CN102000489A - Wet desulfurizer for thermal power plant and desulfurization method thereof - Google Patents
Wet desulfurizer for thermal power plant and desulfurization method thereof Download PDFInfo
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Abstract
The invention relates to a wet desulfurizer for a thermal power plant and a desulfurization method thereof, the thermal power plant comprises a desulfurization absorption tower, the desulfurization absorption tower is sequentially provided with saturated absorption solution of limestone, an absorption solution overflow pipe and a solution replenishing pipe on the side wall of the absorption tower, a flue gas inlet, an absorption solution spraying zone, a defogger and a flue gas outlet from bottom to top, and the technical key points are as follows: adipic acid is added in the saturated absorption solution, the ratio of the adipic acid to solute of the limestone in parts by weight is 0.2-0.3:100, the desulfurizer is pumped into a spraying layer via circulating pumps and sprayed out, then the countercurrent washing by sulfur-containing flue gas which enters into the desulfurization absorption tower via the flue gas inlet is carried out, sulfur is absorbed, and the flue gas passes through the defogger and is exhausted by the flue gas outlet. The wet desulfurizer for the thermal power plant and the desulfurization method thereof can not only lead the SO2 (sulfur dioxide) concentration in the emission of clean flue gas of the power plant to be up to the standard due to the change of coal type, but also reduce the number of the pumps in operation by changing the combination way of the circulating pumps under the premise of realizing low load and low concentration of the SO2 in raw flue gas, and further realize economic and energy-saving operation of a desulfurization system.
Description
Technical field
The present invention relates to heat-engine plant desulfurized technology field, specifically a kind of heat-engine plant wet desulfurizing agent and sulfur method thereof.
Background technology
Development in an all-round way along with China's flue gas desulfurization industrialization, lime stone gypsum wet sulfur removal technology is because its wide accommodation, technical maturity, desulfuration efficiency height, the desulfurizing agent source is abundant and price is lower, become the first-selected technology of China coal-burning power plant, at present, the localization rate of parts and components of desulphurization plant reaches more than 90%.
Yet, because the variation of domestic coal electricity supply-demand relationship, in the actual motion of power plant, be subjected to the restriction of coal and other factors, desulphurization system inlet flue gas amount and SO 2 from fume concentration often exceed design load, this has just caused the low and relevant performance parameter of desulphurization system actual efficiency not good, and the desulphurization system energy consumption is serious.
Recent years, domestic each power plant flue gas desulfurization facility that started on a large scale successively, but because ature of coal supply problem, the actual coal of power plant often has very big difference with the design ature of coal, power plant can't take to design the ature of coal operation, the ature of coal sulfur-bearing of piecing together everywhere alters a great deal, this has caused former SO 2 from fume fluctuation of concentration bigger, the desulphurization system fluctuation of service, sulfur dioxide concentration is crossed high desulfurization efficiency can significantly be lower than design load, the phenomenon of exceeding standard is arranged during sulfur dioxide (SO2) emissions, also cause desulfurizing byproduct gypsum bad simultaneously, the lime stone utilization rate is low.Power plant exceeds standard for fear of discharging, take to increase the method for lime stone supply, still can't resolve the energy consumption that the big problem of sulfur dioxide emissioning concentration has also increased system's operation simultaneously, reluctantly, the power plant that has has to select load limit operation, brings very big loss thus.
Existing wet desulfurizing process introduction
At present, domestic about fired power generating unit more than 95% has been equipped with wet desulfurization system, and the principle of wet desulfurizing process mainly is under the situation of having added fresh limestone, and the mixture of lime stone and water is delivered to spraying layer from slurries pond, absorption tower; The nozzle atomization of slurries on spraying layer becomes the droplet of certain diameter; Contact with the flue gas adverse current that rises in the absorption tower in the process that droplet falls, droplet is with the acid constituents in the absorption liquid, as SO
2, SO
3, HF and HCl remove; The clean flue gas that leaves absorption tower washing part flows through demister, and to remove droplets entrained, drop returns the absorption tower, and clean flue gas is directly discharged through chimney.The main technique of desulphurization system is as follows:
(1) mixes and adds lime stone and water saturation absorption liquid;
(2) absorb sulfur in smoke and reaction generation calcium sulfite;
(3) introduce force air oxidation calcium sulfite and generate gypsum;
(4) from absorption liquid, separate gypsum.
