A control device for agricultural monoammonium phosphate production system
A technology of production system and control device, applied in ammonium orthophosphate fertilizer, phosphate, phosphorus oxyacid, etc., can solve the problems of control accuracy and timeliness error, low ammonia reuse efficiency, etc., and achieve improved reuse rate Effect
Active Publication Date: 2022-04-29
嘉施利(荆州)化肥有限公司
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Problems solved by technology
[0003] Artificial control accuracy and timeliness will inevitably have large errors, and the reuse efficiency of ammonia gas is not high
Method used
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Embodiment Construction
[0018] Such as figure 1 As shown, the control device of a kind of agricultural monoammonium phosphate production system described in the present invention comprises: main body 20, and described main body 20 is provided with first air channel 21, second air channel 22 and MCU; Described MCU passes The first probe 24 detects the ammonia flow rate of the first airway 21, and the second probe 25 detects the ammonia flow rate of the second airway 22, according to the ammonia flow rate and the flow rate of the first airway 21 and the second airway 22 The difference outputs control signals to the steam generator 15 and / or the air pump M, respectively. The inlet end of the second air channel 22 is provided with a desiccant filler 23 .
[0019] The MCU makes a control judgment according to the following conditions:
[0020] When A is greater than 4m 3 / min, and C is greater than 1m 3 / min, the MCU controls the power of the steam generator 15 to increase by 8% and the power of the a...
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The invention discloses a control device for an agricultural monoammonium phosphate production system and relates to the field of production control. Aiming at the problem of low ammonia reuse efficiency in the prior art, a real-time detection of the ammonia gas flow rate in the round-trip pipeline of the ammonia gas recovery kettle is proposed, and a control judgment is made according to the conditions. It includes a first airway, a second airway and an MCU; the MCU detects the ammonia flow of the first airway through the first probe, and detects the ammonia flow of the second airway through the second probe, according to the first gas flow The ammonia gas flow rate and the flow difference in the channel and the second air channel output control signals to the steam generator and / or the air pump respectively. The advantage is that, based on the ammonia gas flow in the first airway and the second airway as the judgment basis, a closed control loop is formed among the reaction kettle, the ammonia gas tank and the ammonia gas recovery kettle. The control precision is improved and the timeliness of control is greatly improved, so that the reuse rate of ammonia can be effectively increased by 40%.
Description
technical field [0001] The invention relates to the field of production control, in particular to a control device for an agricultural monoammonium phosphate production system. Background technique [0002] The existing agricultural-grade monoammonium phosphate production system mainly includes a reaction kettle, an ammonia gas recovery kettle and a solid-liquid separator. The ammonia gas recovery kettle is provided with steam by a steam generator, so that the ammonia gas dissolved in water can be gasified and discharged again. The larger the steam, the more ammonia gas will be precipitated. The ammonia gas entering the reactor is determined by the output of the ammonia tank controlled by the air pump. Wet-process phosphoric acid and ammonia gas are fed into the reactor for reaction, and the reactants enter the solid-liquid separator to obtain finished products and other by-products. The ammonia reaction in the reactor cannot be completely sufficient, so part of the ammoni...
Claims
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IPC IPC(8): C01B25/28C05B7/00
CPCC01B25/28C05B7/00
Inventor 黄亦
Owner 嘉施利(荆州)化肥有限公司