Device for safely treating ammonia-nitrogen-containing waste liquid in material-saving manner

Abstract

The utility model discloses a safe and material-saving treatment device for treating waste liquid containing ammonia nitrogen. The treatment device comprises a chlorine generator, an ammonia removal reaction tank, an inorganic alkali feeding device, a temporary storage tank and a drainage device, the chlorine generator is electrolysis equipment for producing chlorine through an electrolysis process and comprises an electrolytic tank, and a separator is arranged in the electrolytic tank and divides the electrolytic tank into an anode tank area and a cathode tank area; the ammonia removal reaction tank is a corrosion-resistant reaction tank, is provided with a detection device and is used for treating ammonia-nitrogen-containing waste liquid; the inorganic alkali feeding device is used for controlling and feeding inorganic alkali solids and / or an aqueous solution thereof into the ammonia removal reaction tank or the temporary storage tank to participate in reaction according to a result detected by the detection device; the temporary storage tank is used for storing chemical raw materials and / or used as a chemical reaction tank; the drainage device is used for draining chlorine produced by the chlorine generator into the ammonia removal reaction tank and / or the temporary storage tank to participate in chemical reaction. The device disclosed by the utility model meets higher environmental protection requirements, meets the requirements of a safety production method, and is small in occupied funds and good in economic benefits.

Description

Technical Field

[0001] The utility model relates to a technical device for ammonia nitrogen waste liquid treatment process, in particular to a treatment device for safely and material-savingly treating ammonia nitrogen-containing waste liquid. Background Technique

[0002] In industrial production, processes that commonly use chemicals containing ammonia and / or ammonium salts, or processes that newly generate ammonia and / or ammonium salts during production reactions are common. The waste liquid produced during these production processes often contains a certain concentration of ammonia and / or ammonium salts. Ammonia nitrogen refers to the combined nitrogen present in the form of ammonia or ammonium ions. Therefore, the above-mentioned waste liquid containing ammonia and / or ammonium salts can also be called ammonia nitrogen-containing waste liquid. These waste liquids must be treated to meet the national environmental protection discharge standards before they can be discharged. Otherwise, excessive ammonia nitrogen will cause eutrophication of water bodies, consume the oxygen in the water, and damage the aquatic environment.

[0003] The waste liquid from circuit board etching and washing is one of the common ammonia nitrogen-containing waste liquids. Circuit board production enterprises often use acidic etching processes containing ammonium salts and ammonia-alkaline copper ammonia etching processes to etch and produce circuit copper plates. The waste liquid from their etching and washing contains NH4 + and heavy metal impurity pollution. The main components of the most common acidic etching solution containing ammonium salts are hydrochloric acid, copper chloride, and ammonium chloride, and may also contain sodium chloride and ferric chloride. In addition, the main components of the most common ammonia-alkaline copper ammonia etching solution are ammonium chloride, ammonia water, and copper ammonia chloride complex.

[0004] Currently, circuit board production enterprises often use electro-deammoniation treatment methods or directly use sodium hypochlorite solution for oxidative deammoniation to treat the waste liquid from circuit board etching and washing with ammonium salts. Among them,

[0005] ⑴ The electro-deammoniation treatment method specifically introduces the waste liquid from etching and washing the board directly into an electrolytic cell without an electrolytic separator as the electrolyte for electrolytic oxidation, so that chlorine gas and a small amount of chlorine dioxide are generated in the waste liquid, and react with NH3 and NH4 in the solution + to carry out deammoniation treatment through chemical reaction. After deammoniation and solid-liquid separation treatment, a clear liquid is obtained and discharged when the ammonia nitrogen data meets the standard.

[0006] However, the existing electro-deammoniation treatment method has the following five major disadvantages: 1. Using the waste liquid from etching and washing the board with ammonium salts directly as the electrolyte for electrolysis, the electrolytic chlorine evolution efficiency is low because the chlorine salt concentration in the waste liquid is low.

[0007] 2. During electrolysis, a large amount of compounds formed by the combination of chlorine and oxygen are generated, rather than pure chlorine gas, so the deammoniation effect is poor.

[0008] 3. The reaction of producing chlorine gas and ammonia NH3 component in the ammonium salt-containing etching and board-washing waste liquid by direct electrolysis treatment method generates a small amount of chloramine compounds while producing nitrogen gas, which is a new pollution source and does not meet higher environmental protection requirements.

[0009] 4. The deammoniation reaction in the prior art is directly carried out in the electrolytic cell. In addition, the used electrolytic cell has no separation between the anode and cathode compartments. When the concentration of copper ions in the electrolyte is low, hydrogen gas will be electrodeposited on the electrolytic cathode and will be mixed with other gases evolved in the electrolytic cell and the gases generated by the deammoniation reaction, that is, there is a situation of a mixed gas of chlorine gas, oxygen gas, chlorine dioxide, ozone, hydrogen gas, nitrogen gas, and ammonia gas. And the mixture of hydrogen gas and oxidizing gases will form an explosive mixed gas, which will explode if not properly handled, posing a major safety hazard.

[0010] 5. As the electrolytic treatment of the waste liquid for deammoniation progresses, the electrolyte will gradually become acidic. Under acidic conditions, chlorine gas will react with NH3 and NH4+ to form the explosive nitrogen trichloride, thus generating another safety hazard.

[0011] ⑵ Using sodium hypochlorite solution for oxidation deammoniation

[0012] Due to the unstable nature of the sodium hypochlorite solution and the low concentration of the sodium hypochlorite solution on the market, directly using the sodium hypochlorite solution to oxidize the ammonia-nitrogen-containing waste liquid will dilute the sodium hypochlorite solution and the waste liquid with each other, resulting in the need to use a large amount of sodium hypochlorite solution to complete the deammoniation reaction, which is very wasteful of materials and produces a large amount of wastewater discharged.

[0013] In addition to the existing problems of the above-mentioned ammonia-nitrogen removal schemes for etching and board-washing waste liquid that need to be solved, there are various types of ammonia-nitrogen-containing waste liquids, and the market also needs a general-purpose device that is safe, material-saving and applicable to the treatment of various types of ammonia-nitrogen-containing waste liquids.

[0014] Common ammonia-nitrogen-containing waste liquids also include silver ammonia solution silver-making waste liquid, ammonia-containing electroless plating solution, etc. The silver ammonia solution silver-making waste liquid specifically refers to the ammonia-nitrogen-containing waste liquid produced in the production process of making silver powder using silver ammonia solution.

[0015] Utility Model Content

[0016] The purpose of the present utility model is to provide a treatment device for safely and material-savingly treating ammonia-nitrogen-containing waste liquid.

