CN212320840U - Novel cement kiln denitration ash bucket material level monitoring device - Google Patents
Novel cement kiln denitration ash bucket material level monitoring device Download PDFInfo
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- CN212320840U CN212320840U CN202020637918.8U CN202020637918U CN212320840U CN 212320840 U CN212320840 U CN 212320840U CN 202020637918 U CN202020637918 U CN 202020637918U CN 212320840 U CN212320840 U CN 212320840U
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Abstract
The utility model aims at providing a novel cement kiln denitration ash bucket material level monitoring device, which is used for monitoring the ash bucket material level under the high-temperature and high-dust environment, and comprises a first pressure transmitter detection device for detecting the pressure inside the ash bucket, the pressure transmitter detection device comprises a delivery pipe, a pressure guiding pipe and a pressure transmitter, one end of the delivery pipe is communicated with the ash bucket, the other end is sealed, one end of the pressure guiding pipe is connected with the delivery pipe wall through a hole arranged on the delivery pipe wall, the other end of the pressure guiding pipe is connected with the input end of the pressure transmitter, the output end of the pressure transmitter is connected with the input end of the PLC, the output end of the PLC is connected with the input end of the ash unloading valve, the pressure transmitter monitoring devices are respectively arranged at the high and low positions of the ash bucket, the change of the pressure inside the ash bucket is transmitted to the pressure transmitter through the pressure guiding pipe, the PLC sends a control command to the ash, can be normally used under the condition of high temperature.
Description
Technical Field
The utility model belongs to the technical field of the SCR denitration, concretely relates to novel cement kiln denitration ash bucket material level monitoring device.
Background
The research on the SCR denitration technology in the domestic cement industry is less, but the SCR technology is widely applied to the thermal power industry. Although the characteristics of the smoke of the two are greatly different, particularly, the dust content and the temperature of the cement industry are greatly higher than those of the thermal power industry, and the cement industry has the characteristics of high dust and high temperature, the common ash bucket level indicator is a contact type level indicator, the ash bucket level indicator penetrates through an ash bucket and is inserted into the wall of the ash bucket, the output end of the ash bucket level indicator is connected with the input end of a PLC, the output end of the PLC is connected with the input end of an ash discharge valve, one or two ash bucket level indicators can be selectively arranged, when only one ash bucket level indicator is arranged, the ash in the ash bucket reaches a certain height and is contacted with the level indicator, the level indicator sends a signal to the PLC, the ash discharge valve is opened to discharge ash, when the ash discharge time reaches the preset duration, the ash discharge valve is closed, but because the temperature is too high, a level indicator sensor belongs to an electronic component, and is easy to damage under the high temperature condition, so that the display is inaccurate or even, however, the quality is not guaranteed under long-term high-temperature conditions, and problems still occur.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a novel cement kiln denitration ash bucket material level monitoring devices for monitor the ash bucket material level under the high dust environment of high temperature.
The technical proposal of the utility model for solving the technical problem is that: the utility model provides a novel cement kiln denitration ash bucket material level monitoring device, includes ash bucket, unloading valve, PLC's input and ash bucket charge level indicator's output are connected, PLC's output and the input of unloading valve are connected its characterized in that: still including the first pressure transmitter detection device who is used for detecting the inside pressure of ash bucket, pressure transmitter detection device includes contact tube, draws and presses pipe, pressure transmitter, contact tube one end and ash bucket intercommunication, the other end seals, the one end that draws and presses the pipe is connected with the derivation pipe wall through seting up in the hole of deriving the pipe wall, the other end that draws and presses the pipe is connected with pressure transmitter's input, pressure transmitter's output is connected with PLC's input, PLC's output and the input of unloading the grey valve are connected.
In order to monitor the material level more accurately, the device also comprises a second pressure transmitter detection device, the delivery pipes of the first and second pressure transmitter detection devices are respectively communicated with the ash bucket wall, and the height of the delivery pipes of the first and second pressure transmitter detection devices is set.
In order to avoid high concentration and high viscosity dust to make pressure transmitter detection device block up, still include pressure transmitter blowback device, pressure transmitter blowback device includes compressed air storage tank, first needle type valve, the compressed air storage tank passes through needle type valve and draws pressure pipe intercommunication.
In order to avoid the pressure transmitter blowback device to blow the dust to pressure transmitter and protect pressure transmitter under emergency by mistake when carrying out the blowback to the dust, be provided with the second needle type valve on the pressure pipe of pressure transmitter link to first needle type valve and the pressure pipe link between.
In order to prevent the second needle valve from having a protective effect due to effectiveness or failure while the second needle valve is closed to protect the pressure transmitter in an emergency, a third needle valve is arranged on a pressure guiding pipe between the second needle valve and the delivery pipe.
