CN111187902B - Aluminum matrix mercury catalysis technology dissolving system - Google Patents
Aluminum matrix mercury catalysis technology dissolving system Download PDFInfo
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- CN111187902B CN111187902B CN202010022663.9A CN202010022663A CN111187902B CN 111187902 B CN111187902 B CN 111187902B CN 202010022663 A CN202010022663 A CN 202010022663A CN 111187902 B CN111187902 B CN 111187902B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/005—Preliminary treatment of scrap
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B60/00—Obtaining metals of atomic number 87 or higher, i.e. radioactive metals
- C22B60/02—Obtaining thorium, uranium, or other actinides
- C22B60/0295—Obtaining thorium, uranium, or other actinides obtaining other actinides except plutonium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22B60/00—Obtaining metals of atomic number 87 or higher, i.e. radioactive metals
- C22B60/02—Obtaining thorium, uranium, or other actinides
- C22B60/04—Obtaining plutonium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
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Abstract
The invention belongs to the technical field of spent fuel post-treatment, and particularly relates to an aluminum matrix mercury catalysis technology dissolving system which is used for dissolving an aluminum matrix ring of a neptunium target by utilizing mercury catalysis dissolving reaction, and comprises a strong acid resistant and high temperature resistant material feeding chute (18) and a dissolving tank (1) for performing the mercury catalysis dissolving reaction, wherein a temperature control device for adjusting the temperature of the dissolving tank (1) is arranged on the periphery of the dissolving tank (1); a dropwise adding pipe (22) for adding nitric acid, a feeding pipe (20) for adding a mercuric nitrate solution, a bubbling pipe (23) for introducing nitrogen into the solution in the dissolving tank (1), and a discharging pipe (21) for discharging the solution in which the aluminum matrix ring is dissolved are further arranged on the dissolving tank (1) in a penetrating manner; the top of the dissolving tank (1) is also provided with an exhaust port (25). The invention can control and recover a large amount of H generated in the dissolution reaction2And a NOx gas; controlling the speed of the dissolution reaction to avoid H2The risk of explosion due to too high a concentration.
Description
Technical Field
The invention belongs to the technical field of spent fuel post-treatment, and particularly relates to a dissolving system for an aluminum matrix mercury catalysis technology.
Background
After the neptunium target is irradiated out of the reactor, the neptunium target contains plutonium produced by conversion and the rest of radioactive elements such as the neptunium, and the like, and the radioactive elements are dispersed in a high-purity aluminum matrix ring (figure 1), the purity of aluminum is 99.999%, and before the neptunium and the plutonium are extracted by using a chemical extraction and separation method, the aluminum matrix ring containing the neptunium and the plutonium is firstly required to be dissolved.
Because aluminum metal is relatively active, oxidation in nitric acid easily generates an oxide film protective layer, so that the dissolution is hindered, and the aluminum metal cannot be directly dissolved by the nitric acid. Generally, mercury is used as a catalyst, and the dissolving is carried out by a nitric acid heating method. The principle of catalytic dissolution of mercury is that divalent mercury ions contact the surface of the aluminum substrate and are reduced to mercury metal, which forms an aluminum amalgam with aluminum and destroys the oxide layer. The aluminum amalgam is dissolved by nitric acid, thereby achieving dissolution of aluminum. The mercury turns back into divalent mercury. The reaction is very rapid and difficult to control, and a large amount of gas is generated. The mercury-catalyzed dissolution of aluminum can cause several reactions (equations (1) - (5)) to produce large amounts of H2And NOxA gas.
Al+3HNO3→Al(NO3)3+1.5H2↑ (1)
Al+3.6HNO3→Al(NO3)3+0.3N2↑+1.8H2O (2)
Al+3.75HNO3→Al(NO3)3+0.375N2O↑+1.875H2O (3)
Al+4HNO3→Al(NO3)3+NO↑+2H2↑ (4)
Al+6HNO3→Al(NO3)3+3NO2↑+3H2O (5)
Disclosure of Invention
Aiming at the problem that the catalytic dissolution of mercury is difficult to control, the invention aims to design a method capable of controlling and recovering a large amount of H generated in the catalytic dissolution reaction of mercury2And NOx gas, controlling the speed of the mercury catalytic dissolution reaction and avoiding H2Mercury catalytic dissolving device with explosion risk caused by too high concentration.
