CN216281316U - Automatic boiler - Google Patents
Automatic boiler Download PDFInfo
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- CN216281316U CN216281316U CN202122807082.9U CN202122807082U CN216281316U CN 216281316 U CN216281316 U CN 216281316U CN 202122807082 U CN202122807082 U CN 202122807082U CN 216281316 U CN216281316 U CN 216281316U
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- deaerator
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Abstract
The utility model discloses an automatic boiler which comprises a boiler body, wherein a deaerator liquid level meter is installed in the deaerator, and a deaerator self-regulating valve is arranged on a water outlet pipe at the bottom of the deaerator; a steam drum liquid level meter is arranged in the steam drum, and a steam drum regulating valve is arranged on the steam drum water inlet pipe; a medium-pressure branch pipe pressure transmitter and a medium-pressure branch pipe automatic valve are arranged on the medium-pressure branch pipe connected with the superheater; a low-pressure branch pipe pressure transmitter and a low-pressure branch pipe automatic valve are arranged on the low-pressure branch pipe connected with the superheater; and a fan pressure transmitter and a fan automatic regulating valve are arranged at the outlet of the fan. And the DCS central control system compares the received signal with a set value, and then automatically controls and adjusts each valve, so that each parameter of the system meets the process standard. The utility model monitors and controls each loop of the boiler in a centralized way, improves the automation degree of the boiler system, reduces the labor intensity of staff and effectively processes accidents in time.
Description
The technical field is as follows:
the utility model relates to automatic control boiler equipment, in particular to an automatic boiler controlled by a DCS (distributed control system).
Background art:
the DCS control system is a new generation of instrument control system which is based on a microprocessor and adopts the design principle of decentralized control function, centralized display operation, and consideration of both sub-autonomous and comprehensive coordination. The basic design idea of control decentralization, operation and management centralization enables the DCS system to have unique advantages in the system control of complex and decentralized systems.
The boiler system is provided with a plurality of loops such as steam drum water level, steam pressure, exhaust gas temperature, deoxygenation water level and the like, and each loop needs to be controlled by a valve so as to ensure that each parameter in the system is in a reasonable interval; at present, fewer devices are used for realizing boiler automation by adopting a DCS control system, most of the functions of the automatic system are mainly concentrated on a monitoring part, valves and loops are not controlled much and are not stable, each loop is independent in the control process, most of the valves still need to be operated on site, and therefore the economic, stable and safe operation of the boiler is influenced.
The utility model has the following contents:
the utility model aims to provide an automatic boiler which adopts DCS control to realize automatic control.
The utility model is implemented by the following technical scheme:
the automatic boiler comprises a boiler main body, wherein the boiler main body comprises a deaerator, a steam pocket, a water feeding pump, an economizer, a superheater, a cyclone separator and a flue; a deaerator liquid level meter is installed in the deaerator, and a deaerator self-regulating valve is arranged on a water outlet pipe at the bottom of the deaerator; a steam drum liquid level meter is arranged in the steam drum, and a steam drum regulating valve is arranged on the steam drum water inlet pipe; a medium-pressure branch pipe pressure transmitter is arranged on a medium-pressure branch pipe connected with the superheater, and an automatic medium-pressure branch pipe valve is arranged on the medium-pressure branch pipe; a low-pressure branch pipe pressure transmitter is arranged on a low-pressure branch pipe connected with the superheater, and a low-pressure branch pipe automatic valve is arranged on the low-pressure branch pipe; a fan pressure transmitter and a fan automatic regulating valve are arranged at the outlet of the fan; the deaerator liquid level meter, the deaerator self-regulating valve, the steam pocket liquid level meter, the steam pocket regulating valve, the medium-pressure branch pipe pressure transmitter, the medium-pressure branch pipe automatic valve, the low-pressure branch pipe pressure transmitter, the low-pressure branch pipe automatic valve, the fan pressure transmitter and the fan automatic regulating valve are all electrically connected with a DCS (distributed control system); the deaerator liquid level meter and the steam drum liquid level meter send corresponding liquid level signals of the deaerator and the steam drum to the DCS, the medium-pressure branch pipe pressure transmitter and the low-pressure branch pipe pressure transmitter send corresponding pressure signals of the medium-pressure branch pipe and the low-pressure branch pipe to the DCS, and the fan pressure transmitter sends a fan outlet pressure signal to the DCS; and the DCS central control system compares the received signal with a set value and then controls the opening and closing sizes of the deaerator self-regulating valve, the steam pocket regulating valve, the medium-pressure branch pipe automatic valve, the low-pressure branch pipe automatic valve and the fan automatic regulating valve, so that the deaerator, the liquid level signal of the steam pocket and the fan outlet pressure signal are in a set value range, and the pressure signals of the medium-pressure branch pipe and the low-pressure branch pipe are smaller than the set value.
