CN113357659A

CN113357659A - Wet flue gas desulfurization and oxidation monitoring and thermal power plant mixed sulfur co-combustion system and method

Info

Publication number: CN113357659A
Application number: CN202110627901.3A
Authority: CN
Inventors: 李永德
Original assignee: Anhui Kelide Energy And Environmental Technology Co ltd
Current assignee: Anhui Kelide Energy And Environmental Technology Co ltd
Priority date: 2021-06-05
Filing date: 2021-06-05
Publication date: 2021-09-07

Abstract

The invention discloses a wet flue gas desulfurization oxidation monitoring and thermal power plant mixed sulfur co-combustion system, which belongs to the technical field of thermal power plant mixed sulfur co-combustion, and comprises an absorption tower for desulfurization reaction and also comprises: SO (SO)₂An inlet pipe arranged outside the absorption tower, wherein SO is arranged at one side of the upper end of the absorption tower₂Outlet, said SO₂The outlet is provided with a detection device; a boiler disposed upstream of the absorption tower, a flue gas passage of the boiler and the SO₂The inlet pipe is communicated with the boiler, and a boiler coal quality analyzer is arranged at the upstream of the boiler; the slurry oxidation analyzer is arranged at the downstream of the absorption tower, and the invention realizes the function of desulfurization integral guide mixed sulfur blending combustion, thereby realizing the function of desulfurizationThe potential of the desulfurization is excavated to the maximum, the actual maximum output of the desulfurization is found, the sulfur content of the fire coal can be further promoted by a design value and is determined by a co-combustion experiment, the purchase range of the coal market of a power plant is enlarged, the adaptability and diversity of the fire coal are improved, the economic coal with higher sulfur content is purchased, and the power generation cost is greatly reduced.

Description

Wet flue gas desulfurization and oxidation monitoring and thermal power plant mixed sulfur co-combustion system and method

Technical Field

The invention belongs to the technical field of mixed sulfur mixed combustion of a thermal power plant, and particularly relates to a wet flue gas desulfurization oxidation monitoring and thermal power plant mixed sulfur mixed combustion system.

Background

The green development and ecological civilization become the strongest sound and the dominant melody in the current era, the ambitious goals of carbon peak reaching and carbon neutralization 3060 are put forward by the response country, and the traditional thermal power plant faces the urgent need of transformation and upgrading. The development trend is that the power generation cost is reduced, the core competitiveness of enterprises is enhanced, the intelligent level of a power plant is improved, the energy is saved, and the environmental protection contribution is increased.

The mixed sulfur mixed combustion reduces the power generation cost from the source aiming at the problems of coal source impurity, multiple kinds of coal, deviation from the design value and the like, but the manual extensive mixed sulfur mixed combustion cannot simultaneously meet the multiple requirements of system safety, economy, environmental protection and the like.

More than 90% of thermal power plants in China adopt a limestone-gypsum wet desulphurization process, the wet desulphurization process is divided into four stages of absorption, neutralization, oxidation and crystallization, the wet desulphurization process generally has control means for absorption, neutralization and crystallization, but the problem of uncontrolled oxidation causes the technical blank that the oxidation link cannot be measured and controlled, the oxidation air quantity is adjusted and centralized shared air distribution and the like, and the technical blank cannot be filled up.

Disclosure of Invention

The invention provides a wet flue gas desulfurization and oxidation monitoring and thermal power plant mixed sulfur co-combustion system, which aims to solve the problems mentioned in the background.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a wet flue gas desulfurization oxidation control mixes sulphur in coordination with thermal power plant and burns system, includes the absorption tower that is used for desulfurization reaction, still includes:

SO₂the inlet pipe is arranged outside the absorption tower, an SO2 outlet is arranged on one side of the upper end of the absorption tower, and a detection device is arranged at the SO2 outlet;

the boiler is arranged at the upstream of the absorption tower, a flue gas channel of the boiler is communicated with the SO2 inlet pipe, and a coal quality analyzer is arranged at the upstream of the boiler;

the slurry oxidation analyzer is arranged at the downstream of the absorption tower, and a liquid inlet of the slurry oxidation analyzer is communicated with the absorption tower;

the DCS control chamber is arranged on one side of the slurry oxidation analyzer, and a signal input end of the DCS control chamber is electrically connected with a measurement signal output end of the slurry oxidation analyzer;

the oxidation fan is arranged below the DCS control chamber, an air outlet of the oxidation fan is communicated with the inside of the absorption tower, and the oxidation fan is electrically connected with a signal output end of the DCS control chamber;

and the limestone slurry tank is arranged on one side of the absorption tower and is communicated with the absorption tower through a plurality of groups of slurry circulating pumps, and the plurality of groups of slurry circulating pumps are communicated with the limestone slurry tank and the absorption tower through pipelines.

Preferably, the flue gas channel is connected with the SO₂Be provided with boiler denitrification facility and electrostatic precipitator between the inlet tube.

Preferably, an air inlet of the oxidation fan is provided with a regulating device.

Preferably, the adjusting device comprises a fixed disk fixed with the oxidation fan, an air inlet shell is arranged on one side of the fixed disk, a fairing is arranged inside the air inlet shell, a fan body is arranged on the other side of the fixed disk, a fan impeller is arranged inside the fan body, and an adjusting mechanism is arranged on the periphery of the air inlet shell;

adjustment mechanism is including setting up the circumferential strip in the outside of air inlet casing, the periphery of circumferential strip evenly is provided with the dead lever, the outer end of dead lever all is provided with the movable block, set up flutedly on the movable block, the dead lever sets up in the recess, the last fixed axis of rotation that is provided with of movable block, the axis of rotation runs through and stretches into inside the air inlet casing, the axis of rotation is connected with the rotation of air inlet casing, the one end that the axis of rotation is located the air inlet casing inside is provided with the blade.

Preferably, the oxidation fan comprises a fan body, a fan impeller is arranged in the fan body, and a fan volute is arranged on one side of the fan body.

Preferably, a driving mechanism is arranged on the ring strip;

actuating mechanism is including fixing the fixed column at the girth outside surface, the outside of fixed column is provided with the fixed strip, the notch has been seted up on the fixed strip, the fixed column sets up in the notch, the one end of fixed strip sets up the dwang, the outside of dwang is provided with the sleeve, telescopic outside one side is provided with the fixed plate, the fixed plate is fixed outside the air inlet casing, the dwang stretches out telescopic upper end rigid coupling and has the movable rod.

Preferably, one end of the movable rod is provided with an actuator.

Preferably, the fairing is provided with a spherical shape on one side and a long cylinder shape on one side.

A wet flue gas desulfurization and oxidation monitoring and thermal power plant mixed sulfur co-combustion method specifically comprises the following steps:

(1) an absorption stage: increasing the number of the slurry circulating pumps and controlling the SO outlet₂The discharge concentration is less than or equal to 35mg/m³；

(2) And (3) a neutralization stage: adding limestone slurry and maintaining the pH value of the slurry between 5.4 and 5.8;

(3) and (3) an oxidation stage: energy-saving optimized control of the desulfurization oxidation air;

(4) and (3) a crystallization stage: adjusting the retention time of the slurry in the absorption tower to discharge the slurry in time so as to fully oxidize the slurry until the slurry density reaches 1130-1180kg/m³The gypsum is prepared by discharging slurry and dehydrating.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention realizes the function of integrally guiding mixed sulfur blending combustion in desulfurization, thereby maximally excavating desulfurization potential, finding out the maximum output of actual desulfurization, further improving the sulfur content of the fire coal from the design value, determining by a blending combustion experiment, expanding the purchase range of the coal market in a power plant, improving the adaptability and diversity of the fire coal, purchasing the economic coal with higher sulfur content, and greatly reducing the power generation cost.

2. According to the invention, the slurry oxidation analyzer is used for sampling and analyzing the oxidation index of the slurry in the absorption tower, namely the concentration of sulfite which is a residual product of slurry oxidation is controlled in a specified range, and a measurement signal is transmitted back to the DCS control room to control the opening degree of the air door of the inlet adjusting device of the oxidation fan, SO that the automatic energy-saving operation of an oxidation air system is realized, the oxidation air volume is utilized to the maximum extent, the waste is avoided, and the risks of large limestone consumption, reduced gypsum purity, difficult gypsum dehydration and the like caused by the fact that SO2 in flue gas cannot be fully absorbed and discharged to exceed the standard, slurry poisoning and increased operation cost due to insufficient oxidation air volume are avoided.