The flue gas of boiler enters the absorption tower through electric cleaner, air-introduced machine, booster fan, and washing desulphurization enters atmosphere after demister is removed fine drop after absorption tower outlet flue gas enters chimney via the desulfurization back-end ductwork.
Absorbent is by lime stone (CaCO
3) add an amount of water-soluble separating and be prepared from, according to the pH value and the former flue gas SO of slurries in the absorption tower
2Mass concentration, quantitative absorbent slurry is in circulating pump adds the absorption tower, the chemical reaction in the absorption tower mainly contains following process:
(1) absorption process
(2) oxidizing process
(3) N-process
Total chemical equation is in the absorption tower:
The gypsum slurries on absorption tower is sent into gypsum waterpower rotational flow station by the gypsum excavationg pump, and the gypsum slurries after concentrating is collected into the gypsum slurries case, is pumped to vacuum belt dewaterer with gypsum slurries.The gypsum slurries that enters vacuum belt dewaterer, is sent into gypsum by belt conveyor and is deposited as ready between storing less than 10% through processed rear surface moisture content, can be for comprehensive utilization.The overflowing liquid of gypsum cyclone after spill box is collected, is delivered to corresponding waste-water vortex device, the overflowing liquid of waste-water vortex device, and its underflow returns the absorption tower and recycles.
Consider desulphurization system transformation cost height and the problem of transforming the space difficulty, the design of desulphurization system is difficult to change, and in order to improve desulfuration efficiency, adding sulfur-removing additives then is a kind of efficient ways.
Summary of the invention
The purpose of this invention is to provide a kind of heat-engine plant wet desulfurizing agent and sulfur method thereof that can under different working conditions, improve system's desulfuration efficiency.Promptly improve desulfuration efficiency by organic acid, after the ature of coal of prevention owing to the high sulphur content of employing, SO
2Still can qualified discharge.
The object of the present invention is achieved like this: described heat-engine plant wet desulfurizing agent, it includes: the lime stone and the water saturation absorption liquid that are in saturation state or hypersaturated state, it is characterized in that: adding in saturated absorption liquid has adipic acid, and the adipic acid in this saturated absorption liquid and the solute ratio of weight and number of lime stone are 0.2-0.3: 100.
Above-mentioned lime stone purity is more than 90%, and size distribution is 90% by 250 mesh sieve; Adipic acid purity is more than 99.7%, white powder.
The sulfur method of wet desulphurization agent of the present invention, it includes a desulfuration absorbing tower, this desulfuration absorbing tower is disposed with from bottom to top: the lime stone and the water saturation absorption liquid that are in saturation state or hypersaturated state, saturated absorption liquid overflow pipe and liquid supplementation pipe on the sidewall of absorption tower, smoke inlet, saturated absorption liquid spray district, exhanst gas outlet after demister and the desulfurization, it is characterized in that: adding in saturated absorption liquid has adipic acid, the adipic acid in this saturated absorption liquid and the solute ratio of weight and number of lime stone are 0.2-0.3: 100, and become desulfurizing agent; Desulfurizing agent pumps into spraying layer and vaporific ejection through circulating pump, this moment with enter via smoke inlet desulfuration absorbing tower contain the sulfur dioxide flue gas countercurrent washing after, after the sulfur dioxide absorption, this flue gas is discharged via the exhanst gas outlet at demister and desulfuration absorbing tower top, again by smoke stack emission in atmosphere;
Desulfurizing agent absorbs sulfur in smoke and reaction generates calcium sulfite, introduces force air oxidation calcium sulfite and generates gypsum, separates gypsum from saturated absorption liquid;
Saturated absorption liquid serviceability temperature scope is 50-65 ℃.
Described saturated absorption liquid overflow pipe and liquid supplementation pipe all feed a desulfuration absorbing tower melt pit circulatory pool that has an agitator, the adding of adipic acid or to add be to add by absorption tower melt pit circulatory pool to be in saturation state or hypersaturated state lime stone and the water saturation absorption liquid.