Preferably, the set value of the liquid level of the steam drum in the DCS is between +50mm and-50 mm.
Preferably, the set value of the liquid level of the deaerator in the DCS is 50% -80% of the normal liquid level.
Preferably, the pressure set value of the medium-pressure branch pipe in the DCS is 3.96 Mpa.
Preferably, the pressure set value of the low-pressure branch pipe in the DCS is 0.65 MPa.
Preferably, the set value of the outlet pressure of the fan in the DCS is 20-23 Kpa.
The utility model has the advantages that: the boiler loop and the loop valve are controlled by using the DCS control system, all controlled objects and process parameters in a control point range are monitored in the control system in a centralized manner, and operators start and stop equipment in the centralized control chamber by controlling the valve to open and close through the DCS and according to parameter conditions, so that the automation degree of the boiler system is improved, the labor intensity of workers can be reduced, accidents can be handled effectively in time, and the expansion of the accidents is avoided.
Description of the drawings:
fig. 1 is an overall structural view of the present invention.
Fig. 2 is a control system diagram of the present invention.
The boiler comprises a boiler main body 1, a deaerator 2, a deaerator liquid level meter 21, a deaerator self-regulating valve 22, a steam drum 3, a steam drum liquid level meter 31, a steam drum regulating valve 32, a DCS central control system 4, a medium-pressure branch pipe 5, a medium-pressure branch pipe pressure transmitter 51, a medium-pressure branch pipe automatic valve 52, a medium-pressure using end 53, a low-pressure branch pipe 6, a low-pressure branch pipe pressure transmitter 61, a low-pressure branch pipe automatic valve 62, a pressure reducing valve 63, a low-pressure using end 64, a fan 7, a fan pressure transmitter 71, a fan automatic regulating valve 72, a water feeding pump 8, an economizer 9, a superheater 10, a cyclone separator 11 and a flue 12.
The specific implementation mode is as follows:
example (b):
the automatic boiler shown in fig. 1 and 2 comprises a boiler main body 1, a deaerator 2, a steam drum 3, a DCS central control system 4, a medium-pressure branch pipe 5, a low-pressure branch pipe 6, a fan 7, a feed water pump 8, an economizer 9, a superheater 10, a cyclone separator 11 and a flue 12; a deaerator liquid level meter 21 is installed in the deaerator 2, and a deaerator self-regulating valve 22 is arranged on a water outlet pipe at the bottom of the deaerator 2; a steam drum liquid level meter 31 is arranged in the steam drum 3, and a steam drum regulating valve 32 is arranged on a steam drum water inlet pipe; the deaerator liquid level meter 21 and the drum liquid level meter 31 respectively send corresponding liquid level signals of the deaerator 2 and the drum 3 to the DCS central control system 4, and the DCS central control system 4 compares the liquid level signals with a set value and then controls the opening and closing sizes of the deaerator self-regulating valve 22 and the drum regulating valve 32 to enable the liquid level signals of the deaerator 2 and the drum 3 to be within the set value range; wherein the set value of the liquid level of the steam drum 3 is between +50mm and-50 mm; the set value of the liquid level of the deaerator 2 is 50% -80% of the normal liquid level, the height of the deaerator liquid level meter 21 is 1.8 m, the normal liquid level is 50% -80%, namely 900mm-1440mm, when the water level is higher than 1440mm, the deaerator self-regulating valve 22 is automatically opened, and when the water level is lower than 900mm, the deaerator self-regulating valve is automatically closed.