In order to achieve the purpose, the technical scheme adopted by the invention is an aluminum matrix mercury catalysis technology dissolving system which is used for dissolving an aluminum matrix ring of a neptunium target by utilizing mercury catalysis dissolving reaction, wherein the system comprises a strong acid resistant and high temperature resistant dissolving tank, a charging chute and a dissolving tank, wherein the dissolving tank is used for carrying out the mercury catalysis dissolving reaction, and a temperature control device for adjusting the temperature of the dissolving tank is arranged on the periphery of the dissolving tank; a dropwise adding pipe for adding nitric acid, a feeding pipe for adding a mercury nitrate solution, a bubbling pipe for introducing nitrogen into the solution in the dissolving tank, and a discharging pipe for discharging the solution in which the aluminum matrix ring is dissolved are further arranged on the dissolving tank in a penetrating manner; and the top of the dissolving tank is also provided with an exhaust port.
Further, the dissolving tank is a vertical double-elliptical end enclosure container made of 316L stainless steel or titanium alloy materials and divided into an upper tank body and a lower tank body, the upper tank body and the lower tank body are connected through flanges, and the flanges are sealed through fluororubber sealing rings; the feeding chute is arranged on the upper tank body, a baffle valve for sealing is arranged in the feeding chute, and the baffle valve adopts a double-electromagnetic-valve structure; the dropping pipe, the feeding pipe and the discharging pipe penetrate into the dissolving tank from the upper tank body, and the exhaust port is arranged on the upper tank body; the dropping pipe and the feeding pipe are positioned at one end in the dissolving tank and are far away from the bottom of the dissolving tank; one end of the bubbling pipe and the discharge pipe, which are positioned in the dissolving tank, is close to the bottom of the dissolving tank; an exhaust pipe with an exhaust hole is arranged at one end of the bubbling pipe, which is positioned in the dissolving tank, and the air bubbles discharged by the exhaust pipe can fully disturb the solution in the dissolving tank; and the bottom of the dissolving tank is also provided with an emptying pipe for emptying the dissolving tank.
Further, the temperature control device is a heating and refrigerating jacket arranged on the outer surface of the lower tank body, and the dissolving tank is heated or cooled by inputting steam or cooling water; and the heating and refrigerating jacket is provided with an input pipe and an output pipe which are used for inputting and outputting steam or cooling water.
Further, the device also comprises a negative pressure monitoring device arranged at the top of the dissolving tank, and the negative pressure monitoring device is used for maintaining the negative pressure in the dissolving tank in the mercury catalytic dissolution reaction process and avoiding heat and H in the dissolver2Accumulation of concentration.
The condenser is used for condensing the waste gas generated by the mercury catalytic dissolution reaction in the dissolving tank and then discharging the condensed waste gas through a fifth pipeline, and meanwhile, the condenser sends the NOx gas condensed and recovered from the waste gas into the dissolver through a second pipeline.
Further, the system also comprises a caustic washing tower and a sodium sulfide washing tower which are connected in series with the downstream of the condenser, wherein the caustic washing tower is connected with the condenser through a fifth pipeline and receives the waste gas; the alkali washing tower and the sodium sulfide washing tower are connected through a sixth pipeline; and the waste gas discharged from the condenser sequentially passes through the alkaline washing tower and the sodium sulfide washing tower, so that the mercury vapor in the waste gas is absorbed and dissolved.
The device further comprises a buffer tank and a vacuum tank which are connected in series with the downstream of the sodium sulfide washing tower, wherein the buffer tank is connected with the sodium sulfide washing tower through a seventh pipeline and is used for guiding the discharge trend of the washed waste gas and controlling the pressure of negative pressure; the vacuum tank is connected with the buffer tank through an eighth pipeline and used for generating the negative pressure, controlling and adjusting the pressure of the negative pressure and guiding the trend of the waste gas in the buffer tank.
The system is characterized by further comprising a tail gas detection device connected with the alkaline washing tower and the sodium sulfide washing tower in parallel, wherein the air inlet end of the tail gas detection device is connected to the fifth pipeline, the air exhaust end of the tail gas detection device is connected to the seventh pipeline, and the tail gas detection device is used for detecting the content of nitrogen oxides and hydrogen in the tail gas and controlling the reaction speed of the mercury catalytic dissolution reaction.
