CN103757141A - Improved clarification process for manufacturing sugar by sulfurous method - Google Patents
Improved clarification process for manufacturing sugar by sulfurous method Download PDFInfo
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- CN103757141A CN103757141A CN201410006088.8A CN201410006088A CN103757141A CN 103757141 A CN103757141 A CN 103757141A CN 201410006088 A CN201410006088 A CN 201410006088A CN 103757141 A CN103757141 A CN 103757141A
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Abstract
The invention provides an improved clarification process for manufacturing sugar by a sulfurous method. The clarification process comprises the steps of adding an infrared gas analyzer to the sulfitation procedure of an existing sugar manufacturing clarification production line, monitoring the concentration of the sulfur dioxide gas in a sulfur gas pipeline on line in real time, and controlling the sulfitation intensity of neutralizing juice by adjusting the concentration of the sulfur dioxide gas in the sulfur gas pipeline in advance. Compared with the method for controlling corresponding production flows by manually measuring the sulfitation intensity, the improved method has the beneficial effects that the accurate sulfitation intensity value can be timely and effectively obtained, and inaccuracy of artificial operation can be avoided; meanwhile, the adaptation relation between sulfur dioxide and the sulfitation intensity can be timely and quickly mastered through online real-time monitoring and can play roles in guiding and predicting actual production.
Description
Technical field
The present invention relates to sulfurous method sugar refining field, be specifically related to a kind of improved sulfurous method clarification process of sugar production.
Background technology
Sugar refinery, Guangxi mainly adopts sulfitation process craft to carry out cane sugar manufacture at present, and the subject matter that affects the white sugar quality of sulfurous method production is effective control of colour and sulphur content.The height of colour and sulphur content has important contacting with intensity of sulfitation.In sulfurous method production process, sulfurous gas is indispensable raw material, and sulfurous gas plays an important role in clarification and decolorization.Sugar refinery of domestic sulfurous method must be used sulfurous gas as the finings of production process when actual production white sugar, sulfurous gas not only can play the effect that sugarcane juice is bleached, can also effectively reduce the formation of new pigment in white sugar when storage, the stable of white sugar colour played the important and pivotal role.Sulfur dioxide concentration is too high, can cause the rising of intensity of sulfitation, thereby causes the sulphur content in white sugar product to exceed standard, and sulfur dioxide concentration is too low, can cause the decline of intensity of sulfitation, and decolouring all cannot arrive expection with the effect of clarification.So the height of sulfur dioxide concentration has directly determined the height of intensity of sulfitation, affect the quality of final white sugar.
Most domestic sulfitation sugar mill is not directly measured the concentration of sulfur dioxide gas in sulphur feed channel aborning at present, mainly by the method for labor measurement intensity of sulfitation, controls corresponding Production Flow Chart.This mode not only exists the inaccuracy of manual operation, also cannot grasp quickly the conformity relation between sulfurous gas and intensity of sulfitation simultaneously, more because the hysteresis quality of operation cannot play the effect of instructing with precognition to actual production.Small part sulfitation sugar mill adopts the intensity of sulfitation of Instrument measuring defeco-sulfitated juice, but due to complicated operation and the unstable of instrument, also cannot in time, effectively draw intensity of sulfitation numerical value accurately.
The doctrine of prior art makes those skilled in the art only expect that the intensity of sulfitation evaluation according to final makes the quality of white sugar, and do not expect by indirectly detecting the concentration of SO 2 gas in sulphur feed channel, can set up associated between sulfur dioxide concentration and intensity of sulfitation, thereby also can evaluate the quality of white sugar.
The present inventor is by a large amount of detection sign and comparing, concentration of SO 2 gas in sulphur feed channel and the associated graphic between intensity of sulfitation have been set up in research, thereby can utilize the real time data that existing infrared gas analyzer is very convenient, sulfur dioxide concentration detected fast and accurately, indirectly grasped the intensity of sulfitation of sugar refining technology, can instruct in time, adjust production, ensure the white sugar quality of producing, thereby completed the present invention.