[0017] The technical solution adopted by the present utility model is as follows:

[0018] A treatment device for safely and material-savingly treating ammonia-nitrogen-containing waste liquid, characterized in that it includes a chlorine gas generator, a deammoniation reaction tank, an inorganic base feeding device, a temporary storage tank, and a drainage device; wherein,

[0019] The chlorine generator is an electrolytic device that produces chlorine through an electrolysis process, including an electrolytic cell. A separator is provided in the electrolytic cell to divide the electrolytic cell into an anode cell area and a cathode cell area;

[0020] The ammonia removal reaction tank is a corrosion-resistant reaction tank, equipped with a detection device for treating ammonia-nitrogen-containing waste liquid;

[0021] The inorganic base feeding device is used to control the input of solid inorganic base and / or its aqueous solution into the ammonia removal reaction tank or the temporary storage tank to participate in the reaction according to the results measured by the detection device;

[0022] The temporary storage tank is used to store chemical raw materials and / or as a chemical reaction tank;

[0023] The diversion device is used to divert the chlorine produced by the chlorine generator into the ammonia removal reaction tank and / or the temporary storage tank to participate in the chemical reaction.

[0024] The working principle of the present utility model is as follows: Chlorine is electrolytically produced by the chlorine generator, and the chlorine is diverted through the diversion device into the ammonia-nitrogen-containing waste liquid in the ammonia removal reaction tank, so that the chlorine reacts with water or with an inorganic base to generate hypochlorite ions. The generated hypochlorite ions carry out a chemical reaction on the ammonia and / or ammonium ions in the ammonia-nitrogen-containing waste liquid, thereby achieving the purpose of ammonia removal. When the chlorine reacts with the inorganic base, different hypochlorites are generated according to the different cations in the inorganic base.

[0025] Taking sodium hydroxide as the inorganic base as an example, the present utility model uses the electrolyzed chlorine to produce sodium hypochlorite and reacts with ammonia and / or ammonium ions. The ammonia removal chemical reaction principle is as follows:

[0026] 2NaOH + Cl2 → NaClO + NaCl + H2O

[0027] NH4 + + NaClO → HClO + Na + + NH3

[0028] 3NaClO + 2NH3 → 3NaCl + 3H2O + N2↑

[0029] From the above chemical reaction formulas and principles, it can be seen that as long as the waste liquid contains ammonia and / or ammonium ions, the equipment of the present utility model can be used for treatment. The present utility model controls the pH value of the reaction liquid by adding an alkaline substance to the reaction liquid, which can avoid generating new pollution sources of chloramine substances and explosive nitrogen trichloride, and can safely separate the gas evolved in the anode cell from the gas evolved in the cathode cell during the electrolysis process, avoiding major safety hazards existing in the existing electrolytic ammonia-nitrogen removal treatment method. It not only has a good ammonia removal effect, but also greatly improves the safety of the process and the utilization rate of chlorine.

[0030] In addition, the hypochlorite ions participating in the reaction of the present utility model are directly generated in the ammonia-nitrogen-containing waste liquid. Compared with the prior art in which sodium hypochlorite solution is used for mixed reaction with the ammonia-nitrogen-containing waste liquid, the present utility model does not need to use a large amount of sodium hypochlorite solution. Therefore, the present utility model can significantly save reaction materials, reduce the discharge amount after waste liquid treatment, and can also reduce the volume scale of the treatment device.

[0031] The present utility model can be improved as follows:

[0032] The electrolytic cell separator of the chlorine generator is used to effectively separate the gases evolved on the cathode and anode in the electrolytic cell, so that the gas evolved on the anode in the electrolytic cell during the electrochemical reaction can be conveniently collected and treated, and when there is gas evolution on the cathode, the gases evolved on the anode and cathode can be safely separated. Specifically, it is at least one of a cation exchange membrane, an anion exchange membrane, a bipolar membrane, a reverse osmosis membrane, a filter cloth, and an electrolytic diaphragm without ion selectivity.

[0033] The chlorine generator mainly consists of an electrolytic cell and a gas collector. A separator is provided in the electrolytic cell to divide the electrolytic cell into an anode cell area and a cathode cell area. The gas collector corresponds to the upper parts of the cathode cell area and the anode cell area of the electrolytic cell respectively and is connected to a drainage device, so that the gases evolved on the cathode and anode in the electrolytic cell during the electrochemical reaction can be safely separated for collection and treatment, or the gas evolved from the reaction of the anode electrolyte in the electrolytic cell can be separately collected and treated, that is, the prepared chlorine can be collected and applied with high purity.

[0034] The gas collector of the chlorine generator is an anode gas collecting cover and a cathode gas collecting cover. The anode gas collecting cover and the cathode gas collecting cover are respectively covered on the anode cell area and the cathode cell area of the chlorine generator, so that different gases evolved from the cathode and anode electrolytes can be separately collected and thus separately treated.

[0035] The drainage device can be a combination of a drainage pipeline and a chlorine delivery pump, or a combination of a drainage pipeline and a Venturi ejector.

[0036] The detection device of the ammonia removal reaction tank includes a pH meter and / or an oxidation-reduction potential meter. Among them, the pH meter is used to detect and control inorganic base and / or ammonia-nitrogen-containing waste liquid, and the oxidation-reduction potential meter is used to detect and control oxidant.

[0037] The inorganic base used in the working process of the present utility model can be at least one of sodium hydroxide, potassium hydroxide, calcium hydroxide, sodium carbonate, sodium bicarbonate, potassium carbonate, and potassium bicarbonate. The inorganic base is used to control the pH value of the reaction solution within the target numerical range set by the process.

[0038] Among the above-mentioned inorganic base options, sodium hydroxide would be a better choice.

[0039] During the operation of the present utility model, the inorganic base feeding device will, under the monitoring of a pH meter, feed the inorganic base solid or its aqueous solution into the ammonia removal reaction tank or the temporary storage tank according to the process requirements.

[0040] The anolyte of the chlorine generator of the present utility model uses an electrolyte containing chlorine element. Specifically, the anolyte of the chlorine generator of the present utility model contains hydrochloric acid and / or chloride salt. Among them, the electro-efficiency of electrolytic chlorine can be optimized by adjusting the concentration of hydrochloric acid and / or chloride salt in the anolyte.

[0041] As a preferred embodiment of the present utility model: during the operation of the processing device of the present utility model, when the electrolytic cell separator is a cation exchange membrane, the anolyte in the electrolytic cell can adopt sodium chloride solution and / or potassium chloride solution and / or acidic copper chloride etching waste liquid. When the anolyte uses a solution containing sodium chloride and / or potassium chloride for electrolytic chlorine production, sodium hydroxide and / or potassium hydroxide can be produced in the catholyte and used as the inorganic base in the present utility model, reducing the raw material cost consumed for treating the waste liquid. When the anolyte uses acidic copper chloride etching waste liquid for electrolytic chlorine production, copper metal is electrodeposited on the cathode. This solution avoids the generation of hydrogen, can not only treat the etching waste liquid but also comprehensively utilize the produced chlorine, and has a low chlorine production cost.