3. The box body of the slurry oxidation analyzer disclosed by the invention is isolated from air, so that data distortion caused by air oxidation is avoided, a certain speed and direction vortex is formed by slurry entering the sampler from the sampling pipe, the analyzer body can be stably and continuously detected by the flow direction change of the slurry, and a measurement signal is transmitted to the DCS control chamber, so that real-time monitoring is realized, the slurry can be prevented from being deposited and blocked by the flushing water of a specific flushing water pipe, and the problem of detection data fluctuation caused by bubbles caused by the quality problem of the slurry is solved; the heat preservation cotton and the heat preservation layer protect the temperature of the slurry to be stable, and the distortion of other ion point positions to the detection data is isolated, so that the detection is accurate, and the real-time detection is realized.

4. The adjusting device has a large adjusting range and excellent adjusting performance;

through the passageway that forms between air inlet casing, radome fairing, blade and air inlet casing and the radome fairing, have unique variable geometry runner, be different from the adjustable stator in the import of fan factory present configuration, if: petal valve can effectively reduce the impact and the flow friction loss of air current, forms the swirl field in advance, and effectual reduction guarantees that the wind pressure reaches the technological requirement because the wind pressure loss that the inlet valve opening degree of adjusting low caused, has unique wind field design to guarantee that fan regulation performance is stable, adjust the degree of depth big, there is not ordinary fan entry, if: the fan speed is kept unchanged, but the current of the motor can be reduced due to timely changing the flow of the fan, so that a large amount of electricity can be saved, and if the fan works under 70% of load, the electricity saving rate can reach 15-20% or even more;

5. the adjusting device reduces surge and enlarges a working area;

the invention is different from the traditional adjusting mode which is easy to cause the surging of the fan, the working interval is far less than the requirement of the change of the actual working condition, and the great waste of resources is caused.

6. The adjusting device is efficient and energy-saving, and the manufacturing cost is reduced;

the integrated technology has high economic value, is convenient to install, does not need any change on the original fan unit, and has relatively gentle fan pressure drop in the adjusting process, so the requirement of a user on the fan pressure can be considered while the air supply amount is reduced, the maintenance and maintenance workload is extremely low, the fan flow can be dynamically and finely adjusted in real time according to the actual operation working condition, the precision is high, the adjusting performance is stable, the excellent flow-pressure adjusting performance is realized, the motor does not need to be modified and replaced, the cost performance is very high, and the fan unit is suitable for popularization.

Drawings

FIG. 1 is a schematic structural diagram of a system for monitoring and coordinating wet flue gas desulfurization and oxidation with mixed sulfur co-combustion in a thermal power plant.

FIG. 2 is a schematic view of the connecting structure of the SSR and the oxidation fan.

Fig. 3 is a schematic view of the internal structure of the air intake housing of the present invention.

Fig. 4 is a schematic structural diagram of the driving mechanism of the present invention.

Fig. 5 is a schematic structural diagram of the adjusting mechanism of the present invention.

FIG. 6 is a connection structure diagram of the ring strip, the fixed rod, the groove and the movable block.

Fig. 7 is a schematic view of the state of adjustment of the adjusting mechanism of the present invention.

FIG. 8 is a comparison graph of the surge limit of the ordinary blower with the SSR.

FIG. 9 is a comparison graph of the original wind speed and the SSR added.

FIG. 10 is a schematic view of the structure of the slurry oxidation analyzer of the present invention.

FIG. 11 is a side view of a slurry oxidation analyzer of the present invention.

FIG. 12 is a schematic perspective view of a slurry oxidation analyzer according to the present invention.

FIG. 13 is a schematic representation of the load and coal sulfur content trends of the present invention.

