CN219573197U - Dust hopper material level detection device of dust remover for semi-dry desulfurization of circulating fluidized bed - Google Patents
Dust hopper material level detection device of dust remover for semi-dry desulfurization of circulating fluidized bed Download PDFInfo
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Abstract
The utility model discloses a dust catcher ash bucket material level detection device for semi-dry desulfurization of a circulating fluidized bed, relates to the technical field of semi-dry flue gas desulfurization of the circulating fluidized bed, and aims to solve the problems that the existing material level detection equipment is not simple enough and the system operation is possibly affected; the utility model comprises a dust catcher ash bucket, wherein the lower end of the dust catcher ash bucket is provided with an ash bucket fluidization groove, the lower end of the dust catcher ash bucket is connected with a fluidization air pipe at intervals, a plurality of fluidization air pipes are respectively communicated with the same main air pipe, the end part of the main air pipe is connected with a Roots blower for providing fluidization air, a heat exchanger and a pressure transmitter are arranged on the main air pipe, wherein the heat exchanger is used for heating the fluidization air, and the pressure transmitter is used for detecting the pressure of the main air pipe so as to correspondingly obtain the height of a material layer in the dust catcher ash bucket; the utility model has simple and reasonable structure, combines the fluidization air system with the material level detection system, saves the installation space, reduces the investment and the operation cost, is convenient to install and overhaul, and can meet the long-term stable and safe operation requirement of the dust remover.
Description
Technical Field
The utility model relates to the technical field of semi-dry flue gas desulfurization of a circulating fluidized bed, in particular to a dust hopper material level detection device of a dust remover for semi-dry flue gas desulfurization of a circulating fluidized bed.
Background
With the continuous progress of ultra-low emission reformation in the national advanced steel industry, the circulating fluidized bed flue gas desulfurization technology has the characteristics of simple process flow, high desulfurization efficiency, less investment, low operation cost, good adaptability, no secondary pollution and the like, is widely applied to the treatment of sintered pellet flue gas, and a dust remover serving as core equipment is arranged behind an absorption tower for gas-solid separation of flue gas, so that the standard emission of flue gas particles is ensured.
The circulating fluidized bed semi-dry desulfurization dust remover generally adopts a ship-shaped ash bucket, most of the desulfurization ash collected by the ash bucket returns to the desulfurization tower through an air chute, and a small part of the desulfurization ash is discharged. Conventionally, the material level of a dust hopper of a dust remover is detected by a high level gauge and a low level gauge to control the discharge of the desulfurized ash, when the material level of the high level gauge of the dust hopper reaches the high material level, an outer ash discharge valve is started to discharge the desulfurized ash, and when the material level of the low level gauge of the dust hopper reaches the low material level, the ash discharge valve is closed. However, in the actual process, because the viscosity of the desulfurized ash is high, the ash is not easy to peel off due to adhesion to the bin level meter, so that the bin level meter is inaccurate in measurement, and misoperation is often caused. Therefore, the high-level alarm of the ash bucket material layer does not occur, ash flows through the cloth bag, or the low-level alarm of the ash bucket material layer does not occur, and the outside atmosphere flows back into the ash bucket, so that the ash deposition of the ash bucket of the dust remover and the ash level exceed the normal operation control value and even the design value, the normal operation of the dust remover is seriously affected, and serious potential safety hazards are generated.
In the patent application of the utility model with the publication number of CN109200798A, named as a detection device for the ash bucket material level of a semi-dry desulfurization dust remover and a use method, a detection pipe is arranged on the ash bucket of the dust remover, a fluidization air pipe, a pressure pipe, a bypass pipe and a compressed air pipe are arranged on the detection pipe, compressed air is introduced into the detection pipe, when the ash level overflows the detection pipe, the pressure is increased, and when the ash level is lower than the detection pipe, the pressure is reduced, and the height of the material level is judged through the change of the pressure; the material level detection device in the form is complex in system, a set of material level detection device is required to be arranged at each detection point, equipment fault points are many, overhaul and operation are inconvenient, the material level of the ash bucket cannot be detected in real time, investment and operation cost are high, and in addition, flue gas condensation is easily caused by spraying normal-temperature compressed air into the ash bucket to cause desulfurized ash agglomeration, so that the operation of the system is influenced. Therefore, a dust hopper level detection device of a dust remover for semi-dry desulfurization of a circulating fluid bed is needed to solve the problems.