[0042] During the chemical reaction treatment process of the ammonia-nitrogen-containing waste liquid of the present utility model, inorganic base can be continuously added to maintain the pH value of the treatment liquid set by the process, which can more effectively utilize chlorine and save the raw materials for producing inorganic base.

[0043] The present utility model can be improved as follows: at least one of the following detection sensors is added to the ammonia removal reaction tank and / or the temporary storage tank: a hydrometer, an acidimeter, a photoelectric colorimeter, a liquid level gauge, a thermometer, an electrolytic power supply output current regulator, and a timer. When a detection sensor is added to the temporary storage tank, the selection range of the detection sensor also includes a pH meter and an oxidation-reduction potentiometer.

[0044] The present utility model can also be improved as follows: at least one chlorine detector and / or at least one hydrogen detector is set, and the chlorine detector and the hydrogen detector are installed in the workshop where the processing device is located. By detecting the air in the workshop space, safety production work for preventing chlorine or hydrogen leakage can be done well.

[0045] The present utility model can also be improved as follows: an automatic detection feeding controller is added to realize the automation of the process of treating the waste liquid and the safety interlock of the chlorine generator.

[0046] In the process of treating ammonia-nitrogen-containing waste liquid with the present utility model, the following process improvements can be made: Select a storage tank with high temperature and corrosion resistance as a reaction kettle, heat the inorganic base solution put into the storage tank, and introduce chlorine gas for chemical reaction after the solution reaches the process requirement temperature to obtain a chlorate solution. Then add hydrochloric acid to the chlorate solution, and the reaction produces chlorine gas and a chlorine dioxide solution, which are introduced into an ammonia removal reaction tank with a detection device to carry out an ammonia removal chemical reaction with the ammonia-nitrogen-containing waste liquid in the tank. Thus, the effect of two oxidants, hypochlorite and chlorine dioxide, participating in the reaction together can be achieved, and it is also helpful to decompose the organic impurities in the waste liquid.

[0047] Taking sodium hydroxide as the inorganic base to produce sodium chlorate as the oxidant, the chemical reaction is as follows:

[0048]

[0049]

[0050] The present utility model can also be improved as follows: Add a combination of a jet ejector and a storage tank, and / or a spray tower, which are used for gas-liquid mixing reaction or tail gas treatment. In the combination of the jet ejector and the storage tank, the jet ejector is used to fill the gas into the solution in the storage tank for mixing reaction.

[0051] The present utility model can also be improved as follows: Add a solid-liquid separator, and the solid-liquid separator is arranged on the output pipeline of the ammonia removal reaction tank. After the ammonia-nitrogen-containing waste liquid is subjected to ammonia removal treatment, the treatment liquid is subjected to solid-liquid separation treatment. The qualified filtrate can be directly discharged, and the hazardous waste filter residue is treated according to the requirements of relevant environmental protection regulations.

[0052] The present utility model can also be improved as follows: Add a cold and hot temperature exchanger, which is used to control the temperature of the ammonia-nitrogen-containing waste liquid and / or electrolyte and / or inorganic base solution during the treatment process of the treatment device, and use the temperature control to promote chemical reactions and make the production safe, efficient and energy-saving.

[0053] The present utility model can also be improved as follows: Add a liquid stirrer, which is used to stir the solution. The stirrer structure can be a mechanical impeller type and / or a pump liquid circulation reflux type, and the chemical reaction speed of the solution is increased by uniform stirring.

[0054] The present utility model has the following advantages compared with the prior art:

[0055] 1. The chlorine generator adopted by the present utility model can be used for comprehensive environmental protection treatment during chlorine production, so that the chlorine production cost is low.

[0056] 2. During the process of adding chlorine to remove ammonia nitrogen in the present utility model, the reaction liquid can maintain the pH value set by the process and will not produce new pollution sources of chloramine compounds, meeting higher environmental protection requirements.

[0057] 3. During the process of removing ammonia nitrogen in the present utility model, oxidizing gases such as chlorine, oxygen, ozone, and chlorine dioxide can be safely separated from and collected and processed with reducing hydrogen, eliminating the potential safety hazards existing in the prior art and meeting the requirements of the Work Safety Law.

[0058] 4. The present utility model has high chlorine evolution efficiency, small capital occupation, and good economic benefits.

[0059] 5. The present utility model has a wide range of applications and can be applied to the treatment of various ammonia nitrogen-containing waste liquids. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 It is a schematic structural principle diagram of a device for safely and material-savingly treating ammonia nitrogen-containing waste liquid according to Embodiment 1 of the present utility model;

[0061] Figure 2 It is a schematic structural principle diagram of a device for safely and material-savingly treating ammonia nitrogen-containing waste liquid according to Embodiment 2 of the present utility model;

[0062] Figure 3 It is a schematic structural principle diagram of a device for safely and material-savingly treating ammonia nitrogen-containing waste liquid according to Embodiment 3 of the present utility model;

[0063] Figure 4 It is a schematic structural principle diagram of a device for safely and material-savingly treating ammonia nitrogen-containing waste liquid according to Embodiment 4 of the present utility model;

[0064] Figure 5 It is a schematic structural principle diagram of a device for safely and material-savingly treating ammonia nitrogen-containing waste liquid according to Embodiment 5 of the present utility model.

[0065] The meanings of the reference numerals in the drawings are as follows:

