is added for the next round of spray absorption, so that no waste water is generated and waste gas is discharged up to standard.

[0009] This ammonia mist treatment mode of collecting first and then absorbing is complicated in process, complex in equipment, high in operation cost, and most importantly, it is difficult to achieve effective collection of ammonia mist, and the existing ammonia mist treatment system cannot intervene in the treatment process in real time. Therefore, how to adopt a technical approach to achieve efficient ammonia mist treatment is a technical problem that needs to be solved urgently in the electrolytic manganese electrolysis workshop, and is also an important task related to environmental protection. SUMMARY

[0010] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide an in-situ treatment system and method for ammonia mist on the surface of an electrolytic manganese electrolytic cell.

[0011] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0012] An in-situ treatment system for ammonia mist on the surface of an electrolytic manganese electrolytic cell, applied in an electrolytic manganese electrolysis workshop, comprising:

[0013] An active aerosol generating module for generating and spraying active aerosol and controlling the concentration, temperature, angle and flow rate of the active aerosol;

[0014] A transmission pipeline, one end of the transmission pipeline being connected with the active aerosol output end of the active aerosol generating module, the other end of the transmission pipeline being arranged above the electrolytic cell in the electrolytic manganese workshop, the transmission pipeline being used for transmitting the active aerosol to above the electrolytic cell;

[0015] A first concentration sensor arranged at the other end of the transmission pipeline and used for measuring active aerosol concentration information;

[0016] A second concentration sensor arranged on the electrolytic cell and used for measuring ammonia mist concentration information;

[0017] A controller connected with the active aerosol generating module, the first concentration sensor and the second concentration sensor respectively, and used for controlling the working state of the active aerosol generating module according to the active aerosol concentration information and the ammonia mist concentration information.

[0018] Preferably, the active aerosol generating module comprises:

[0019] An active solvent tank for storing active solvent; the active solvent is composed of one or more of acid, sulfuric acid mixed gas and surfactant.

[0020] a fan and a temperature controller, both connected with the liquid outlet end of the active solvent tank, for blowing and temperature control of the active solvent, to obtain the active aerosol;

[0021] an air suction pipe arranged at one side of the fan, the air suction pipe comprising an air suction end and the active aerosol outlet end; the air suction pipe is used for recycling the active aerosol and transmitting it into the transmission pipeline.

[0022] Preferably, the active aerosol generation module further comprises:

[0023] a temperature sensor arranged at the liquid outlet end of the active solvent tank and connected with the controller, for obtaining a temperature signal of the active aerosol; the controller is further used for controlling the working state of the temperature controller according to the temperature signal.

[0024] Preferably, the concentration of the active solvent hydrogen ion ranges from 0.5 to 9 mol / L.

[0025] Preferably, the temperature of the active aerosol ranges from -10 to 30℃, and the concentration of the active aerosol ranges from 1 to 1000 mg / m 3 .

[0026] Preferably, the angle between the opening of the transmission pipeline and the horizontal plane of the electrolytic cell ranges from 0° to 180°; the distance between the other end of the transmission pipeline and the electrolytic cell ranges from 0.5 to 2 m; the transmission pipeline is in an open rear mode, and the opening shape of the transmission pipeline is circular or strip-shaped.

[0027] Preferably, the controller comprises:

[0028] a signal receiving unit connected with the first concentration sensor and the second concentration sensor respectively, for obtaining the active aerosol concentration information and the ammonia mist concentration information;

[0029] a signal processing unit connected with the signal receiving unit, for signal pre-processing of the active aerosol concentration information and the ammonia mist concentration information respectively, to obtain pre-processing information;

[0030] a curve drawing unit connected with the signal processing unit, for drawing an acid-base neutralization curve according to the pre-processing information;

[0031] a control unit connected with the curve drawing unit, for controlling the opening and closing of the active aerosol generation module according to the acid-base neutralization curve.

[0032] Preferably, the number of the transmission pipelines is at least one; the shell at the other end of the transmission pipeline is provided with a plurality of openings; each of the openings is used for spraying the active aerosol; the included angle between the straight line of spraying the active aerosol at the opening and the horizontal plane ranges from 5° to 75°.

[0033] Preferably, the spraying flow of the transmission pipeline corresponding to each electrolytic cell ranges from 0.1 to 1000 m 3 / h.

[0034] An in-situ treatment method of ammonia mist on the surface of an electrolytic manganese electrolytic cell, comprising:

[0035] Active aerosol is generated by using an active aerosol generating module, and the active aerosol is transmitted to the upper side of the electrolytic cell by using a transmission pipeline;

[0036] The active aerosol concentration information of the outlet end of the transmission pipeline and the ammonia mist concentration information of the electrolytic cell are measured respectively;

[0037] The working state of the active aerosol generating module is controlled according to the active aerosol concentration information and the ammonia mist concentration information.