Disclosure of Invention
The utility model aims to provide a dust hopper material level detection device of a dust remover for semi-dry desulfurization of a circulating fluidized bed, which aims to solve the problems that the existing material level detection equipment is not simple enough and the system operation is possibly affected.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a circulating fluidized bed semi-dry desulfurization is with dust remover ash bucket material level detection device, including the dust remover ash bucket, the lower extreme of dust remover ash bucket is equipped with the ash bucket fluidization groove, its lower extreme is connected with a fluidization tuber pipe every one section distance, a plurality of fluidization tuber pipes communicate respectively to same root main tuber pipe, main tuber pipe end connection has the roots fan to be used for providing the fluidization wind, still be equipped with heat exchanger and pressure transmitter on the main tuber pipe, wherein the heat exchanger is used for heating the fluidization wind, pressure transmitter is used for detecting main tuber pipe pressure in order to correspond the bed of material height that obtains in the dust remover ash bucket.
Preferably, one end of the main air pipe far away from the Roots blower is connected with a fluidization air distributor, and a plurality of fluidization air pipes are respectively connected with air outlets of the fluidization air distributor.
Preferably, the ash bucket fluidization groove is formed by detachably and fixedly connecting a plurality of chute sections through flanges, the length of each chute section is not more than 1.5m, and each fluidization air pipe is respectively connected to the lower end of the middle part of each chute section.
Preferably, a fluidization cloth is fixedly arranged between the chute and the ash bucket of the dust remover, and the fluidization air pipe is a transparent pipe body and is used for observing whether desulfurization ash exists or not so as to judge the damage condition of the fluidization cloth.
Preferably, the transparent tube body is a hose with the length of 120-180mm.
Preferably, a flow regulating valve is arranged on the fluidization air pipe.
Preferably, a silencer is further arranged on the main air pipe, which is positioned close to the Roots blower, for noise reduction.
Preferably, the pressure of the Roots blower is 10-60KPa, and the measuring range of the pressure transmitter is 0-100KPa; the heat exchanger is a steam heater, and the temperature of the fluidized wind at the outlet end of the heat exchanger is 80-120 ℃.
Preferably, the unbalanced rate of the air quantity of the fluidization air distributor entering each fluidization air pipe is less than 5%.
Compared with the prior art, the utility model has the beneficial effects that:
1. the Roots blower can provide nearly constant air quantity, so that the ash bucket can be ensured to have stable and reliable fluidization air, and after the fluidization air enters the ash bucket of the dust remover, the pressure difference can be caused due to the difference of the internal material quantity, and the ash bucket material level detection device of the dust remover for semi-dry desulfurization of the circulating fluidized bed can continuously judge the ash bucket material level condition in real time by detecting the pressure information condition of the main air pipe.
2. The dust hopper material level detection device of the dust remover for semi-dry desulfurization of the circulating fluidized bed skillfully combines the fluidization air system with the material level detection system, and only uses one set of system to realize two functions, thereby saving installation space, reducing investment and operation cost, being convenient to install and overhaul and meeting the long-term stable and safe operation requirement of the dust remover.
3. The dust catcher ash bucket material level detection device for the semi-dry desulfurization of the circulating fluidized bed combines the characteristics of high humidity, high viscosity and the like of the semi-dry desulfurization ash of the circulating fluidized bed, adopts hot fluidization wind to replace compressed air, reduces the risk of condensation of the ash bucket, and can further ensure the stable and reliable system operation.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
In the figure: 1. roots blower; 2. a muffler; 3. a heat exchanger; 4. a pressure transmitter; 5. dust hopper of dust remover; 6. an ash bucket fluidization groove; 7. a fluidization air duct; 8. a fluidization wind distributor.