[0066] 1 - Chlorine gas generator, 2 - Ammonia removal reaction tank with detection device, 3 - Inorganic base solid feeding device, 4 - Inorganic base solution feeding device, 5 - Electrolysis power supply, 6 - Separator, 7 - Electrolysis anode, 8 - Electrolysis cathode, 9 - Anode gas collecting cover, 10 - Cathode gas collecting cover, 11 - Thermometer, 12 - Hydrometer, 13 - pH meter, 14 - Redox potential meter, 15 - Liquid level gauge, 16 - Acidimeter, 17 - Photoelectric colorimeter, 18 - Liquid level gauge, 19 - Current regulator, 20 - Hydrogen gas concentration detector, 21 - Heat and cold temperature exchanger, 22 - Heat and cold temperature exchanger, 23 - Ejector, 24 - Ejector, 25 - Chlorine gas delivery pump, 26 - Chlorine gas delivery pump, 27 - Spray tower, 28 - Spray tower, 29 - Spray tower, 30 - Overflow buffer tank, 31 - Overflow buffer tank, 32 - Overflow buffer tank, 33 - Overflow buffer tank, 34 - Other production material feeding device, 35 - Automatic detection feeding control machine, 36 - Valve, 37 - Valve, 38 - Valve, 39 - Valve, 40 - Valve, 41 - Valve, 42 - Valve, 43 - Valve, 44 - Valve, 45 - Valve, 46 - Valve, 47 - Inorganic base solid, 48 - Inorganic base solution, 49 - Hydrochloric acid, 50 - Chloride salt solid, 51 - Chloride salt solution, 52 - Chlorine gas, 53 - Sodium hypochlorite solution, 54 - Chlorine dioxide solution, 55 - Treated waste liquid, dischargeable clear liquid, 56 - Other electrolyte solutions, 57 - Clear water, 58 - Temporary storage tank, 59 - Temporary storage tank, 60 - Temporary storage tank, 61 - Temporary storage tank, 62 - Temporary storage tank, 63 - Temporary storage tank, 64 - Temporary storage tank, 65 - Temporary storage tank, 66 - Impeller agitator, 67 - Impeller agitator, 68 - Pump liquid flow circulating agitator, 69 - Pump liquid flow circulating agitator, 70 - Solid-liquid separator, 71 - Solid-liquid separator, 72 - Pump, 73 - Pump, 74 - Pump, 75 - Pump, 76 - Pump, 77 - Pump, 78 - Pump, 79 - Pump, 80 - Pump, 81 - Pump, 82 - Pump, 83 - Pump, 84 - Pump, 85 - Pump, 86 - Pump, 87 - Pump, 88 - Pump, 89 - Pump, 90 - Pump, 91 - Acidic etchant waste liquid for board washing, 92 - Ammonia-based alkaline copper ammonia etchant waste liquid for board washing, 93 - Acidic copper chloride etchant waste liquid, 94 - Ammonia-based alkaline copper ammonia chloride etchant waste liquid, 95 - Silver waste liquid from silver ammonia solution preparation, 96 - Bubbling gas-liquid mixer, 97 - Metallic copper. Detailed implementation mode

[0067] The following combines specific embodiments to elaborate on the technical solutions of the present utility model so that those skilled in the art can better understand and implement it.

[0068] In the following embodiments, for the chlorine gas generator, ammonia removal reaction tank with a detection device, inorganic base feeding device, temporary storage tank, spray tower, ejector, stirrer, other production material feeding devices, automatic detection and feeding control machine, detection sensor, valve, and pump, those skilled in the art can make a conventional selection, or can choose other products with similar performances to the above products listed in the present invention, and all can achieve the purpose of the process technology of the present invention.

[0069] Embodiment 1

[0070] As Figure 1 shown, a treatment device for safely and material-savingly treating ammonia-nitrogen-containing waste liquid in this embodiment includes a chlorine gas generator 1, an ammonia removal reaction tank 2 with a pH meter, an inorganic base solution feeding device 4, an electrolytic power supply 5, an electrolytic cell separator 6, an electrolytic anode 7, an electrolytic cathode 8, a chlorine gas delivery pump 25, a temporary storage tank 59, and a valve 37. The inorganic base solution feeding device 4 is a kind of inorganic base feeding device.

[0071] The chlorine gas generator 1 is an electrolytic device that produces chlorine gas through an electrolysis process. The chlorine gas generator 1 is provided with an electrolytic cell, an anode gas collecting cover 9 and a cathode gas collecting cover 10. An electrolytic cell separator 6 for separating the cathode and anode electrolytes is provided in the electrolytic cell. The anode gas collecting cover 9 and the cathode gas collecting cover 10 are respectively covered on the electrolytic anode and electrolytic cathode of the electrolytic cell, and air outlets are respectively provided on the anode gas collecting cover 9 and the cathode gas collecting cover 10.

[0072] The electrolytic cell separator 6 of this embodiment is an anion exchange membrane. This embodiment sets a temporary storage tank 59 for storing the inorganic base solution 48.

[0073] Among them, the ammonia removal reaction tank is a corrosion-resistant reaction tank, and the pH meter is a detection device provided on the ammonia removal reaction tank of this embodiment.

[0074] In this embodiment, the inorganic base used by the safety treatment device during the treatment process is a mixed solution of potassium hydroxide, sodium hydroxide, sodium carbonate, and sodium bicarbonate. The waste liquid to be treated is the waste liquid for producing silver from a silver ammonia solution, and the ammonia-nitrogen concentration is 1160 mg / L.

[0075] The treatment process of the safety treatment device in this embodiment when in use is as follows:

[0076] Before use, prepare the electrolytic cell of the chlorine generator 1. The electrolytic anode 7 is connected to the positive pole of the electrolytic power supply 5, and the electrolytic cathode 8 is connected to the negative pole of the electrolytic power supply 5. Pour a chloride solution mainly composed of sodium chloride into the anode cell area of the electrolytic cell as the anolyte, and pour the acidic copper chloride etching waste liquid 93 into the cathode cell area of the electrolytic cell as the catholyte. Add the silver ammonia solution silver-making waste liquid 95 into the ammonia removal reaction tank 2 equipped with a pH meter, and then control the addition of the inorganic base liquid 48 in the tank 59 to the ammonia removal reaction tank 2 through the inorganic base feeding device 4 controlled by the pH meter. The chlorine produced by the chlorine generator is added to the ammonia removal reaction tank 2 for the ammonia removal reaction treatment process route.

[0077] Close the switch of the chlorine generator 1 to make the electrolytic power supply 5 work. The anolyte in the electrolytic cell escapes chlorine for use, and copper metal is electrodeposited on the electrolytic cathode 8. The chlorine is led by the chlorine delivery pump 25 to the bubbling gas-liquid mixer 96 in the ammonia removal reaction tank 2 to participate in the chemical reaction.

[0078] Manually control the output current value and reaction time of the electrolytic power supply 5, and control the addition of the inorganic base feeding device 4 according to the data detected by the pH meter on the ammonia removal reaction tank 2 to maintain the pH value of the reaction solution at pH 9.5. After the ammonia removal reaction for 4 hours, turn off the chlorine generator.

[0079] Inspect the treated liquid in the ammonia removal reaction tank 2 equipped with a pH meter, and the ammonia nitrogen content of the treated silver ammonia solution silver-making waste liquid is 80 mg / L.

[0080] Example 2

[0081] As Figure 2 shown, a treatment device for safely and economically treating ammonia nitrogen-containing waste liquid in this embodiment includes a chlorine generator 1, an ammonia removal reaction tank 2 equipped with a pH meter, an inorganic base solution feeding device 4, an electrolytic power supply 5, an electrolytic cell separator 6, an electrolytic anode 7, an electrolytic cathode 8, a heat and cold temperature exchanger 21, a chlorine delivery pump 25, a temporary storage tank 59, and a valve 37. The inorganic base solution feeding device 4 is a kind of inorganic base feeding device.