In the figure: 1. an air inlet housing; 2. a cowling; 3. a drive mechanism; 31. an actuator; 32. a fixing plate; 33. a sleeve; 34. a fixing strip; 35. fixing a column; 36. a notch; 37. rotating the rod; 38. a movable rod; 4. a fan impeller; 5. a fan volute; 6. a fan body; 7. fixing the disc; 8. an adjustment mechanism; 81. a blade; 82. a ring strip; 83. fixing the rod; 84. a groove; 85. a movable block; 86. a rotating shaft; 101. a seal member; 102. flushing the water pipe; 103. a sampler; 104. a liquid collector; 105. a liquid baffle; 106. a heat-insulating layer; 107. a platform base; 108. a lifting frame; 109. a placing table; 110. heat preservation cotton; 111. a sampling tube; 112. a display screen; 113. an analyzer body; 114. a first door; 115. a blow-off pipe; 116. a box body; 117. a second door.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-13, the present invention provides the following technical solutions:

example 1

The utility model provides a wet flue gas desulfurization oxidation control mixes sulphur in coordination with thermal power plant and burns system, includes the absorption tower that is used for desulfurization reaction, still includes:

SO₂an inlet pipe arranged outside the absorption tower, wherein SO is arranged at one side of the upper end of the absorption tower₂Outlet, said SO₂The outlet is provided with a detection device for detecting SO₂Carrying out concentration detection;

a boiler disposed upstream of the absorption tower, the boilerFlue gas channel of (2) and said SO₂An inlet pipe communicated with the flue gas channel and the SO₂A boiler denitration device and an electrostatic dust collector are arranged between the inlet pipes; for removing the pin and removing dust; a coal quality analyzer is arranged at the upstream of the boiler;

the slurry oxidation analyzer is an SOA and is arranged at the downstream of the absorption tower, and a liquid inlet of the slurry oxidation analyzer is communicated with the absorption tower;

(1) an absorption stage: increasing the number of the slurry circulating pumps and controlling the SO outlet₂The discharge concentration is less than or equal to 35mg/m³The safety and environmental protection accidents are avoided;

(2) and (3) a neutralization stage: limestone slurry is added, the pH value of the slurry is maintained between 5.4 and 5.8, absorption is influenced by too low, and oxidation is influenced by too high;

Specifically, a coal-as-fired analyzer is introduced for real-time dynamic detection, the sulfur content of the coal-as-fired is accurately controlled, and the safety of mixed sulfur co-combustion is improved; the whole desulfurization process is used for participating in control, the limitation of mixed sulfur blending combustion due to design is overcome, the actual desulfurization capacity is truly reflected, weak links in four stages influencing the overall desulfurization capacity are found out, the weak links refer to the four stages in the desulfurization process, and after mixed sulfur, which stage cannot meet the control requirement firstly is the weak link; the upper limit of the total sulfur content in the furnace is determined by taking the weak link as a basis and a reference for guiding mixed sulfur blending combustion control, and the blending combustion proportion of conventional coal and economic coal is guided by multi-parameter fusion calculation, so that the maximum safety, environmental protection and economic benefits are exerted.

1. The blending combustion experiment improves the upper limit of the total sulfur content in the furnace:

for example, in the blending combustion experiment, the sulfur content of the blended sulfur blending combustion coal can be continuously increased under the full load condition of a 600MW unit, the whole desulfurization process is used for participating in control, and the upper limit of the total sulfur content in the furnace is determined by weak links.

For example, in a co-combustion experiment, conventional coal with the sulfur content of 0.8 percent is combusted, the calorific value is 4800 kilocalories/kg, the full load is 600MW, and the coal consumption of a boiler is determined to be 290 t/h; the blending combustion of conventional coal with 1.5 percent of sulfur content, the heat value of 3400 kilocalories/kg and the full load of 600MW determines that the coal consumption of a boiler is 410 t/h; the raw materials are mixed and burned according to the following proportion:

the upper limit of the total sulfur content in the furnace is obtained when 40 percent of economic coal is co-fired, the total sulfur content in the furnace is 384.84 percent t/h, and the average value of the coal sulfur is 1.14 percent. (determination of actual adulteration, taking the value temporarily as the basis for the following analysis)

2. Determining the load and coal sulfur content curves:

determining the trend of the sulfur content of the fire coal and guiding the mixed sulfur mixed combustion work by taking the determined total sulfur content in the furnace as a boundary according to the daily boiler load curve, wherein the schematic diagram is shown in FIG. 13:

because the whole desulfurization process participates in control, the weak link is used as the basis and reference for guiding mixed sulfur blending combustion control, the desulfurization potential is excavated to the maximum extent, and the upper limit of the total sulfur content in the furnace is improved. When the actual mixed sulfur is co-fired, coal with higher sulfur content can be co-fired under the same load, and greater economic benefit is generated on the premise of ensuring the safety of desulfurization.

