CN111926178B - Device and method for cracking organic matters in zinc sulfate solution - Google Patents
Device and method for cracking organic matters in zinc sulfate solution Download PDFInfo
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- CN111926178B CN111926178B CN202010801731.1A CN202010801731A CN111926178B CN 111926178 B CN111926178 B CN 111926178B CN 202010801731 A CN202010801731 A CN 202010801731A CN 111926178 B CN111926178 B CN 111926178B
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Abstract
The invention discloses a device and a method for cracking organic matters in a zinc sulfate solution, and the device comprises a water inlet tank, a water inlet pump, a multistage reaction kettle device, an ozone generator, a tail gas treatment device and a liquid storage tank, wherein the water inlet tank is connected with a zinc sulfate stock solution water inlet of a first-stage reaction kettle device through a liquid pipeline through the water inlet pump, the multistage reaction kettle device is arranged in a stepped manner, and an ultrasonic generator and a stirring device are arranged in the multistage reaction kettle device. The method comprises the following steps: zinc sulfate solution containing organic matters is sequentially subjected to stepwise cracking removal through a multistage reaction kettle device under the action of ultrasonic waves and ozone. The invention can effectively crack the organic matters in the zinc sulfate solution through the oxidation of ultrasonic waves and ozone under the condition of not changing the conventional zinc hydrometallurgy process, thereby achieving the purposes of improving the quality of zinc products and improving the electric efficiency. Meanwhile, the method has low cost and simple operation, and can effectively remove the organic matters in the zinc sulfate solution in a short time.
Description
Technical Field
The invention belongs to the field of nonferrous metallurgy, and particularly relates to a device and a method for cracking organic matters in a zinc sulfate solution.
Background
The zinc sulfate solution is generally used as a raw material for wet-method zinc smelting, and the wet-method zinc metallurgical process comprises three steps of zinc calcine leaching, leachate purification and electrolytic deposition. In the zinc hydrometallurgy process, some organic pollutants often float in the used zinc sulfate raw material, which seriously affects the zinc electrodeposition process and causes the consequence of low electric efficiency. With the increasing social demand for zinc ingots, how to effectively remove organic matters in a zinc sulfate solution to improve the quality of zinc products and improve the electric efficiency becomes a technical problem to be solved urgently.
The existing method for removing organic matters in zinc sulfate solution mainly comprises the following steps: physical sedimentation, activated carbon adsorption, a liquid membrane filtration method and an oxidation method, wherein the oxidation method has the advantages of low cost, simple process and strong environmental protection. The ozone oxidation method is applied to the invention as a typical representative of the oxidation method, but because ozone has the limitations of low solubility, poor ozone utilization rate, long reaction time and the like, the invention provides an ultrasonic wave reinforced oxidation process, thereby achieving the aim of comprehensively improving the ozone oxidation capability.
The existing method for removing organic matters in zinc sulfate solution mainly comprises the following steps: physical sedimentation, activated carbon adsorption, a liquid membrane filtration method and an oxidation method, wherein the oxidation method has the advantages of low cost, simple process and strong environmental protection. For example, in Chinese patent, a method for removing arsenic, iron and organic matters from a zinc sulfate solution after germanium precipitation of a zinc oxide smoke leachate is disclosed as 201911178781.2, and the application date is 2019.11.27. Meanwhile, the required temperature in the reaction kettle is too high, and the requirements on equipment are extremely strict. Finally, the pH value is narrow in effective range and difficult to regulate, and the problem cannot be ignored. The ozone oxidation method is a typical representative of the oxidation method, and is also involved in a process for removing organic matters in the zinc sulfate solution, but due to the limitations of low solubility and the like of ozone, the defects of poor ozone utilization rate, complex structure, long reaction time and the like in the treatment of the zinc sulfate solution in the prior art are caused.
Disclosure of Invention
In view of the above problems, a first object of the present invention is to provide an apparatus for cracking organic matters in a zinc sulfate solution, and another object of the present invention is to provide a method for cracking organic matters in a zinc sulfate solution.