And the temperature measuring device is used for measuring the temperature in the dissolving tank through a temperature measuring pipe arranged on the upper tank body in a penetrating way.
Further, still include with the dissolving tank passes through the acidification tank that the ninth pipeline links to each other, the ninth pipeline with the dropwise add pipe links to each other, acidification tank is used for to provide nitric acid in the dissolving tank.
The invention has the beneficial effects that:
1. the dissolving system of the aluminum matrix mercury catalysis technology provided by the invention has the capabilities of being fast, being capable of controlling the dissolving reaction speed and efficiently dissolving aluminum matrix rings or aluminum matrix dispersoid materials.
2. The aluminum matrix mercury catalysis technology dissolving system provided by the invention fully considers the application of a hot chamber and other extreme environments on the design concept, can realize remote operation, and the main material of the dissolving tank is stainless steel or titanium alloy material with nitric acid corrosion resistance and strong radioactive radiation resistance.
3. The feeding chute for feeding the aluminum matrix ring is sealed by adopting a double-electromagnetic-valve structure, so that the radioactive substances in the dissolving tank can be effectively isolated from the hot chamber environment.
4. The aluminum matrix mercury catalysis technology dissolving system provided by the invention can effectively control and treat a large amount of NOx gas and mercury vapor generated in the dissolving reaction.
5. The aluminum matrix mercury catalysis technology dissolving system provided by the invention has the function of monitoring the hydrogen concentration in the dissolving process, and has the capability of manually or automatically processing the excessive hydrogen concentration.
Drawings
FIG. 1 is an axial cross-sectional view of an aluminum base ring as set forth in the background of the invention;
FIG. 2 is a schematic illustration of an aluminum matrix mercury catalytic technology dissolution system according to an embodiment of the present invention;
FIG. 3 is a schematic view of a dissolving tank according to an embodiment of the present invention;
in the figure: 1-a dissolving tank, 2-a condenser, 3-an acid adding tank, 4-an alkaline washing tower, 5-a sodium sulfide washing tower, 6-a buffer tank, 7-a vacuum tank, 8-a tail gas detection device, 9-a first pipeline, 10-a second pipeline, 11-a third pipeline, 12-a fourth pipeline, 13-a fifth pipeline, 14-a sixth pipeline, 15-a seventh pipeline, 16-an eighth pipeline, 17-a ninth pipeline, 18-a feeding chute, 19-a flange, 20-a feeding pipe, 21-a discharging pipe, 22-a dropping pipe, 23-a bubbling pipe, 24-an emptying pipe, 25-an exhaust port, 26-a heating and refrigerating jacket, 27-an input pipe, 28-an output pipe, 29-a temperature measuring pipe and 30-an exhaust pipe.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 2, the aluminum matrix mercury catalytic technology dissolving system provided by the invention is used for dissolving an aluminum matrix ring of a neptunium target by using mercury catalytic dissolution reaction, and comprises a dissolving tank 1, a condenser 2, an acid adding tank 3, an alkaline washing tower 4, a sodium sulfide washing tower 5, a buffer tank 6, a vacuum tank 7, a tail gas detection device 8 and other devices. In the invention, an aluminum base ring is added into a dissolving tank 1 at one time, and nitric acid (the concentration of the nitric acid is 1-6mol/L HNO) is dropwise added3) In order to control the reaction.
As shown in fig. 3, the dissolving tank 1 is used for carrying out mercury catalytic dissolution reaction to dissolve an aluminum base ring of the neptunium target, the dissolving tank 1 is a vertical double-elliptical head container made of 316L stainless steel or titanium alloy material with strong acid resistance and high temperature resistance, and is divided into an upper tank body and a lower tank body, the upper tank body and the lower tank body are connected through a flange 19, and the flange 19 is sealed by a fluororubber sealing ring with strong acid corrosion resistance. The length of the dissolving tank 1 is 800-. A temperature control device for adjusting the temperature of the dissolving tank 1 is arranged at the periphery of the dissolving tank 1; the dissolving tank 1 is also provided with a dropwise adding pipe 22 for adding nitric acid, a feeding pipe 20 for adding mercury nitrate solution, and a water inlet pipe for introducing mercury nitrate solution into the dissolving tank 1Bubbling tube 23 for introducing nitrogen gas into the solution (due to the reaction process, a large amount of H is generated2And NOx gases, the dissolver design needs to be considered for H control2Explosive concentration and NOx gas recovery. Diluting H by bubbling stirring with N22Concentration, control of H2The explosive limit of (c). ) A discharge pipe 21 for discharging a solution in which the aluminum base ring is dissolved; the top of the dissolving tank 1 is also provided with an exhaust port 25.
