Section 126 Acids and Bases (2)

The lacquer cut from the lacquer tree is hardly afraid of any corrosion, whether it is water, strong acid, strong alkali. Lingao does not produce sumacs, but there are many in Guangdong. The Labor and Energy Committee imported some, Xu Yingjie adjusted a large water tank, and then soaked the straw rope in it after the concoction was suitable for the thickness, instead of the asbestos rope and water glass. But he also paid the price - although he did the full body protection, his hands were still "bitten by paint". My fingers were swollen and I had to rest for a few days in a row.

Ji Siwei casually took out a jar and tried the threaded lid: "This jar is good, it is necessary to maintain long-term production, and in the future, sulfuric acid, nitric acid, hydrochloric acid, ......, and chemicals are in great demand." Ji Siwei said, "I still have a list, which is equipment for chemical industry, you can quickly organize people to make it." ”

"Still going to do it?" Xiao Bailang complained bitterly, "I haven't slept well for three or four days." There are only a dozen workers in the ceramic factory. That's a lot of work! He took the list, which listed more than thirty water tanks of various sizes, large and small, as well as a number of other ceramics.

"Make such a water tank! Are you going to make pickles? ”

"It has something to do with salt," Ji Siwei said, "It's all used in engineering, so hurry up." ”

"Then you give some overtime pay, my potters here have been busy working day and night lately."

"You ask Wu for overtime pay, where did I get the circulation coupons." Ji Siwei is not interested in the welfare of the natives, "Aren't they burning kilns in Fujian day and night, and the kiln owners will give them overtime pay?" ”

"You capitalist is too black-hearted......"

Ji Siwei interrupted his grumbling-: "I'm in a hurry to use this, please hurry up." ”

After the cans were brought back, Ji Siwei built a straw shed next to the sulfuric acid plant and slept for a while. In the evening, when the 12 hours had expired, he took care of all the firewood and immediately organized the people to fill the furnace with a layer of crushed stone about the size of the ore, and then put firewood in the four furnaces to light the fire.

Seeing that the fire was already big, Ji Siwei took care of the workers to join the Shanghaode Hongji anthracite, and the fire suddenly became fierce, and the entire sulfuric acid plant was on fire.

"Well, everyone except the one who watched the stove add fire, everyone else went to rest. We'll start work again the next morning! ”

Ji Siwei saw that he didn't have to bother, and rushed to the next construction site - the caustic soda workshop.

The ammonia and combined soda plant can only produce soda ash. Caustic soda, which is widely used in industry, is relatively easy to produce, and the raw material is also simple - salt electrolysis. Caustic soda can be obtained not only but also many useful by-products, including hydrochloric acid, another important chemical raw material. The elimination of the need to install a dedicated hydrochloric acid production line is the benefit of co-manufacturing.

Even the Ministry of Light Industry has been focusing on the problem of caustic soda -- this is related to the two major products of the Ministry of Light Industry: white paper and soap. Ji Siwei simply did it together this time.

"One sheep is driven, and two sheep are also boomed, and I can work more." Ji Siwei thought about walking to the caustic soda workshop. There was a train passing by to deliver construction materials to the caustic soda plant. He quickly trotted a few steps up and sat down on a pile of reed mats.

"Who! Don't kill the train! A man in a hard hat yelled at the tractor in front of him.

"You're a train, too?"

"It's not a train." While speaking, the train has arrived at the construction site of the caustic soda workshop, where construction is underway.

Ji Siwei got out of the car and saw that the person wearing the helmet turned out to be Bingfeng - it seems that the caustic soda factory workshop must be a steel frame structure.

Sure enough, this caustic soda workshop is simple enough, but compared with the current sulfuric acid workshop that is still naked-exposed-in-dew-day, it still has a cover--the electrolysis workshop involves the problem of electricity, and it cannot be exposed in the wind and rain. The whole building is a frame structure of brick columns and wooden beams, except for a few key parts with fences, the rest of the building is open to facilitate ventilation. Valuable and fragile transformers have separate transformers with glass windows for easy viewing.

The total area of the whole plant is about 500 square meters. The floor is paved with bricks. Chang Kaishen is taking Ling Tian and a few indigenous apprentices to install a transformer: convert the alternating current sent by the Bopu power station into direct current, so that it can be used for electrolysis.

Ten electrolyzers have been installed in place. Ji Siwei originally considered purchasing ready-made, but the weight made him give up this idea, and Zuihou only purchased the core components in another time and space. The tank is locally manufactured. The square grooves are woven with steel bars and then poured with cement yellow sand, each groove is 1.4 meters wide, 0.8 meters wide and 0.4 meters high. Tile the inside of the trough to prevent corrosion. In the trough, 0.1 meters from the bottom of the trough is inlaid with a barbed wire fence. Each trough is also equipped with a wooden lid coated with wood tar bitumen to prevent corrosion.