The first purpose of the invention is realized in such a way that the device for cracking the organic matters in the zinc sulfate solution comprises a water inlet pool, a water inlet pump, a multi-stage reaction kettle device, an ozone generator, a tail gas treatment device and a liquid storage pool, wherein the water inlet pool is connected with a zinc sulfate stock solution water inlet of the first-stage reaction kettle device through the water inlet pump through a liquid pipeline; an ultrasonic generator and a stirring device are arranged in the multistage reaction kettle device, and a liquid outlet of the reaction of the final stage reaction kettle device is connected with a liquid storage tank through a liquid pipeline.
The ozone method for cracking the organic matters in the zinc sulfate solution comprises the following steps:
(1) adding the zinc sulfate solution containing organic matters into a first-stage reaction kettle device from a zinc sulfate solution water inlet, simultaneously introducing ozone into the first-stage reaction kettle device, completing preliminary organic matter oxidative cracking under the action of ultrasonic waves and stirring, and controlling the reaction time for 5-30 minutes to obtain a first-stage reaction liquid.
(2) And adding the first-stage reaction liquid into a second-stage reaction kettle device through a water inlet, introducing ozone into the second-stage reaction kettle device, performing further organic matter oxidative cracking under the action of ultrasonic waves and stirring, and controlling the reaction time for 5-30 minutes to obtain a second-stage reaction liquid.
(3) And adding the second-stage reaction liquid into a third-stage reaction kettle device, introducing ozone into the third-stage reaction kettle device, completely oxidizing and cracking residual organic matters under the action of ultrasonic waves and stirring, and controlling the reaction time for 5-30 minutes to obtain a target solution.
(4) After the reaction is finished, the target solution is discharged from a zinc sulfate solution water outlet, and redundant ozone and tail gas enter a tail gas treatment device for treatment.
The invention has the beneficial effects that: according to the invention, under the condition that the existing zinc hydrometallurgy flow is not changed, the organic matters in the zinc sulfate solution are effectively cracked through the oxidation action of ultrasonic waves and ozone, so that the purposes of improving the quality of zinc products and improving the electric efficiency are achieved; meanwhile, the method has low cost and simple operation, and can effectively remove the organic matters in the zinc sulfate solution in a short time;
the multistage reaction kettles in the cracking device are arranged in a stepped mode, the reaction time and the ultrasonic power are gradually reduced along with the number of the reaction stages, the first reaction liquid in the first-stage reaction kettle device enters the second reaction kettle device along the liquid pipeline for further cracking reaction, the obtained second reaction liquid enters the third reaction kettle device for further cracking reaction … … of residual organic matters until the organic matters are cracked and removed completely. The method has high organic matter cracking efficiency, can crack the organic matter completely, can effectively improve the reaction contact area by the gradient cracking of the organic matter by the multistage reaction kettle device, improves the efficiency, reduces the reaction time and the ultrasonic power used by each reaction kettle device along with the reaction stage number, and has lower total energy consumption than the complete energy consumption of the reaction in the first-stage reaction kettle device;
in addition, the invention overcomes the problem that ozone has low solubility and is not easy to react with the solution through the enhanced cracking function and the stirring function of the ultrasonic wave in the reaction kettle device, and is beneficial to the full reaction of the ozone and the organic matters in the zinc sulfate solution.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the apparatus for cracking organic substances in zinc sulfate solution according to the present invention;
1-water inlet tank, 2-water inlet pump, 3-multistage reaction kettle device, 31-first-stage reaction kettle device, 32-second-stage reaction kettle device, 33-third-stage reaction kettle device, 311-ultrasonic generator, 312-stirring device, 4-ozone generator, 5-first gas pipeline, 6-gas flow valve, 7-liquid flow control valve, 8-tail gas back pressure valve, 9-tail gas treatment device, 10-second gas pipeline and 70-liquid storage tank.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to be limiting in any way, and any modifications or alterations based on the teachings of the present invention are intended to fall within the scope of the present invention.
The invention relates to a device for cracking organic matters in a zinc sulfate solution, which comprises a water inlet tank 1, a water inlet pump 2, a multistage reaction kettle device 3, an ozone generator 4, a tail gas treatment device 9 and a liquid storage tank 70, wherein the water inlet tank 1 is connected with a zinc sulfate stock solution water inlet of a first-stage reaction kettle device 31 through the water inlet pump 2 through a liquid pipeline, the multistage reaction kettle devices 3 are arranged in a ladder way, a liquid outlet and a liquid inlet of adjacent reaction kettle devices are connected through the liquid pipeline, the ozone generator 4 is connected with a gas inlet of each stage of reaction kettle through a first gas pipeline 5, and the tail gas treatment device 9 is connected with a gas outlet of each stage of reaction kettle through a second gas pipeline 10; the multistage reaction kettle device 3 is provided with an ultrasonic generator 311 and a stirring device 312, and a liquid outlet of the reaction of the final stage reaction kettle device is connected with the liquid storage tank 70 through a liquid pipeline.
