4results about How to "Reduce recirculation air volume" patented technology

The invention discloses a self-adaptive ammonia synthesis control system and control method based on STM32, and relates to the technical field of ammonia synthesis. Ammonia synthesis equipment in the system is used for carrying out a synthesis reaction of ammonia gas; the analog quantity measurement module is used for collecting and processing analog quantity signals in ammonia synthesis equipment and sending the processed analog quantity signals to the control module; the control module is used for outputting a control signal based on an adaptive neural network PID (Proportion Integration Differentiation) algorithm according to the processed analog quantity signal and a set safety upper limit value of the analog quantity signal; the driving module is used for transmitting a control signal to the valve; the valve is used for controlling the circulating gas quantity and the gas output of the ammonia synthesis equipment; and the display interaction module is used for inputting a set temperature to the STM32 control system through the communication module, and is used for displaying current system state information. The control quality of the ammonia reaction process can be improved, and more accurate temperature control is realized.

The invention discloses a cement hot raw material desulfurization process and a desulfurization device. The desulfurization process comprises the following steps: (1) taking out a high-temperature solid hot raw material from a C5-grade cyclone blanking pipe; (2) mixing the taken-out high-temperature solid hot raw material with air flow for primary cooling; (3) carrying out gas-solid separation on the hot raw material mixed with the gas, and carrying out secondary cooling by using atomized water to obtain a low-temperature hot raw material; (4) metering the obtained low-temperature hot raw material, adding the low-temperature hot raw material into a digester, and carrying out digestion reaction on the low-temperature hot raw material and digestion water in the digester to generate calcium hydroxide; (5) conveying the digested material into a powder bin for temporary storage; and (6) metering the material temporarily stored in the powder bin, adding the material into a first air pipe from the C2 cyclone separator to the C1 cyclone separator, and carrying out desulfurization treatment. The process method provided by the invention has the advantages of small influence on a preheater system, low energy consumption, high desulfurization efficiency, small use amount of a desulfurizing agent and stable desulfurization effect, and can adapt to a working condition with relatively large SO2 concentration fluctuation.

A series-parallel process system for the hydrogenation of ethyl acetate to ethanol belongs to the technical field of ethyl acetate hydrogenation to ethanol production. The system comprises multiple subsystems connected in series or parallel. In each subsystem, the tube-side outlet of the feed heat exchanger is connected to the inlet of the vaporizer, and its outlet pipe is connected to the inlet of the reactor. The reactor outlet is connected to the shell-side inlet of the feed heat exchanger, and the shell-side outlet is connected to the separator. In this system, ethyl acetate enters the multi-stage reactors in parallel, while hydrogen and recirculation gas enter the multi-stage reactors in series. With the same hydrogen-to-ester ratio, the recirculation gas volume is reduced by more than half, significantly reducing the energy consumption of the recirculation unit. Simultaneous entry of ethyl acetate into the multi-stage reactors facilitates adjustment of reactor loads and synchronized catalyst aging. If a single-stage reactor or equipment fails or requires catalyst replacement, it can be shut down individually for troubleshooting while the other stage continues operation. This system enables large-scale production capacity.

The utility model discloses a synthetic recycle gas methanol washing purification recovery device, which is characterized in that the bottom of a synthetic tower is sequentially connected with an air cooler, a water cooler and a crude methanol separator through pipelines, the tower top of the crude methanol separator is connected with the middle lower part of a methanol washing tower through a pipeline, and the tower bottom is connected with a subsequent rectification unit; the top of the methanol washing tower is connected with a recycle gas compressor through a pipeline, and the recycle gas compressor is connected with a feed gas pipeline entering the synthesis tower through a pipeline. The device disclosed by the utility model realizes high-efficiency purification and recovery of methanol in synthetic recycle gas, and ensures long-period stable operation of the system.