Technical innovation content:
1. Change the pre-distillation process to pre-separation--pre-distillation process, improve the capacity of one-stage decomposition, not only improve the CO2 conversion rate, but also save steam consumption;
2. Improve the internal structure of the urea synthesis tower, adopting a new high-efficiency tray technology to reduce back mixing and increase production capacity;
3. For the heart device of the urea plant--the suction tower improves its gas distribution structure, lengthens the bubbling section and separates the space, and adopts the new DL tray to improve the production efficiency and solve the heat balance;
4. The urea granulation system increases the circulating fluidized bed and the vibrating screen, which improves the yield quality and eliminates pollution;
5. Change the circulating water to use the high lift pump to select the water supply of different lift pumps according to the actual height of the user, saving power consumption;
6. The power-changing type III instrument is an advanced DCS distributed control system, which realizes the optimization of operation management;
7. Improve the structure of one sub-tower and two-tower to increase the feed hole diameter of the lower sub-column, change the diameter of the large bi-tower, increase the height of the packing and increase the outlet pipe, stabilize the operation and reduce the ammonia consumption;
8. The second-stage evaporative heater tube plate is fixed-type telescopic structure to avoid the cracking of the opening and stopping, which affects the product quality;
9. Change the second stage evaporative gas with ammonia cold water for water cooling, reduce the ice load, save electricity consumption. 0. According to the need of expansion of production capacity, the second regulator, the second cooler, the first and second evaporators, ammonia Technical recovery in recycling, tail suction system, deep hydrolysis, etc., improved operating conditions, and achieved "three wastes" discharge standards.
In the technical transformation of the urea plant, due to a series of technological innovations, the company's urea plant capacity has achieved extraordinary growth, reaching 200,000 tons / year; fixed assets investment saved 25.61 million yuan; the construction period is greatly shortened; The ammonia consumption is reduced from 630kg to 600kg, the power consumption is reduced from 180kwh to 140kwh, and the steam consumption is reduced from 1.67 tons to 1.55 tons. It is better than the design index and the production cost is greatly reduced. At the same time, the urea product quality is improved. It has been sold to 18 provinces and cities nationwide and has become a popular brand-name product in the country. It has optimized the management of urea production operations and enabled the discharge of “three wastes†to meet the standards and protect the environment. After the urea plant was successfully put into operation, it achieved safe, stable long-term, full-load and economic operation, which created significant economic and social benefits for Meifeng.
The outstanding advantages of this project are investment, short construction period, quick results, and broad application prospects.
1. Change the pre-distillation process to pre-separation--pre-distillation process, improve the capacity of one-stage decomposition, not only improve the CO2 conversion rate, but also save steam consumption;
2. Improve the internal structure of the urea synthesis tower, adopting a new high-efficiency tray technology to reduce back mixing and increase production capacity;
3. For the heart device of the urea plant--the suction tower improves its gas distribution structure, lengthens the bubbling section and separates the space, and adopts the new DL tray to improve the production efficiency and solve the heat balance;
4. The urea granulation system increases the circulating fluidized bed and the vibrating screen, which improves the yield quality and eliminates pollution;
5. Change the circulating water to use the high lift pump to select the water supply of different lift pumps according to the actual height of the user, saving power consumption;
6. The power-changing type III instrument is an advanced DCS distributed control system, which realizes the optimization of operation management;
7. Improve the structure of one sub-tower and two-tower to increase the feed hole diameter of the lower sub-column, change the diameter of the large bi-tower, increase the height of the packing and increase the outlet pipe, stabilize the operation and reduce the ammonia consumption;
8. The second-stage evaporative heater tube plate is fixed-type telescopic structure to avoid the cracking of the opening and stopping, which affects the product quality;
9. Change the second stage evaporative gas with ammonia cold water for water cooling, reduce the ice load, save electricity consumption. 0. According to the need of expansion of production capacity, the second regulator, the second cooler, the first and second evaporators, ammonia Technical recovery in recycling, tail suction system, deep hydrolysis, etc., improved operating conditions, and achieved "three wastes" discharge standards.
In the technical transformation of the urea plant, due to a series of technological innovations, the company's urea plant capacity has achieved extraordinary growth, reaching 200,000 tons / year; fixed assets investment saved 25.61 million yuan; the construction period is greatly shortened; The ammonia consumption is reduced from 630kg to 600kg, the power consumption is reduced from 180kwh to 140kwh, and the steam consumption is reduced from 1.67 tons to 1.55 tons. It is better than the design index and the production cost is greatly reduced. At the same time, the urea product quality is improved. It has been sold to 18 provinces and cities nationwide and has become a popular brand-name product in the country. It has optimized the management of urea production operations and enabled the discharge of “three wastes†to meet the standards and protect the environment. After the urea plant was successfully put into operation, it achieved safe, stable long-term, full-load and economic operation, which created significant economic and social benefits for Meifeng.
The outstanding advantages of this project are investment, short construction period, quick results, and broad application prospects.
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