The air inlet of the ozone is arranged at the lower part or the bottom of the multistage reaction kettle device 3, so that the ozone is better dissolved in the solution for oxidation; a gas flow valve 6 is arranged between the ozone generator 4 and a first gas pipeline 5 of the multistage reaction kettle device 3 and is used for controlling the speed of ozone flowing into the multistage reaction device 3 so as to control the pressure in the multistage reaction kettle device 3; and a tail gas backpressure valve 8 is arranged between the tail gas treatment device 9 and a second gas pipeline 10 of the multistage reaction kettle device to control the speed and flow of tail gas emission and ensure the safety of exhaust.
And the liquid pipeline is provided with a liquid flow control valve 7 for controlling the flow rate of the zinc sulfate solution.
The stirring device 312 is a stirring paddle.
The liquid inlets are respectively provided with a filtering structure which is a filter or an ultrafiltration membrane and is used for filtering solid particulate matters in the zinc sulfate solution.
The multistage reaction kettle comprises a first-stage reaction kettle device 31, a second-stage reaction kettle device 32 and a third-stage reaction kettle device 33.
The invention relates to a method for cracking organic matters in a zinc sulfate solution, which specifically comprises the following steps:
(1) adding the zinc sulfate solution containing the organic matters into the first-stage reaction kettle device 31 from a zinc sulfate solution water inlet, simultaneously introducing ozone into the first-stage reaction kettle device 31, completing preliminary organic matter oxidative cracking under the action of ultrasonic waves and stirring, and controlling the reaction time for 5-30 minutes to obtain a first-stage reaction liquid.
(2) And adding the primary reaction liquid into a secondary reaction kettle device 32 through a water inlet, introducing ozone into the secondary reaction kettle device, performing further organic matter oxidative cracking under the action of ultrasonic waves and stirring, and controlling the reaction time for 5-30 minutes to obtain a secondary reaction liquid.
(3) And adding the second-stage reaction liquid into a third-stage reaction kettle device 33, introducing ozone into the third-stage reaction kettle device 33, completely oxidizing and cracking residual organic matters under the action of ultrasonic waves and stirring, and controlling the reaction time for 5-30 minutes to obtain a target solution.
(4) After the reaction is finished, the target solution is discharged from a zinc sulfate solution outlet, and redundant ozone and tail gas enter a tail gas treatment device 9 for treatment.
In the step 1, the pH value of the zinc sulfate solution is as follows: 2.0-6.0, wherein the concentration of organic matters in the zinc sulfate solution is as follows: 200-900 mg/L.
In the step 3, the concentration range of the used ozone is as follows: 70-100 percent.
Reaction time in step 3 < reaction time in step 2 < reaction time in step 1.
The stirring rate is 100-800 rpm.
In step 1, the power range of the ultrasonic wave is as follows: 1-1.5 kW.
In the step 2, the power range of the ultrasonic wave is as follows: 0.5-1 kW.
In step 3, the power range of the ultrasonic wave is as follows: 0.1-0.5 kW.
The present invention is further illustrated by the following examples.
Example 1
A method for cracking organic matters in a zinc sulfate solution specifically comprises the following steps: zinc sulfate solution with the organic matter concentration of 200mg/L, PH value of 2.0 is filtered by a filter from a zinc sulfate solution water inlet and then added into a first-stage reaction kettle device 31, ozone with the concentration of 70% is introduced into the first-stage reaction kettle device 31, first-stage organic matter oxidative cracking is completed under the action of ultrasonic waves with the power of 1kW and stirring with the stirring speed of 100 revolutions per minute, and the reaction time is controlled for 10 minutes. The solution completely reacted in the first-stage reaction kettle device 31 is added into the second-stage reaction kettle device 32 through a water inlet, meanwhile, ozone with the concentration of 70% is introduced into the second-stage reaction kettle device 32, the second-stage organic matter is oxidized and cracked under the action of ultrasonic waves with the power of 0.5kW and stirring with the stirring speed within the range of 100 revolutions per minute, and the reaction time is controlled for 5 minutes. And adding the completely reacted solution in the second-stage reaction kettle device 32 into the third-stage reaction kettle device 33 through a water inlet, introducing 70% ozone into the third-stage reaction kettle device 33, completing the third-stage organic matter oxidative cracking under the action of ultrasonic waves with the power range of 0.1kW and stirring with the stirring speed range of 100 revolutions per minute, and controlling the reaction time for 5 minutes. After the reaction is finished, the zinc sulfate solution with the completely cracked organic matter and the redundant ozone are discharged from a zinc sulfate solution outlet and a tail gas discharge port respectively, the zinc sulfate solution with the completely cracked organic matter enters the liquid storage tank 70, and the ozone directly enters the tail gas treatment device 9.