In order to facilitate the on-site patrol personnel to find problems and also to verify that the pressure transmitter shows an error, the closed end of the delivery tube is closed by a manual valve.
The delivery pipe of the first pressure transmitter detection device is arranged on the side wall which is 0.5m away from the upper end face of the ash bucket, and the delivery pipe of the second pressure transmitter detection device is arranged on the side wall which is 0.5m away from the lower end face of the ash bucket.
The utility model has the advantages that: the PLC sends a control command to the ash discharging valve according to the pressure of the two sets of pressure transmitter detection devices, and the ash discharging valve can still be normally used under the high-temperature condition; the pressure transmitter back-blowing device is arranged to regularly back-blow the pressure leading pipe, so that the normal operation of the pressure transmitter monitoring device is ensured; the closed end of the delivery pipe is closed through a manual valve, so that field inspectors can find problems conveniently, the inspectors approach the pipeline by hands, if suction force is felt, the situation is that no ash exists, and if the suction force is not felt, the situation is that ash exists.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an electrical connection schematic of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the utility model discloses an ash bucket 1, unloading valve 2, PLC's input and ash bucket charge level indicator 3's output are connected, PLC's output and unloading valve 2's input are connected, still including the pressure transmitter detection device who is used for detecting 1 inside pressure of ash bucket, pressure transmitter detection device includes contact tube 4, pressure pipe 5, pressure transmitter 6, contact tube 4 one end and ash bucket 1 intercommunication, the other end seals, the one end of pressure pipe 5 is pegged graft with contact tube 4 wall through the hole of seting up at contact tube 4 wall, the other end of pressure pipe 5 is connected with pressure transmitter 6's input, pressure transmitter 6's output is connected with PLC's input, PLC's output and unloading valve 2's input are connected.
Still include second pressure transmitter detection device, first, second pressure transmitter detection device's contact tube 4 communicates with ash bucket wall respectively, first, second pressure transmitter detection device's contact tube 4 height sets up.
In order to avoid high concentration and high viscosity dust to make pressure transmitter detection device block up, still include pressure transmitter blowback device, pressure transmitter blowback device includes compressed air storage tank 7, first needle type valve 8, compressed air storage tank 7 passes through the needle type valve and draws and press pipe 5 intercommunication, the utility model discloses an air supply is got from compressed air storage tank 7, and air supply pressure is 0.6~0.8MPa, can provide sufficient power and carry out the blowback, ensures to sweep the effect, and when sweeping, opens first needle type valve 8.
In order to avoid the pressure transmitter blowback device to blow the dust to pressure transmitter 6 and protect pressure transmitter 6 under emergency by mistake when carrying out the blowback to the dust, be provided with second needle valve 9 on the pressure pipe 5 of the 6 link of pressure transmitter to the first needle valve 8 and the pressure pipe 5 link between the pressure pipe 5 link.
In order to protect the pressure transmitter 6 by closing the second needle valve 9 in an emergency and to prevent the second needle valve 9 from failing to protect due to failure or malfunction, a third needle valve 10 is disposed on the pressure guiding pipe 5 between the second needle valve 9 and the delivery pipe 4.
In order to facilitate the on-site patrol personnel to find problems and verify whether the pressure transmitter 6 displays errors or not, the closed end of the delivery pipe 4 is closed by the manual valve 11, the manual valve 11 is opened, the hand is close to the delivery pipe 4, and if suction force is sensed, no ash exists; if no suction is sensed, this indicates that there is ash.
The delivery pipe 4a of the first pressure transmitter detection device is arranged on the side wall 0.5m away from the upper end face of the ash bucket 1, and the delivery pipe 4b of the second pressure transmitter detection device is arranged on the side wall 0.5m away from the lower end face of the ash bucket 1.
In the specific use process, the first pressure transmitter detection device is used for detecting a high material level, and the second pressure transmitter detection device is used for detecting a low material level.
Because the space in the ash bucket 1 is positioned in front of the high-temperature fan, the interior of the ash bucket 1 is in a negative pressure state when no ash exists, when ash exists, the pressure transmitter 6 connected with the delivery pipe 4 and the pressure introduction pipe 5 detects that the pressure at the pressure is zero or a deviation value, the ash discharge valve 2 is operated by utilizing the principle and the pressure values displayed by the two sets of pressure transmitter detection devices, when the ash in the ash bucket 1 is below a low material level, the pressure transmitter 6 used for detecting the high material level and the low material level can display larger negative pressure, and the PLC sends an instruction to stop the operation of the ash discharge valve 2; when the ash in the ash hopper 1 is positioned between the low material level and the high material level (including the ash positioned at the low material level), the pressure transmitter 6 for detecting the high material level displays larger negative pressure, the pressure transmitter 6 for detecting the low material level displays zero or a bias value, and the PLC sends an instruction at the moment to keep the current state of the ash discharge valve 2; when the ash in the ash hopper 1 is just positioned at the high material level or above the high material level, the pressure transmitter 6 for detecting the high material level and the low material level displays zero or a deviation value, and the PLC sends an instruction to open the ash discharge valve 2.