The mechanism of action of adipic acid:
With the CaCO that contains adipic acid
3Solution absorbs SO
2Reaction the time, mainly by following key reaction:
Wherein: H
2A---adipic acid;
AH
-, A
2-----the ion that the adipic acid hydrolysis produces.
Aq, s, l---represent gas phase respectively, solid phase, liquid phase.
Entire reaction course relates to solution-air, liquid-liquid, three alternate processes such as liquid-solid, and entire reaction course sees the following form:
Lime lime-gypsum method technology adipic acid intensified lime stone of the present invention and SO
2Mechanism of mass transfer
By finding out in the last table, in gas phase surface and liquid film, the SO of dissolving
2React the H that dissociates out with water by formula (1)
+At liquid film and liquid phase main body border, AH
-With H
+Generate H by formula (2) reaction
2A (aq) makes H
+Be passed to the liquid phase main body, [H in the liquid film
+] reduction of concentration quickened formula (1) balance and moved right, thereby promoted SO
2Dissolving, and then improved desulfuration efficiency; In solid phase and liquid film, the CO of formula (6) dissolving
3 2-H with formula (3) disassociation
+Generate HCO by formula (5) reaction
3 -At liquid phase main body, H
+With HCO
3 -Generate CO by formula (4) reaction
2And H
2O, [HCO in the liquid phase main body
3 -] reduction of concentration, make formula (5) and formula (6) balance move right, thereby promoted CaCO
3Dissolving.
By above analysis as can be known, the existence of adipic acid has been strengthened by the transmission of gas phase to solid phase, has promoted SO simultaneously
2And CaCO
3Dissolving, quickened SO
2Chemical absorbing, therefore improved desulfuration efficiency.
If adipic acid and lime stone proportioning are low excessively: adipic acid use quantity not sufficient, the H that formula (2) reaction generates
2A (aq) reduces, and adipic acid is strengthened H
+The effect of transmitting reduces, and the effect that limestone activity is improved is variation also.
If adipic acid and lime stone proportioning are too high: the consumption of adipic acid is too high, at this moment, adipic acid is compared the required consumption of limestone activity raising still residue, not only uneconomical, and because adipic acid belongs to weak acid, a large amount of existence of adipic acid can reduce slurry pH value, thereby desulfuration efficiency is played negative effect.
Advantage of the present invention is:
The present invention has particularly carried out the wet desulfurization system adipic acid and has added research on the 600MW unit, obtained beyond thought desulfurized effect.
The present invention's research combines the laboratory and engineering site is used two parts, has analyzed the overall effect of adipic acid to desulphurization system multi-facetedly, and proposed brand-new desulphurization system energy-saving run prioritization scheme, has obviously improved the desulfuration efficiency of wet desulfurization system.
Desulfurizing agent of the present invention not only can be realized causing power plant at clean flue gas SO because coal changes
2The concentration qualified discharge is exempted the punishment that exceeds standard.Can also be implemented in underload and former flue gas SO
2Under the lower prerequisite of concentration, reduce pump operation quantity by changing the circulating pump compound mode, realize the economical and energy saving operation of desulphurization system, reduce station service power consumption rate, can save 1,000,000 the electricity charge every year, and good practical significance is arranged.And can avoid power plant's load limit operation, the loss that is brought because operational factor exceeds design load.Can improve the operating flexibility of system and flexibility, alleviation system's fouling and obstruction, the former flue gas SO of adaptation of fuel in addition
2The running wastage of the variation of the abrupt change of concentration, buffering slurry pH value, minimizing slurry circulating pump impeller etc.Therefore, application prospect is very wide.
Of the present invention also to have process simple, and original device is not had change, and operation and operating cost are low, advantage such as range of application is wide.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
To be described in further detail the present invention by example below, but following example only is the present invention's example wherein, the rights protection scope of not representing the present invention and being limited, the scope of the present invention is as the criterion with claims.