Example 2
A method for cracking organic matters in a zinc sulfate solution specifically comprises the following steps: zinc sulfate solution with the organic matter concentration of 300mg/L, PH value of 3.0 is filtered by a filter from a zinc sulfate solution water inlet and then added into a first-stage reaction kettle device 31, ozone with the concentration of 70% is introduced into the first-stage reaction kettle device 31, first-stage organic matter oxidative cracking is completed under the action of ultrasonic waves with the power of 1.1 kW and stirring with the stirring speed of 200 revolutions per minute, and the reaction time is controlled for 10 minutes. The solution completely reacted in the first-stage reaction kettle device 31 is added into the second-stage reaction kettle device 32 through a water inlet, meanwhile, ozone with the concentration of 70% is introduced into the second-stage reaction kettle device 32, the second-stage organic matter is oxidized and cracked under the action of ultrasonic waves with the power range of 0.6 kW and stirring with the stirring speed range of 200 revolutions per minute, and the reaction time is controlled for 17 minutes. And adding the completely reacted solution in the second-stage reaction kettle device 32 into the third-stage reaction kettle device 33 through a water inlet, introducing 70% ozone into the third-stage reaction kettle device 33, completing the oxidation and cracking of the third-stage organic matters under the action of ultrasonic waves with the power of 0.2 kW and stirring with the stirring speed of 200 rpm, and controlling the reaction time for 12 minutes. After the reaction is finished, the solution and the redundant ozone are discharged from a zinc sulfate solution outlet and a tail gas discharge port respectively, the zinc sulfate solution with completely cracked organic matters enters the liquid storage tank 70, and the ozone directly enters the tail gas treatment device 9.
Example 3
A method for cracking organic matters in a zinc sulfate solution specifically comprises the following steps: zinc sulfate solution with the organic matter concentration of 400mg/L, PH value of 4.0 is filtered by a filter from a zinc sulfate solution water inlet and then added into a first-stage reaction kettle device 31, ozone with the concentration range of 80% is introduced into the first-stage reaction kettle device 31, first-stage organic matter oxidative cracking is completed under the action of ultrasonic waves with the power range of 1.2kW and stirring with the stirring speed range of 300 revolutions per minute, and the reaction time is controlled for 15 minutes. The solution completely reacted in the first-stage reaction kettle device 31 is added into the second-stage reaction kettle device 32 through a water inlet, ozone with the concentration range of 80% is introduced into the second-stage reaction kettle device 32, the second-stage organic matter is oxidized and cracked under the action of ultrasonic waves with the power range of 0.7kW and stirring with the stirring speed range of 300 revolutions per minute, and the reaction time is controlled for 13 minutes. The solution completely reacted in the second-stage reaction kettle device 32 is added into the third-stage reaction kettle device 33 through a water inlet, ozone with the concentration range of 80% is introduced into the third-stage reaction kettle device 33, the third-stage organic matter is oxidized and cracked under the action of ultrasonic waves with the power range of 0.3kW and stirring with the stirring speed range of 300 revolutions per minute, and the reaction time is controlled for 10 minutes. After the reaction is finished, the solution and the redundant ozone are discharged from a zinc sulfate solution outlet and a tail gas discharge port respectively, the zinc sulfate solution with completely cracked organic matters enters the liquid storage tank 70, and the ozone directly enters the tail gas treatment device 12.
