阅读说明：本技术 一种硝酸银集成式生产装置 (Silver nitrate integrated production device ) 是由 吴雁 黄垂产 于 2019-07-08 设计创作，主要内容包括：本发明提出了一种硝酸银集成式生产装置,包含浓硝酸加料罐,双氧水加料罐,反应釜、除杂釜、氧化银加料罐、结晶釜、蒸汽管道、甩干装置、下料装置、废气处理排放总管道和计算机CPU控制系统。所述的反应釜、除杂釜、结晶釜、甩干装置和下料装置自上而下按顺序竖直摆放,双氧水加料罐和浓硝酸加料罐的垂直高度位置要位于反应釜的垂直高度位置之上,氧化银加料罐的垂直高度位置要位于除杂釜的垂直高度位置之上。本发明的目的借助反应产物的自身重力通过自动控制流向相对应的下一道工序中,省去了传统装置中为了完成硝酸银制备过程而需要提供输送外力的设备,节约生产成本,同时生产装置摆放紧凑,节约了占地面积。(The invention provides a silver nitrate integrated production device which comprises a concentrated nitric acid feeding tank, a hydrogen peroxide feeding tank, a reaction kettle, an impurity removal kettle, a silver oxide feeding tank, a crystallization kettle, a steam pipeline, a drying device, a discharging device, a waste gas treatment and discharge main pipeline and a computer CPU control system. The reaction kettle, the impurity removing kettle, the crystallization kettle, the spin-drying device and the blanking device are vertically placed from top to bottom in sequence, the vertical height positions of the hydrogen peroxide feeding tank and the concentrated nitric acid feeding tank are to be located above the vertical height position of the reaction kettle, and the vertical height position of the silver oxide feeding tank is to be located above the vertical height position of the impurity removing kettle. The invention aims to save the equipment for conveying external force for completing the silver nitrate preparation process in the traditional device by automatically controlling the flow direction of the reaction product to the corresponding next process by virtue of the self gravity of the reaction product, thereby saving the production cost, and simultaneously, the production device is compactly arranged and saves the occupied area.)

1. An integrated silver nitrate production device comprises a concentrated nitric acid feeding tank (1), a hydrogen peroxide feeding tank (4), a reaction kettle (7), an impurity removing kettle (10), a silver oxide feeding tank (18), a crystallization kettle (12), a steam pipeline (13), a spin-drying device (14), a discharging device (15), a waste gas treatment and discharge main pipeline (5) and a computer CPU control system, and is characterized in that the reaction kettle (7), the impurity removing kettle (10), the crystallization kettle (12), the spin-drying device (14) and the discharging device (15) are vertically arranged from top to bottom in sequence; the device is characterized in that a reaction kettle (7) is connected with a hydrogen peroxide feeding tank (4) with a second flow meter (6) and a second regulating valve (16) and a concentrated nitric acid feeding tank (1) with a first flow meter (2) and a first regulating valve (3), a stainless steel pad net (8) used for placing reaction raw materials (silver powder or silver blocks) is arranged in the reaction kettle (7), the reaction kettle (7) is connected with a steam pipeline (13) with a regulating valve, the vertical height positions of the hydrogen peroxide feeding tank (4) and the concentrated nitric acid feeding tank (1) are located above the vertical height position of an impurity removing kettle (10), the impurity removing kettle (10) is connected with the reaction kettle (7) through a pipeline with a first filter (9) and a fifth regulating valve (21), the impurity removing kettle (10) is connected with a silver oxide feeding tank (18) with a third flow meter (20) and a fourth regulating valve (19), and the impurity removing kettle (10) is connected with a steam pipeline (13) with a regulating valve, the vertical height position of the silver oxide feeding tank (18) is positioned above the vertical height position of the impurity removing kettle (10).

2. The integrated silver nitrate production apparatus according to claim 1, wherein: reation kettle (7), edulcoration cauldron (10), crystallization kettle (12) and device (14) that spin-dries all are equipped with the steam ring shape pipeline of even through-hole in inside, steam conduit (13) are connected to steam generating device.

3. The integrated silver nitrate production apparatus according to claim 1, wherein: the crystallization kettle (12) is connected with the impurity removal kettle (10) through a pipeline with a seventh regulating valve (23), and the crystallization kettle (12) is connected with a steam pipeline (13) with an eighth regulating valve (24).

4. The integrated silver nitrate production apparatus according to claim 1, wherein: the drying device (14) is connected with the crystallization kettle (12) through a pipeline with a ninth regulating valve (25), and the drying device (14) is connected with a steam pipeline (13) with a tenth regulating valve (26).

5. The integrated silver nitrate production apparatus according to claim 1, wherein: the blanking device (15) is connected with the spin-drying device (14) through a pipeline with an eleventh regulating valve (27).

6. The integrated silver nitrate production apparatus according to claim 1, wherein: the reaction kettle (7), the impurity removing kettle (10), the crystallization kettle (12) and the drying device (14) are connected to a waste gas treatment and discharge main pipeline (5) through an exhaust pipeline with an adjusting valve.