Detailed Description
As shown in figure 1, the dust hopper material level detection device for the semi-dry desulfurization of the circulating fluidized bed comprises a dust hopper 5, wherein the lower end of the dust hopper 5 is provided with a dust hopper fluidization groove 6, the lower end of the dust hopper is connected with a fluidization air pipe 7 at intervals, a plurality of fluidization air pipes 7 are respectively communicated with the same main air pipe, the end part of the main air pipe is connected with a Roots blower 1 for providing fluidization air, the pressure of the fluidization air can be 10-60KPa, a heat exchanger 3 and a pressure transmitter 4 are also arranged on the main air pipe, the heat exchanger 3 is used for heating the fluidization air, in particular a steam heater, the temperature of the fluidization air at the outlet end of the heat exchanger is preferably 80-120 ℃, so that the fluidization air entering the dust hopper is not lower than the dew point of flue gas, the desulfurization ash hardening is avoided, the pressure transmitter 4 is used for detecting the pressure of the main air pipe to correspondingly obtain the material level in the dust hopper 5, and the range of the fluidization air is preferably 0-100KPa.
In a preferred embodiment, one end of the main air pipe far away from the Roots blower 1 is connected with a fluidization air distributor 8, a plurality of fluidization air pipes 7 are respectively connected with air outlets of the fluidization air distributor 8, when fluidization air passes through the fluidization air distributor 8, the fluidization air quantity of each fluidization air pipe 7 can be ensured to be approximately equal through the balance of resistance, and further, the unbalanced rate of the air quantity of each fluidization air pipe 7 entering the fluidization air distributor 8 is less than 5%; the fluidized air distributor 8 can be a common gas/air source distributor/diverter/distributor in the market, and preferably adopts a model capable of adjusting the air quantity of each air outlet.
The ash bucket fluidization groove 6 can be formed by detachably and fixedly connecting a plurality of chute sections through flanges, the length of each chute section is not more than 1.5m, and each fluidization air pipe 7 is respectively connected to the lower end of the middle part of each chute section, so that the installation, the disassembly, the maintenance, the repair, the replacement and the like are convenient; further, a fluidization cloth is fixedly arranged between the chute and the ash bucket 5 of the dust remover, the fluidization air pipe 7 is a transparent pipe body for observing whether desulfurized ash exists or not to judge the damage condition of the fluidization cloth, and specifically, the transparent pipe body can be a hose, and the length of the transparent pipe body can be generally set to be 120-180mm.
Besides the fluidization air distributor 8, a flow regulating valve can be arranged on the fluidization air pipes 7, or the fluidization air distributor 8 and the flow regulating valve are adopted at the same time, so that the flow of each fluidization air pipe 7 is regulated more finely, the flow of each fluidization air pipe 7 is balanced as much as possible, and the main purpose is to stabilize the working condition in the dust hopper 5 of the dust remover as much as possible.
In order to reduce system noise, a silencer 2 can be arranged on the main air pipe near the Roots blower 1.
Examples:
the material level detecting device adopting the preferable scheme in the embodiment, wherein:
the pressure of the Roots blower is 40KPa,
the steam heater heats the fluidizing air to 100 c,
the maximum range of the pressure transmitter is 60KPa, the unbalanced rate of the air quantity of the fluidization air distributor entering each fluidization air pipe is 3.5%,
the ash bucket fluidization groove is provided with 6 sections of chute, the length of each section of chute is 1.2m,
the fluidization air pipe is a 150mm long transparent rubber pipe;
the device is adopted for multiple tests, and the pressure conditions under different material levels are recorded as shown in the following table 1:
table 1: empirical data comparison table for material level and average fluidization wind pressure
| Material level | Average fluidization wind pressure |
| 0 meter | 4KPa |
| 1.5m | 11KPa |
| 2 meters | 13KPa |
| 3 meters | 18KPa |
| 4 m | 24KPa |
| 5m | 29KPa |
| 6.5 meters | 36KPa |
And then, in the operation process, carrying out a manual experience estimation according to the pressure condition and the table, and actually measuring whether the comparison estimation condition is accurate or not, wherein the comparison result is shown in the following table 2:
table 2: level estimation result and actual result comparison table
| Fluidization wind pressure | Estimating a filling level | Actual material level |
| 4KPa | 0 meter | 0 meter |
| 10KPa | 1.3 meters | 1.2 meters |
| 13KPa | 2 meters | 2 meters |
| 17KPa | 2.8 meters | 2.8 meters |
| 23KPa | 3.8 meters | 3.9 meters |
| 31KPa | 5.4 meters | 5.4 meters |
| 36KPa | 6.5 meters | 6.5 meters |
In actual work, the dust hopper of the dust remover has a material level up-down warning value, and the safety production can still be kept as long as the warning value is not exceeded too much, so that the error of the method can meet the production requirement.
