CN212953068U - Circulating fluidized bed semidry method desulfurization tower bottom ash discharging device - Google Patents

Abstract

The utility model discloses a circulating fluidized bed semidry process desulfurization tower bottom ash discharge device, ash bucket at the bottom of the absorption tower, the discharge gate of ash bucket is equipped with the ash conveying main road of carrying the deposition at the bottom of the tower, one side of ash conveying main road is equipped with ash conveying bypass, ash conveying bypass communicates with each other with ash conveying main road inner chamber and the communicating part is equipped with the manual shunt valve that can switch over the ash passageway down, ash conveying main road upper portion is equipped with the counter weight flap valve, and ash conveying main road lower part is equipped with the star type dispenser, and the lower extreme export of ash conveying main road is equipped with the jet pump that can blow off the ash block fast. This ash discharging device can carry out different ash discharging modes to the different ash discharging requirements when normal operating and occurence of failure through setting up manual shunt valve, guarantees that the normal operating of system and the rapid clearance deposition after the occurence of failure possess the condition of opening the machine.

Description

Circulating fluidized bed semidry method desulfurization tower bottom ash discharging device

Technical Field

The utility model belongs to the technical field of the flue gas treatment technique and specifically relates to a circulating fluidized bed semi-dry process desulfurization tower bottom ash discharge device.

Background

In the current field of flue gas treatment in China, circulating fluidized bed semidry desulphurization (CFB-FGD) is widely applied to flue gas treatment after thermal power generation and steel sintering machines, but the desulphurization process has high requirements on the stability of the flue gas and is difficult to adapt to fluctuation and change in the sintering production process, and once the flue gas amount fluctuates violently or an induced draft fan fails suddenly, the bed layer of a circulating fluidized bed in a high-efficiency desulphurization tower collapses, and bed collapse accidents occur. After the bed collapse, a large amount of desulfurizer is accumulated at the bottom of the absorption tower, so that a flue gas channel at the inlet of the absorption tower is blocked.

The ash discharging device at the bottom of the traditional tower is low in ash discharging efficiency, the accumulated ash at the bottom of the tower can not be removed in a short time after the accident of bed collapse occurs, once the temperature of a desulfurizing agent is reduced to be below a dew point, the temperature of an absorbent is from flue gas, the temperature reduction can cause the fluidity to be reduced and damp, the accumulated ash can be accumulated and compacted due to the damp, and a discharging opening is blocked. The traditional tower bottom ash discharge device is out of function and must be manually cleaned. The manual cleaning is time-consuming and labor-consuming, and due to the limited operation space, dust in the flue flies during cleaning, which easily damages the health of staff. The accumulated dust at the bottom of the tower cannot be cleaned up, and the system cannot be restarted in a short time, so that precious production time is delayed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a dust discharging device at bottom of circulating fluidized bed semidry process desulfurization tower, the device can unload the switching of grey mode according to the demand difference, and the deashing function when the assurance system normal operating and quick clearance deposition after the occurence of failure possess the condition of starting the machine, have saved repair time and cost of labor greatly.

The utility model provides a technical scheme that its technical problem adopted is: the ash discharging device at the bottom of the circulating fluidized bed semidry desulfurization tower comprises an ash hopper at the bottom of an absorption tower and is characterized in that an ash conveying main path for conveying accumulated ash is arranged at a discharge port of the ash hopper at the bottom of the absorption tower, an ash conveying bypass is arranged on one side of the ash conveying main path, the ash conveying bypass is communicated with an inner cavity of the ash conveying main path, a manual shunt valve capable of switching an ash discharging channel is arranged at the communicated part of the ash conveying bypass, a counterweight flap valve is arranged on the upper part of the ash conveying main path, a star-shaped feeder is arranged on the lower part of the ash conveying main path, and a jet pump capable of blowing ash blocks out quickly is arranged at the.