The heavy reinforced concrete electrolytic cell is held up by a hardwood plank and is elevated on two brick bottom brackets as a measure of insulation.

Ji Siwei checked the quality of each groove to see if there was any leakage and the tiles were not built firmly. It was found that linoleum coated with wood tar pitch was also laid in the middle of the bracket as an additional insulation measure. It's always a good idea to be careful - 400 amps, it's no joke.

"Is this safe?" Ji Siwei looked at this ugly and simple look. I really don't feel at ease.

"It's generally safe, but I can't say absolutely." Ling Tian said, "You still have to be careful with yourself. Pay attention to wearing labor protection equipment and do a good job in safety education. ”

"It's so stressful." Ji Siwei has already arrived at the chemical plant, and I am afraid that it will not be peaceful in the future, "The soil law will kill people." ”

He turned around again, and the chlorine absorption tower combined with the water tank outside the room had been erected, and the chlorine gas produced during electrolysis reacted through the slaked lime in the tower to obtain bleaching powder. It is an inexpensive and effective disinfectant-drug-product that can be widely used.

After returning from the caustic soda workshop, I rested for a while, and the hot furnace work was finally over. At this time, everyone who has something to do with the chemical industry has come.

"We're going to go two or three days without sleep." Ji Siwei said, and asked someone to drag out a few boxes from the shed. "These are protective suits, send them to everyone first, don't lose them! Now there is nowhere to find a mask or a pair of glasses! ”

Ji Sihui brought a lot of all kinds of labor protection supplies used in the chemical industry - there will be no place to replenish these things for a while. He brought almost enough wearing parts for ten years.

Everyone put on a full set of protective clothing, labor protection glasses and chemical masks. Then under the command of Ji Sihui, the construction began.

Ji Siwei first closed the plugging plate of the chimney, and then pulled out the pumping plate of the converter. Turn on the blower. He kept measuring the thermometers at each entrance with a thermometer. When the inlet temperature of the first converter reached 450 °C, Ji Siwei took care of the person to open the top cover of the converter and load it with quartz sand and catalyst. Then cover the top cover and smear it with acid-proof mud - water glass is not a rarity with soda ash industry, and porcelain powder is not, so Ji Sihui has no meaning of saving, and does not hesitate to seal the two top covers.

Xu Yingjie saw that he had sealed the top cover, and led people to start adding crushed ore to the furnace. 20 kg per furnace. Then close the furnace door. At the same time, 98% concentrated sulfuric acid received from the storage of the Planning Commission was added to the absorption tower as an introduction to start the acid cycle.

Ji Siqu tested the concentration of sulfur dioxide at the outlet of the first converter, which was close to 70% at this time. He knew that the production of sulfuric acid had been almost successful. Once the acid cycle begins in the absorber, 1.5 litres of acid are sprayed every ten seconds. Tawyn had risen to 60°C, and he turned on the water cooling.

In this way, one furnace is added every hour, and four furnaces are recycled to feed and remove slag, and the soil sulfuric acid plant is running in this way. As long as stable feeding and fire are maintained, a workshop of this size can operate 345 days a year and produce 98% concentrated sulfuric acid

Ji Siwei and the others did not have time to cheer this great moment, but were busy explaining the key points of production to the indigenous workers while they worked—on-site observation was more intuitive than a simple lecture and adapted to the cultural level of the indigenous workers.

Of course, once it is running, it will not stop unless it is overhauled or something else important - after all, it takes a long time and a lot of fuel to heat the furnace, which is not economically viable.

However, Ji Sihui only has a total of 20 tons of pyrite in his hands, and if he produces at full speed, he will be consumed in less than a month. When the pyrite will arrive again will depend on how fast the shipbuilding will be - but by this time the sulphuric acid on the coking coal should be in mass production. Sulfuric acid production here would not be too important. Ji Siwei is already thinking that if the sulfuric acid in the coal chemical plant is sufficient, then the equipment here can be used to make ammonium sulfate from pyrite as fertilizer.

The first batch of 98% concentrated sulphuric acid was produced, which was carefully packed into custom-made jars and sealed. Then the outside of the lid is closed with plaster plaster. It was also covered with a clay-fired raspberry - to keep it out from the rain.

"Does this work?" Xu Yingjie is accustomed to modern industrial packaging, and now at first glance, he feels that it is incredible, and he feels very unreliable.

"Sulfuric acid has been produced for 200 years. Don't worry, it's all packaged like this in the past. Ji Siwei said.

The jars are labeled with "98% concentrated sulfuric acid", the date of production, and the place of production, and then carefully packed into a special wooden box made by the woodworking factory, one or two boxes. The box is wrapped with straw rope to cushion the tank. It is then loaded onto a train and transported to a chemical hazmat warehouse.

After the initial victory in the sulfuric acid war, Ji Siwei led the indigenous workers to teach for more than ten days while producing, until the indigenous workers basically mastered the production process and process, and memorized all the safety production practices.