CN110314526A - A kind of serum recycle system adjusts space calculation method and its device - Google Patents
A kind of serum recycle system adjusts space calculation method and its device Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract
A kind of serum recycle system of the present invention adjusts space calculation method and its device, which includes: to calculate pipeline head loss according to the equipment size and resistance factor of component each in serum recycle pipeline；According to the minimum inlet pressure level for ensuring nozzle atomization effect, pipeline minimum flow value is calculated；According to the state parameter of pipeline import and export slurries, pipeline head loss and pipeline minimum flow value, the minimum lift value of pump is calculated；According to pump under other revolving speeds performance curve, pipeline minimum flow value and pump minimum lift value, obtain the minimum speed value of pump；Pump minimum speed value to rated speed value is that single pipeline adjusts space；It is that serum recycle system adjusts space that each pipeline, which adjusts the sum of space,.The regulating device includes: attached with frequency converters or speed regulation type hydrodynamic coupler on the pump of the pipeline.The present invention can instruct desulfurization slurry circulation reform, improve security and stability, the flexible adjustment of wet desulfurization system operation, while play energy-conserving action.
Description
Technical field
The invention belongs to Wet Flue Gas Desulfurization Technique fields, and in particular to a kind of serum recycle system adjust space calculation method and
Its device.
Background technique
A large amount of Thermal generation units domestic over the past two years start to carry out flexibility technological transformation, and gradually participate in depth tune
Peak, and use flue gas desulfurization (FGD) system of Limestone-gypsum Wet Flue Gas Desulfurization Process technique that traditional slurry circulating pump is still leaned on to combine fortune
The modes such as row optimization, the regulation of absorption tower slurry pH value are adjusted, and lack rapid regulation performance and depth adjustment performance, so be
Ensure desulphurization system stable operation and avoids SO2Concentration over-standard discharge, it will usually using the more conservative method of operation, thus
Result in the higher problem of energy consumption.
Desulphurization system energy consumption generally accounts for 0.5~1.5% or so of unit generation amount with coal-fired sulfur content, and high can reach
2.0% or more, and slurry circulating pump is as main current consuming apparatus, it is 65~76% left to account for entire desulphurization system energy consumption again for energy consumption
It is right.And by the attached with frequency converters on slurry circulating pump or speed regulation type hydrodynamic coupler, flow tune is carried out to serum recycle pipeline
Section, to realize the process optimization of desulphurization system and energy-saving.
In conclusion the serum recycle system of existing wet desulfurization system has the following problems:
(1) desulphurization system security and stability is insufficient: frequent high-power pump start and stop will affect the electrical machinery life of pump, absorption tower
The voltage fluctuation of liquid level stablized and cause power grid in factory.
(2) desulphurization system flexibility is insufficient: for participating in the coal motor group of peak regulation, frequency is compared in unit load fluctuation
Numerous, desulphurization system is more difficult to follow host to make energy-efficient pump Combinatorial Optimization operation, because this adjustment mode is for desulfurization effect
Be it is nonlinear, i.e., desulphurization system lack with former flue gas SO2The linear regulation performance and rapid tune of concentration and unit load fluctuation
Save performance；When unit load is lower or coal-fired sulfur content is far below designing coal quality sulfur content, even if using most energy-efficient operation
Mode, it is possible to SO2Concentration of emission press very low even zero, be unable to fully using SO2Concentration of emission crimping space, i.e.,
Desulphurization system lacks depth adjustment performance.
(3) desulphurization system operation energy consumption is higher: the raising of slurries spray flow is conducive to the reinforcing of mass-transfer performance, to improve
Desulfuration efficiency, but desulfuration efficiency is with the increase of slurries spray flow and increased trend gradually slows down, i.e., slurries spray flow is greatly to one
Become smaller after determining degree to the influence for improving desulfuration efficiency, and the proportional increase of system energy consumption.After minimum discharge transformation, mostly
Number desulphurization system runs on high desulfurization efficiency section to meet 35mg/Nm3Discharge standard, and in order to avoid fluctuation of operating conditions causes
The exceeded situation of discharge, generally can be neat stress SO2Concentration is pressed relatively low, i.e., desulphurization system is unable to fully utilize neat stress SO2
Concentration crimping running space, energy consumption are higher.