3. Mixed sulfur co-combustion control strategy:

carrying out mixed sulfur blending combustion, keeping the total heating amount of the fire coal to maintain the load and the efficiency of the boiler, determining blending combustion proportion under different loads to guide coal blending according to the upper limit of the total sulfur content in the boiler determined by a blending combustion experiment and through multi-parameter fusion calculation according to parameters such as the load of the boiler, the heat value of the fire coal, the sulfur content of the fire coal and the like, selecting specific load change of the boiler in the following table, and giving a mixed sulfur blending combustion reference table according to the heat value of the fire coal and the sulfur content of the fire coal (the accurate calculation is determined according to actual:

mixed sulfur mixed burning calculation formula

Coal kind	Heat value	Sulfur content	Full load (P)₀) Consumption of
				Conventional coal	Q₀	S₀	M₀
Economic coal 1	Q₁	S₁
				Economic coal 2	Q₂	S₂

The blending combustion under the actual load (Ptrue) is that the blending combustion amounts of various coal types are respectively N0, N1 and N2, and the following equations are satisfied:

first, heat value satisfies

II, sulfur value satisfies

Determining the upper limit of the total sulfur content of the coal as fired to be S% t/h by a blending combustion test,

S％t/h≥N0×S0+N1×S1+N2×S2

example 2

As an optional situation, please refer to fig. 10-12, a wet flue gas desulfurization and oxidation monitoring and thermal power plant mixed sulfur co-combustion system, a slurry oxidation analyzer includes a box 116, a liquid collector 104 is disposed inside the box 116, a drain pipe 115 is disposed at the bottom of the liquid collector 104 for discharging slurry in the liquid collector 104, the drain pipe 115 extends into the box 116, and a liquid baffle plate 105 is disposed below the liquid collector 104 for preventing slurry from leaking; a sampler 103 is arranged above the liquid collector 104, a placing table 109 is arranged on the outer side of the bottom of the sampler 103, a lifting frame 108 is arranged at the lower end of the placing table 109, a sealing element 101 is arranged at the upper end of a box body 116, an analyzer body 113 is arranged at the upper end of the sealing element 101, a measuring signal of the analyzer body 113 is input into a DCS control room, a first box door 114 which is hinged to the surface of the analyzer body 113 is arranged for viewing analysis data, and a display screen 112 is arranged in the middle of the first box door 114; a detection probe of the analyzer body 113 is inserted into the sampler 103, a sampling tube 111 is arranged at the rear side of the box body 116, and the sampling tube 111 extends into the sampler 103 and is attached along the inner wall of the sampler 103; in order to stably support the platform base 107, the platform base 107 is arranged at the bottom of the box body 116;

in this embodiment, in order to avoid the thick liquid sediment jam, and can eliminate the bubble, prevent the bubble gathering, the rear side of box 116 is provided with wash pipe 102, and wash pipe 102 stretches into in sampler 103, and sets up along the laminating of sampler 103 inner wall.

In this embodiment, in order to protect the temperature stability of the slurry and isolate the distortion of the detection data caused by other ion point positions, the surface of the box 116 is hinged with a second box door 117, the adjacent surfaces of the closed positions of the second box door 117 and the box 116 are both provided with an insulating layer 106, and the interlayer of the inner wall of the box 116 is provided with insulating cotton 110.