The medium-pressure branch pipe 5 and the low-pressure branch pipe 6 are both connected with a superheater 10; a medium pressure branch pipe pressure transmitter 51 and a medium pressure branch pipe automatic valve 52 are arranged on the medium pressure branch pipe 5; a low-pressure branch pipe pressure transmitter 61, a low-pressure branch pipe automatic valve 62 and a pressure reducing valve 63 are arranged on the low-pressure branch pipe 6; the middle-pressure branch pipe pressure transmitter 51 and the low-pressure branch pipe pressure transmitter 61 send corresponding pressure signals of the middle-pressure branch pipe 5 and the low-pressure branch pipe 6 to the DCS central control system 4, and the DCS central control system 4 compares the received signals with set values and then controls the opening and closing sizes of the middle-pressure branch pipe automatic valve 52 and the low-pressure branch pipe automatic valve 62 to enable the pressure signals of the middle-pressure branch pipe 5 and the low-pressure branch pipe 6 to be smaller than the set values; wherein the pressure setting of the medium pressure branch pipe 5 is 3.96Mpa and the pressure setting of the low pressure branch pipe 6 is 0.65 Mpa.
A fan pressure transmitter 71 and a fan automatic regulating valve 72 are arranged at the outlet of the fan 7; the fan pressure transmitter 71 sends an outlet pressure signal of the fan 7 to the DCS central control system 4; the DCS 4 compares the received signal with a set value and then controls the opening and closing size of the fan automatic regulating valve 72 to enable the outlet pressure signal of the fan 7 to be within the range of the set value; wherein the outlet pressure of the fan 7 is set to 20-23 Kpa.
The working principle is as follows:
the desalted water comes into the deaerator 2, and the deaerator self-regulating valve 22 can be automatically opened and closed according to the water level; when the deaerator self-regulating valve 22 is opened, deaerated water enters the water feeding pump 8 and can enter the steam drum 3 through the coal economizer 9, and the steam drum regulating valve 32 on the steam drum water inlet pipe can be automatically opened and closed according to the steam drum liquid level, so that the steam drum liquid level is ensured to be within a process index range.
Saturated steam in the steam drum 3 is converted into superheated steam through the superheater 10 and then enters a medium-pressure steam pipeline; steam in the pipeline can enter the medium-pressure branch pipe 5 and the low-pressure branch pipe 6 to be respectively used by the medium-pressure using end 53 and the low-pressure using end 64; the medium-pressure branch pipe 5 and the low-pressure branch pipe 6 are respectively provided with a medium-pressure branch pipe pressure transmitter 51 and a low-pressure branch pipe pressure transmitter 61 which are used for transmitting pressure signals of the medium-pressure branch pipe 5 and the low-pressure branch pipe 6 to the DCS central control system 4 and further controlling the opening and closing of the medium-pressure branch pipe automatic valve 52 and the low-pressure branch pipe automatic valve 62; when the steam in the pipeline is distributed to the middle-pressure branch pipe 5, the steam is directly supplied to the middle-pressure using end 53, and when the steam in the pipeline is distributed to the low-pressure branch pipe 6, the steam passes through the pressure reducing valve 63 and is then sent to the low-pressure using end 64 for use.