Summary of the invention
Based on the above demand and disadvantage, the object of the present invention is to provide a kind of serum recycle systems to adjust space calculation method
And its device, to improve security and stability, the flexible adjustment of wet desulfurization system operation, while playing energy-conserving action.
The present invention adopts the following technical scheme that realize:
A kind of serum recycle system regulating device, including several serum recycle pipelines, each serum recycle pipeline press slurries
Flow direction is successively connected and composed by strainer, butterfly valve, pump intake pipeline, slurry circulating pump, pump discharge pipeline and nozzle, and strainer
The junction on pump intake pipeline and absorption tower is set, and the slurries in absorption tower, on each serum recycle pipeline are arranged in nozzle
Frequency converter or speed regulation type hydrodynamic coupler are added on circulating pump, to realize that the flow to serum recycle pipeline is adjusted.
A further improvement of the present invention lies in that former flue gas becomes net cigarette after carrying out desulphurization reaction with slurries inside absorption tower
Gas.
A kind of serum recycle system adjusting space calculation method, which is characterized in that this method is based on a kind of above-mentioned slurries and follows
Loop system regulating device, comprising the following steps:
Obtain the equipment size and resistance factor of each component in serum recycle pipeline；
According to the equipment size and resistance factor of each component in the serum recycle pipeline, serum recycle pipeline pressure head is calculated
Loss；
Obtain the minimum inlet pressure level for ensuring nozzle atomization effect；
According to the minimum inlet pressure level for ensuring nozzle atomization effect, nozzle minimum flow value is calculated, further,
Calculate serum recycle pipeline minimum flow value；
Obtain the state parameter of serum recycle pipeline import and export slurries；
According to the state parameter of the serum recycle pipeline import and export slurries, the serum recycle pipeline head loss and
The serum recycle pipeline minimum flow value calculates the minimum lift value of slurry circulating pump；
Obtain slurry circulating pump performance curve under other revolving speeds；
According to the slurry circulating pump under other revolving speeds performance curve, the serum recycle pipeline minimum flow value and institute
The minimum lift value for stating slurry circulating pump, obtains the minimum speed value of slurry circulating pump；
The slurry circulating pump minimum speed value to rated speed value is that single serum recycle pipeline adjusts space；
It is that serum recycle system adjusts space that each serum recycle pipeline, which adjusts the sum of space,.
A further improvement of the present invention lies in that according to the equipment size of each component in the serum recycle pipeline and resistance because
Number, calculates the head loss of each component, further, calculates serum recycle pipeline head loss, its calculation formula is:
Hl=Hnet+Hvalve+Hnozzle+Hin+Hout
In formula, Hnet、Hvalve、HnozzleThe respectively local losses of head of strainer, butterfly valve, nozzle, Hin、HoutRespectively pump
Entrance pipe, pump discharge pipeline along journey head loss, ξnet、ξvalve、ξnozzleThe respectively part resistance of strainer, butterfly valve, nozzle
Force factor, λin、λoutThe respectively on-way resistance factor of pump intake pipeline, pump discharge pipeline, vnet、vvalve、vnozzle、vin、vout
Respectively slurry flow rate of the slurries in strainer, butterfly valve, nozzle and pump intake pipeline, pump discharge pipeline, dnet、dvalve、dnozzle、
din、doutRespectively diameter of section of the slurries in strainer, butterfly valve, nozzle and pump intake pipeline, pump discharge pipeline, lin、loutRespectively
For the length of pump intake pipeline, pump discharge pipeline, Q is serum recycle piping flow, HlFor serum recycle pipeline head loss.
A further improvement of the present invention lies in that according to the minimum inlet pressure level and nozzle for ensuring nozzle atomization effect
Pressure flow relation formula can be calculated serum recycle pipeline minimum flow value Qmin。
A further improvement of the present invention lies in that according to the state parameter and primary of the serum recycle pipeline import and export slurries
Sharp equation is exerted, serum recycle pump lift is calculated, its calculation formula is:
To obtain the final product:
In formula, H1、H2The respectively position height of pipeline inlet and outlet, v1、v2The respectively slurry stream of pipeline import and export
Speed, d1、d2The respectively diameter of section of pipeline import and export, p0For atmospheric pressure, ρ is serum density, and g is that acceleration of gravity is normal
Number, HpFor serum recycle pump lift.