Specifically, slurry in the absorption tower continuously enters the sampler 103 through the sampling pipe 101, the oxidation index of the slurry is measured through a probe of the analyzer body 113, namely, the concentration of sulfite which is a residual product of slurry oxidation is controlled in a specified range, air is isolated through the box body 116, so that data distortion caused by air oxidation is avoided, the slurry enters the sampler 103 from the sampling pipe 111 to form a vortex with a certain speed and direction, the analyzer body 113 can stably and continuously detect the slurry through flow direction conversion of the slurry, a measurement signal is transmitted to the DCS control chamber, the slurry can be prevented from being precipitated and blocked by flushing of a specific flushing water pipe 102, and the problem of detection data fluctuation caused by bubbles caused by the problem of slurry quality is solved; the heat insulation cotton 106 and the heat insulation layer 110 protect the temperature stability of the slurry and isolate the distortion of other ion point positions to the detection data.

Example 3

As an optional situation, please refer to fig. 2-9, a wet flue gas desulfurization and oxidation monitoring and thermal power plant sulfur mixing and blending combustion system, the oxidation separator comprises a fan body, a fan impeller 4 is arranged inside the fan body 6, a fan volute 5 is arranged on one side of the fan body 6, and an air inlet of an oxidation fan is provided with a regulating device, namely an SSR, the regulating device comprises a fixed disk 7 fixed with the oxidation fan, an air inlet housing 1 is arranged on one side of the fixed disk 7, a fairing 2 is arranged inside the air inlet housing 1, the fairing 2 is arranged in a spherical shape on one side, and a long cylinder shape on one side, so that turbulence generated before air enters the fan can be well regulated, unnecessary mechanical wear and energy loss are reduced, and the fan can be used more efficiently; the air inlet shell 1 and the fairing 2 form a unique air inlet channel, so that air can be reasonably turned and is closer to the wind direction of the fan impeller 4, and the air inflow speed is increased; the periphery of the air inlet shell 1 is provided with an adjusting mechanism 8;

adjustment mechanism 8 is including setting up the circumferential strip 82 in the outside of air inlet casing 1, the periphery of circumferential strip 82 evenly is provided with dead lever 83, the outer end of dead lever 83 all is provided with movable block 85, seted up recess 84 on the movable block 85, dead lever 83 sets up in recess 84, the fixed axis of rotation 86 that is provided with on the movable block 85, axis of rotation 86 runs through and stretches into inside air inlet casing 1, axis of rotation 86 rotates with air inlet casing 1 and is connected, the one end that axis of rotation 86 is located air inlet casing 1 inside is provided with blade 81, it is adjustable through blade 81, thereby change the direction of entry air, form and the unanimous air current of 4 turning of fan impeller, make in the more efficient entering fan body 6 of air, the more efficient operation of fan body 6.

For driving and adjusting, the ring strip 82 is provided with a driving mechanism 3;

actuating mechanism 3 is including fixing the fixed column 35 at the surface of the ring 82 outside, the outside of fixed column 35 is provided with fixed strip 34, notch 36 has been seted up on the fixed strip 34, fixed column 35 sets up in notch 36, the one end of fixed strip 34 sets up dwang 37, the outside of dwang 37 is provided with sleeve 33, outside one side of sleeve 33 is provided with fixed plate 32, fixed plate 32 is fixed outside air inlet casing 1, the upper end rigid coupling that dwang 37 stretched out sleeve 33 has movable rod 38, in order to adjust more accurately, the one end of movable rod 38 is provided with executor 31, executor 31 is connected with the output signal end of DCS control room.

In the prior art, a fan always works in combination with a pipe network, if the resistance of a pipe network system is stable in the combined work, the fan also can work stably under a certain working condition, and the working condition is the design working condition of the fan. The resistance of the pipe network can change frequently in the actual production operation, namely the performance change curve of the pipe network, and the flow and pressure change of the fan is required to meet the specific value according to the requirement of the production process. According to the change of the performance of the pipe network, the performance curve of the pipe network is correspondingly changed, and the process is called as the performance adjustment of the fan. The adjusting device can achieve the purpose of changing the performance of the fan by changing the angle of the inlet air flow entering the fan impeller 4, and simultaneously can change the boundary, the flow, the air pressure and the shaft power, as shown in fig. 7, when the equal-pressure outlet and equal-flow adjustment of the fan are adopted, the power of the fan body 6 is obviously reduced due to the large reduction of the flow and the higher adjusting efficiency, thereby achieving the dual purposes of saving power and adjusting, and the adjusting device is operated according to the change of working conditions to implement remote manual operation or automatic control.