The specific embodiment
As shown in Figure 1, Fig. 1 is applied in desulfurization process sketch on No. two 600MW units of state electricity Kangping power plant for the present invention;
Among the figure 6 is desulfuration absorbing tower, this desulfuration absorbing tower 6 is disposed with from bottom to top: be in the lime stone of hypersaturated state and the supersaturation absorption liquid 601 of water, saturated absorption liquid overflow pipe on the sidewall of absorption tower and liquid supplementation pipe import and export 602, smoke inlet 603, saturated absorption liquid spray district 604, the exhanst gas outlet 606 after demister 605 and the desulfurization; Saturated absorption liquid overflow pipe and liquid supplementation pipe all feed a desulfuration absorbing tower melt pit circulatory pool 4 that has an agitator 5, the adding of adipic acid or to add be to add in the supersaturation absorption liquid that is in hypersaturated state lime stone and water by absorption tower melt pit circulatory pool, when supersaturation absorption liquid serviceability temperature scope is 50-65 ℃, the adipic acid in the supersaturation absorption liquid and the solute ratio of weight and number of lime stone are 0.2-0.3: 100, thus become desulfurizing agent.
Adopting lime stone supersaturation absorption liquid mainly is the input number of times that reduces lime stone relatively.
Among the figure 1 is smoke duster, and the flue gas that contains pollutant from boiler tail comes out carries out entering in the desulfuration absorbing tower through the middle part smoke inlet 603 of booster fan 2 from desulfuration absorbing tower 6 after the dust removal process through deduster 1 earlier; And desulfurizing agent pumps into saturated absorption liquid spraying layer 604 and vaporific ejection through circulating pump 7, this moment with enter via smoke inlet 603 desulfuration absorbing tower contain the sulfur dioxide flue gas countercurrent washing after, after the sulfur dioxide absorption, this flue gas is discharged via the exhanst gas outlet 606 at demister 605 and desulfuration absorbing tower top, is discharged in the atmosphere by chimney 8 again.
In addition, desulfurizing agent absorbs sulfur in smoke and reaction generates calcium sulfite, introduces force air oxidation calcium sulfite and generates gypsum, separates gypsum from saturated absorption liquid;
Slurries in the absorption tower are evacuated to spraying layer by slurry circulating pump and carry out the repetitive cycling utilization, and the effect of absorption tower district melt pit is after the fluid storage that the absorption tower overflow is got off, are extracted through pump by automatic interlock and carry out the recycling of lime stone slurry.Add adipic acid in this position, after adipic acid stirs into liquid by the agitator of melt pit, (the solute ratio of weight and number at Ta Nei and lime stone is 0.2-0.3: 100) to draw back the absorption tower via pump, and through the running without interruption of slurry circulating pump, thereby enter spraying layer by the reaction that contacts with flue gas of nozzle ejection fog-like liquid.
Dosing method: the chain automatic control of sump pump is adopted in adding of adipic acid, and the sump pump flow is 45m
3/ h.Adipic acid all adds first needs 4～5 hours.
Arbitrary way: after adding first, need to replenish the adipic acid of day-to-day loss.The same employing of replenishing of adipic acid adds to the mode of absorption tower melt pit, and every day in the same time adds 100 kilograms of adipic acids, and the time that adds needs 3～4 hours.
Above-mentioned lime stone purity is more than 90%, and size distribution is 90% by 250 mesh sieve; Adipic acid purity is more than 99.7%, white powder.
Direct effect of the present invention is to have improved the desulfuration efficiency of system under the different working conditions, and can realize has higher desulfuration efficiency under low pH, and the variation of available buffer slurries pH, and can reduce system's liquid-gas ratio, improves the lime stone utilization rate.
Under A, the different working condition, adipic acid is to the influence of desulfuration efficiency several forms of face as follows.
Comprehensive above several tables under former flue gas condition of difference and slurry circulating pump compound mode, can improve desulfuration efficiency 2%～5% by adding adipic acid as can be seen, and are especially very high at unit load, former flue gas SO
2Mass concentration reaches 3600mg/Nm
3During the left and right sides, can keep desulfuration efficiency about 95%, this is higher to working as the ature of coal sulfur-bearing, when former flue gas exceeds design load, and system's desulfuration efficiency and clean flue gas SO
2Qualified discharge provides guarantee, has good practical significance.