Summary of the invention
The doctrine that the object of the invention is to overcome prior art is with not enough, a kind of improved sulfurous method clarification process of sugar production is provided, pass through infrared gas analyzer, the concentration of sulfur dioxide gas in on-line real time monitoring sulphur feed channel, by the adjustment in advance of the concentration of SO 2 gas in sulphur feed channel, control the height of defeco-sulfitated juice intensity of sulfitation.
For realizing above object of the present invention, the present invention adopts following technical scheme:
A kind of improved sulfurous method clarification process of sugar production, the stove drying operation that is included in existing sugar clarification production line increases infrared gas analyzer, the concentration of sulfur dioxide gas in on-line real time monitoring sulphur feed channel, by the adjustment in advance of the concentration of SO 2 gas in sulphur feed channel, control the height of defeco-sulfitated juice intensity of sulfitation.
In a preferred embodiment, also comprise Controlling System, described Controlling System is connected with sulfurous gas feed mechanism with infrared gas analyzer respectively, according to monitoring data signal feedback, and the concentration of SO 2 gas in chain adjusting sulphur feed channel.
Wherein, described infrared gas analyzer is novel NDIR gas analyzer.
Wherein, described infrared gas analyzer first carries out nitrogen Zero calibration before using.
Wherein, after described infrared gas analyzer Zero calibration, then concentration known standard sulfur dioxide gas is returned to mark, the accuracy of detecting instrument.
Wherein, be marked on for described time under 60 ℃ of conditions and carry out, detect the sulfur dioxide gas of 6% concentration, optimum flow is 0.4L/min～0.5L/min; Detect the sulfur dioxide gas of 12% concentration, optimum flow is 0.5L/min; Detect the sulfur dioxide gas of 18% concentration, optimum flow is 0.6L/min.
Wherein, described infrared gas analyzer is also connected with condenser system, air compressor pump; In sulphur feed channel, sulfur dioxide gas is after condenser system condensation, measures the temperature of sulphur gas after condensation, and by air compressor pump, adjust flux control valve is to corresponding suitable sulphur airshed at this temperature, and by infrared gas analyzer Real-Time Monitoring sulphur gas concentration.
Adopt improvement technique of the present invention, adopt novel NDIR gas analyzer to measure real-time, quickly and accurately the concentration of sulfur dioxide gas in the sulphur feed channel of sulfitation sugar mill, by the adjustment in advance of the concentration of SO 2 gas in sulphur feed channel, control the height of the intensity of sulfitation of defeco-sulfitated juice.
Adopt improvement technique of the present invention, adopt the concentration of novel NDIR gas analyzer energy the real time measure sugar refinery sulfur dioxide gas, for sugar refinery, control white sugar colour, reducing white sugar sulphur content provides a trim point.When controlling sulphur content, also can improve the productive rate of first sugar, simultaneously, the accurate understanding of concentration of SO 2 gas, rationally controls, and can effectively reduce the waste of sugar refinery on sulphur starting material, cost-saving, replace Traditional Man and measure the mode of intensity of sulfitation, for production scheduling provides Data support accurately, thereby in the level of management of sugar refinery, reach a new height.
Adopt improvement technique of the present invention, the use of novel NDIR gas analyzer can improve white sugar quality for sulfitation sugar mill with popularization, reduce to produce and consume, react timely current production status, actual production is played to actively useful contribution, for sulfitation sugar mill brings larger economic benefit, environmental benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is the improved sulfurous method clarification process of sugar production of the present invention schematic flow sheet.
Fig. 2 is another embodiment schematic flow sheet of the improved sulfurous method clarification process of sugar production of the present invention.
Fig. 3 is that in self-dissolving formula sulphur-furnace, sulphur gas concentration contrasts figure with intensity of sulfitation numerical fluctuations.
Fig. 4 is that in Cheng Shi sulphur-furnace, sulphur gas concentration contrasts figure with intensity of sulfitation numerical fluctuations.
Fig. 5 is that in Yi Shi sulphur-furnace, sulphur gas concentration contrasts figure with intensity of sulfitation numerical fluctuations.