[0038] According to the specific embodiments provided by the present application, the following technical effects are disclosed:

[0039] This invention provides an in-situ ammonia mist treatment system and method for the surface of an electrolytic manganese cell, applicable to an electrolytic manganese workshop. The system includes: an active aerosol generating module for generating active aerosols; a transmission pipeline, one end of which is connected to the active aerosol output end of the active aerosol generating module, and the other end of which is positioned above the electrolytic cell in the electrolytic manganese workshop, the transmission pipeline being used to transmit the active aerosols to the surface of the electrolytic cell; a first concentration sensor, located at the other end of the transmission pipeline, for measuring active aerosol concentration information; a second concentration sensor, located on the electrolytic cell, for measuring ammonia mist concentration information; and a controller, connected to the active aerosol generating module, the first concentration sensor, and the second concentration sensor respectively, for controlling the working state of the active aerosol generating module based on the active aerosol concentration information and the ammonia mist concentration information. This invention delivers active aerosols with specific temperature, concentration, and particle size distribution at an appropriate angle to the top of an electrolytic cell via a transmission pipeline. Utilizing the temporary descent and reaction characteristics of the ejected active aerosols, they react efficiently with ammonia mist volatilizing and rising from the cell surface during the brief descent. This enables in-situ, efficient treatment of ammonia mist on the cell surface, completely resolving the ammonia mist problem in electrolysis workshops. Simultaneously, it simplifies the processing flow, reduces processing costs, and improves the feasibility of industrial application. Furthermore, this invention uses two sensors to detect the concentration of active aerosols and ammonia mist respectively, thereby controlling the active aerosol generation speed of the active aerosol generation module based on the detected concentration information, thus enabling precise control of the in-situ ammonia mist treatment process. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 The system structure connection diagram provided for the embodiments of the present invention;

[0042] Figure 2 This is a flowchart of a method provided in an embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1-Active aerosol generating module, 2-Transmission pipeline, 3-Electrolysis cell, 4-Controller, 5-First concentration sensor, 6-Second concentration sensor. Detailed Implementation

[0045] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0046] Reference herein to“an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of other embodiments. It is explicitly contemplated that embodiments described herein can be combined with other embodiments.

[0047] The terms“first”,“second”,“third”, and“fourth” and the like in the description and in the claims of the present application and the accompanying drawings are used to distinguish between similar objects, not necessarily in a particular order. Also, the terms“comprises”,“comprising”,“includes”,“including” and any variations thereof are intended to cover a non-exclusive inclusion. For example, a process, method, article, or apparatus that comprises a list of steps, processes, methods, or the like is not limited to the listed steps, processes, methods, or the like, but can optionally include other steps, processes, methods, or the like not listed.

[0048] The purpose of the present application is to provide an electrolytic manganese electrolytic cell surface ammonia mist in-situ treatment system and method, which can efficiently treat the ammonia mist on the surface in-situ, completely solve the problem of ammonia mist in the electrolysis workshop, simplify the treatment process, reduce the treatment cost, and improve the industrial application feasibility.

[0049] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] Figure 1 The system structure connection diagram provided by the embodiments of the present application is shown in Figure 1 As shown in the figure, the present application provides an electrolytic manganese electrolytic cell 3 surface ammonia mist in-situ treatment system, which is applied in an electrolytic manganese workshop, comprising:

[0051] The active aerosol generating module 1 is used to manufacture active aerosol;

[0052] The transmission pipeline 2, one end of the transmission pipeline 2 is connected with the active aerosol output end of the active aerosol generating module 1, the other end of the transmission pipeline 2 is arranged above the electrolytic cell 3 in the electrolytic manganese workshop, and the transmission pipeline 2 is used to transmit the active aerosol to above the electrolytic cell 3;

[0053] a first concentration sensor 5 arranged at the other end of the transmission pipeline 2, configured to measure active aerosol concentration information;

[0054] a second concentration sensor 6 arranged on the electrolytic tank 3, configured to measure ammonia mist concentration information;

[0055] a controller 4 connected with the active aerosol generating module 1, the first concentration sensor 5 and the second concentration sensor 6, respectively, configured to control the working state of the active aerosol generating module 1 according to the active aerosol concentration information and the ammonia mist concentration information.

[0056] Further, the number of the transmission pipeline 2 in the embodiment is at least one; a plurality of openings are arranged on the shell at the other end of the transmission pipeline 2; each of the openings is configured to spray the active aerosol; the straight line of the active aerosol sprayed at the opening and the horizontal plane form an angle in the range of 0°-75°.

