CN101983754A - Wet desulphurization equipment for magnesium oxide - Google Patents
Wet desulphurization equipment for magnesium oxide Download PDFInfo
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- CN101983754A CN101983754A CN2010102376637A CN201010237663A CN101983754A CN 101983754 A CN101983754 A CN 101983754A CN 2010102376637 A CN2010102376637 A CN 2010102376637A CN 201010237663 A CN201010237663 A CN 201010237663A CN 101983754 A CN101983754 A CN 101983754A
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Abstract
The invention provides wet desulphurization equipment for magnesium oxide, which comprises a desulphurization tower, a cooling box, a crystallization vat and a filter, wherein, a pipeline circulating spray system is arranged in the desulphurization tower, a pipeline circulating spray system is arranged between the cooling box and the crystallization vat, and the two circulating spray systems are connected with a control valve through a pipeline; the pipeline of the pipeline circulating spray system of the desulphurization tower is equipped with a concentration detector for detecting concentration to realize open-close of the control valve so as to control open-close between the two pipeline circulating spray systems; and the lower part of the crystallization vat is connected to the filter through a pipeline, and the pipeline is also equipped with a control valve. By means of self-circulation between the two pipeline circulating spray systems, the production efficiency is improved, and the desulphurization efficiency of the whole equipment can be further controlled well by controlling open-close between the two pipeline circulating spray systems through concentration. The wet desulphurization equipment has high desulphurization efficiency, less investment cost, low operating cost and no secondary pollution.
Description
Technical field
The present invention relates to a kind of magnesia wet desulphurization equipment.
Background technology
Magnesia wet desulphurization technology is the sulfur removal technology that a kind of maturity is only second to the calcium method, the magnesia sulfur removal technology all has very many application achievements all over the world, wherein used more than 100 project in Japan, the power station in Taiwan 95% is to use magnesium oxide method, all used on the U.S., Germany and other places in addition, and the achievement of using has been arranged in China some areas at present, but also there are very big development space in quantity, scale and technical merit.
The magnesian reserves of China are very considerable, and present explored magnesia reserves are about 16,000,000,000 tons, account for global about 80% and best in quality.Its resource mainly is distributed in provinces such as Liaoning, Shandong, Sichuan, Hebei, and wherein Liaoning accounts for 84.7% of total amount, secondly is the Laizhou, Shandong, accounts for 10% of total amount, and other mainly is in the great river, Xingtai, Gan Luoyan Mount Tai, Sichuan, Hanyuan, Gansu Su Bei, not Gai etc. ground.Therefore magnesia can be applied to the desulphurization system of power plant fully as desulfurizing agent.
Sulfur method calcium method desulfurization commonly used, calcium hydroxide is not as magnesium hydroxide hydrolysis more thorough (solubility of calcium hydroxide is lower than magnesium hydroxide), aspect chemical reactivity much larger than calcium-based desulfurizing agents such as calcium oxide, calcium carbonate, therefore desulfuration efficiency is higher than the calcium method, can reach more than 95, and the desulfuration efficiency of limestone/gypsum method only reaches about 90～95%.
Because the active potent rate height of magnesia, so magnesia has its unique advantages as desulfurization itself, and comparing with the limestone/gypsum method at the power of the overall size of the size of the structural design on absorption tower, recycle slurry liquid measure, system, equipment can be corresponding less.Therefore the investment cost of whole desulphurization system can reduce more than 30% relatively.
The principal element of decision desulphurization system operating cost is public work energy consumptions such as the consumption of desulfurizing agent and water, electricity.Magnesian molecular weight is all little a lot of than calcium carbonate and calcium oxide, and magnesium be the required magnesia weight of divalent ion so unit desulfurization be reach effect same calcium carbonate 1/3rd, be 1/2nd of NaOH.Because the doctor solution internal circulating load less than its limestone/gypsum method, therefore can significantly reduce the circulating pump power consumption.Though magnesian price is higher than the price of calcium carbonate/calcium oxide, but the SO2 magnesia consumption that removes same weight is 40% of a calcium carbonate; Therefore magnesium oxide method sulfur removal technology operating cost is lower.
The desulfurization of magnesium method is that system the equipment scaling blockage problem can not take place with respect to the sharpest edges of calcium method, can the whole desulphurization system of assurance move safely and effectively, magnesium method pH value is controlled between 6.0～6.5 simultaneously, and the equipment etching problem has also obtained solution to a certain degree under this condition.Generally speaking, the security performance of magnesium method desulfurization in actual engineering can obtain strong guarantee.And because the key reaction product of magnesium method desulfurization is a magnesium sulfite, can carries out forced oxidation easily and generate magnesium sulfate, through concentrating, crystallization, purification generate epsom salt.Be industrial chemicals such as leather, papermaking or sell as the high-quality chemical fertilizer.The epsom salt molecular weight is more than magnesian six times, so yield is the initial magnesian six times of weight that drop into, if be able to purification processes, its income can offset with the input of raw materials of magnesium oxide.If add the sulfur dioxide charges for disposing pollutants of return, the magnesia wet desulfurizing process can reach leveling of income substantially.