A further improvement of the present invention lies in that according to the serum recycle pipeline minimum flow value Qmin, substitute into the slurries
Circulation line head loss formula and the serum recycle pump lift formula can obtain slurry circulating pump minimum lift value Hmin。
A further improvement of the present invention lies in that according to the slurry circulating pump under other revolving speeds performance curve, the slurry
Liquid circulation line minimum flow value QminWith the slurry circulating pump minimum lift value Hmin, as performance curve crossing point M (Qmin,
Hmin) when, corresponding revolving speed is minimum speed value nmin。
A further improvement of the present invention lies in that the slurry circulating pump minimum speed value nminIt is single to rated speed value n
A serum recycle pipeline adjusts space, and it is that serum recycle system adjusts sky that each serum recycle pipeline, which adjusts the sum of space,
Between.
The invention has the following beneficial technical effects:
(1) the present invention provides a kind of serum recycle systems to adjust space calculation method, to instruct desulfurization slurry cyclic system
System transformation, improves the effect of transformation.
(2) for participating in the coal motor group of peak regulation, unit load fluctuation is more frequent, and desulphurization system is more difficult to follow master
Machine makees energy-efficient pump Combinatorial Optimization operation, because this adjustment mode is nonlinear for desulfurization effect, and frequent big
Power pump start and stop will affect the voltage fluctuation of the electrical machinery life of pump, absorbing tower liquid-level stablized and cause power grid in factory, this hair
Bright application improves the security and stability of desulphurization system, while it is certain with former flue gas SO that desulphurization system is had2Concentration
With the linear regulation performance and rapid regulation performance of unit load fluctuation.
(3) when unit load is lower or coal-fired sulfur content is far below designing coal quality sulfur content, even if using most energy-efficient
The method of operation, it is possible to SO2Concentration of emission press very low even zero, be unable to fully using SO2Concentration of emission crimping is empty
Between, and application of the invention can make desulphurization system have certain depth adjustment performance, and operation energy consumption can be effectively reduced.
(4) raising of slurries spray flow is conducive to the reinforcing of mass-transfer performance, to improve desulfuration efficiency, but desulfuration efficiency with
The increase of slurries spray flow and increased trend gradually slows down, i.e., slurries spray flow greatly to a certain extent afterwards to improve desulfuration efficiency
Influence become smaller, and the proportional increase of system energy consumption.After minimum discharge transformation, most of desulphurization systems run on high desulfurization
Efficiency section is to meet 35mg/Nm3Discharge standard, and in order to avoid the exceeded situation of discharge caused by fluctuation of operating conditions, general meeting
Neat stress SO2Concentration is pressed relatively low, and application of the invention is so that desulphurization system can make full use of neat stress SO2Concentration pressure
Line running space, energy-saving effect are obvious.
(5) speed regulation of slurry circulating pump reduces the intracorporal slurry flow rate of pump, thus reduces the abrasion to pump, extends the pump housing
Reparation or the replacement cycle, reduce maintenance workload and maintenance cost.
Detailed description of the invention
Fig. 1 is the slurry circulating pump and its characteristic curve of pipeline figure of the embodiment of the present invention；
Fig. 2 is the process flow chart of the embodiment of the present invention.
Description of symbols:
1 is strainer, and 2 be butterfly valve, and 3 be pump intake pipeline, and 4 be slurry circulating pump, and 5 be pump discharge pipeline, and 6 be nozzle, and 7 are
Former flue gas, 8 be absorption tower, and 9 be neat stress.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing.
The revolving speed of pump changes, and the performance parameter after speed change can be found out according to similarity law:
In formula, Q, QmRespectively pump the flow before and after speed change, H, HmRespectively pump the lift before and after speed change, P, PmRespectively
Pump the power before and after speed change, n, nmRespectively pump the revolving speed before and after speed change.
But similarity law is only applicable to affinity operating points, and serum recycle characteristic curve of pipeline is not through origin, not with
Any proportional curve for crossing running operating point is overlapped, so running operating point when adjusting under different rotating speeds is all dissimilar, below
4 operating point of slurry circulating pump and its pepeline characteristic will be analyzed, and adjust space to calculate it.
