Diammonium phosphate tail gas scrubber pH measuring device

Abstract

The invention belongs to the technical field of diammonium phosphate tail gas washing and particularly relates to a diammonium phosphate tail gas scrubber pH measuring device comprising a pipe A led out of a circulating pipe, a monitoring tank and a mixer; the pipe A is connected with the monitoring tank, the monitoring tank is connected with the mixer through a pipe B, and the mixer is connectedwith an outlet A at the lower part of a scrubbing tower through a pipe C; a pipe D is led out of the top of the mixer and is connected with an outlet B at the lower part of the scrubbing tower; and apH meter is arranged above the monitoring tank. According to the device in the invention, pH monitoring and tail gas washing are combined into a whole so as to form an internal circulation, such thatnot only the problem of secondary environmental pollution caused by emission of a pH measurement washing liquid is solved, but also the washing liquid in the pipeline can be fully circulated, therebybeing not easy for blockage to happen, reducing the workload of pipeline cleaning, and improving the stability and accuracy of the pH measured value.

Description

technical field [0001] The invention belongs to the technical field of diammonium phosphate tail gas scrubber, in particular to a pH measuring device for a diammonium phosphate tail gas scrubber. Background technique [0002] Diammonium phosphate (DAP) is one of the most widely used high-concentration phosphoric acid compound fertilizers in my country, with a world output of 2500×10 4 More than t, my country's annual productivity exceeds 300×10 4 t. A large amount of solid waste phosphogypsum and atmospheric emissions will be generated during the production of DAP. According to relevant statistics, each ton of DAP product will produce 2-2.5t of solid waste phosphogypsum and 4000-6000m of atmospheric emissions. 3 , causing serious environmental and air pollution; therefore, the ammonium phosphate industry has become one of the industries that are particularly concerned in the field of clean production in my country. Tail gas scrubbing is the main process to control air pol...

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Problems solved by technology

Although this method can play a role in monitoring, it has the following disadvantages: First, because the drainage tube is too small, it is easy to be blocked by impurities contained in the washing liquid. Once blocked, it needs to be cleaned manually, and the cleaning is difficult, increasing the Second, because the drainage tube is too small, the washing liquid is not very uniform and sufficient, and the measured value is not very stable and accurate; third, because the washing process is continuous, the washing liquid in the drainage tube is also continuous, and the washing liquid After a short stay in the monitoring tank, it is discharged to the accident tank, which is likely to cause secondary environmental pollution. This is also the reason why the drainage tube should not be too large

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