And common limestone/gypsum wet desulfurizing process unavoidably can produce the inferior gypsum and the gypsum of inferior quality.Because Chinese gypsum resource is abundant and best in quality, so the outlet of the low desulfurated plaster of quality has a disconcerting prospect, even needs flower energetically with its landfill or abandon, and this also just exists secondary pollution problem.For the magnesia desulfur technology, because byproduct economic benefit height, operation enterprise generally can invest comparatively perfect reprocessing facility, can accomplish the waste water and dregs zero-emission substantially.This has just solved secondary pollution problem.
So based on foregoing, magnesium method desulfur technology and equipment are introduced into domestic, and carry out autonomous design.The present invention is exactly a part of equipment being carried out autonomous innovation.
Summary of the invention
Based on the problems referred to above, the invention provides a kind of magnesia wet desulphurization equipment.
The objective of the invention is to be achieved through the following technical solutions:
Magnesia wet desulphurization equipment, comprise desulfurizing tower, cooling casing, crystallizing tank and filter, be provided with pipeline circulated sprinkling system between desulfurizing tower self, cooling casing and the crystallizing tank, be connected with control valve by pipeline between two circulated sprinkling systems, the pipeline of the pipeline circulated sprinkling system of desulfurizing tower self is provided with concentration and detects meter, realize the switching of control valve by detection, thereby control two switchings between the pipeline circulated sprinkling system concentration; Bottom at crystallizing tank is connected to filter by pipeline, and also is provided with control valve on pipeline.
Self-loopa between two pipeline circulated sprinkling systems can improve the production efficiency of self, and by the switching between two pipeline circulated sprinkling systems of concentration control, the efficient of control entire equipment desulfurization that can be further good.This equipment desulfuration efficiency height, investment cost is few, and operating cost is low, non-secondary pollution.
Description of drawings
With embodiment the present invention is described in further detail with reference to the accompanying drawings below.
Fig. 1 is the structure chart of magnesia wet desulphurization equipment.
The specific embodiment
In the present embodiment, as shown in Figure 1, magnesia wet desulphurization equipment, comprise desulfurizing tower 1, cooling casing 2, crystallizing tank 3 and filter 4, be provided with pipeline circulated sprinkling system 5,6 between desulfurizing tower 1 self, cooling casing 2 and the crystallizing tank 3, be connected with control valve 7 by pipeline between two circulated sprinkling systems 5,6, the pipeline of the pipeline circulated sprinkling system 5 of desulfurizing tower 1 self is provided with concentration and detects meter, realize the switching of control valve by detection, thereby control two switchings between the pipeline circulated sprinkling system 5,6 concentration; Bottom at crystallizing tank 3 is connected to filter 4 by pipeline, and also is provided with control valve 7 on pipeline.
Self-loopa between two pipeline circulated sprinkling systems can improve the production efficiency of self, and by the switching between two pipeline circulated sprinkling systems of concentration control, the efficient of control entire equipment desulfurization that can be further good.This equipment desulfuration efficiency height, investment cost is few, and operating cost is low, non-secondary pollution.
Claims (2)
1. magnesia wet desulphurization equipment, comprise desulfurizing tower, cooling casing, crystallizing tank and filter, it is characterized in that, be provided with pipeline circulated sprinkling system between desulfurizing tower self, cooling casing and the crystallizing tank, be connected with control valve by pipeline between two circulated sprinkling systems, the pipeline of the pipeline circulated sprinkling system of desulfurizing tower self is provided with concentration and detects meter, realizes the switching of control valve by the detection to concentration, thereby controls two switchings between the pipeline circulated sprinkling system.
2. magnesia wet desulphurization equipment according to claim 1 is characterized in that, is connected to filter in the bottom of crystallizing tank by pipeline, and also is provided with control valve on pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102376637A CN101983754A (en) | 2010-07-27 | 2010-07-27 | Wet desulphurization equipment for magnesium oxide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102376637A CN101983754A (en) | 2010-07-27 | 2010-07-27 | Wet desulphurization equipment for magnesium oxide |
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| CN101983754A true CN101983754A (en) | 2011-03-09 |
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| CN2010102376637A Pending CN101983754A (en) | 2010-07-27 | 2010-07-27 | Wet desulphurization equipment for magnesium oxide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105268306A (en) * | 2015-11-23 | 2016-01-27 | 金川集团股份有限公司 | Low-concentration sulfur dioxide smelting off-gas desulphurization device and method |
-
2010
- 2010-07-27 CN CN2010102376637A patent/CN101983754A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105268306A (en) * | 2015-11-23 | 2016-01-27 | 金川集团股份有限公司 | Low-concentration sulfur dioxide smelting off-gas desulphurization device and method |
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Application publication date: 20110309 |