[0057] Further, the transmission pipeline in the embodiment is an active aerosol pipeline, the end surface of which is circular or shaped, the pipeline circumference is 10mm-800mm, the pipeline spacing arranged on the tank surface is 300mm-1600mm, the pipeline distance from the liquid surface of the electrolytic tank 3 is 100mm-1000mm, one side or both sides of the pipeline are provided with openings, and the spray angle of the openings is 0°-75°.

[0058] Preferably, the active aerosol generating module 1 comprises:

[0059] an active solvent tank configured to store active solvent; the active solvent; the active solvent is composed of one or more of acid, sulfuric acid mixed gas and surfactant;

[0060] a fan and a temperature controller, both of which are connected with the liquid outlet end of the active solvent tank, configured to blow and heat the active solvent to obtain the active aerosol;

[0061] an air suction pipe arranged on one side of the fan, the air suction pipe comprising an air suction end and the active aerosol output end; the air suction pipe is configured to recycle the active aerosol and transmit it into the transmission pipeline 2.

[0062] Specifically, the fan and the temperature controller in the embodiment can quickly prepare the required active aerosol, i.e. the evaporation speed of the active solvent surface is accelerated by the fan, and the movement speed of the molecules in the active solvent is increased by the temperature controller, thereby further accelerating the formation of the active aerosol.

[0063] Preferably, the active aerosol generating module 1 further comprises:

[0064] A temperature sensor is arranged at the liquid outlet of the active solvent tank and connected with the controller 4 to obtain a temperature signal of the active aerosol; the controller 4 is further configured to control the working state of the temperature controller according to the temperature signal.

[0065] Specifically, the temperature of the active aerosol is -10-30℃, the humidity is 30-98%, and the concentration of the active aerosol is 0.5-500mg / m 3 The active aerosol is a gas containing an acid radical.

[0066] Preferably, the concentration of the active solvent hydrogen ion can also range from 0.5 to 9 mol / L.

[0067] Preferably, the temperature of the active aerosol ranges from 0 to 15℃, and the concentration of the active aerosol ranges from 10 to 300mg / m 3 .

[0068] Preferably, the angle between the other end of the transmission pipeline 2 and the horizontal plane ranges from 0° to 180°, and the distance between the other end of the transmission pipeline 2 and the surface of the electrolytic tank 3 ranges from 0.5 to 2m.

[0069] Preferably, the controller 4 comprises:

[0070] A signal receiving unit connected with the first concentration sensor 5 and the second concentration sensor 6 respectively to obtain the active aerosol concentration information and the ammonia mist concentration information;

[0071] A signal processing unit connected with the signal receiving unit to respectively pre-process the active aerosol concentration information and the ammonia mist concentration information to obtain pre-processing information;

[0072] A curve drawing unit connected with the signal processing unit to draw an acid-base neutralization curve according to the pre-processing information;

[0073] A control unit connected with the curve drawing unit to control the opening and closing of the active aerosol generation module 1 according to the acid-base neutralization curve.

[0074] Optionally, the first concentration sensor 5 and the second concentration sensor 6 are used to measure the concentrations of ammonia mist and active aerosol in real time, so as to adjust the amount of active aerosol and make the acid-base neutralization just right.

[0075] As an optional implementation, the control unit adopts a multi-section control mode for the acid-base neutralization curve, and for a PH value of 0-14, it can be divided into 0(or 14)-D1, D1-D2,..., D n-1 -D nThe n segments are added together, and since control of more than 5 segments is too complex, the acid-base neutralization controller 4 designs a maximum of 5 segments for actual control, namely 0 (or 14)-D1, D1-D2, D2-D3, D3-D4, D4-D5, so that the control unit has two control modes (traditional PID regulation technology and fuzzy control technology simulating artificial thinking) and 5 groups of parameters, corresponding to the control of each segment. By dividing the acid-base neutralization curve into multiple segments, each stage of the acid-base neutralization process can be accurately controlled.

[0076] Preferably, the injection flow of the transmission pipeline 2 ranges from 0.1 to 1000 m 3 / h.

[0077] Figure 2 A method for in-situ treatment of ammonia mist on the surface of an electrolytic manganese cell is also provided in the present embodiment, as shown in the accompanying drawings, comprising: Figure 2

[0078] Step 100: manufacturing active aerosol by using an active aerosol generating module, and transmitting the active aerosol to above the electrolytic cell by using a transmission pipeline;

[0079] Step 200: measuring the active aerosol concentration information of the outlet end of the transmission pipeline and the ammonia mist concentration information of the electrolytic cell, respectively;

[0080] Step 300: controlling the working state of the active aerosol generating module according to the active aerosol concentration information and the ammonia mist concentration information.

[0081] The beneficial effects of the present application are as follows:

[0082] The present application can efficiently treat the ammonia mist on the surface in-situ, completely solve the ammonia mist problem in the electrolytic workshop, simplify the treatment process, reduce the treatment cost, and improve the industrial application feasibility.