[0082] The chlorine generator 1 is an electrolytic device that produces chlorine through an electrolysis process. The chlorine generator 1 is provided with an electrolytic cell, an anode gas collecting cover 9, and a cathode gas collecting cover 10. An electrolytic cell separator 6 for separating the catholyte and anolyte is provided in the electrolytic cell. The anode gas collecting cover 9 and the cathode gas collecting cover 10 are respectively covered on the electrolytic anode and electrolytic cathode of the electrolytic cell, and air holes are respectively provided on the anode gas collecting cover 9 and the cathode gas collecting cover 10.

[0083] The electrolytic cell separator 6 in this embodiment is a filter cloth. In this embodiment, a temporary storage tank 58 is set as a chemical reaction tank, and the temporary storage tank 59 is used to store the inorganic base solution 48.

[0084] Among them, the ammonia removal reaction tank is a corrosion-resistant reaction tank, and the pH meter is a detection device provided on the ammonia removal reaction tank of this embodiment.

[0085] In this embodiment, the inorganic base used in the treatment process of the treatment device is a mixed solution of potassium hydroxide and sodium hydroxide. The ammonia nitrogen waste liquid to be treated is the acidic etching and board washing waste liquid 91, and its ammonia nitrogen concentration is 700 mg / L.

[0086] The usage process of the safety and material-saving treatment device of this embodiment is as follows:

[0087] Before use, prepare the electrolytic cell of the chlorine generator 1. The electrolytic anode 7 is connected to the positive pole of the electrolytic power supply 5, and the electrolytic cathode 8 is connected to the negative pole of the electrolytic power supply 5. Pour the acidic copper chloride etching waste liquid 93 into the anode cell area of the electrolytic cell as the anode electrolyte, and also pour the acidic copper chloride etching waste liquid 93 into the cathode cell area of the electrolytic cell as the cathode electrolyte. Add the acidic etching and board washing waste liquid 91 to the ammonia removal reaction tank 2 equipped with a pH meter according to the liquid level, and then control the inorganic base feeding device 4 to pour the inorganic base solution in the tank 59 into the ammonia removal reaction tank 2 according to the set value of the pH meter. The exothermic reaction of the reaction liquid in the tank 2 causes the liquid temperature to rise, resulting in the volatilization of ammonia in the reaction liquid and polluting the environment. Therefore, turn on the cold and hot temperature exchanger 21 for cooling.

[0088] Close the switch of the chlorine generator 1 to make the electrolytic power supply 5 work. The chlorine gas escaped from the anode electrolyte of the electrolytic cell is led to the ammonia removal reaction tank 2 by the chlorine gas delivery pump 25. The chlorine gas is dissolved in the reaction liquid through the bubbling gas-liquid mixer 26 and undergoes an ammonia removal chemical reaction. Copper is deposited on the cathode electroanalysis. Add inorganic base to the reaction liquid in the reaction tank 2 to maintain the pH value of the reaction liquid at 8.5. After 2 hours of reaction time, turn off the electrolytic power supply 5 and the chlorine gas delivery pump 25 to stop supplying chlorine gas to the ammonia removal reaction tank 2.

[0089] Inspect the solution that has undergone ammonia removal treatment in the ammonia removal reaction tank 2 equipped with a pH meter, and it is found that the ammonia nitrogen impurity concentration of the treated solution is 30 mg / L.

[0090] Example 3

[0091] As Figure 3As shown in the figure, a treatment device for safely and economically treating ammonia nitrogen-containing waste liquid in this embodiment includes a chlorine gas generator 1, an ammonia removal reaction tank 2 with a pH meter and an oxidation-reduction potential meter, an inorganic base solid feeding device 3, an inorganic base solution feeding device 4, an electrolytic power supply 5, an electrolytic cell separator 6, an electrolytic anode 7, an electrolytic cathode 8, an anode gas collecting cover 9, a cathode gas collecting cover 10, a thermometer 11, a hydrometer 12, a pH meter 13, an oxidation-reduction potential meter 14, a liquid level meter 15, an acidity meter 16, a photoelectric colorimeter 17, a liquid level meter 18, a cold and hot temperature exchanger 21, a jet pump 23, a chlorine gas delivery pump 25, storage tanks 58, 59 and 60, an impeller stirrer 66, valves 37, 38 and 39, and pumps 73 and 74. The inorganic base solid feeding device 3 and the inorganic base solution feeding device 4 are both inorganic base feeding devices, which are used for solids and liquids respectively.

[0092] The chlorine gas generator 1 is an electrolytic device that produces chlorine gas through an electrolysis process. The chlorine gas generator 1 is provided with an electrolytic cell, an anode gas collecting cover 9 and a cathode gas collecting cover 10. An electrolytic cell separator 6 for separating the cathode and anode electrolytes is provided in the electrolytic cell. The anode gas collecting cover 9 and the cathode gas collecting cover 10 are respectively covered on the electrolytic anode and the electrolytic cathode of the electrolytic cell, and air outlets are respectively provided on the anode gas collecting cover 9 and the cathode gas collecting cover 10.

[0093] The electrolytic cell separator 6 of this embodiment is a reverse osmosis membrane. Three storage tanks 58, 59 and 60 are provided in this embodiment.

[0094] Among them, the ammonia removal reaction tank is a corrosion-resistant reaction tank, and the pH meter and the oxidation-reduction potential meter are detection devices provided on the ammonia removal reaction tank of this embodiment.

[0095] In this embodiment, the inorganic base used in the treatment process of the treatment device is sodium hydroxide. The ammonia nitrogen-containing waste liquid to be treated is an acidic etching and board washing waste liquid 91, the ammonia nitrogen concentration of which is 550 mg / L, and the COD is 620 mg / L.

[0096] The treatment process of the safe and material-saving treatment device of this embodiment is to first produce the oxidant sodium chlorate, and then produce chlorine gas and chlorine dioxide to react with the acidic etching and board washing waste liquid for ammonia removal.

[0097] The usage process of the treatment device of this embodiment is as follows:

[0098] Before use, prepare the electrolytic cell of the chlorine generator 1. The electrolytic anode 7 is connected to the positive pole of the electrolytic power supply 5, and the electrolytic cathode 8 is connected to the negative pole of the electrolytic power supply 5. Add hydrochloric acid 49 to the anode tank area of the electrolytic cell, and add sodium chloride solution 51 to the cathode tank area of the electrolytic cell, so that the electrolytic anode and the electrolytic cathode are respectively immersed in their electrolytes. Add clear water 57 to the temporary storage tank 59, and its water level is monitored by the liquid level gauge 15. The solid inorganic base feeding device 3 adds solid inorganic base to the temporary storage tank 59, and its feeding amount is monitored by the hydrometer 12. Turn on the cold and hot temperature exchanger 21 to heat the solution in the temporary storage tank 59, and the process temperature is monitored by the thermometer 11. The temporary storage tank 59 is a chemical reaction kettle with stirring and sensors. Add the acidic etched circuit board waste liquid 91 and the inorganic base solution 48 in the temporary storage tank 60 to the ammonia removal reaction tank 2 with a pH meter and an oxidation-reduction potentiometer, and its liquid level is monitored by the liquid level gauge 18.