The method in the embodiment can record an empirical average fluidization wind pressure value every 0.1 meter of material level, and is more accurate in comparison with estimation; in addition, the curve fitting can be tried by software such as python according to a material level-average fluidization wind pressure empirical data comparison table, and the corresponding material level height can be found by a fitting curve according to the measured pressure value in operation; or after a large amount of data is used for neural network learning by matlab, outputting corresponding material level results and the like by inputting pressure values into the obtained model; these specific data processing methods described above are not the focus of the present utility model, but these methods cannot deviate from the conceptual basis of the present utility model of a level detection device that uses the fluidization air pipe pressure value as a level reflection value.
The above is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present utility model should be covered by the present utility model. Therefore, the protection scope of the present utility model should be defined by the claims.
The present utility model is not described in detail in the present application, and is well known to those skilled in the art.
Claims (9)
1. The utility model provides a circulating fluidized bed semi-dry desulfurization is with dust remover ash bucket material level detection device, includes dust remover ash bucket (5), its characterized in that: the lower extreme of dust remover ash bucket (5) is equipped with ash bucket fluidization groove (6), and its lower extreme is connected with a fluidization tuber pipe (7) every one section distance, and many fluidization tuber pipes (7) communicate respectively to same root main tuber pipe, and main tuber pipe end connection has roots's fan (1) to be used for providing the fluidization wind, still is equipped with heat exchanger (3) and pressure transmitter (4) on the main tuber pipe, and wherein heat exchanger (3) are used for heating the fluidization wind, and pressure transmitter (4) are used for detecting main tuber pipe pressure in order to correspond the bed of material height that obtains in dust remover ash bucket (5).
2. The dust catcher hopper level detection device for semi-dry desulfurization of a circulating fluidized bed according to claim 1, wherein: one end of the main air pipe, which is far away from the Roots blower (1), is connected with a fluidization air distributor (8), and a plurality of fluidization air pipes (7) are respectively connected with air outlets of the fluidization air distributor (8).
3. The dust catcher hopper level detection device for semi-dry desulfurization of a circulating fluidized bed according to claim 1, wherein: the ash bucket fluidization groove (6) is formed by detachably and fixedly connecting a plurality of chute sections through flanges, the length of each chute section is not more than 1.5m, and each fluidization air pipe (7) is respectively connected to the lower end of the middle part of each chute section.
4. A circulating fluidized bed semi-dry desulfurization dust remover ash bucket material level detection device as defined in claim 3, wherein: a fluidization cloth is fixedly arranged between the chute and the ash bucket (5) of the dust remover, and the fluidization air pipe (7) is a transparent pipe body and is used for observing whether desulfurization ash exists or not to judge the damage condition of the fluidization cloth.
5. The dust catcher hopper level detection device for semi-dry desulfurization of a circulating fluidized bed according to claim 4, wherein: the transparent tube body is a hose, and the length of the hose is 120-180mm.
6. The dust catcher hopper level detection device for semi-dry desulfurization of a circulating fluidized bed according to claim 1, wherein: the fluidization air pipe (7) is provided with a flow regulating valve.
7. The dust catcher hopper level detection device for semi-dry desulfurization of a circulating fluidized bed according to claim 1, wherein: and a silencer (2) is further arranged on the main air pipe and is positioned close to the Roots blower (1) for noise reduction.
8. The dust catcher hopper level detection device for semi-dry desulfurization of a circulating fluidized bed according to claim 1, wherein: the pressure of the Roots blower (1) is 10-60KPa, and the measuring range of the pressure transmitter (4) is 0-100KPa; the heat exchanger (3) is a steam heater, and the temperature of the fluidized wind at the outlet end of the heat exchanger is 80-120 ℃.
9. The dust catcher hopper level detection device for semi-dry desulfurization of a circulating fluidized bed according to claim 2, wherein: the unbalanced rate of the air quantity of the fluidization air distributor (8) entering each fluidization air pipe (7) is less than 5 percent.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320571801.8U CN219573197U (en) | 2023-03-22 | 2023-03-22 | Dust hopper material level detection device of dust remover for semi-dry desulfurization of circulating fluidized bed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320571801.8U CN219573197U (en) | 2023-03-22 | 2023-03-22 | Dust hopper material level detection device of dust remover for semi-dry desulfurization of circulating fluidized bed |
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