Preliming reactor and method

Abstract

The invention provides a preliming reactor, which comprises a cylinder, a juice inlet pipe, a juice outlet pipe, a stirring device, a pH control device, a flow control device, a phosphoric acid adder and a variable-frequency juice outlet pump; the variable-frequency juice outlet pump is communicated with the cylinder through the juice outlet pipe; the pH control device is used for detecting and controlling the pH of cane juice at the juice inlet pipe; the flow control device is used for detecting the flow information of the juice outlet pipe, and controlling the operating speed of the variable-frequency juice outlet pump according to the flow information, thus controlling output flow; and the phosphoric acid adder is used for adding phosphoric acid into the bottom of the cylinder or the juice outlet pipe. The invention further provides a preliming method by utilizing the preliming reactor. According to the preliming reactor and method, the large emergent flow change cannot occur in the follow-up procedures through the flow control of the preliming reactor, the stability of the follow-up procedures can be guaranteed, and further the output and quality of cane sugar can be guaranteed.

Description

technical field [0001] The invention relates to the field of sugar cane sugar making process equipment, in particular to a preash reactor and a method. Background technique [0002] my country's cane sugar factories mostly use the sulfite clarification process to produce white granulated sugar for direct consumption. In the production control of the sulfite clarification process, the stability of the flow rate and pH value of the pre-ash cane juice has an important impact on the process control of the subsequent production links. It is directly related to production indicators such as product quality and sugar recovery. [0003] The existing technology balances the amount of cane squeezed per hour by installing automatic control on the press machine. However, due to the different types of sugarcane and storage time, the amount of cane juice squeezed out still fluctuates greatly, and the instantaneous flow rate fluctuations usually reach 15-20%. , Some sugar factories that ha...

AI Technical Summary

Problems solved by technology

[0005] The addition ratio of phosphoric acid in pre-ash has a great influence on the clarification efficiency. The addition of phosphoric acid in the prior art adopts the manual adding method of quantitative hourly, without considering the flow rate of sugarcane juice, which makes the pH of pre-ash sugarcane juice change greatly, which affects the quality of subsequent processes. Sulfur fumigation neutralizes the control and stability of pH value

On the setting of phosphoric acid addition point, prior art sugarcane juice has just added phosphoric acid before entering the mixed juice box, causing the pH value of the cane juice in the mixed juice box to be reduced to the neutral range of 6.8-7.2, because the cane juice at this time The temperature of the juice is about 40°C, which is very suitable for the rapid reproduction of microorganisms; in addition, the sugarcane juice contains a lot of silt and bagasse, which are easy to deposit in the mixed juice tank, and the microorganisms in the tank reproduce very seriously, resulting in obvious sugar loss.

[0006] In addition, the mixed juice tank of the prior art is a square box without a stirring device, and the mixing reaction effect between sugarcane juice, phosphoric acid, and lime milk is not good. In addition, when the sugarcane juice is still, mud sand and sugarcane chaff are easily deposited in dead corners, and microorganisms Breeding produces cane rice, which is detrimental to product quality and sugar recovery

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