Coke oven and converter gas Bar flowmeter sensor blowback system

Abstract

The utility model relates to a coke oven and converter gas Bar flowmeter sensor blowback system, which comprises a Bar flowmeter, a nitrogen purging pipeline, a flowmeter pressure guide pipe b, a control valve group a, a control valve group b and a nitrogen source, the Bar flowmeter comprises a flowmeter sensor, a flowmeter pressure guide pipe a and a pressure guide pipe differential pressure transmitter, and the nitrogen purging pipeline is communicated with the flowmeter pressure guide pipe b. The flow meter sensor is connected to the flow meter pressure guide pipe b through the flow meter pressure guide pipe a, the flow meter pressure guide pipe b is connected to the pressure guide pipe differential pressure transmitter through the control valve set b, a gas output pipeline of the nitrogen gas source is connected with the nitrogen purging pipeline, and the nitrogen purging pipeline is connected to the flow meter pressure guide pipe b through the control valve set a. According to the utility model, nitrogen is controlled to purge the cavity of the Bar flowmeter, so that the cavity of the Bar flowmeter is transparent, and data misalignment caused by blockage of the cavity is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to flowmeter technical field especially relates to a coke oven, converter gas bar type flowmeter sensor back flushing system. BACKGROUND

[0002] Bar type flowmeter is suitable for high-precision flow measurement of gas, liquid and steam, is a differential pressure type, rate average type flow sensor, and is used for flow measurement through the differential pressure generated by the sensor in the fluid, and the accurate measurement of coke and converter gas in steel and metallurgical enterprises has always been an industry problem, especially coke oven gas measurement is more prominent, the field measurement equipment is greatly influenced by working condition factors during operation, for example: unreasonable original design parameter, too small differential pressure value, effective straight pipe section change, density is not fixed, sensor pressure taking cavity is frozen and the like, aiming at the sensor pressure taking cavity, pressure guide pipe is frozen due to medium dirt and low temperature, which will lead to inaccurate sensor measurement, thereby leading to deviation of coke and converter gas process parameters of steel and metallurgical enterprises. SUMMARY

[0003] The utility model provides a coke oven, converter gas bar type flowmeter sensor back flushing system, through control nitrogen to the cavity of bar type flowmeter carries out purging, guarantees bar type flowmeter cavity permeability, prevents data misalignment caused by cavity blockage.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A coke oven, converter gas bar type flowmeter sensor back flushing system, including bar type flowmeter, the bar type flowmeter includes flowmeter sensor, flowmeter pressure guide pipe a and pressure guide pipe differential pressure transmitter, still includes nitrogen purging pipeline, flowmeter pressure guide pipe b, control valve group a, control valve group b and nitrogen gas source, the flowmeter sensor is connected to flowmeter pressure guide pipe b through flowmeter pressure guide pipe a, and flowmeter pressure guide pipe b is connected to pressure guide pipe differential pressure transmitter through control valve group b, the gas output pipeline of nitrogen gas source is connected nitrogen purging pipeline, and nitrogen purging pipeline is connected to flowmeter pressure guide pipe b through control valve group a.

[0006] Further, the control valve group a and control valve group b are electric control valve groups.

[0007] Further, it further includes the controller, and the output port of the controller is connected with the control signal line of control valve group a and control valve group b respectively.

[0008] Compared with the prior art, the utility model has the advantages of:

[0009] 1) by increasing nitrogen gas source in the nitrogen gas source into the nitrogen purge pipeline, the realization of the bar type flowmeter cavity flowmeter sensor, flowmeter pressure guide pipe a is purged, ensure the bar type flowmeter cavity permeability, prevent the cavity blockage caused by data misalignment;

[0010] 2) by controlling valve group a to adjust the nitrogen blowing flow, by controlling valve group b and controlling valve group a is used to switch control bar type flowmeter working state or purging state;

[0011] 3) by controlling valve group a, controlling valve group b connecting controller automatic switching normal operation and nitrogen purging state, realize regular purging;

[0012] 4) realize the bar type flowmeter on-line purging cleaning, ensure the flowmeter accurate measurement, for production command, cost accounting provides accurate measurement data. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the structure diagram of the utility model.