Serum recycle pipe-line system mainly by sequentially connected strainer 1, butterfly valve 2, pump intake pipeline 3, slurry circulating pump 4,
Pump discharge pipeline 5 and nozzle 6 form, as shown in Figure 2.
According to Bernoulli equation, can obtain:
To obtain the final product:
In formula, H1、H2The respectively position height of pipeline inlet and outlet, v1、v2The respectively slurry stream of pipeline import and export
Speed, d1、d2The respectively diameter of section of pipeline import and export, p0For atmospheric pressure, ρ is serum density, and g is that acceleration of gravity is normal
Number, HpFor 4 lift of slurry circulating pump, HlFor pipeline head loss.
According to serum recycle pipe-line system:
Hl=Hnet+Hvalve+Hnozzle+Hin+Hout
In formula, Hnet、Hvalve、HnozzleThe respectively local losses of head of strainer 1, butterfly valve 2, nozzle 6, Hin、HoutRespectively
For pump intake pipeline 3, pump discharge pipeline 5 along journey head loss, ξnet、ξvalve、ξnozzleRespectively strainer 1, butterfly valve 2, nozzle 6
Resistance factor, λin、λoutThe respectively on-way resistance factor of pump intake pipeline 3, pump discharge pipeline 5, vnet、vvalve、
vnozzle、vin、voutRespectively slurry stream of the slurries in strainer 1, butterfly valve 2, nozzle 6 and pump intake pipeline 3, pump discharge pipeline 5
Speed, dnet、dvalve、dnozzle、din、doutRespectively slurries are in strainer 1, butterfly valve 2, nozzle 6 and pump intake pipeline 3, pump discharge pipe
The diameter of section on road 5, lin、loutThe respectively length of pump intake pipeline 3, pump discharge pipeline 5.
Serum recycle pipeline head loss formula is substituted into 4 lift formula of slurry circulating pump, can be obtained:
If: HΔ=H2-H1
It can obtain: Hp=HΔ+S1Q2
Steps are as follows for the accounting of pump minimum speed value:
Step 1, HΔDifference in height for pipeline inlet and outlet needs to keep 8 slurry pool liquid of absorption tower in actual moving process
The stabilization of position, so can be HΔIt is considered as a constant, and ξnet、dnet、ξvalve、dvalve、ξnozzle、dnozzle、λin、lin、din、
λout、lout、dout、d2、d1It is constant, then S1It is also a constant, it can be seen that characteristic curve of pipeline HpIt is one secondary
Increasing function and Hp≥HΔ；
Step 2, slurry circulating pump 4 belongs to high-specific speed pump, thus performance curve n under its power frequency operating condition mostly1It is one
What Open Side Down successively decrease parabola；
Step 3, characteristic curve of pipeline is drawn on the performance chart of pump, two curve intersections are in a bit, that is, the work that pumps
Frequency operating point A (QA,HA)；
It step 4, is the atomizing effect for ensuring nozzle 6, there are minimum values for 6 inlet pressure of nozzle, according to the pressure current of nozzle 6
Magnitude relation formula can be calculated the minimum flow value Q of pipelinemin, substitute into the minimum that 4 lift formula of formula slurry circulating pump can must pump
Lift value Hmin, the point M (Q is sought obtaining on characteristic curve of pipelinemin,Hmin)；
Step 5, the performance curve pumped under other revolving speeds can be obtained using similarity law, as curve crossing point M (Qmin,
Hmin) when, corresponding revolving speed is minimum speed value nmin；
Slurry circulating pump 4 and its characteristic curve of pipeline figure are as shown in Figure 1.
Each serum recycle pipeline is calculated by the above calculation method, chooses and adjusts biggish one or more of space
Transformation is adjusted in a serum recycle pipeline, attached with frequency converters or speed-adjusting type hydraulic coupling on the slurry circulating pump 4 of the pipeline
Device, to realize that the flow to serum recycle pipeline is adjusted.
The present invention has the advantage that:
(1) a kind of serum recycle system adjusting space calculation method is provided, to instruct desulfurization slurry circulation reform,
Improve the effect of transformation.