After combustion gas in the boiler main body 1 passes through the cyclone separator 11, flue gas enters the flue 12, and separated dust particles fall to the bottom of the cyclone separator 11 and are blown into a boiler furnace by the fan 7 to complete material return; the fan pressure transmitter 71 and the fan automatic regulating valve 72 are arranged at the outlet of the fan 7, the fan pressure transmitter 71 sends a fan 7 outlet pressure signal to the DCS central control system 4, and the DCS central control system 4 further controls the opening and closing size of the fan automatic regulating valve 72, so that the fan 7 outlet pressure signal is in a set value range, and the material returning system is guaranteed to be normal.
Claims (6)
1. The automatic boiler comprises a boiler main body, wherein the boiler main body comprises a deaerator, a steam pocket, a water feeding pump, an economizer, a superheater, a cyclone separator and a flue; the automatic control device is characterized in that a deaerator liquid level meter is installed in the deaerator, and a deaerator self-regulating valve is arranged on a water outlet pipe at the bottom of the deaerator; a steam drum liquid level meter is arranged in the steam drum, and a steam drum regulating valve is arranged on the steam drum water inlet pipe; a medium-pressure branch pipe pressure transmitter is arranged on a medium-pressure branch pipe connected with the superheater, and an automatic medium-pressure branch pipe valve is arranged on the medium-pressure branch pipe; a low-pressure branch pipe pressure transmitter is arranged on a low-pressure branch pipe connected with the superheater, and a low-pressure branch pipe automatic valve is arranged on the low-pressure branch pipe; a fan pressure transmitter and a fan automatic regulating valve are arranged at the outlet of the fan; the deaerator liquid level meter, the deaerator self-regulating valve, the steam pocket liquid level meter, the steam pocket regulating valve, the medium-pressure branch pipe pressure transmitter, the medium-pressure branch pipe automatic valve, the low-pressure branch pipe pressure transmitter, the low-pressure branch pipe automatic valve, the fan pressure transmitter and the fan automatic regulating valve are all electrically connected with a DCS (distributed control system); the deaerator liquid level meter and the steam drum liquid level meter send corresponding liquid level signals of the deaerator and the steam drum to the DCS, the medium-pressure branch pipe pressure transmitter and the low-pressure branch pipe pressure transmitter send corresponding pressure signals of the medium-pressure branch pipe and the low-pressure branch pipe to the DCS, and the fan pressure transmitter sends a fan outlet pressure signal to the DCS; and the DCS central control system compares the received signal with a set value and then controls the opening and closing sizes of the deaerator self-regulating valve, the steam pocket regulating valve, the medium-pressure branch pipe automatic valve, the low-pressure branch pipe automatic valve and the fan automatic regulating valve, so that the deaerator, the liquid level signal of the steam pocket and the fan outlet pressure signal are in a set value range, and the pressure signals of the medium-pressure branch pipe and the low-pressure branch pipe are smaller than the set value.
2. The automated boiler of claim 1, wherein a level setpoint of the drum in the DCS central control system is between +50mm and-50 mm.
3. The automated boiler of claim 1, wherein the deaerator in the DCS has a level set point of 50% -80% of a normal level.
4. The automated boiler according to claim 1, wherein the pressure set point of the medium pressure branch pipe in the DCS central control system is 3.96 Mpa.
5. The automated boiler of claim 1, wherein the pressure set point of the low pressure branch pipes in the DCS central control system is 0.65 Mpa.
6. The automated boiler of claim 1, wherein the fan in the DCS central control system has an outlet pressure set point of 20-23 Kpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122807082.9U CN216281316U (en) | 2021-11-16 | 2021-11-16 | Automatic boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122807082.9U CN216281316U (en) | 2021-11-16 | 2021-11-16 | Automatic boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216281316U true CN216281316U (en) | 2022-04-12 |
Family
ID=81009461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122807082.9U Active CN216281316U (en) | 2021-11-16 | 2021-11-16 | Automatic boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216281316U (en) |
-
2021
- 2021-11-16 CN CN202122807082.9U patent/CN216281316U/en active Active
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