Technical Field

The invention relates to an integrated silver nitrate production device.

Background

Silver nitrate is widely used in industry as a chemical. The inorganic industry is used to make other silver salts; the electronics industry is used to make conductive adhesives, novel gas purifiers, and the like; the electroplating industry is used for silver plating of electronic components and other artware; the battery industry is used to produce silver-zinc batteries; the daily chemical industry is used for measuring chlorine, bromine, iodocyanide and thiocyanate in analytical chemistry such as hair dyeing; it is also used as a bactericide, a corrosive agent, etc. in medicine. With the increasing market demand of silver nitrate, the price competition of silver nitrate is also more intense. How to reduce the production cost of silver nitrate becomes the primary problem for silver nitrate manufacturers. At present, silver nitrate is prepared by reacting silver powder with concentrated nitric acid to obtain silver nitrate solution, and then removing impurities, evaporating for crystallization, centrifugally drying and drying to obtain a finished silver nitrate crystal product.

Disclosure of Invention

In order to improve the product competitiveness of silver nitrate and reduce the production cost of the silver nitrate, the invention designs a silver nitrate integrated production device.

As shown in fig. 1, the integrated silver nitrate production device of this embodiment includes a concentrated nitric acid feeding tank, a hydrogen peroxide feeding tank, a reaction kettle, an impurity removing kettle, a silver oxide feeding tank, a crystallization kettle, a steam pipeline, a drying device, a blanking device, a waste gas treatment and discharge main pipeline, and a computer CPU control system. Wherein the reaction kettle, the impurity removal kettle, the crystallization kettle, the spin-drying device and the blanking device are vertically arranged from top to bottom in sequence.

The reaction kettle is connected with a hydrogen peroxide feeding tank with a second flow meter and a second regulating valve and a concentrated nitric acid feeding tank with a first flow meter and a first regulating valve, and the vertical height positions of the hydrogen peroxide feeding tank and the concentrated nitric acid feeding tank are to be located above the vertical height position of the reaction kettle.

The impurity removing kettle is connected with a silver oxide feeding tank with a third flow meter and a fourth regulating valve. The vertical height position of the silver oxide feeding tank is above the vertical height position of the impurity removing kettle.

A silver nitrate integrated form apparatus for producing passes through computer CPU control system and adjusts second governing valve on reation kettle hydrogen peroxide solution charging tank and the first governing valve size on the concentrated nitric acid charging tank, makes hydrogen peroxide solution and concentrated nitric acid solution rely on the gravity of self to get into reation kettle and react, and its reaction is as follows:

Ag + 2HNO₃(concentrated) → AgNO₃+ H₂O + NO₂↑；

Ag + 2HNO₃(dilute) → AgNO₃+ H₂O + NO ↑。

And opening a fifth regulating valve on a pipeline connecting the reaction kettle and the impurity removal kettle, and enabling the produced silver nitrate solution to enter the impurity removal kettle by means of the gravity of the silver nitrate solution to be subjected to impurity removal treatment. And controlling the size of a fourth regulating valve on the silver oxide feeding tank, and enabling the silver oxide solution to enter the impurity removing kettle by means of the gravity of the silver oxide solution. And the computer CPU control system automatically adjusts the size of the fourth adjusting valve according to the pH value of the silver nitrate solution, and controls the dosage of the silver oxide solution entering the impurity removing kettle.

And after the impurity removal is finished, opening a seventh regulating valve on a pipeline connecting the crystallization kettle and the impurity removal kettle, and allowing the silver nitrate solution to enter the crystallization kettle by means of the gravity of the silver nitrate solution to be evaporated, concentrated and crystallized.

And (3) after the crystallization process is finished, opening a ninth regulating valve on a pipeline connecting the crystallization kettle and the spin-drying device, and allowing the silver nitrate crystals to enter the spin-drying device by means of the gravity of the silver nitrate crystals to be centrifugally spun and dried to obtain finished silver nitrate crystals.

And opening an eleventh adjusting valve between the spin-drying device and the blanking device under the control of a computer CPU control system, and feeding the silver nitrate crystal finished product into the blanking device to finish assembly line blanking packaging of the silver nitrate crystal finished product.

The invention has the following beneficial effects: the dead weight of the auxiliary reaction product flows to the respective next process through automatic control, so that equipment for conveying external force is omitted for completing the silver nitrate preparation process in the traditional device, the production cost is saved, and meanwhile, the production device is compactly placed, and the occupied area is saved.

Drawings

Fig. 1 is a schematic view of the overall structure of the invention.