The feeding chute 18 is arranged on the upper tank body, a baffle valve for sealing is arranged in the feeding chute 18, and the baffle valve adopts a double-electromagnetic-valve structure; the dropping pipe 22, the feeding pipe 20 and the discharging pipe 21 penetrate into the dissolving tank 1 from the upper tank body, and the exhaust port 25 is arranged on the upper tank body; the end of the dripping pipe 22 and the feeding pipe 20 which are positioned in the dissolving tank 1 is far away from the bottom of the dissolving tank 1; one end of the bubbling pipe 23 and the discharging pipe 21 in the dissolving tank 1 is close to the bottom of the dissolving tank 1; one end of the bubbling pipe 23, which is positioned in the dissolving tank 1, is provided with an exhaust pipe 30 with an exhaust hole, and the air bubbles discharged from the exhaust pipe 30 can fully disturb the solution in the dissolving tank 1; an emptying pipe 24 is also provided at the bottom of the dissolving tank 1 for emptying the dissolving tank 1.
The temperature control device is a heating and refrigerating jacket 26 arranged on the outer surface of the lower tank body, realizes heating or cooling of the dissolving tank 1 by inputting steam or cooling water and is used for controlling the catalytic reaction temperature to be kept at 90-105 ℃; the heating and cooling jacket 26 is provided with an inlet pipe 27 and an outlet pipe 28 for the inlet and outlet of steam or cooling water.
The device also comprises a negative pressure monitoring device arranged at the top of the dissolving tank 1 and used for keeping the negative pressure in the dissolving tank 1 in the mercury catalytic dissolution reaction process and avoiding heat and H in the dissolver 12Accumulation of concentration.
As shown in fig. 2, the condenser 2 is connected to the exhaust port 25 through a first line 9, the condenser 2 is used for condensing the exhaust gas generated by the catalytic dissolution reaction of mercury in the dissolution tank 1 and then discharging the exhaust gas through a fifth line 13, and the condenser 2 sends the NOx gas condensed and recovered from the exhaust gas into the dissolver 1 through a second line 10. The cooling water of the condenser 2 enters the condenser 2 through a third line 11 and exits the condenser 2 through a fourth line 12.
As shown in fig. 2, an alkaline scrubber 4 and a sodium sulfide scrubber 5 are connected in series downstream of the condenser 2, and the alkaline scrubber 4 is connected to the condenser 2 through a fifth pipeline 13 to receive the exhaust gas; the alkaline washing tower 4 and the sodium sulfide washing tower 5 are connected through a sixth pipeline 14; the waste gas discharged from the condenser 2 passes through the alkaline washing tower 4 and the sodium sulfide washing tower 5 in sequence to absorb and dissolve mercury vapor in the waste gas (the mercury vapor is generated in the mercury catalytic reaction process in the dissolving tank 1).
As shown in fig. 2, the buffer tank 6 and the vacuum tank 7 are connected in series at the downstream of the sodium sulfide washing tower 5, and the buffer tank 6 is connected with the sodium sulfide washing tower 5 through a seventh pipeline 15 and is used for guiding the discharge direction of the washed exhaust gas and controlling the pressure of negative pressure; the vacuum tank 7 is connected with the buffer tank 6 through an eighth pipeline 16 and is used for generating negative pressure, controlling and adjusting the pressure of the negative pressure and guiding the trend of the waste gas in the buffer tank 6.
As shown in fig. 2, the tail gas detection device 8 is connected in parallel with the alkaline washing tower 4 and the sodium sulfide washing tower 5, the air inlet end of the tail gas detection device 8 is connected to the fifth pipeline 13, the exhaust end of the tail gas detection device 8 is connected to the seventh pipeline 15, and the tail gas detection device 8 is used for detecting the content of nitrogen oxides and hydrogen in the tail gas and controlling the reaction speed of the mercury catalytic dissolution reaction.
And the temperature measuring device is used for measuring the temperature in the dissolving tank 1 through a temperature measuring pipe 29 arranged on the upper tank body in a penetrating way.