[0099] Close the switch to make the electrolytic power supply 5 work, and start the impeller stirrer 66 to stir the solution in the temporary storage tank 59. During the electrolysis operation, the chlorine gas evolved from the anode electrolyte in the electrolytic cell is used, and the hydrogen gas evolved from the cathode electrolyte is discharged into the air at high altitude.

[0100] Drain the chlorine gas evolved by the chlorine generator 1 into the concentrated hot inorganic base solution in the temporary storage tank 59 through the chlorine gas transfer pump 25 to participate in the chemical reaction. After the reaction, sodium chlorate is mainly generated, and the generation process of sodium chlorate is monitored by the pH meter 13 and the oxidation-reduction potentiometer 14 at the same time. When the concentration of the sodium chlorate solution in the temporary storage tank 59 reaches the process requirements, turn off the power switch of the chlorine generator 1 and stop the chlorine gas transfer pump 25, and add the hydrochloric acid in the temporary storage tank 58 to the temporary storage tank 59 through the valve 36 and the pump 72, so that the sodium chlorate solution produces chlorine gas and chlorine dioxide, and the process is monitored by the acidity meter 16 and / or the pH meter 13.

[0101] Introduce the chlorine gas produced in the temporary storage tank 59 into the ammonia removal reaction tank 2 with detection devices through the ejector 23 to participate in the reaction; put the relatively high-temperature chlorine dioxide solution 54 in the temporary storage tank 59 into the ammonia removal reaction tank 2 through the valve 37 and the pump 73 to participate in the reaction to accelerate the degradation of organic impurities in the waste liquid, and the feeding amount of the process is monitored by the oxidation-reduction potentiometer of the ammonia removal reaction tank 2. The ejector 23 sucks the chlorine gas generated by the reaction in the temporary storage tank 59 into the ammonia removal reaction tank 2 with a pH meter and an oxidation-reduction potentiometer to participate in the reaction. At the same time, add the inorganic base solution 48 in the temporary storage tank 60 to the ammonia removal reaction tank 2 through the inorganic base solution feeding device 4 to participate in the reaction to maintain the pH value of the reaction solution at 7.3, and the inorganic base solution feeding device 4 is monitored by the pH meter on the ammonia removal reaction tank 2.

[0102] When the redox potentiometer, pH meter in the ammonia removal reaction tank 2 equipped with a pH meter and a redox potentiometer, and the photoelectric colorimeter 17 installed for detecting the color of the reaction solution have all reached and maintained above the process set value and the reaction has run for 90 minutes, it indicates that the ammonia removal index meets the process requirements. Chemical tests were performed on the solution that had undergone ammonia removal treatment, and it was found that the concentration of ammonia nitrogen impurities in the solution was 60 mg / L, and the COD value was 220 mg / L.

[0103] Example 4

[0104] As Figure 4 shown, a treatment device for safely and material-savingly treating ammonia-nitrogen-containing waste liquid in this embodiment includes a chlorine generator 1, an ammonia removal reaction tank 2 with a redox potentiometer, an inorganic base solution feeding device 4, an electrolytic power supply 5, an electrolytic cell separator 6, an electrolytic anode 7, an electrolytic cathode 8, a photoelectric colorimeter 12, a liquid level meter 13, a timer 14, a pH meter 15, a jet ejector 23, a chlorine delivery pump 25, a spray tower 27, a spray tower 28, a solid-liquid separator 70, temporary storage tanks 58 and 59, valves 36, 38, 39 and 40, and pumps 72, 74 and 75.

[0105] The chlorine generator 1 is an electrolytic device that produces chlorine through an electrolysis process. The chlorine generator 1 is provided with an electrolytic cell, an anode gas collection cover 9 and a cathode gas collection cover 10. An electrolytic cell separator 6 for separating the cathode and anode electrolytes is provided in the electrolytic cell. The anode gas collection cover 9 and the cathode gas collection cover 10 are respectively covered on the electrolytic anode and electrolytic cathode of the electrolytic cell, and air vents are respectively provided on the anode gas collection cover 9 and the cathode gas collection cover 10.

[0106] The electrolytic cell separator 6 of this embodiment is a bipolar membrane. Two temporary storage tanks 58 and 59 are provided in this embodiment.

[0107] Among them, the ammonia removal reaction tank is a corrosion-resistant reaction tank, and the redox potentiometer is a detection device provided on the ammonia removal reaction tank 2 of this embodiment.

[0108] In this embodiment, the inorganic base used in the treatment process of the treatment device is sodium carbonate. The waste liquid that needs to be treated for ammonia removal is the ammonia-alkaline copper ammonia etching and board washing waste liquid 92, and its ammonia nitrogen concentration is 1020 mg / L.

[0109] The treatment process of the safe and material-saving treatment device in this embodiment during use is as follows:

[0110] Before use, prepare the electrolytic cell of the chlorine generator 1, the electrolytic anode 7 is connected to the positive electrode of the electrolytic power supply 5, and the electrolytic cathode 8 is connected to the negative electrode of the electrolytic power supply 5. Add hydrochloric acid 49 to the anode tank area of ​​the electrolytic cell, and add other soluble electrolyte solutions 56 to the cathode tank area of ​​the electrolytic cell, so that the anode and cathode are immersed in their respective electrolytes. Add ammonia alkaline copper ammonia etching plate washing waste liquid 92 to the ammonia removal reaction tank 2 with a redox potentiometer, and the liquid level is monitored by a liquid level meter 13. The inorganic alkali solution feeding device 4 is controlled by the joint control of the pH meter 15 and the timer 14 to make the feeding intermittent time feeding, so that the added inorganic alkali solution 48 can evenly participate in the reaction in the ammonia removal reaction tank 2 with a redox potentiometer.

[0111] A two-stage tail gas treatment system is prepared. The first stage uses a gas-liquid reaction device combining an ejector 23 and a temporary storage tank 59 to absorb and treat the tail gas, and the temporary storage tank 59 is filled with a dilute inorganic alkali solution to absorb and treat the tail gas from the spray tower 27 and the tail gas from the ammonia removal reaction tank 2. The second stage uses a spray tower 28 to absorb and treat the tail gas escaping from the temporary storage tank 59, wherein the spray tower 28 is filled with clean water 57.