Embodiment
Below in conjunction with embodiment more specifically, the present invention is done to further expansion explanation, but it is pointed out that improved sulfurous method clarification process of sugar production of the present invention is not limited to this specific technical process.Obviously be understandable that for those skilled in the art, even if the following description content does not make any adjustments or revises, also can be directly applied in these unspecified other technical process.
As shown in Figure 1, cigarette sulfuric acid process clarification process of sugar production flow process is for to pass through successively pre-ash, once heating, Sulphitation and Neutralization, second-heating, secondary Sulphitation and Neutralization, precipitation step by sucrose mixing juice.The present invention makes improvement on this basis, by the stove drying operation at existing sugar clarification production line, increase infrared gas analyzer, the concentration of sulfur dioxide gas in on-line real time monitoring sulphur feed channel, by the adjustment in advance of the concentration of SO 2 gas in sulphur feed channel, control the height of defeco-sulfitated juice intensity of sulfitation, for sugar refinery, control white sugar colour, reducing white sugar sulphur content provides a trim point.Improvement of the present invention is to increase online sulfurous gas infrared gas analyzer, other pre-ash, once heating, Sulphitation and Neutralization, second-heating, secondary Sulphitation and Neutralization, sedimentation operation are prior art, the corresponding operating of prior art and processing condition all can be included the present invention in, this is also well-known to those skilled in the art, does not repeat them here.
On the contrary, in prior art, only expect instructing production by detecting intensity of sulfitation, control the quality of white sugar, but intensity of sulfitation, generally by iodometric titrationiodimetry titration, is specifically managed the measuring method of intensity of sulfitation in unified analytical procedure > > with reference to < < cane sugar manufacture chemistry.The mensuration of intensity of sulfitation does not have simple and efficient method, only manually time-and-motion study, complex operation and easily produce error, detected result is with very large hysteresis quality simultaneously, often can not instruct in time production, regulate intensity of sulfitation, thereby the white sugar quality of producing cannot ensure, affects productivity effect.The doctrine of prior art, make sulfurous method clarification process of sugar production have very large deficiency, but according to improvement technique of the present invention, by detecting sulfur dioxide concentration, can set up the associated of sulfur dioxide concentration and intensity of sulfitation, thereby by common infrared gas analyzer, obtain very like a cork detected result, make to adjust in real time production, instruct and produce.
As shown in Figure 2, by the stove drying operation at sugar clarification production line, increase infrared gas analyzer and Controlling System, described Controlling System is connected with sulfurous gas feed mechanism with infrared gas analyzer respectively, the concentration of sulfur dioxide gas in on-line real time monitoring sulphur feed channel, and according to monitoring data signal feedback, concentration of SO 2 gas in chain adjusting sulphur feed channel is controlled the height of defeco-sulfitated juice intensity of sulfitation, for sugar refinery, control white sugar colour, reducing white sugar sulphur content provides a trim point.Described Controlling System can realize by the chain control of PLC, according to this, improves technique, can adjust very simply, in real time sulfur dioxide concentration, controls intensity of sulfitation in scope preferably, thereby scientifically instructs and produce, and ensures the quality of white sugar.
Described infrared gas analyzer can be novel NDIR gas analyzer, the Model418 twin-beam NDIR gas analyzer of Britain SIGNAL company for example, but be not limited to this.Its principle of work is that based target gas has selectivity absorption to infrared rays, and its degree of absorption depends on the concentration of tested gas.This analytical instrument can be analyzed one or more gas ingredients simultaneously.The major parts of infrared gas analyzer has infrared source, air chamber, cuts halo, infrared detector, spectral filter etc.Before use, nitrogen Zero calibration that conventionally will be to novel NDIR gas analyzer, recycles novel NDIR gas analyzer concentration known standard sulfur dioxide gas is returned to mark, the accuracy of detecting instrument.It is pure nitrogen gas that Zero calibration requires atmospheric environment, and according to principle of instrument, the nitrogen that passes into instrument can not excite infrared light to absorb, and the concentration of SO 2 gas numerical value on therefore last instrument is shown as 0.00%.Return to be marked under 60 ℃ of conditions and carry out, through instrument detection volume concentration 6% standard sulfur dioxide gas, optimum flow is 0.4L/min～0.5L/min, and gas concentration measuring value is 6.01%; Through instrument detection volume concentration 12% standard sulfur dioxide gas, optimum flow is 0.5L/min, and Instrument measuring value is 12.05%; Detection volume concentration 18% sulfur dioxide gas, optimum flow is 0.6L/min, gas concentration measuring value is 18.01%.