B, add adipic acid after, the situation of change of gypsum quality and lime stone utilization rate
The gypsum main component is analyzed contrast table before and after adding adipic acid
As can be seen from the above table, add adipic acid after, gypsum purity rises to 95.34% by 91.46%, has improved 3.88%.CaCO in the gypsum
3And CaSO
31/2H
2The mass fraction of O is by in various degree decline.Comprehensive each constituent analysis as can be known, the quality of gypsum has had bigger lifting.As calculated, add before and after the adipic acid, system's calcium sulfur ratio brings up to 1.002 by 1.034, and calcium sulfur ratio improves 3%.This explanation, add adipic acid after, the utilization rate of lime stone has improved 3%.
Under C, the different working condition, add desulphurization system slurry circulating pump optimization result behind the adipic acid
After adding adipic acid, improved the desulfuration efficiency of system, satisfied and kept the certain and clean flue gas SO of desulfuration efficiency
2Under the prerequisite of qualified discharge, optimize the combination of slurry circulating pump, realized the purpose of desulphurization system energy-saving run.Add before and after the adipic acid, the situation of change of slurry circulating pump compound mode contrast under the different working conditions of Kangping power plant and optimization front and back system liquid-gas ratio is the several tables of face as follows.
Add the slurry circulating pump compound mode and the liquid-gas ratio situation of change of adipic acid front and back Kangping power plant
As can be seen from the above table, add adipic acid after, variation has taken place in the compound mode of slurry circulating pump under the different working conditions.Under the same working condition, satisfying under the prerequisite of desulfuration efficiency, can reduce system's liquid-gas ratio, can save system's operation power consumption greatly by taking less slurry circulating pump or the mode of the pump of stopping using.When system is in higher load and during than underload, liquid-gas ratio can save 30% and 50% respectively, when unit load is (350～450) MW, add adipic acid before and after system's liquid-gas ratio do not change.
After adding adipic acid, the optimization of Kangping power plant slurry circulating pump compound mode the results are shown in following table.
Add the slurry circulating pump compound mode optimization result of Kangping power plant behind the adipic acid
As seen from the above table, at unit load greater than 450MW, former flue gas SO
2Concentration is (3400～3600) mg/Nm
3The time, adding adipic acid rear slurry circulating pump can be moved simultaneously by three pumps that add before the adipic acid, becomes #1, #3 pump operation, power saving 852kWh per hour, and energy-saving effect is obvious.
At unit load greater than 340MW～450MW, former flue gas SO
2Concentration is (3000～3400) mg/Nm
3The time, adding adipic acid rear slurry circulating pump can become unified take #1, #2 pump operation, i.e. two little pump operations, per hour power saving 62kWh～166kWh by any two pumps operation that adds before the adipic acid.
D, to other favourable influences of desulphurization system operation
After adding adipic acid, not only can be implemented in coal and change, desulfuration efficiency is up to standard when causing desulphurization system inlet flue gas parameter to exceed design load, guarantees clean flue gas SO
2The concentration qualified discharge.Certain desulfuration efficiency and outlet SO can also guaranteed
2Under the prerequisite of concentration, optimize the compound mode of slurry circulating pump, reduce systematic running cost greatly and use.
By observing ruuning situation and on-the-spotly understand as can be known, by optimizing the slurry circulating pump compound mode, the start and stop pump of repetition is avoided in the flexibility of raising system operation, has reduced the loss of impeller; Simultaneously, add the quality that improves gypsum behind the adipic acid, promote the generation of calcium sulphate dihydrate, can effectively prevent the obstruction and the fouling of locking system; Add buffer pH value behind the adipic acid, boiler load is had good cushioning effect, fluctuation can not take place in desulfuration efficiency, avoids the generation of the phenomenon that exceeds standard of short time; Simultaneously, also can avoid power plant because worry SO
2Exceed standard, take to reduce the minimizing of sending out the direct economy income that point load causes.
The desulfuration efficiency that Kangping power plant wet desulfurization system is obviously improved in the back is used in invention, has increased the stability of system's operation.And guaranteeing power plant desulfurization efficient and clean flue gas SO
2Concentration qualified discharge and satisfy SO
2Under the prerequisite of overall control, find the slurry circulating pump optimum composition method under the different working conditions, greatly reduced desulphurization system power consumption, liquid-gas ratio and station service power consumption rate.