[0112] The switch is closed to start the electrolysis power supply 5. During the electrolysis operation, chlorine gas released from the anode electrolyte in the electrolytic cell is used, and hydrogen gas released from the cathode electrolyte is discharged into the air.

[0113] The chlorine gas precipitated from the chlorine generator 1 is led to the spray tower 27 through the chlorine delivery pump 25 to participate in the gas-liquid mixing reaction. The spray tower 27 is composed of a valve 36, a pump 72, and a solid-liquid separator 70 to extract the solution in the ammonia removal reaction tank 2 with a redox potentiometer as a spray liquid. During the ammonia removal process, the spray liquid passes through the solid-liquid separator 70 to separate the solid compounds in the spray liquid into solid and liquid. The value of the redox potentiometer of the ammonia removal reaction tank 2 changes. In order to maintain the ORP value of the treated liquid, the operator is required to control the current output value of the electrolytic power supply 5 and the inorganic alkaline solution feeding device 4 controls the addition of inorganic alkaline solution to the ammonia removal reaction tank 2 according to the pH meter 15 to maintain the pH value of the reaction liquid at pH 10.2 for ammonia removal treatment.

[0114] When the redox potential meter and / or photoelectric colorimeter 12 carried in the ammonia removal reaction tank 2 reaches and maintains the process setting value and reacts for 3.5 hours, it means that the numerical value of the ammonia alkaline copper ammonia etching plate washing waste liquid for ammonia removal treatment has reached the process requirement. The treatment liquid is tested to obtain an ammonia nitrogen concentration of 22 mg / L. The solution that has been treated with ammonia removal is treated by valve 37, pump 73 and solid-liquid separator 71, and the ammonia removal solution 55 that has reached the standard is directly discharged after filtering.

[0115] Example 5

[0116] like Figure 5As shown, a treatment device for safely and material - savingly treating ammonia - nitrogen - containing waste liquid in this embodiment includes a chlorine gas generator 1, an ammonia - removing reaction tank 2 with a pH meter and an oxidation - reduction potential meter, an inorganic base solution feeding device 4, an electrolysis power supply 5, an electrolytic cell separator 6, an electrolytic anode 7, an electrolytic cathode 8, a hydrometer 11, a hydrometer 12, a pH meter 13, a hydrometer 14, a liquid level gauge 15, a liquid level gauge 16, a photoelectric colorimeter 17, a chlorine gas concentration detector 18, a current regulator 19, a hydrogen gas concentration detector 20, a jet injector 23, a spray tower 27, other production material feeding devices 34, an automatic detection and feeding control machine 35, temporary storage tanks 58, 59, 60, 61, 62 and 63, an impeller stirrer 66, solid - liquid separators 70 and 71, valves and pumps.

[0117] The chlorine gas generator 1 is an electrolytic device that produces chlorine gas through an electrolysis process. The chlorine gas generator 1 is provided with an electrolytic cell, an anode gas - collecting cover 9 and a cathode gas - collecting cover 10. An electrolytic cell separator 6 for separating the cathode and anode electrolytes is arranged in the electrolytic cell. The anode gas - collecting cover 9 and the cathode gas - collecting cover 10 are respectively covered on the electrolytic anode and the electrolytic cathode of the electrolytic cell, and air outlets are respectively arranged on the anode gas - collecting cover 9 and the cathode gas - collecting cover 10.

[0118] The electrolytic cell separator 6 of this embodiment is a cation - exchange membrane.

[0119] In this embodiment, the inorganic base used in the treatment process of the safe and material - saving treatment device is sodium hydroxide. The ammonia - nitrogen - containing waste liquid to be treated is an ammonia - alkaline copper - ammonia etching and board - washing waste liquid, and its ammonia - nitrogen concentration is 950 mg / L.

[0120] The usage process of the safe and material - saving treatment device in this embodiment is as follows:

[0121] Before use, prepare the electrolytic cell of the chlorine gas generator 1. Connect the electrolytic anode 7 to the positive pole of the electrolysis power supply 5, and connect the electrolytic cathode 8 to the negative pole of the electrolysis power supply 5. Add sodium chloride liquid 51 to the anode tank area of the electrolytic cell, and add inorganic base solution 48 to the cathode tank area of the electrolytic cell, so that the electrolytic anode and the electrolytic cathode are respectively immersed in their respective electrolytes.

[0122] The temporary storage tank 60 is a circulation tank for storing the anolyte of sodium chloride solution 51. Its liquid flow direction is to pump the sodium chloride solution 51 into the anode tank area of the electrolytic cell through the valve 38 and the pump 76 for electrochemical chlorine evolution reaction. Subsequently, the electrolyte flows out from the overflow port of the anode tank area of the electrolytic cell into the overflow buffer tank 32, and is pumped back to the temporary storage tank 60 by the pump 75. During the electrolysis process, the raw materials for the production of sodium chloride are continuously consumed, so the loaded sodium chloride solid is put into the temporary storage tank 61 from the solid feeding device 34 for dissolution. The solution in the temporary storage tank 61 is pumped from the temporary storage tank 60 by the valve 39 and the pump 77 as a solvent, and fresh water 57 can be added as a supplement according to the process requirements during the process. The saturated brine produced in the temporary storage tank 61 is directed to the temporary storage tank 60 to supplement the concentrated sodium chloride solution 51 after passing through the solid-liquid separator 70, and its addition amount is monitored by the hydrometer 12. To achieve a higher chlorine evolution effect in the chlorine generator 1, hydrochloric acid 49 added to the temporary storage tank 63 is monitored by the pH meter 13 and added to the temporary storage tank 60 to adjust the acidity.

[0123] The temporary storage tank 59 is a circulation tank for storing the catholyte of inorganic base solution 48. Its liquid flow direction is to pump the solution 48 into the cathode electrolytic cell through the valve 37 and the pump 73. After the reaction, it flows from the overflow port of the cathode tank area of the electrolytic cell into the overflow buffer tank 31, and is pumped back to the temporary storage tank 59 by the pump 74 for circulating flow. During the electrolysis process, the concentration of the inorganic base solution in the temporary storage tank 59 continuously increases. Therefore, the addition of fresh water 57 is monitored by the hydrometer 11 for dilution, and the excess solution overflows into the overflow buffer tank 30 and is then pumped into the temporary storage tank 58 by the pump 72 for temporary storage.

[0124] The spray tower 27 is a tail gas processor, which specifically treats the tail gas evolved from the ammonia removal reaction tank 2 equipped with a pH meter and an oxidation-reduction potentiometer.

[0125] A mixed solution of acidic etched circuit board waste liquid 91 and ammonia-based alkaline copper ammonia etched circuit board waste liquid 92 is fed into the ammonia removal reaction tank 2 equipped with a pH meter and an oxidation-reduction potentiometer.