As shown in FIG. 2, the acid addition tank 3 is connected to the dissolution tank 1 through a ninth line 17, the ninth line 17 is connected to a dropping pipe 22, and the acid addition tank 3 is used for supplying nitric acid into the dissolution tank 1.
Finally, the practical application of the aluminum matrix mercury catalytic technology dissolving system provided by the invention is illustrated:
150 aluminum base rings are put into the dissolving tank 1 through a feeding chute 18, a certain volume of nitric acid and mercuric nitrate solution is added into the dissolving tank 1, and N is blown through a bubbling pipe 232Stirring, and adjusting the negative pressure monitoring device to maintain the interior of the dissolving tank 1 in a negative pressure state; heating and warming the dissolving tank 1 by the heating and refrigerating jacket 26, and dripping nitric acid into the dissolving tank 1 by the dripping pipe 22 to perform aluminum matrix ring formationDissolving. The dissolution duration was about 150 min.
During the dissolution process, the temperature of the dissolution tank 1 and H2The concentration control is stable; the system maintains a negative pressure state in the whole dissolving process, and no radioactive leakage occurs; the temperature of the tail gas outlet (namely the end of the fifth pipeline 13 connected with the condenser 2) of the condenser 2 is highest and is below 44 ℃, the temperature of the circulating water outlet (namely the end of the fourth pipeline 12 connected with the condenser 2) of the condenser 2 is highest and is 37.9 ℃, and the condensed water flowing out of the condenser 2 is monitored to have no radioactive leakage; the mercury vapor content in the tail gas reaches the standard; the dissolving solution in the dissolving tank 1 is clear and transparent, and can meet the requirement of further electrochemical dissolution of radioactive elements such as plutonium, neptunium and the like contained in the dissolving solution.
The device according to the present invention is not limited to the embodiments described in the specific embodiments, and those skilled in the art can derive other embodiments according to the technical solutions of the present invention, and also belong to the technical innovation scope of the present invention.
Claims (9)
1. The utility model provides an aluminum matrix mercury catalysis technology dissolving system for utilize mercury catalysis dissolving reaction to dissolve the aluminum matrix ring of neptunium target, characterized by: the mercury catalytic dissolving device comprises a strong acid resistant and high temperature resistant dissolving tank (1) which is provided with a feeding chute (18) and used for carrying out mercury catalytic dissolving reaction, wherein a temperature control device for adjusting the temperature of the dissolving tank (1) is arranged on the periphery of the dissolving tank (1); a dropwise adding pipe (22) for adding nitric acid, a feeding pipe (20) for adding a mercury nitrate solution, a bubbling pipe (23) for introducing nitrogen into the solution in the dissolving tank (1), and a discharging pipe (21) for discharging the solution in which the aluminum matrix ring is dissolved are further arranged on the dissolving tank (1) in a penetrating manner; the top of the dissolving tank (1) is also provided with an exhaust port (25);
the dissolving tank (1) is a vertical double-elliptical end enclosure container made of 316L stainless steel or titanium alloy materials and divided into an upper tank body and a lower tank body, the upper tank body and the lower tank body are connected through flanges (19), and the flanges (19) are sealed by a fluororubber sealing ring; the feeding chute (18) is arranged on the upper tank body, a baffle valve for sealing is arranged in the feeding chute (18), and the baffle valve adopts a double-electromagnetic-valve structure; the dropping pipe (22), the feeding pipe (20) and the discharging pipe (21) penetrate into the dissolving tank (1) from the upper tank body, and the exhaust port (25) is arranged on the upper tank body; the dripping pipe (22) and the feeding pipe (20) are positioned at one end in the dissolving tank (1) and are far away from the bottom of the dissolving tank (1); one end of the bubbling pipe (23) and the discharge pipe (21) which are positioned in the dissolving tank (1) is close to the bottom of the dissolving tank (1); one end of the bubbling pipe (23) positioned in the dissolving tank (1) is provided with an exhaust pipe (30) with an exhaust hole, and the air bubbles discharged by the exhaust pipe (30) can fully disturb the solution in the dissolving tank (1); the bottom of the dissolving tank (1) is also provided with an emptying pipe (24) for emptying the dissolving tank (1).