If only one set of pressure transmitter detection device is used, the control mode is the same as that of the original ash hopper level indicator 3, namely when the ash in the ash hopper reaches the position of the delivery pipe 4 or above, the pressure transmitter 6 displays zero or a deviation value, the PLC sends an instruction at the moment, the ash discharge valve 2 is opened, and after the preset ash discharge duration is reached, the PLC controls the ash discharge valve 2 to be closed.
The PLC sends a control command to the ash discharging valve according to the pressure of the two sets of pressure transmitter detection devices, and the ash discharging valve can still be normally used under the high-temperature condition; the pressure transmitter back-blowing device is arranged to regularly back-blow the pressure leading pipe, so that the normal operation of the pressure transmitter monitoring device is ensured; the closed end of the delivery pipe is closed through a manual valve, so that field inspectors can find problems conveniently, the inspectors approach the pipeline by hands, if suction force is felt, the situation is that no ash exists, and if the suction force is not felt, the situation is that ash exists.
Claims (7)
1. The utility model provides a novel cement kiln denitration ash bucket material level monitoring device, includes ash bucket, unloading valve, PLC's input and ash bucket charge level indicator's output are connected, PLC's output and the input of unloading valve are connected its characterized in that: still including the first pressure transmitter detection device who is used for detecting the inside pressure of ash bucket, pressure transmitter detection device includes contact tube, draws and presses pipe, pressure transmitter, contact tube one end and ash bucket intercommunication, the other end seals, the one end that draws and presses the pipe is connected with the derivation pipe wall through seting up in the hole of deriving the pipe wall, the other end that draws and presses the pipe is connected with pressure transmitter's input, pressure transmitter's output is connected with PLC's input, PLC's output and the input of unloading the grey valve are connected.
2. The novel cement kiln denitration ash bucket material level monitoring device as claimed in claim 1, characterized in that: still include second pressure transmitter detection device, first, second pressure transmitter detection device's contact tube communicates with ash bucket wall respectively, first, second pressure transmitter detection device's contact tube height sets up.
3. The novel cement kiln denitration ash bucket material level monitoring device as claimed in claim 1, characterized in that: still include pressure transmitter blowback device, pressure transmitter blowback device includes compressed air storage tank, first needle type valve, the compressed air storage tank passes through needle type valve and draws pressure pipe intercommunication.
4. The novel cement kiln denitration ash bucket material level monitoring device as claimed in claim 3, characterized in that: and a second needle valve is arranged on the pressure guiding pipe between the connecting end of the pressure transmitter and the connecting end of the first needle valve and the pressure guiding pipe.
5. The novel cement kiln denitration ash bucket material level monitoring device as claimed in claim 4, characterized in that: and a third needle valve is arranged on the pressure guiding pipe between the second needle valve and the delivery pipe.
6. The novel cement kiln denitration ash bucket material level monitoring device as claimed in claim 1, characterized in that: the closed end of the delivery pipe is provided with a manual valve.
7. The novel cement kiln denitration ash bucket material level monitoring device as claimed in claim 2, characterized in that: the delivery pipe of the first pressure transmitter detection device is arranged on the side wall which is 0.5m away from the upper end face of the ash bucket, and the delivery pipe of the second pressure transmitter detection device is arranged on the side wall which is 0.5m away from the lower end face of the ash bucket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020637918.8U CN212320840U (en) | 2020-04-24 | 2020-04-24 | Novel cement kiln denitration ash bucket material level monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020637918.8U CN212320840U (en) | 2020-04-24 | 2020-04-24 | Novel cement kiln denitration ash bucket material level monitoring device |
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| CN212320840U true CN212320840U (en) | 2021-01-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114984667A (en) * | 2022-06-08 | 2022-09-02 | 北票发电有限责任公司 | Negative pressure dust removal device and method thereof |
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2020
- 2020-04-24 CN CN202020637918.8U patent/CN212320840U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114984667A (en) * | 2022-06-08 | 2022-09-02 | 北票发电有限责任公司 | Negative pressure dust removal device and method thereof |
| CN114984667B (en) * | 2022-06-08 | 2024-04-23 | 北票发电有限责任公司 | Negative pressure dust removing device and method thereof |
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