[0126] After the preparatory work is ready, the automatic detection and feeding control machine 35 controls the switch-on of the electric switch to make the electrolysis power supply 5 work. During the electrolysis operation process, the output working current of the electrolysis power supply 5 is controlled by the automatic detection and feeding control machine 35 to adjust the magnitude or shut down according to the process requirements. The chlorine evolved from the anolyte is used, and the hydrogen evolved from the catholyte is discharged into the air at high altitude.

[0127] The ejector 23 attracts the chlorine evolved from the chlorine generator 1 into the ammonia removal reaction tank 2 equipped with a pH meter and an oxidation-reduction potentiometer to participate in the reaction. During the process, the pH meter monitors the addition amount of the inorganic base solution feeding device 4 to the ammonia reaction tank 2; the oxidation-reduction potentiometer monitors the input amount of chlorine by controlling the magnitude or shut down of the current output of the current regulator 19 of the electrolysis power supply 5 to control the input of the oxidant.

[0128] During the process, the automatic detection and feeding device 35 monitors the chlorine gas detector 18 and hydrogen gas detector 20 installed on the production workshop site, and alarms and stops the machine in case of abnormalities.

[0129] When the pH meter, redox potentiometer, and photoelectric colorimeter in the ammonia removal reaction tank 2 with the pH meter and redox potentiometer 17 reach and maintain above the set value of the process and operate for 2 hours, it indicates that the numerical value of the ammonia removal treatment of the etching and washing board waste liquid in the reaction tank 2 has reached the process requirements. The treated solution is tested, and the concentration of ammonia nitrogen impurities is 62 mg / L. The treated liquid can be subjected to solid-liquid separation treatment through the valve 42, the pump 80, and the solid-liquid separator 71, and the filtered solution 55 is pumped into the storage tank 62 for further treatment.

[0130] The above embodiments of the present invention do not limit the protection scope of the present invention. The implementation manners of the present invention are not limited to this. All kinds of modifications, substitutions, or changes made to the above structure of the present invention according to the above content of the present invention, in accordance with the common general knowledge and conventional means in the art, without departing from the above basic technical idea of the present invention, shall fall within the protection scope of the present invention.

Claims

1. A treatment device for safely and material-savingly treating ammonia-nitrogen-containing waste liquid, characterized in that: It includes a chlorine generator, an ammonia removal reaction tank, an inorganic alkali feeding device, a temporary storage tank and a drainage device; wherein, The chlorine generator is an electrolytic device that produces chlorine through an electrolytic process, which includes an electrolytic cell, in which a separator is provided to separate the electrolytic cell into an anode cell area and a cathode cell area; The ammonia removal reaction tank is a corrosion-resistant reaction tank, equipped with a detection device, and is used to treat waste liquid containing ammonia nitrogen; The inorganic alkali feeding device is used to control the feeding of inorganic alkali solid and / or its aqueous solution into the ammonia removal reaction tank or temporary storage tank to participate in the reaction according to the result measured by the detection device; The temporary storage tank is used to store chemical raw materials and / or is used as a chemical reaction tank; The drainage device is used to drain the chlorine produced by the chlorine generator to the ammonia removal reaction tank and / or the temporary storage tank to participate in the chemical reaction.

2. The treatment device for safely and material-savingly treating ammonia-nitrogen-containing waste liquid according to claim 1, characterized in that: The electrolytic cell separator of the chlorine generator is used to effectively separate the gas precipitated on the cathode and anode in the electrolytic cell, and is specifically at least one of a cation exchange membrane, anion exchange membrane, bipolar membrane, reverse osmosis membrane, filter cloth, and an electrolytic diaphragm without ion selectivity.

3. The treatment device for safely and material-savingly treating ammonia-nitrogen-containing waste liquid according to claim 1, characterized in that: The chlorine generator also includes a gas collector, which corresponds to the cathode tank area and the anode tank area of ​​the electrolytic cell respectively and is connected to the drainage device, so that the gas precipitated by the cathode and the anode in the electrolytic cell in the electrochemical reaction can be safely collected and processed separately, or the gas precipitated by the anode electrolyte reaction in the electrolytic cell can be collected and processed separately, that is, the prepared chlorine can be collected and used with high purity.

4. The treatment device for safely and material-savingly treating ammonia-nitrogen-containing waste liquid according to claim 3, characterized in that: The gas collectors of the chlorine generator are an anode gas collecting cover and a cathode gas collecting cover, which respectively cover the anode tank area and the cathode tank area of ​​the chlorine generator, so that different gases precipitated from the cathode and anode electrolytes can be collected separately for separate treatment.

5. The treatment device for safely and material-savingly treating ammonia-nitrogen-containing waste liquid according to claim 1, characterized in that: The drainage device can be a combination of a drainage pipeline and a chlorine gas delivery pump, or a combination of a drainage pipeline and a venturi ejector.

6. The treatment device for safely and material-savingly treating ammonia-nitrogen-containing waste liquid according to claim 1, characterized in that: The detection device of the ammonia removal reaction tank includes a pH meter and / or a redox potentiometer, wherein the pH meter is used to detect the controlled dosage of inorganic alkali and / or ammonia nitrogen-containing waste liquid, and the redox potentiometer is used to detect the controlled dosage of oxidant.

7. The treatment device for safely and material-savingly treating ammonia-nitrogen-containing waste liquid according to claim 1, characterized in that: At least one of the following detection sensors is added to the ammonia removal reaction tank and / or temporary storage tank: at least one of a hydrometer, an acidity meter, a photoelectric colorimeter, a liquid level meter, a thermometer, an electrolysis power supply output current regulator and a timer. When a detection sensor is added to the temporary storage tank, the selection range of the detection sensor also includes a pH meter and a redox potentiometer.

8. The treatment device for safely and material-savingly treating ammonia-nitrogen-containing waste liquid according to claim 1, characterized in that: At least one chlorine gas detector and / or at least one hydrogen gas detector are provided, and the chlorine gas detector and the hydrogen gas detector are installed in the workshop where the processing device is located.

9. The treatment device for safely and material-savingly treating ammonia-nitrogen-containing waste liquid according to claim 1, characterized in that: An automatic detection and feeding controller is added to realize the process automation of waste liquid treatment and the safety interlock of the chlorine generator.

10. The treatment device for safely and material-savingly treating ammonia-nitrogen-containing waste liquid according to claim 1, characterized in that: A hot and cold temperature exchanger is added to control the temperature of the ammonia nitrogen-containing waste liquid and / or electrolyte and / or inorganic alkaline solution in the treatment process of the treatment device, and utilize temperature control to promote chemical reactions and make production safe, efficient and energy-saving.

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