(2) for participating in the coal motor group of peak regulation, unit load fluctuation is more frequent, and desulphurization system is more difficult to follow master
Machine makees energy-efficient pump Combinatorial Optimization operation, because this adjustment mode is nonlinear for desulfurization effect, and frequent big
Power pump start and stop will affect the voltage fluctuation of the electrical machinery life of pump, absorbing tower liquid-level stablized and cause power grid in factory, this hair
Bright application improves the security and stability of desulphurization system, while it is certain with former flue gas SO that desulphurization system is had2Concentration
With the linear regulation performance and rapid regulation performance of unit load fluctuation.
(3) when unit load is lower or coal-fired sulfur content is far below designing coal quality sulfur content, even if using most energy-efficient
The method of operation, it is possible to SO2Concentration of emission press very low even zero, be unable to fully using SO2Concentration of emission crimping is empty
Between, and application of the invention can make desulphurization system have certain depth adjustment performance, and operation energy consumption can be effectively reduced.
(4) raising of slurries spray flow is conducive to the reinforcing of mass-transfer performance, to improve desulfuration efficiency, but desulfuration efficiency with
The increase of slurries spray flow and increased trend gradually slows down, i.e., slurries spray flow greatly to a certain extent afterwards to improve desulfuration efficiency
Influence become smaller, and the proportional increase of system energy consumption.After minimum discharge transformation, most of desulphurization systems run on high desulfurization
Efficiency section is to meet 35mg/Nm3Discharge standard, and in order to avoid the exceeded situation of discharge caused by fluctuation of operating conditions, general meeting
Neat stress SO2Concentration is pressed relatively low, and application of the invention is so that desulphurization system can make full use of neat stress SO2Concentration pressure
Line running space, energy-saving effect are obvious.
(5) speed regulation of slurry circulating pump reduces the intracorporal slurry flow rate of pump, thus reduces the abrasion to pump, extends the pump housing
Reparation or the replacement cycle, reduce maintenance workload and maintenance cost.
Those skilled in the art is not under conditions of departing from the spirit and scope of the present invention that claims determine, also
Various modifications can be carried out to the above content.Therefore the scope of the present invention is not limited in above explanation, but by
The range of claims determines.
Claims (9)
1. a kind of serum recycle system regulating device, which is characterized in that including several serum recycle pipelines, each serum recycle pipe
Road is by slurries flow direction successively by strainer (1), butterfly valve (2), pump intake pipeline (3), slurry circulating pump (4), pump discharge pipeline
(5) it is connected and composed with nozzle (6), and strainer (1) is arranged in the junction of pump intake pipeline (3) and absorption tower (8), nozzle (6)
Setting adds frequency converter or speed-adjusting type hydraulic on the slurry circulating pump (4) on each serum recycle pipeline in absorption tower (8)
Coupler, to realize that the flow to serum recycle pipeline is adjusted.
2. a kind of serum recycle system regulating device according to claim 1, which is characterized in that former flue gas (7) is absorbing
Become neat stress (9) after carrying out desulphurization reaction with slurries inside tower (8).
3. a kind of serum recycle system adjusts space calculation method, which is characterized in that this method is based on as claimed in claim 1 or 2
A kind of serum recycle system regulating device, comprising the following steps:
Obtain the equipment size and resistance factor of each component in serum recycle pipeline；
According to the equipment size and resistance factor of each component in the serum recycle pipeline, serum recycle pipeline pressure head damage is calculated
It loses；
Acquisition ensures the minimum inlet pressure level of nozzle (6) atomizing effect；
According to the minimum inlet pressure level for ensuring nozzle (6) atomizing effect, nozzle (6) minimum flow value is calculated, further
Ground calculates serum recycle pipeline minimum flow value；
Obtain the state parameter of serum recycle pipeline import and export slurries；
According to the state parameter of the serum recycle pipeline import and export slurries, the serum recycle pipeline head loss and described
Serum recycle pipeline minimum flow value calculates the minimum lift value of slurry circulating pump (4)；
Obtain slurry circulating pump (4) performance curve under other revolving speeds；
According to the slurry circulating pump (4) under other revolving speeds performance curve, the serum recycle pipeline minimum flow value and institute
The minimum lift value for stating slurry circulating pump (4), obtains the minimum speed value of slurry circulating pump (4)；
Slurry circulating pump (4) the minimum speed value to rated speed value is that single serum recycle pipeline adjusts space；
It is that serum recycle system adjusts space that each serum recycle pipeline, which adjusts the sum of space,.