[0083] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts of each embodiment can be referred to each other. For the method disclosed in the embodiments, since it corresponds to the system disclosed in the embodiments, the description is relatively simple, and the relevant parts are described in the system part.

[0084] The principles and implementation modes of the present application are described by using specific examples in this paper, and the above embodiment description is only used to help understand the method and core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In view of the above, the content of the specification should not be understood as a limitation of the present application.​

Claims

1. An in-situ treatment system for ammonia mist on the surface of an electrolytic manganese cell, applied in an electrolytic manganese electrolysis workshop, characterized in that, include: An active aerosol generating module is used to generate and spray active aerosols and to control the concentration, temperature, angle and flow rate of the active aerosols. A transmission pipeline, one end of which is connected to the active aerosol output end of the active aerosol generating module, and the other end of which is positioned above the electrolytic cell in the electrolytic manganese electrolysis workshop, the transmission pipeline being used to transmit the active aerosol to the area above the electrolytic cell; A first concentration sensor is located at the other end of the transmission pipeline and is used to measure the concentration information of reactive aerosols. A second concentration sensor is installed on the electrolytic cell to measure ammonia mist concentration information; The controller is connected to the active aerosol generating module, the first concentration sensor, and the second concentration sensor respectively, and is used to control the working state of the active aerosol generating module according to the active aerosol concentration information and the ammonia mist concentration information; The active aerosol generating module includes: A storage tank for storing active solvents; the active solvents are composed of acids and surfactants; The blower and temperature controller are both connected to the liquid outlet of the storage tank to blow the active solvent and control the temperature to obtain the active aerosol. An air intake pipe is disposed on one side of the fan. The air intake pipe includes an intake end and an active aerosol output end. The air intake pipe is used to recover the active aerosol and transport it to the transmission pipeline. The controller includes: A signal receiving unit is connected to the first concentration sensor and the second concentration sensor respectively, and is used to acquire the active aerosol concentration information and the ammonia mist concentration information; A signal processing unit, connected to the signal receiving unit, is used to preprocess the active aerosol concentration information and the ammonia mist concentration information respectively to obtain preprocessed information. A curve plotting unit, connected to the signal processing unit, is used to plot an acid-base neutralization curve based on the preprocessed information. The control unit, connected to the curve plotting unit, is used to control the opening and closing of the active aerosol generating module according to the acid-base neutralization curve.

2. The electrolytic manganese cell cell floor ammonia mist in-situ treatment system of claim 1, wherein, The active aerosol generating module further includes: A temperature sensor is installed at the outlet end of the active solvent tank and connected to the controller to acquire the temperature signal of the active aerosol; the controller is also used to control the working state of the temperature controller according to the temperature signal.

3. The electrolytic manganese cell cell floor ammonia mist in-situ treatment system of claim 1, wherein, The concentration range of hydrogen ions in the active solvent is 0.5~9 mol / L.

4. The electrolytic manganese electrolytic cell cell floor ammonia mist in-situ treatment system according to claim 2, characterized in that, The temperature range of the active aerosol is -10 to 30°C, and the acid concentration range of the active aerosol is 1 to 1000 mg / m³.

5. The electrolytic manganese cell cell floor ammonia mist in-situ treatment system of claim 1, wherein, The angle between the opening of the transmission pipeline and the horizontal plane of the electrolytic cell ranges from 0° to 180°; the distance between the other end of the transmission pipeline and the surface of the electrolytic cell ranges from 0.5 to 2m; the transmission pipeline is an open type, and the opening shape of the transmission pipeline is circular or elongated.

6. The electrolytic manganese cell cell floor ammonia mist in-situ treatment system of claim 1, wherein, The number of the transmission pipelines is at least one; the shell of the other end of the transmission pipeline is provided with a plurality of openings; each of the openings is used for spraying the active aerosol; the included angle between the straight line of spraying the active aerosol at the opening and the horizontal plane ranges from 5° to 75°.

7. The electrolytic manganese electrolytic cell cellface ammonia mist in-situ treatment system according to claim 1, characterized in that, The range of the spraying flow of the transmission pipeline corresponding to each electrolytic cell ranges from 0.1 to 1000 m³ / h.

8. A method for in-situ treatment of ammonia mist on the surface of an electrolytic manganese electrolytic cell, applied to the in-situ treatment system of ammonia mist on the surface of the electrolytic manganese electrolytic cell according to any one of claims 1 to 7, characterized in that, The method comprises the steps of: generating the active aerosol by using an active aerosol generating module and transmitting the active aerosol to the upper side of the electrolytic cell by using a transmission pipeline; respectively measuring the active aerosol concentration information of the outlet end of the transmission pipeline and the ammonia mist concentration information of the electrolytic cell; controlling the working state of the active aerosol generating module according to the active aerosol concentration information and the ammonia mist concentration information.

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