After using the present invention, have full and accurate data to show, system's desulfuration efficiency improves 3%～5% under the different working conditions, and liquid-gas ratio reduces more than 30%, and the lime stone utilization rate can improve 5%～10%.During energy-saving run, calculated in 6000 hours by the operation of desulphurization system year, by optimizing the slurry circulating pump compound mode, can reduce about 6,000,000 degree of desulphurization system operation power consumption～1,000 ten thousand degree every year, calculate by 0.3 yuan/degree, after getting rid of the adipic acid cost of investment, it is about 1,500,000～2,400,000 that our factory can be saved the electricity charge every year, has good economic benefit.Concrete according to as follows:
After adding adipic acid, optimized the slurry circulating pump compound mode under the different working conditions, saved the operating cost of desulphurization system, operating cost is by different working condition results and inequality.Following two kinds of situations are mainly considered in Economic and Efficiency Analysis: 1, evenly fluctuation of the annual load of unit, and each load section time distributes identical; 2, unit is in big load, former flue gas SO the whole year
2Concentration is higher.
First kind of situation of Economic and Efficiency Analysis: desulphurization system year hours of operation press 6000h and calculate, wherein (450～600) MW, (400～450) MW, (340～400) MW, the following load condition of 340MW press 1500h calculating respectively.The Economic and Efficiency Analysis situation sees the following form.
Economic benefit contrast table before and after the desulphurization system optimization of operating parameters
Annotate: remove unit mass SO
2During relative cost calculated, this table of power consumption of desulphurization system only calculated by the power consumption of slurry circulating pump, did not consider the power consumption influence of desulphurization system miscellaneous equipment.
As can be seen from the above table, press different load mean allocation running time, when adding the desulphurization cost calculating before and after the adipic acid when unit is annual, after adding adipic acid, the desulphurization system totle drilling cost can reduce 107.9 ten thousand yuan the whole year, and wherein the amplitude that reduces of power consumption is bigger, can reduce 79.47 ten thousand yuan the whole year.After adding adipic acid, remove SO per ton
2Relative cost reduced 33.4 yuan, obvious economic.
Second kind of situation of Economic and Efficiency Analysis: desulphurization system year hours of operation press 6000h and calculate, unit load is (450～600) MW, former flue gas SO
2Concentration is (3400～3600) mg/Nm
3The Economic and Efficiency Analysis situation sees the following form.
Economic benefit contrast table before and after the desulfurizing system optimization under the high load working condition
Annotate: remove unit mass SO
2During relative cost calculated, this table of power consumption of desulphurization system only calculated by the power consumption of slurry circulating pump, did not consider the power consumption influence of desulphurization system miscellaneous equipment.
As can be seen from the above table, when under big load condition, moving unit whole year, add adipic acid after, remove SO per ton
2Relative cost reduced 37.78 yuan, the desulphurization system totle drilling cost can reduce 195.2 ten thousand yuan the whole year, wherein power consumption can reduce 153.36 ten thousand yuan the whole year, this is because under big load condition, maintain at desulfuration efficiency under 92% the prerequisite, add adipic acid after, the desulphurization system slurry circulating pump can become #1, #3 operation by three pump operations that add before the adipic acid, the pump that turned round less is so saved electric energy greatly.Be in higher and during at unit than underload, energy-conservation space maximum, add adipic acid after, the desulphurization system energy-saving effect is the most remarkable.
2) environmental benefit
After adding adipic acid, increase substantially system's desulfuration efficiency, reduce SO
2Concentration of emission, separate unit 600MW unit can reduce SO every year at least
2Discharge capacity 900t, obvious environment benefit.
Claims (6)
1. heat-engine plant wet desulfurizing agent, it includes: the lime stone and the water saturation absorption liquid that are in saturation state or hypersaturated state, it is characterized in that: adding in saturated absorption liquid has adipic acid, and the adipic acid in this saturated absorption liquid and the solute ratio of weight and number of lime stone are 0.2-0.3: 100.
2. heat-engine plant wet desulfurizing agent according to claim 1 is characterized in that: lime stone purity is more than 90%, and size distribution is 90% by 250 mesh sieve; Adipic acid purity is more than 99.7%, white powder.
3. heat-engine plant wet desulfurizing agent according to claim 1 is characterized in that: the temperature range of saturated absorption liquid is 50-65 ℃.