4. a kind of serum recycle system according to claim 3 adjusts space calculation method, which is characterized in that according to described
The equipment size and resistance factor of each component, calculate the head loss of each component in serum recycle pipeline, further, calculate slurry
Liquid circulation line head loss, its calculation formula is:
Hl=Hnet+Hvalve+Hnozzle+Hin+Hout
In formula, Hnet、Hvalve、HnozzleThe respectively local losses of head of strainer (1), butterfly valve (2), nozzle (6), Hin、HoutRespectively
For pump intake pipeline (3), pump discharge pipeline (5) along journey head loss, ξnet、ξvalve、ξnozzleRespectively strainer (1), butterfly valve
(2), the resistance factor of nozzle (6), λin、λoutRespectively pump intake pipeline (3), pump discharge pipeline (5) on-way resistance because
Number, vnet、vvalve、vnozzle、vin、voutRespectively slurries strainer (1), butterfly valve (2), nozzle (6) and pump intake pipeline (3),
Slurry flow rate in pump discharge pipeline (5), dnet、dvalve、dnozzle、din、doutRespectively slurries strainer (1), butterfly valve (2),
The diameter of section of nozzle (6) and pump intake pipeline (3), pump discharge pipeline (5), lin、loutRespectively pump intake pipeline (3), pump out
The length of mouth pipeline (5), Q are serum recycle piping flow, HlFor serum recycle pipeline head loss.
5. a kind of serum recycle system according to claim 4 adjusts space calculation method, which is characterized in that according to described
The pressure flow relation formula of the minimum inlet pressure level and nozzle (6) that ensure nozzle (6) atomizing effect can be calculated slurries and follow
Endless tube road minimum flow value Qmin。
6. a kind of serum recycle system according to claim 4 adjusts space calculation method, which is characterized in that according to described
The state parameter and Bernoulli equation of serum recycle pipeline import and export slurries calculate slurry circulating pump (4) lift, calculate public
Formula are as follows:
To obtain the final product:
In formula, H1、H2The respectively position height of pipeline inlet and outlet, v1、v2The respectively slurry flow rate of pipeline import and export, d1、
d2The respectively diameter of section of pipeline import and export, p0For atmospheric pressure, ρ is serum density, and g is gravity acceleration constant, HpFor
Slurry circulating pump (4) lift.
7. a kind of serum recycle system according to claim 6 adjusts space calculation method, which is characterized in that according to described
Serum recycle pipeline minimum flow value Qmin, substitute into the serum recycle pipeline head loss formula and the slurry circulating pump (4)
Lift formula can obtain the minimum lift value H of slurry circulating pump (4)min。
8. a kind of serum recycle system according to claim 7 adjusts space calculation method, which is characterized in that according to described
Slurry circulating pump (4) performance curve, the serum recycle pipeline minimum flow value Q under other revolving speedsminWith the serum recycle
Pump (4) minimum lift value Hmin, as performance curve crossing point M (Qmin,Hmin) when, corresponding revolving speed is minimum speed value
nmin。
9. a kind of serum recycle system according to claim 8 adjusts space calculation method, which is characterized in that the slurries
Circulating pump (4) minimum speed value nminIt is that single serum recycle pipeline adjusts space, each slurries to rated speed value n
It is that serum recycle system adjusts space that circulation line, which adjusts the sum of space,.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111737856A (en) * | 2020-05-25 | 2020-10-02 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Method for calculating rotating speed of variable-frequency water feeding pump of nuclear power plant |
| CN113408905A (en) * | 2021-06-21 | 2021-09-17 | 西安热工研究院有限公司 | Wet desulphurization system absorption tower energy efficiency evaluation method, system, equipment and storage medium |
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| CN113408905B (en) * | 2021-06-21 | 2023-03-14 | 西安热工研究院有限公司 | Method, system, equipment and storage medium for evaluating energy efficiency of absorption tower of wet desulphurization system |
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