Further, the counterweight flap valve comprises a flap, a counterweight connecting rod and a counterweight block, the flap is rotatably connected with the counterweight connecting rod through a shaft and a bearing, the flap is arranged in the inner cavity of the ash conveying main path, the counterweight connecting rod is arranged outside the ash conveying main path, and the counterweight block is movably connected with the counterweight connecting rod.

Further, manual shunt valve includes fixed plate, action bars, valve plate and locating pin, the fixed plate outside is equipped with the action bars, and the fixed plate inboard is equipped with the valve plate, action bars, fixed plate and the coaxial rotation of valve plate are connected, the fixed plate is connected with defeated grey pipeline lateral wall, the locating pin is pegged graft with the action bars activity.

Furthermore, an opening degree indicating plate for limiting the rotation angle of the operating rod is further arranged above the fixing plate, a positioning hole matched and connected with the positioning pin is formed in the opening degree indicating plate, and the opening degree indicating plate is installed on the side wall of the ash conveying pipeline.

Further, star type dispenser includes casing, rotor wheel and motor, rotor wheel locates in the casing, rotor wheel passes through drive mechanism with the motor and is connected, and the rotation of motor control rotor wheel.

Furthermore, one end of the jet pump is provided with a pneumatic conveying fan interface, and the other end of the jet pump is provided with an interface connected with an ash conveying pipeline.

The utility model has the advantages that:

1. the utility model discloses an ash discharging device can carry out different ash discharging modes to the different ash discharging requirements when normal operating and occurence of failure through setting up manual shunt valve, clears up the function of deposition fast after the normal operating of assurance system and the occurence of failure, makes the system can possess the condition of restarting in the short time.

2. Through set up star type dispenser in main pipeline's lower part, can guarantee the smooth and easy of deashing in the pipeline when the accident situation, prevent the pipeline jam.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the construction of a weighted flap valve;

FIG. 3 is a schematic view of a manual bypass valve;

FIG. 4 is a left side view of FIG. 3;

FIG. 5 is a schematic diagram of the construction of a star feeder.

In the figure:

the device comprises an absorption tower 1, a trapezoidal ash hopper 2, a counterweight flap valve 3, a turnover plate 31, a counterweight connecting rod 32, a counterweight 33, a bearing 34, a shaft 35, an ash conveying main path 4, a manual shunt valve 5, a fixed plate 51, an operating rod 52, a valve plate 53, a positioning pin 54, a rotating shaft 55, an opening indicating disc 56, a positioning hole 57, an ash conveying bypass 6, a star-shaped feeder 7, a shell 71, a rotor impeller 72, a motor 73, an injection pump 8, an ash conveying pipeline 9 and a pneumatic conveying fan interface 10.

Detailed Description

The ash discharging device at the bottom of the semi-dry desulfurization tower of the circulating fluidized bed of the invention is explained in detail with reference to the attached drawings.

As shown in fig. 1 to 5, the utility model discloses a dust discharging device at bottom of circulating fluidized bed semidry process desulfurization tower, including the ash bucket at the bottom of the absorption tower, the ash bucket is trapezoidal ash bucket 2 and locates the absorption tower discharge opening lower part at the bottom of the tower, the discharge gate of trapezoidal ash bucket 2 is equipped with the ash conveying main road 4 of carrying the deposition, one side of ash conveying main road 4 is equipped with ash conveying bypass 6, ash conveying bypass 6 communicates with each other with ash conveying main road 4 inner chamber and the communicating part is equipped with the manual shunt valve 5 that can switch over the ash passageway down, ash conveying main road 4 upper portion is equipped with counter weight flap valve 3, and ash conveying main road 4 lower part is equipped with star type feeder 7, and the lower extreme export of ash conveying main road 4 is equipped with the jet pump 8 that can blow off the ash block fast. One end of the jet pump 8 is provided with a pneumatic conveying fan interface 10, and the other end is provided with an interface connected with an ash cleaning pipeline 9. The accumulated ash falling from the ash conveying main path passes through the jet pump and then is matched with the pneumatic conveying fan to quickly and continuously clean ash, so that high-efficiency ash cleaning is ensured.