The operation steps that infrared gas analyzer is measured sugar refinery sulphur gas concentration is that sulfur dioxide gas in sulphur feed channel is after condenser system condensation, the roughly temperature of mensuration sulphur gas after condensation, for example 60 ℃, pass through air compressor pump, adjust flux control valve, modulates suitable sulphur airshed corresponding at this temperature, utilizes the real time data of NDIR gas analyzer, record instantaneous sulphur gas concentration, the sulphur gas change in concentration in observation for some time.
The present inventor utilizes novel NDIR gas analyzer, and concentration of SO 2 gas in the sulphur feed channel after three kinds of no sulphur-furnaces burnings is detected, and in conjunction with the intensity of sulfitation numerical value of labor measurement, carries out association.The fluctuation of the concentration of SO 2 gas that the fluctuation stapling instrument of discovery intensity of sulfitation numerical value is measured, and set up relevant associated graphic.
The mensuration of sulphur gas concentration in embodiment 1 self-dissolving formula sulphur-furnace
In sulfurous method clarification process of sugar production, in the self-dissolving formula sulphur-furnace of the novel NDIR gas analyzer monitoring of employing GXH-3011N, the intensity of sulfitation numerical value of sulphur gas concentration and labor measurement is as shown in table 1.
Table 1 sulphur gas concentration and intensity of sulfitation numerical value
In table 1, sulphur gas concentration data is mean value ± undulating quantity, in its self-dissolving formula sulphur-furnace, sulphur gas concentration contrasts figure as shown in Figure 3 with intensity of sulfitation numerical fluctuations, visible by the detection of concentration of SO 2 gas after utilizing infrared spectrum analyser to burning in self-dissolving formula sulphur-furnace, result and the fluctuation of intensity of sulfitation value coincide.
The mensuration of sulphur gas concentration in embodiment 2 Cheng Shi sulphur-furnaces
In sulfurous method clarification process of sugar production, in the Cheng Shi sulphur-furnace of the novel NDIR gas analyzer monitoring of employing GXH-3011N, the intensity of sulfitation numerical value of sulphur gas concentration and labor measurement is as shown in table 2.
Table 2 sulphur gas concentration and intensity of sulfitation numerical value
In table 2, sulphur gas concentration data is mean value ± undulating quantity, in its Cheng Shi sulphur-furnace, sulphur gas concentration contrasts figure as shown in Figure 4 with intensity of sulfitation numerical fluctuations, visible by the detection of concentration of SO 2 gas after utilizing infrared spectrum analyser to burning in Cheng Shi sulphur-furnace, result and the fluctuation of intensity of sulfitation value coincide.
The mensuration of sulphur gas concentration in embodiment 3 Yi Shi sulphur-furnaces
In sulfurous method clarification process of sugar production, in the Yi Shi sulphur-furnace of the novel NDIR gas analyzer monitoring of employing GXH-3011N, the intensity of sulfitation numerical value of sulphur gas concentration and labor measurement is as shown in table 3.
Table 3 sulphur gas concentration and intensity of sulfitation numerical value
In table 3, sulphur gas concentration data is mean value ± undulating quantity, in its Yi Shi sulphur-furnace, sulphur gas concentration contrasts figure as shown in Figure 5 with intensity of sulfitation numerical fluctuations, visible by utilizing the detection of concentration of SO 2 gas after burning in infrared spectrum analyser Dui Yishi sulphur-furnace, result and the fluctuation of intensity of sulfitation value coincide.