According to the velocity triangle, the velocity of the fluid in the fan wheel 4 is the sum of the vectors of the tangential traction velocity along the fan wheel 4 and the axial relative velocity, see fig. 8. The adjusting device changes the wind direction and strengthens the wind speed, so that the wind speed at the outlet of the fan body 6 is increased, and the wind direction opposite to the running direction of the fan is formed. According to the wind pressure formula, the wind pressure and the wind speed are in a direct proportion relation, and when the wind speed is increased, the wind pressure is also increased along with the increase of the wind speed. Therefore, the stability of the wind pressure at the outlet of the fan body 6 well kept by the adjusting device can better meet the requirement of the desulfurization oxidation wind process, a wind direction opposite to the fan body 6 can be formed through the blades 81 to form a rotational flow field, the loss of the wind pressure can be effectively reduced, and the energy loss is reduced.

Specifically, during the use, it rotates to drive movable rod 38 through executor 31, thereby drive dwang 37 and fixed strip 34 and rotate, it rotates along air inlet casing 1 to drive fixed column 35 and gird 82 through notch 36, thereby it rotates to drive dead lever 83, it rotates to drive movable block 85 through dead lever 83, it rotates to drive axis of rotation 86, finally drive blade 81 and rotate, thereby it changes the direction of entry air to make to reach the change blade 81 direction, form the air current unanimous with fan wheel 4 turning, make in the more efficient entering fan body 6 of air, the more efficient operation of fan body 6.

The scheme in this embodiment can be selectively combined with the scheme in other embodiments.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a wet flue gas desulfurization oxidation control mixes sulphur in coordination with thermal power plant and burns system, includes the absorption tower that is used for desulfurization reaction, its characterized in that still includes:

SO₂an inlet pipe arranged outside the absorption tower, wherein SO is arranged at one side of the upper end of the absorption tower₂Outlet, said SO₂The outlet is provided with a detection device;

a boiler disposed upstream of the absorption tower, a flue gas passage of the boiler and the SO₂The inlet pipe is communicated with the boiler, and a boiler coal quality analyzer is arranged at the upstream of the boiler;

2. The wet flue gas desulfurization oxidation monitoring and heat-engine plant mixed sulfur co-combustion system according to claim 1, characterized in that: the flue gas channel and the SO₂Be provided with boiler denitrification facility and electrostatic precipitator between the inlet tube.

3. The wet flue gas desulfurization oxidation monitoring and heat-engine plant mixed sulfur co-combustion system according to claim 1, characterized in that: and an air inlet of the oxidation fan is provided with an adjusting device.

4. The wet flue gas desulfurization oxidation monitoring and heat-engine plant mixed sulfur co-combustion system according to claim 3, characterized in that: the adjusting device comprises a fixed disk fixed with the oxidation fan, an air inlet shell is arranged on one side of the fixed disk, a fairing is arranged inside the air inlet shell, a fan body is arranged on the other side of the fixed disk, a fan impeller is arranged inside the fan body, and an adjusting mechanism is arranged on the periphery of the air inlet shell;

5. The wet flue gas desulfurization oxidation monitoring and heat-engine plant mixed sulfur co-combustion system according to claim 1, characterized in that: the oxidation fan comprises a fan body, a fan impeller is arranged in the fan body, and a fan volute is arranged on one side of the fan body.

6. The wet flue gas desulfurization oxidation monitoring and heat-engine plant mixed sulfur co-combustion system according to claim 4, characterized in that: the ring strip is provided with a driving mechanism;

7. The wet flue gas desulfurization oxidation monitoring and heat-engine plant mixed sulfur co-combustion system according to claim 6, characterized in that: one end of the movable rod is provided with an actuator.

8. The wet flue gas desulfurization oxidation monitoring and heat-engine plant mixed sulfur co-combustion system according to claim 4, characterized in that: the fairing is set to be spherical on one side and long-barrel-shaped on one side.

9. The wet flue gas desulfurization and oxidation monitoring and thermal power plant mixed sulfur mixed combustion method is characterized by comprising the following steps of: