CN216744399U

CN216744399U - Slag pool overflow-free control system of scraper slag conveyor

Info

Publication number: CN216744399U
Application number: CN202220285968.3U
Authority: CN
Inventors: 张晓�; 陈华冬; 邢元斌; 朱瑜; 伍鼎好; 朱光耀; 陈人波; 王名政
Original assignee: Haikou Power Plant of Huaneng Hainan Power Generation Co Ltd
Current assignee: Haikou Power Plant of Huaneng Hainan Power Generation Co Ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-06-14
Anticipated expiration: 2032-02-14

Abstract

The utility model relates to the technical field of overflow-free slag pool of a scraper slag conveyor, and particularly discloses a set of overflow-free control system for the slag pool of the scraper slag conveyor, which comprises a plurality of radar liquid level meters arranged in the slag conveyor, an adjusting type electric actuating mechanism electrically connected with the radar liquid level meters and used for controlling water inflow, a purging system used for purging the radar liquid level meters and a plurality of thermal resistance temperature elements used for detecting water temperature.

Description

Slag pool overflow-free control system of scraper slag conveyor

Technical Field

The application relates to the technical field of overflow-free slag pools of scraper slag conveyors, and particularly discloses an overflow-free control system for a slag pool of a scraper slag conveyor.

Background

Furnace bottom ash is deposited in the slag dredger and is carried to a slag bin by a scraper for storage. The water level of the slag ship of the conventional scraper slag conveyor is always in an overflow state, and a small amount of fine slag is contained in the overflow water. After the slag conveyor runs for a long time, the drainage ditch, the water collecting tank and the slag removing circulating water pump are easy to block, and the slag removing circulating water pump cannot work in serious cases. When the accumulated slag in the water collecting tank is excessive, the slag water circulating system is required to be stopped to clean the water collecting tank and the drainage ditch, and the workload of maintenance is large. Therefore, a scraper slag conveyor overflow-free control system which can perform fine water level adjustment according to the water level of a slag ship of a slag conveyor, realize automatic water level adjustment, realize a quick water replenishing function when the water level is too low and also perform manual water replenishing is needed to be designed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a set of control system which can ensure that a slag boat has no overflow, reduce the running of a water pump, save a large amount of water, reduce the service power consumption and the maintenance workload, and can ensure that the water level and the water temperature of the slag boat are within a reasonable range.

In order to achieve the above object, the present invention provides the following basic solutions:

a slag pool overflow-free control system of a scraper slag conveyor comprises a plurality of radar liquid level meters arranged in the slag conveyor, an adjusting type electric actuating mechanism which is electrically connected with the radar liquid level meters and used for controlling water inflow, a purging system used for purging the radar liquid level meters and a plurality of thermal resistance temperature elements used for detecting water temperature. The device also comprises a joint control system for controlling the radar liquid level meter, the adjusting type electric actuating mechanism, the thermal resistance temperature element and alarming.

The principle and effect of this basic scheme lie in:

1. compared with the prior art, the utility model provides the slag ship water level control device which can ensure that the water level of the slag ship operates in a reasonable range, does not damage the water seal at the bottom of the furnace, can ensure that the water level of the slag ship does not overflow, reduces the operation of a water pump, saves a large amount of water, reduces the consumption of service power and reduces the maintenance workload. The novel air conditioner is simple in design and convenient to install, and plays a good practical effect on improving the safe operation of the unit.

2. Compared with the prior art, in order to automatically maintain the water level of the slag dredger at the normal water level without overflowing, a plurality of radar liquid level meters and purging systems of the slag dredger are additionally arranged, a plurality of water temperature thermal resistors of the slag dredger are installed with an adjusting type electric actuating mechanism, and water is automatically controlled and replenished according to the actual liquid level of the slag dredger. A plurality of temperature measuring points are additionally arranged, and when the water temperature exceeds a preset value, an alarm is given.

Further, when a certain radar liquid level meter has a measurement fault, the radar liquid level meter is automatically rejected, an alarm is given and converted into a measurement signal of the rest radar liquid level meters to be averaged, and when only one radar liquid level meter which can normally work is left, the radar liquid level meter is used as a normal measurement value and the measurement value is taken.

Furthermore, the purging system comprises a gas pipe, a needle valve, a pressure reducing valve and a floating ball dosimeter, wherein the needle valve, the pressure reducing valve and the floating ball dosimeter are arranged on the gas pipe, the output end of the gas pipe is located on a probe of the radar liquid level meter, and the purging mode is continuous purging. The radar liquid level meter probe adopts clean compressed air to continuously sweep, prevents that steam or dust adhesion from influencing the normal measurement of level gauge on the level gauge probe, and the pressure, the flow of this sweep air can be adjusted according to on-the-spot actual conditions, sparingly use the tolerance under the prerequisite of guaranteeing to sweep the effect.

Furthermore, a high-definition digital camera system is arranged at the position of the scraper at the inclined ascending section of the slag conveyor, and the high-definition digital camera system comprises a deflectable camera and an illumination structure which can be electrically connected with the deflectable camera. A set of high-definition digital camera system is arranged above the slag ship, the water level operation condition of the slag ship is transmitted to a centralized control room in real time, and operation personnel can conveniently and remotely monitor the operation conditions of the water level, the chain and the like of the slag dragging machine.

Further, the deflectable camera adopts a high-definition digital camera. The image fed back by the high-definition digital camera is clearer.

Further, the joint control system is a DCS system.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 shows a system layout design diagram of a slag pool overflow-free control system of a scraper slag conveyor according to an embodiment of the application;

FIG. 2 shows a layout design diagram of a radar liquid level meter and a purging system in a slag pool overflow-free control system of a scraper slag conveyor proposed by the embodiment of the application;

fig. 3 shows a control flow chart of a slag pool overflow-free control system of a scraper slag conveyor proposed by the embodiment of the application.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined purpose of the present invention, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Reference numerals in the drawings of the specification include: the device comprises a radar liquid level meter 1, a thermal resistance temperature element 2, a high-definition digital camera system 3, an adjusting type electric actuating mechanism 4, a slag salvaging machine 5, a needle valve 6, a pressure reducing valve 7, a floating ball dosimeter 8 and a gas transmission pipe 9.

Examples are shown in fig. 1, 2 and 3:

one set of scraper blade dragveyer slag bath does not have overflow control system, including setting up a plurality of radar level gauge 1 in dragveyer 5 top, be connected and be used for controlling into regulation type electric actuator 4 of water with 1 electricity of radar level gauge, be used for the sweep system that radar level gauge 1 sweeps and a plurality of thermal resistance temperature element 2 that are used for the temperature to detect, still including the joint control system who is used for controlling radar level gauge 1, festival type electric actuator, thermal resistance temperature element 2 and reports to the police.

In order to automatically maintain the water level of a slag ladle 5 at a normal water level without overflowing, the number of the radar liquid level meters 1 is three, as shown in fig. 1, the radar liquid level meters 1 are arranged above the slag ladle 5, then the thermal resistance temperature elements 2 are installed, the number of the thermal resistance temperature elements 2 is three, the preset temperature of the thermal resistance temperature elements 2 is 75 degrees, then the adjusting type electric actuating mechanism 4 is installed, the adjusting type electric actuating mechanism 4 is an automatic water outlet switch used for controlling the water inflow in the market, after the hardware is installed, a control system is needed, and the combined control system is a DCS system;

the control logic of the DCS system ensures that the water temperature of the slag ship is in a reasonable range, three thermal resistance elements are arranged above the slag ship, thermal resistance measurement signals are subjected to three-time-taking processing in the DCS system, and meanwhile, the quality judgment, alarm and switching logic of the measurement signals is carried out, so that the reliability of temperature measurement is improved. When a certain thermal resistance measurement fault occurs, the thermal resistance measurement fault is automatically eliminated, an alarm is given and converted into the measurement signals of the remaining two thermal resistances to be averaged; when two thermal resistors are in fault, the two thermal resistors are automatically rejected, alarm is given and normal thermal resistor measurement value is taken. Setting a reasonable alarm value for the measured temperature, and reminding an operator to pay attention to checking whether manual intervention is needed or not when the water temperature is too high;

three radar liquid level meters 1 are arranged above the slag ship, three-sampling middle processing is carried out on a liquid level meter measuring signal in a DCS (distributed control system), quality judgment, alarming and switching logic of the measuring signal are carried out simultaneously, the reliability of liquid level measurement is improved, when one radar liquid level meter 1 fails in measurement, the radar liquid level meter 1 is automatically removed, alarmed and converted into measuring signals of the remaining two radar liquid level meters 1, and the measuring signals are averaged; when the two radar liquid level meters 1 have measurement faults, the two radar liquid level meters are automatically removed, alarm is given, and the normal measurement value of the radar liquid level meter 1 is obtained.