1-concentrated nitric acid feeding tank; 2-a first flow meter; 3-a first regulating valve; 4-a hydrogen peroxide feeding tank; 5-a waste gas treatment discharge main pipeline; 6 a second flow meter; 7-a reaction kettle; 8, a stainless steel backing net; 9-a first filter; 10-impurity removing kettle; 11-a second filter; 12-a crystallization kettle; 13-a steam line; 14-a spin-drying device; 15-a blanking device; 16-a second regulating valve; 17-a third regulating valve; 18-silver oxide feed tank; 19-a fourth regulating valve; 20-a third flow meter; 21-fifth regulating valve; 22-sixth regulating valve; 23-a seventh regulating valve; 24-an eighth regulator valve; 25-ninth regulating valve; 26-tenth regulating valve; 27-eleventh regulating valve.

Detailed Description

The invention will be further described and illustrated with reference to the following examples and the accompanying drawings, without limiting the invention in any way.

As shown in fig. 1, the integrated silver nitrate production device of this embodiment includes a concentrated nitric acid feeding tank 1, a hydrogen peroxide feeding tank 4, a reaction kettle 7, an impurity removing kettle 10, a crystallization kettle 12, a steam pipeline 13, a drying device 14, a blanking device 15, a waste gas treatment and discharge main pipeline 5, and a computer CPU control system.

The silver nitrate integrated production device is characterized in that a reaction kettle 7, an impurity removal kettle 10, a crystallization kettle 12, a drying device 14 and a blanking device 15 are vertically arranged from top to bottom in sequence.

Reation kettle 7 connects takes the hydrogen peroxide solution charging tank 4 of second flow 6 and second governing valve 16 and takes first flow meter 2 and the concentrated nitric acid charging tank 1 of first governing valve 3, reation kettle 7 embeds the stainless steel backing net 8 that is used for placing reaction raw materials (silver powder or silver bullion), and reation kettle 7 has connect the steam conduit 13 of taking third governing valve 17. The vertical height positions of the hydrogen peroxide feeding tank 4 and the concentrated nitric acid feeding tank 1 are above the vertical height position of the reaction kettle 7.

The impurity removing kettle 10 is connected with the reaction kettle 7 through a pipeline with a first filter 9 and a fifth regulating valve 21, the impurity removing kettle 10 is connected with a silver oxide feeding tank 18 with a third flow meter 20 and a fourth regulating valve 19, and the impurity removing kettle 10 is connected with a steam pipeline 13 with a seventh regulating valve 22. The vertical height position of the silver oxide feeding tank 18 is higher than that of the impurity removing kettle 10.

The crystallization kettle 12 is connected with the impurity removing kettle 10 through a pipeline with a second filter 11 and a seventh regulating valve 23. The crystallization kettle 12 is connected with a steam pipeline 13 with an eighth regulating valve 24.

The drying device 14 is connected with the crystallization kettle 12 through a pipeline with a ninth regulating valve 25, and the drying device 14 is connected with a steam pipeline 13 with a tenth regulating valve 26.

The discharge device 15 is connected to the spin dryer 14 via a line with an eleventh control valve 27.

The reaction kettle 7, the impurity removing kettle 10, the crystallization kettle 12 and the drying device 14 are connected to a tail gas centralized treatment discharge main pipe 5 through an exhaust pipeline with an adjusting valve.

The method comprises the following specific operation steps:

1) weighing a certain amount of silver blocks or silver powder and placing the silver blocks or silver powder on a stainless steel pad 8 in a reaction kettle 7, automatically adjusting the valve sizes of a second adjusting valve 16 on a hydrogen peroxide feeding tank 4 and a first adjusting valve 3 on a concentrated nitric acid feeding tank 1 by a computer CPU control system, and allowing a proper amount of hydrogen peroxide solution and a concentrated nitric acid solution to enter the reaction kettle 7 for chemical reaction;

2) opening a third regulating valve 17 on the steam pipeline 13, and heating to the temperature required by the reaction; after the reaction is finished, opening a fifth regulating valve 21, filtering the generated silver nitrate solution by a first filter 9, and then feeding the silver nitrate solution into an impurity removal kettle 10 for impurity removal treatment;

3) opening a third regulating valve 17 on a silver oxide feeding tank 18 connected to the impurity removing kettle 10, adding a proper amount of silver oxide solution to carry out PH regulation impurity removal, simultaneously opening a sixth regulating valve 22 on a steam pipeline 13, and heating to reach a proper temperature with the best impurity removal effect;

4) and opening a seventh regulating valve 23, filtering the silver nitrate solution subjected to impurity removal through a second filter 11, and then feeding the silver nitrate solution into a crystallization kettle 12. Opening an eighth regulating valve 24 on the steam pipeline 13, heating, evaporating, concentrating and crystallizing the silver nitrate solution;

5) opening the ninth adjusting valve 25, allowing the silver nitrate crystals to enter the spin-drying device 14 for centrifugal spin-drying, opening the tenth adjusting valve 26 on the steam pipeline 13, and drying the silver nitrate crystals to obtain finished silver nitrate crystals;

6) and opening the eleventh regulating valve 27, and feeding the silver nitrate crystal finished product into the feeding device 14 for assembly line feeding and packaging.