4. the sulfur method of a heat-engine plant wet desulfurizing agent, it includes a desulfuration absorbing tower, this desulfuration absorbing tower is disposed with from bottom to top: the lime stone and the water saturation absorption liquid that are in saturation state or hypersaturated state, saturated absorption liquid overflow pipe and liquid supplementation pipe on the sidewall of absorption tower, smoke inlet, saturated absorption liquid spray district, exhanst gas outlet after demister and the desulfurization, it is characterized in that: adding in saturated absorption liquid has adipic acid, the adipic acid in this saturated absorption liquid and the solute ratio of weight and number of lime stone are 0.2-0.3: 100, and become desulfurizing agent; Desulfurizing agent pumps into spraying layer and vaporific ejection through circulating pump, this moment with enter via smoke inlet desulfuration absorbing tower contain the sulfur dioxide flue gas countercurrent washing after, after the sulfur dioxide absorption, this flue gas is discharged via the exhanst gas outlet at demister and desulfuration absorbing tower top, again by smoke stack emission in atmosphere;
Desulfurizing agent absorbs sulfur in smoke and reaction generates calcium sulfite, introduces force air oxidation calcium sulfite and generates gypsum, separates gypsum from saturated absorption liquid;
Saturated absorption liquid serviceability temperature scope is 50-65 ℃.
5. the sulfur method of heat-engine plant wet desulfurizing agent according to claim 4, it is characterized in that: described saturated absorption liquid overflow pipe and liquid supplementation pipe all feed a desulfuration absorbing tower melt pit circulatory pool that has an agitator, the adding of adipic acid or to add be to add by absorption tower melt pit circulatory pool to be in saturation state or hypersaturated state lime stone and the water saturation absorption liquid.
6. the sulfur method of heat-engine plant wet desulfurizing agent according to claim 4 is characterized in that: lime stone purity is more than 90%, and size distribution is 90% by 250 mesh sieve; Adipic acid purity is more than 99.7%, white powder.
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| CN103301727A (en) * | 2013-06-14 | 2013-09-18 | 华南理工大学 | Deep wet process flue gas desulfurizing device and deep wet process flue gas desulfurizing method |
| CN105138718A (en) * | 2015-07-10 | 2015-12-09 | 广东电网有限责任公司电力科学研究院 | Novel calculation method for desulphurization efficiency of desulphurization tower in thermal power plant in combination with UDF and auxiliary machine load adjustment method adopting calculation method |
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| CN113655824A (en) * | 2021-07-05 | 2021-11-16 | 国能龙源环保有限公司 | Wet desulphurization spraying amount and spraying slurry pH value coupling control optimization method |
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| CN103301727A (en) * | 2013-06-14 | 2013-09-18 | 华南理工大学 | Deep wet process flue gas desulfurizing device and deep wet process flue gas desulfurizing method |
| CN103301727B (en) * | 2013-06-14 | 2015-08-26 | 华南理工大学 | A kind of degree of depth wet flue gas desulfurizer and method |
| CN105138718A (en) * | 2015-07-10 | 2015-12-09 | 广东电网有限责任公司电力科学研究院 | Novel calculation method for desulphurization efficiency of desulphurization tower in thermal power plant in combination with UDF and auxiliary machine load adjustment method adopting calculation method |
| CN105138718B (en) * | 2015-07-10 | 2018-09-28 | 广东电网有限责任公司电力科学研究院 | A kind of projectional technique and its subsidiary engine load adjustment method of combination UDF Novel fires desulfurizing tower of electric power plant desulfuration efficiency |
| CN109847567A (en) * | 2018-12-11 | 2019-06-07 | 江苏方天电力技术有限公司 | A kind of reduction gas turbine NOxThe process of concentration of emission |
| CN113655824A (en) * | 2021-07-05 | 2021-11-16 | 国能龙源环保有限公司 | Wet desulphurization spraying amount and spraying slurry pH value coupling control optimization method |
| CN113655824B (en) * | 2021-07-05 | 2022-04-22 | 国能龙源环保有限公司 | Wet desulphurization spraying amount and spraying slurry pH value coupling control optimization method |
| CN116422118A (en) * | 2023-04-18 | 2023-07-14 | 中国华电科工集团有限公司 | Flue gas desulfurization and oxidation wind system and application method thereof |
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