With respect to the purge system: as shown in fig. 2, the purging system includes gas transmission pipe 9, needle valve 6, relief pressure valve 7 and floater dosimeter 8 of setting on

gas transmission pipe

9, and 7 control pressure on the relief pressure valve, floater flowmeter 8 show the flow, and the air in the gas transmission pipe 9 is clean air, and the mode of purging is for purging in succession, and the output of gas transmission pipe 9 is located the probe of radar level gauge 1, and is concrete: and the lower end of the probe of each radar liquid level meter 1 is continuously purged at a certain distance, so that water vapor or dust is prevented from adhering to the probe to influence the normal measurement of the liquid level meter. The pressure and the flow of the air purging can be adjusted according to the actual situation on site, and the air consumption is saved on the premise of ensuring the purging effect.

As shown in fig. 1, the department is equipped with high definition digital camera system 3 in the oblique rising section scraper blade position of dragveyer 5, high definition digital camera system 3 includes the camera that can deflect and can with the illumination structure that the camera electricity is connected that deflects, one set of high definition digital camera system 3 is equipped with to the sediment ship top, convey the sediment ship water level behavior to centralized control room in real time, make things convenient for the operation personnel remote monitoring dragveyer 5 water level, the operation conditions of chain etc., the camera that can deflect adopts high definition digital camera, the image of high definition digital camera feedback is more clear.

The specific implementation process comprises the following steps: first step, level control logic for the DCS system and the radar level gauge 1: as shown in fig. 3, when the actual operation water level is higher than the set water level, adjusting the opening of the actuating mechanism to 0%, locking and stopping the deslagging circulating water pump in parallel, and when the actual operation water level is 100mm lower than the set water level, alarming and quickly adjusting the opening of the actuating mechanism to 25%; alarming when the water level is lower than 200mm and quickly adjusting the opening of an actuating mechanism to 50 percent; when the water level is 250mm lower than the set value, alarming is carried out, the opening of the actuating mechanism is quickly adjusted to 100%, and meanwhile, operators are reminded to pay attention to the fact that manual intervention is needed;

the water replenishing door in fig. 3 is a part of the adjusting type electric actuator 4, and the adjusting type electric actuator 4 is mature in the field of liquid level control, and the adjusting type electric actuator 4 is not described too much here.

And secondly, when the water level is lower than the set value of 250mm, alarming and quickly adjusting the opening of the actuating mechanism to 100 percent, so that automatic jump and manual operation can be realized, and manual intervention is realized.

And thirdly, alarming about the water temperature, and when the water temperature is higher than or equal to 75 ℃, alarming to work to remind an operator whether to intervene manually, wherein if manual intervention is needed, automatic adjustment is required to be converted into manual adjustment.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. One set of scraper blade dragveyer slag bath does not have overflow control system, its characterized in that: the device comprises a plurality of radar liquid level meters arranged in a slag salvaging machine, an adjusting type electric actuating mechanism which is electrically connected with the radar liquid level meters and used for controlling water inflow, a purging system used for purging the radar liquid level meters, a plurality of thermal resistance temperature elements used for detecting water temperature, and a joint control system used for controlling the radar liquid level meters, the adjusting type electric actuating mechanism, the thermal resistance temperature elements and alarming.

2. The system of claim 1, wherein when a radar level gauge fails, the radar level gauge is automatically rejected, alarmed and converted into a mean value of measurement signals of the remaining radar level gauges, and when only one radar level gauge measurement is left to work normally, the radar level gauge is taken as normal and the measurement value is taken.

3. The system for controlling the overflow of the slag pool of the scraper slag conveyor as claimed in claim 1, wherein the blowing system comprises a gas pipe, a needle valve, a pressure reducing valve and a floating ball dosimeter, the needle valve, the pressure reducing valve and the floating ball dosimeter are arranged on the gas pipe, and an output end of the gas pipe is positioned on a probe of a radar liquid level meter.

4. The system of claim 3, wherein the air in the air delivery conduit is clean air and the purging mode is continuous purging.

5. The system of claim 1, wherein a high-definition digital camera system is provided at the position of the scraper of the ramp-up section of the slag conveyor, and the high-definition digital camera system comprises a deflectable camera and an illumination structure electrically connected with the deflectable camera.

6. The set of scraper slag conveyor slag basin overflow-free control systems of claim 5, wherein the deflectable camera is a high-definition digital camera.

7. The set of scraper slag conveyor slag bath overflow-free control systems of claim 1, wherein the joint control system is a DCS system.