To sum up, by the detection of concentration of SO 2 gas after utilizing infrared spectrum analyser to three kinds of sugar refinery sulphur-furnace burnings, result and the fluctuation of intensity of sulfitation value coincide, as can be seen here, the concentration of SO 2 gas that infrared gas analyzer can be applied to sugar refinery detects, and measurement result is accurately stable.And associated by what set up between concentration of SO 2 gas and sulphuring intensity, can be by regulating in advance concentration of SO 2 gas to control sulphuring intensity at optimum level, thus regulate in real time production technique.Adopt improvement sulfurous method clarification process of sugar production of the present invention, can produce by scientific guidance, realize largest production benefit.
Although above the specific embodiment of the present invention has been given to describe in detail and explanation; but what should indicate is; we can carry out various equivalences to above-mentioned embodiment according to conception of the present invention and change and revise; when its function producing does not exceed spiritual that specification sheets and accompanying drawing contain yet, all should be within protection scope of the present invention.
Claims (7)
1. an improved sulfurous method clarification process of sugar production, the stove drying operation that is included in existing sugar clarification production line increases infrared gas analyzer, the concentration of sulfur dioxide gas in on-line real time monitoring sulphur feed channel, by the adjustment in advance of the concentration of SO 2 gas in sulphur feed channel, control the height of defeco-sulfitated juice intensity of sulfitation.
2. improved sulfurous method clarification process of sugar production according to claim 1, characterized by further comprising Controlling System, Controlling System is connected with sulfurous gas feed control mechanism with infrared gas analyzer respectively, according to monitoring data signal feedback, the concentration of SO 2 gas in chain adjusting sulphur feed channel.
3. improved sulfurous method clarification process of sugar production according to claim 1 and 2, is characterized in that described infrared gas analyzer is novel NDIR gas analyzer.
4. improved sulfurous method clarification process of sugar production according to claim 3, is characterized in that first carrying out nitrogen Zero calibration before described infrared gas analyzer uses.
5. improved sulfurous method clarification process of sugar production according to claim 4, is characterized in that after described infrared gas analyzer Zero calibration, then concentration known standard sulfur dioxide gas is returned to mark, the accuracy of detecting instrument.
6. improved sulfurous method clarification process of sugar production according to claim 5, is characterized in that being marked under 60 ℃ of conditions for described time and carries out, and detects the sulfur dioxide gas of 6% concentration, and optimum flow is 0.4L/min～0.5L/min; Detect the sulfur dioxide gas of 12% concentration, optimum flow is 0.5L/min; Detect the sulfur dioxide gas of 18% concentration, optimum flow is 0.6L/min.
7. improved sulfurous method clarification process of sugar production according to claim 6, is characterized in that described infrared gas analyzer is also connected with condenser system, air compressor pump; In sulphur feed channel, sulfur dioxide gas is after condenser system condensation, measures the temperature of sulphur gas after condensation, and by air compressor pump, adjust flux control valve is to corresponding suitable sulphur airshed at this temperature, and by infrared gas analyzer Real-Time Monitoring sulphur gas concentration.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101153863A (en) * | 2007-10-22 | 2008-04-02 | 长沙开元仪器有限公司 | Full-sulfur infrared absorption method for detecting substance with high sulfur content |
| CN101587068A (en) * | 2009-05-27 | 2009-11-25 | 陈小英 | Multi-sensor gas analyzer |
| CN102824272A (en) * | 2012-09-07 | 2012-12-19 | 天水长城高压电器元件厂 | Automatic quick fumigating, drying and processing complete equipment for traditional Chinese herbs |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101153863A (en) * | 2007-10-22 | 2008-04-02 | 长沙开元仪器有限公司 | Full-sulfur infrared absorption method for detecting substance with high sulfur content |
| CN101587068A (en) * | 2009-05-27 | 2009-11-25 | 陈小英 | Multi-sensor gas analyzer |
| CN102824272A (en) * | 2012-09-07 | 2012-12-19 | 天水长城高压电器元件厂 | Automatic quick fumigating, drying and processing complete equipment for traditional Chinese herbs |
Non-Patent Citations (1)
| Title |
|---|
| 霍汉镇: "白糖残留二氧化硫问题", 《广西蔗糖》 * |
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