As shown in fig. 2, the counterweight flap valve 3 includes a flap 31, a counterweight connecting rod 32 and a counterweight 33, the flap 31 is rotatably connected to the counterweight connecting rod 32 through a shaft 35 and a bearing 34, the flap 31 is disposed in an inner cavity of the main ash conveying path 4, the counterweight connecting rod 32 is disposed outside the main ash conveying path, and the counterweight 33 is movably connected to the counterweight connecting rod 32. The balancing weight is installed at the balancing weight connecting rod through fixing bolt, can install and dismantle the balancing weight through fixing bolt. When the absorption tower 1 normally operates, the counterweight connecting rod 32 is in a downward inclined state due to the gravity of the counterweight block 33, the turning plate 31 is in a closed state at the moment, and the turning plate 31 enables the counterweight valve to be kept sealed and closed under the action of the negative pressure of the absorption tower and the counterweight connecting rod.

As shown in fig. 3 and 4, the manual shunt valve 5 includes a fixing plate 51, an operating rod 52, a valve plate 53 and a positioning pin 54, the operating rod 52 is disposed on the outer side of the fixing plate 51, the valve plate 53 is disposed on the inner side of the fixing plate 51, the operating rod 52, the fixing plate 51 and the valve plate 53 are coaxially and rotatably connected, the fixing plate is connected with the ash conveying pipeline, the positioning pin is movably inserted into the operating rod, and a rotating handle may be disposed at the outer end of the positioning pin for facilitating the rotation of the positioning pin. The operating rod is connected with the valve plate through a rotating shaft 55, the rotating shaft penetrates through the fixing plate through the operating rod and then is connected with the valve plate, and the rotating of the operating rod 52 controls the rotating of the valve plate 53, so that the manual switching of the ash discharging channel is realized. When the equipment normally operates, the accumulated ash is discharged to the ash conveying bypass, and in an accident state, the accumulated ash is quickly conveyed and cleaned through the main ash conveying pipe 4 and then through the injection pump 8, so that the pipeline is prevented from being blocked.

An opening degree indicating disc 56 for limiting the rotation angle of the operating rod is further arranged on the outer side of the fixing plate 51, and a positioning hole is formed in the opening degree indicating disc. Because the valve plate only has two working positions, two ends of the opening indicating disc are extreme positions, when the operating rod 52 rotates to the left end of the opening indicating disc 56, the valve plate 53 closes the ash discharging channel of the ash conveying bypass 6, and the main pipeline is opened. When the operating rod 52 rotates to the right end of the opening indicating disc 56, the valve plate rotates to the end of the main pipeline to close the ash discharging channel of the main pipeline and open the ash conveying bypass.

As shown in fig. 5, the star feeder 7 includes a housing 71, a rotor impeller 72 and a motor 73, the rotor impeller 72 is disposed in the housing 71, the rotor impeller is connected to the motor through a transmission mechanism, and the motor controls the rotation of the rotor impeller. The star feeder is not described too much for the existing devices, and mainly plays a role in conveying and preventing the pipeline from being blocked.