Example 4
A method for cracking organic matters in a zinc sulfate solution specifically comprises the following steps: zinc sulfate solution with the organic matter concentration of 500mg/L, PH value of 5.0 is filtered by a filter from a zinc sulfate solution water inlet and then added into a first-stage reaction kettle device 31, ozone with the concentration of 80% is introduced into the first-stage reaction kettle device 31, first-stage organic matter oxidative cracking is completed under the action of ultrasonic waves with the power range of 1.3kW and stirring with the stirring speed range of 400 revolutions per minute, and the reaction time is controlled for 20 minutes. The solution completely reacted in the first-stage reaction kettle device 31 is added into the second-stage reaction kettle device 32 through a water inlet, ozone with the concentration of 80% is introduced into the second-stage reaction kettle device 32, the second-stage organic matter is oxidized and cracked under the action of ultrasonic waves with the power range of 0.8kW and stirring with the stirring speed range of 400 rpm, and the reaction time is controlled for 12 minutes. And adding the completely reacted solution in the second-stage reaction kettle device 32 into the third-stage reaction kettle device 33 through a water inlet, simultaneously introducing ozone with the concentration range of 80% into the third-stage reaction kettle device 33, completing the oxidative cracking of the third-stage organic matters under the action of ultrasonic waves with the power range of 0.4kW and stirring with the stirring speed range of 400 rpm, and controlling the reaction time for 7 minutes. After the reaction is finished, the solution and the redundant ozone are discharged from a zinc sulfate solution outlet and a tail gas discharge port respectively, the zinc sulfate solution with completely cracked organic matters enters the liquid storage tank 70, and the ozone directly enters the tail gas treatment device 9.
Example 5
A method for cracking organic matters in a zinc sulfate solution specifically comprises the following steps: zinc sulfate solution containing 800mg/L organic matter and having a pH value of 5.0 is filtered by a filter from a zinc sulfate solution water inlet and then added into a first-stage reaction kettle device 31, ozone with a concentration range of 90% is introduced into the first-stage reaction kettle device 31, first-stage organic matter oxidative cracking is completed under the action of ultrasonic waves with a power range of 1.4kW and stirring with a stirring speed range of 700 revolutions per minute, and the reaction time is controlled for 25 minutes. The solution completely reacted in the first-stage reaction kettle device 31 is added into the second-stage reaction kettle device 32 through a water inlet, meanwhile, ozone with the concentration range of 90% is introduced into the second-stage reaction kettle device 32, the second-stage organic matter is oxidized and cracked under the action of ultrasonic waves with the power range of 0.9kW and stirring with the stirring speed range of 700 revolutions per minute, and the reaction time is controlled for 20 minutes. The solution completely reacted in the second-stage reaction kettle device 32 is added into the third-stage reaction kettle device 33 through a water inlet, meanwhile, ozone with the concentration range of 90% is introduced into the third-stage reaction kettle device 33, the third-stage organic matter is oxidized and cracked under the action of ultrasonic waves with the power range of 0.5kW and stirring with the stirring speed range of 700 rpm, and the reaction time is controlled for 10 minutes. After the reaction is finished, the solution and the redundant ozone are discharged from a zinc sulfate solution outlet and a tail gas discharge port respectively, the zinc sulfate solution with completely cracked organic matters enters the liquid storage tank 70, and the ozone directly enters the tail gas treatment device 9.
Example 6
A method for cracking organic matters in a zinc sulfate solution specifically comprises the following steps: zinc sulfate solution containing 900mg/L organic matter and having a pH value of 6.0 is filtered from a zinc sulfate solution water inlet through a filter and then added into a first-stage reaction kettle device 31, ozone with the concentration of 100% is introduced into the first-stage reaction kettle device 31, first-stage organic matter oxidative cracking is completed under the action of ultrasonic waves with the power range of 1.5kW and stirring with the stirring speed range of 800 revolutions per minute, and the reaction time is controlled for 30 minutes. The solution completely reacted in the first-stage reaction kettle device 31 is added into the second-stage reaction kettle device 32 through a water inlet, meanwhile, ozone with the concentration range of 100% is introduced into the second-stage reaction kettle device 32, the second-stage organic matter is oxidized and cracked under the action of ultrasonic waves with the power range of 1kW and stirring with the stirring speed range of 800 rpm, and the reaction time is controlled for 15 minutes. The solution completely reacted in the second-stage reaction kettle device 32 is added into the third-stage reaction kettle device 33 through a water inlet, meanwhile, ozone with the concentration of 100% is introduced into the third-stage reaction kettle device 33, the third-stage organic matter is oxidized and cracked under the action of ultrasonic waves with the power range of 0.5kW and stirring with the stirring speed range of 800 rpm, and the reaction time is controlled for 10 minutes. After the reaction is finished, the solution and the redundant ozone are discharged from a zinc sulfate solution outlet and a tail gas discharge port respectively, the zinc sulfate solution with completely cracked organic matters enters the liquid storage tank 70, and the ozone directly enters the tail gas treatment device 9.
In examples 1 to 6, the total organic matter pyrolysis removal reaction time was not more than 55 minutes, which indicates that the method can effectively remove the organic matters in the zinc sulfate solution in a short time.
Claims (6)
1. The method for cracking the organic matters in the zinc sulfate solution is characterized in that a multistage reaction kettle is arranged in a stepped manner, the reaction time and the ultrasonic power are gradually reduced along with the reaction stage number, and the total energy consumption is lower than the energy consumption of complete reaction in a first-stage reaction kettle device; the total organic matter cracking and removing reaction time is not more than 55 minutes, and the method is realized by the following steps:
(1) filtering a zinc sulfate solution with the organic matter concentration of 200mg/L, PH value of 2.0 from a zinc sulfate solution water inlet through a filter, adding the zinc sulfate solution into a first-stage reaction kettle device (31), introducing ozone with the concentration of 70% into the first-stage reaction kettle device (31), completing first-stage organic matter oxidative cracking under the action of ultrasonic waves with the power of 1kW and stirring with the stirring speed of 100 revolutions per minute, and controlling the reaction time for 10 minutes;
(2) adding a completely reacted solution in the first-stage reaction kettle device (31) into the second-stage reaction kettle device (32) through a water inlet, simultaneously introducing 70% ozone into the second-stage reaction kettle device (32), completing the oxidative cracking of a second-stage organic matter under the action of ultrasonic waves with the power of 0.5kW and stirring with the stirring speed within the range of 100 revolutions per minute, and controlling the reaction time for 5 minutes;
(3) adding a completely reacted solution in the second-stage reaction kettle device (32) into the third-stage reaction kettle device (33) through a water inlet, simultaneously introducing 70% ozone into the third-stage reaction kettle device (33), completing third-stage organic matter oxidative cracking under the action of ultrasonic waves with the power range of 0.1kW and stirring with the stirring speed range of 100 revolutions per minute, and controlling the reaction time for 5 minutes;
(4) after the reaction is finished, the zinc sulfate solution with the completely cracked organic matter and the redundant ozone are discharged from a zinc sulfate solution outlet and a tail gas discharge port respectively, the zinc sulfate solution with the completely cracked organic matter enters a liquid storage tank, and the ozone directly enters a tail gas treatment device.
2. The method for cracking the organic matters in the zinc sulfate solution is characterized in that a multistage reaction kettle is arranged in a stepped manner, the reaction time and the ultrasonic power are gradually reduced along with the reaction stage number, and the total energy consumption is lower than the energy consumption of complete reaction in a first-stage reaction kettle device; the total organic matter cracking and removing reaction time is not more than 55 minutes, and the method is realized by the following steps:
(1) filtering a zinc sulfate solution with an organic matter concentration of 400mg/L, PH value of 4.0 from a zinc sulfate solution water inlet through a filter, adding the zinc sulfate solution into a first-stage reaction kettle device (31), introducing ozone with a concentration range of 80% into the first-stage reaction kettle device (31), completing first-stage organic matter oxidative cracking under the action of ultrasonic waves with a power range of 1.2kW and stirring with a stirring speed range of 300 revolutions per minute, and controlling the reaction time for 15 minutes;
(2) adding a completely reacted solution in the first-stage reaction kettle device (31) into the second-stage reaction kettle device (32) through a water inlet, simultaneously introducing ozone with the concentration range of 80% into the second-stage reaction kettle device (32), completing the oxidative cracking of second-stage organic matters under the action of ultrasonic waves with the power range of 0.7kW and stirring with the stirring speed range of 300 r/min, and controlling the reaction time for 13 min;
(3) adding a completely reacted solution in the second-stage reaction kettle device (32) into the third-stage reaction kettle device (33) through a water inlet, simultaneously introducing ozone with the concentration range of 80% into the third-stage reaction kettle device (33), completing third-stage organic matter oxidative cracking under the action of ultrasonic waves with the power range of 0.3kW and stirring with the stirring speed range of 300 revolutions per minute, and controlling the reaction time for 10 minutes;
(4) after the reaction is finished, the solution and the redundant ozone are discharged from a zinc sulfate solution outlet and a tail gas discharge port respectively, the zinc sulfate solution with completely cracked organic matters enters a liquid storage tank, and the ozone directly enters a tail gas treatment device.
3. The method for cracking the organic matters in the zinc sulfate solution is characterized in that a multistage reaction kettle is arranged in a stepped manner, the reaction time and the ultrasonic power are gradually reduced along with the reaction stages, and the total energy consumption is lower than the energy consumption for complete reaction in a first-stage reaction kettle device; the total organic matter cracking and removing reaction time is not more than 55 minutes, and the method is realized by the following steps:
(1) filtering a zinc sulfate solution with an organic matter concentration of 400mg/L, PH value of 4.0 from a zinc sulfate solution water inlet through a filter, adding the zinc sulfate solution into a first-stage reaction kettle device (31), introducing ozone with a concentration range of 80% into the first-stage reaction kettle device (31), completing first-stage organic matter oxidative cracking under the action of ultrasonic waves with a power range of 1.2kW and stirring with a stirring speed range of 300 revolutions per minute, and controlling the reaction time for 15 minutes;
(2) adding a completely reacted solution in the first-stage reaction kettle device (31) into the second-stage reaction kettle device (32) through a water inlet, simultaneously introducing ozone with the concentration range of 80% into the second-stage reaction kettle device (32), completing the oxidative cracking of a second-stage organic matter under the action of ultrasonic waves with the power range of 0.7kW and stirring with the stirring speed range of 300 revolutions per minute, and controlling the reaction time for 13 minutes;
(3) adding a completely reacted solution in the second-stage reaction kettle device (32) into the third-stage reaction kettle device (33) through a water inlet, simultaneously introducing ozone with the concentration range of 80% into the third-stage reaction kettle device (33), completing third-stage organic matter oxidative cracking under the action of ultrasonic waves with the power range of 0.3kW and stirring with the stirring speed range of 300 revolutions per minute, and controlling the reaction time for 10 minutes;
(4) after the reaction is finished, the solution and the redundant ozone are discharged from a zinc sulfate solution outlet and a tail gas discharge port respectively, the zinc sulfate solution with completely cracked organic matters enters a liquid storage tank, and the ozone directly enters a tail gas treatment device.
4. The method for cracking the organic matters in the zinc sulfate solution is characterized in that a multistage reaction kettle is arranged in a stepped manner, the reaction time and the ultrasonic power are gradually reduced along with the reaction stages, and the total energy consumption is lower than the energy consumption for complete reaction in a first-stage reaction kettle device; the total organic matter cracking and removing reaction time is not more than 55 minutes, and the method is realized by the following steps:
(1) filtering a zinc sulfate solution with an organic matter concentration of 500mg/L, PH value of 5.0 from a zinc sulfate solution water inlet through a filter, adding the zinc sulfate solution into a first-stage reaction kettle device (31), introducing ozone with a concentration of 80% into the first-stage reaction kettle device (31), completing first-stage organic matter oxidative cracking under the action of ultrasonic waves with a power range of 1.3kW and stirring with a stirring speed range of 400 revolutions per minute, and controlling the reaction time for 20 minutes;
(2) adding a completely reacted solution in the first-stage reaction kettle device (31) into the second-stage reaction kettle device (32) through a water inlet, simultaneously introducing 80% ozone into the second-stage reaction kettle device (32), completing the oxidative cracking of a second-stage organic matter under the action of ultrasonic waves with a power range of 0.8kW and stirring with a stirring speed range of 400 rpm, and controlling the reaction time to be 12 minutes;
(3) adding a completely reacted solution in the second-stage reaction kettle device (32) into the third-stage reaction kettle device (33) through a water inlet, simultaneously introducing ozone with the concentration range of 80% into the third-stage reaction kettle device (33), completing third-stage organic matter oxidative cracking under the action of ultrasonic waves with the power range of 0.4kW and stirring with the stirring speed range of 400 rpm, and controlling the reaction time for 7 minutes;
(4) after the reaction is finished, the solution and the redundant ozone are discharged from a zinc sulfate solution outlet and a tail gas discharge port respectively, the zinc sulfate solution with the completely cracked organic matters enters a liquid storage tank, and the ozone directly enters a tail gas treatment device.
5. The method for cracking the organic matters in the zinc sulfate solution is characterized in that a multistage reaction kettle is arranged in a stepped manner, the reaction time and the ultrasonic power are gradually reduced along with the reaction stage number, and the total energy consumption is lower than the energy consumption of complete reaction in a first-stage reaction kettle device; the total organic matter cracking and removing reaction time is not more than 55 minutes, and the method is realized by the following steps:
(1) filtering a zinc sulfate solution containing 800mg/L of organic matters and having a pH value of 5.0 from a zinc sulfate solution water inlet through a filter, adding the zinc sulfate solution into a first-stage reaction kettle device (31), introducing ozone with the concentration range of 90% into the first-stage reaction kettle device (31), completing first-stage organic matter oxidative cracking under the action of ultrasonic waves with the power range of 1.4kW and stirring with the stirring speed range of 700 revolutions per minute, and controlling the reaction time for 25 minutes;
(2) adding a completely reacted solution in the first-stage reaction kettle device (31) into the second-stage reaction kettle device (32) through a water inlet, simultaneously introducing 90% ozone into the second-stage reaction kettle device (32), completing the oxidative cracking of a second-stage organic matter under the action of ultrasonic waves with a power range of 0.9kW and stirring with a stirring speed range of 700 revolutions per minute, and controlling the reaction time for 20 minutes;
(3) adding a completely reacted solution in the second-stage reaction kettle device (32) into the third-stage reaction kettle device (33) through a water inlet, simultaneously introducing 90% ozone into the third-stage reaction kettle device (33), completing third-stage organic matter oxidative cracking under the action of ultrasonic waves with a power range of 0.5kW and stirring with a stirring speed range of 700 revolutions per minute, and controlling the reaction time for 10 minutes;
(4) after the reaction is finished, the solution and the redundant ozone are discharged from a zinc sulfate solution outlet and a tail gas discharge port respectively, the zinc sulfate solution with completely cracked organic matters enters a liquid storage tank, and the ozone directly enters a tail gas treatment device.
6. A method for cracking organic matters in zinc sulfate solution is characterized in that a multistage reaction kettle is arranged in a step mode, the reaction time and the ultrasonic power are gradually reduced along with the reaction stage number, and the total energy consumption is lower than the energy consumption of complete reaction in a first-stage reaction kettle device; the total organic matter cracking and removing reaction time is not more than 55 minutes, and the method is realized by the following steps:
(1) filtering a zinc sulfate solution containing 900mg/L of organic matters and having a pH value of 6.0 from a zinc sulfate solution water inlet through a filter, adding the zinc sulfate solution into a first-stage reaction kettle device (31), introducing 100% ozone into the first-stage reaction kettle device (31), completing first-stage organic matter oxidative cracking under the action of ultrasonic waves with a power range of 1.5kW and stirring with a stirring speed range of 800 revolutions per minute, and controlling the reaction time for 30 minutes;
(2) adding a completely reacted solution in the first-stage reaction kettle device (31) into the second-stage reaction kettle device (32) through a water inlet, simultaneously introducing ozone with the concentration range of 100% into the second-stage reaction kettle device (32), completing the oxidative cracking of a second-stage organic matter under the action of ultrasonic waves with the power range of 1kW and stirring with the stirring speed range of 800 rpm, and controlling the reaction time for 15 minutes;
(3) adding a completely reacted solution in the second-stage reaction kettle device (32) into the third-stage reaction kettle device (33) through a water inlet, simultaneously introducing 100% ozone into the third-stage reaction kettle device (33), completing third-stage organic matter oxidative cracking under the action of ultrasonic waves with a power range of 0.5kW and stirring with a stirring speed range of 800 rpm, and controlling the reaction time for 10 minutes;
(4) after the reaction is finished, the solution and the redundant ozone are discharged from a zinc sulfate solution outlet and a tail gas discharge port respectively, the zinc sulfate solution with completely cracked organic matters enters a liquid storage tank, and the ozone directly enters a tail gas treatment device.
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