2. The aluminum matrix mercury catalytic technology dissolution system of claim 1, wherein: the temperature control device is a heating and refrigerating jacket (26) arranged on the outer surface of the lower tank body, and the dissolving tank (1) is heated or cooled by inputting steam or cooling water; an input pipe (27) and an output pipe (28) are arranged on the heating and refrigerating jacket (26) and are used for inputting and outputting steam or cooling water.
3. The aluminum matrix mercury catalytic technology dissolution system of claim 1, wherein: the device is characterized by further comprising a negative pressure monitoring device arranged at the top of the dissolving tank (1) and used for maintaining the negative pressure in the dissolving tank (1) in the mercury catalytic dissolving reaction process and avoiding the accumulation of heat and H2 concentration in the dissolving tank (1).
4. The aluminum matrix mercury catalytic technology dissolution system of claim 1, wherein: the mercury catalytic dissolving system is characterized by further comprising a condenser (2) connected with the exhaust port (25) through a first pipeline (9), wherein the condenser (2) is used for condensing waste gas generated by mercury catalytic dissolving reaction in the dissolving tank (1) and then discharging the condensed waste gas through a fifth pipeline (13), and meanwhile, the condenser (2) is used for sending NOx gas condensed and recovered from the waste gas into the dissolving tank (1) through a second pipeline (10).
5. The aluminum matrix mercury catalytic technology dissolution system of claim 4, wherein: the system also comprises an alkali washing tower (4) and a sodium sulfide washing tower (5) which are connected in series at the downstream of the condenser (2), wherein the alkali washing tower (4) is connected with the condenser (2) through a fifth pipeline (13) and receives the waste gas; the alkali washing tower (4) and the sodium sulfide washing tower (5) are connected through a sixth pipeline (14); and the waste gas discharged from the condenser (2) sequentially passes through the alkaline washing tower (4) and the sodium sulfide washing tower (5), so that the mercury vapor in the waste gas is absorbed and dissolved.
6. The aluminum matrix mercury catalytic technology dissolution system of claim 5, wherein: the device is characterized by also comprising a buffer tank (6) and a vacuum tank (7) which are connected in series with the downstream of the sodium sulfide washing tower (5), wherein the buffer tank (6) is connected with the sodium sulfide washing tower (5) through a seventh pipeline (15) and is used for guiding the discharge trend of the washed waste gas and controlling the pressure of negative pressure; the vacuum tank (7) is connected with the buffer tank (6) through an eighth pipeline (16) and is used for generating negative pressure, controlling and adjusting the pressure of the negative pressure and guiding the trend of the waste gas in the buffer tank (6).
7. The aluminum matrix mercury catalytic technology dissolution system of claim 5, wherein: the device is characterized by further comprising a tail gas detection device (8) connected with the alkaline washing tower (4) and the sodium sulfide washing tower (5) in parallel, wherein the air inlet end of the tail gas detection device (8) is connected to the fifth pipeline (13), the air exhaust end of the tail gas detection device (8) is connected to the seventh pipeline (15), and the tail gas detection device (8) is used for detecting the content of nitrogen oxides and hydrogen in the tail gas and controlling the reaction speed of the mercury catalytic dissolution reaction.
8. The aluminum matrix mercury catalytic technology dissolution system of claim 5, wherein: the temperature measuring device is characterized by further comprising a temperature measuring device for measuring the temperature in the dissolving tank (1) through a temperature measuring pipe (29) arranged on the upper tank body in a penetrating mode.
9. The aluminum matrix mercury catalytic technology dissolution system of claim 1, wherein: still include with dissolving tank (1) is through ninth pipeline (17) continuous add acid jar (3), ninth pipeline (17) with dropwise add pipe (22) link to each other, add acid jar (3) be used for to provide nitric acid in dissolving tank (1).
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| CN102513000B (en) * | 2011-12-01 | 2013-10-02 | 清华大学 | Dissolving system |
| CN204738001U (en) * | 2015-03-31 | 2015-11-04 | 新疆兵团现代绿色氯碱化工工程研究中心(有限公司) | System for mercury in useless mercury catalyst of high -efficient environmental protection recovery |
| CN108310955B (en) * | 2018-01-30 | 2021-01-01 | 湖南西林环保材料有限公司 | Method for in-situ recovery of mercury from mercury-containing flue gas in non-ferrous metal metallurgy |
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