When the equipment normally operates, the counterweight flap valve 3 is in a closed state to seal the inner cavity channel of the ash conveying main path 4. When the ash needs to be removed, the operating rod 52 outside the manual bypass valve 5 is rotated, the operating rod 52 rotates and simultaneously drives the valve plate 53 to rotate towards the inner cavity of the ash conveying main pipeline, until the valve plate 53 closes the main ash conveying pipeline, the operating rod does not rotate at the moment, then the position of the operating rod is limited through the positioning pin 54, and the positioning pin 54 penetrates through the through hole in the operating rod and then is matched and fixed with the positioning hole in the opening indicating disc. The firmness of the valve plate 53 is ensured. Then the counterweight flap valve is opened, the counterweight connecting rod 32 moves upwards by disassembling the counterweight block, the flap rotates downwards while the counterweight connecting rod moves upwards, the main ash conveying path is opened at the moment, the accumulated ash in the trapezoidal ash bucket 2 falls to the ash conveying bypass 6 through the inner cavity of the main pipeline, and finally the ash is discharged from the ash conveying bypass to finish the daily ash cleaning work. If meet the absorption tower accident, counter weight flap valve 3 opens, rotates the valve plate to ash conveying bypass end through the action bars of manual shunt valve 5, makes the valve plate close ash conveying bypass passageway, opens ash conveying main road 4 passageway, and accumulational ash block falls through the trunk line from trapezoidal ash bucket, for preventing the pipeline jam, through setting up star feeder 7 and being used for controlling the speed of ash deposition down, guarantees down that the ash passageway is smooth and easy, and the ash deposition through the feeder whereabouts is finally followed the deashing pipeline and is discharged through supporting air conveying fan and jet pump.

The utility model discloses an ash discharging device can carry out different ash discharging modes to the different ash discharging requirements when normal operating and occurence of failure, and the quick clearance deposition possesses the condition of starting machine after the normal operating of assurance system and occurence of failure.

The foregoing is merely illustrative of some of the principles of the present invention and the description is not intended to limit the invention to the specific constructions and applications shown, so that all modifications and equivalents that may be utilized are within the scope of the invention.

Other technical features than those described in the specification are known to those skilled in the art.

Claims (6)

1. The bottom ash discharging device for the semi-dry desulfurization tower of the circulating fluidized bed comprises an ash hopper at the bottom of an absorption tower and is characterized in that an ash conveying main path for conveying accumulated ash is arranged at a discharge port of the ash hopper at the bottom of the absorption tower, an ash conveying bypass is arranged on one side of the ash conveying main path, a manual shunt valve capable of switching an ash discharging channel is arranged at a position where the ash conveying bypass is communicated with an inner cavity of the ash conveying main path and the ash conveying main path is communicated, a counterweight flap valve is arranged on the upper portion of the ash conveying main path, a star-shaped feeder is arranged on the lower portion of the ash conveying main path, and a jet pump capable of quickly discharging the accumulated ash is arranged.

2. The bottom ash discharger of the circulating fluidized bed semidry desulfurization tower as claimed in claim 1, wherein the counterweight flap valve comprises a flap, a counterweight connecting rod and a counterweight block, the flap is rotatably connected with the counterweight connecting rod through a shaft and a bearing, the flap is arranged in the inner cavity of the ash conveying main path, the counterweight connecting rod is arranged outside the ash conveying main path, and the counterweight block is movably connected with the counterweight connecting rod.

3. The bottom ash discharger of the circulating fluidized bed semi-dry desulfurization tower as recited in claim 1, wherein the manual bypass valve comprises a fixed plate, a lever, a valve plate and a positioning pin, the lever is disposed on an outer side of the fixed plate, the valve plate is disposed on an inner side of the fixed plate, the lever, the fixed plate and the valve plate are coaxially and rotatably connected, the fixed plate is connected with a side wall of the ash conveying pipeline, and the positioning pin is movably inserted into the lever.

4. The bottom ash discharger of semi-dry desulfurization tower of claim 3, wherein an opening indicator plate for limiting the rotation angle of the operating rod is further disposed above the fixing plate, the opening indicator plate is provided with a positioning hole in fit connection with the positioning pin, and the opening indicator plate is mounted on the sidewall of the ash conveying pipeline.

5. The bottom ash discharger of semi-dry desulfurization tower of claim 1, wherein the star feeder comprises a housing, a rotor impeller and a motor, the rotor impeller is disposed in the housing, the rotor impeller is connected to the motor through a transmission mechanism, and the motor controls the rotation of the rotor impeller.

6. The bottom ash discharger of semi-dry desulfurization tower of claim 1, wherein one end of the jet pump is provided with a pneumatic blower interface, and the other end is provided with an interface connected to an ash conveying pipeline.

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