[0014] Figure: 1. flowmeter sensor 2. flowmeter pressure guide pipe a 3. pressure guide pipe differential pressure transmitter 4. nitrogen purge pipeline 5. flowmeter pressure guide pipe b 6. control valve group a 7. control valve group b 8. nitrogen gas source DETAILED DESCRIPTION

[0015] The specific embodiments of the utility model are further explained below in conjunction with the drawings:

[0016] See Figure 1 , the structure diagram of the utility model. The utility model discloses a coke oven, converter gas bar type flowmeter sensor backflushing system, including bar type flowmeter, nitrogen purge pipeline 4, flowmeter pressure guide pipe b 5, control valve group a 6, control valve group b 7 and nitrogen gas source 8 and controller, the bar type flowmeter includes flowmeter sensor 1, flowmeter pressure guide pipe a 2 and pressure guide pipe differential pressure transmitter 3;

[0017] Flowmeter sensor 1 is connected to flowmeter pressure guide pipe b 5 through flowmeter pressure guide pipe a 2, and flowmeter pressure guide pipe b 5 is connected to pressure guide pipe differential pressure transmitter 3 through control valve group b 7, the gas output pipeline of nitrogen gas source 8 is connected to nitrogen purge pipeline 4, nitrogen purge pipeline 4 is connected to flowmeter pressure guide pipe b 5 through control valve group a 6, and flowmeter sensor 1 acts in the measured pipeline.

[0018] The nitrogen blowing pipeline 4 is provided with two pipelines of positive pressure and negative pressure, one control valve in the control valve group a6 is arranged on the two nitrogen blowing pipelines 4, respectively, the flowmeter pressure guide pipe b5 is provided with two pipelines of positive pressure and negative pressure, one control valve in the control valve group b7 is arranged on the two flowmeter pressure guide pipes b5, respectively, the control valve group a6 and the control valve group b7 are electric control valve groups, and output ports of the controller are connected with control signal lines of the control valve group a6 and the control valve group b7, respectively.

[0019] Working principle: for the situation that the dirty medium of the bar type flowmeter affects the measurement, 0.6MPa nitrogen gas of the nitrogen gas source 8 is introduced into the flowmeter pressure guide pipe a2 through the nitrogen blowing pipeline 4, the control valve group a6 on the nitrogen blowing pipeline 4 controls the on-off and flow of the nitrogen gas introduced into the flowmeter pressure guide pipe a2, the on-off of the control valve group a6 and the control valve group b7 is controlled by the controller to output the on-off signal in the automatic control, the on-off of the control valve group a6 and the control valve group b7 is controlled by the operator in the manual control, the control valve group a6 is closed, the control valve group b7 is opened to be in the normal running state of the bar type flowmeter, the control valve group a6 is opened, and the control valve group b7 is closed to be in the blowing state of the bar type flowmeter.

[0020] The above examples are implemented on the premise of the technical scheme of the utility model, detailed implementation modes and specific operation processes are given, but the protection scope of the utility model is not limited to the above examples. The methods used in the above examples are all conventional methods without special instructions.

Claims

1. A backflushing system for a bar-type flowmeter sensor of coke oven and converter gas, comprising a bar-type flowmeter, wherein the bar-type flowmeter includes a flowmeter sensor, a flowmeter pressure guide tube a, and a pressure guide tube differential pressure transmitter, characterized in that, It also includes a nitrogen purging pipeline, a flow meter pressure guide pipe b, a control valve group a, a control valve group b, and a nitrogen gas source. The flow meter sensor is connected to the flow meter pressure guide pipe b through the flow meter pressure guide pipe a. The flow meter pressure guide pipe b is connected to the pressure guide pipe differential pressure transmitter through the control valve group b. The gas output pipeline of the nitrogen gas source is connected to the nitrogen purging pipeline. The nitrogen purging pipeline is connected to the flow meter pressure guide pipe b through the control valve group a.

2. The backflushing system for a coke oven and converter gas flow meter sensor according to claim 1, characterized in that, Both control valve group a and control valve group b are electrically controlled valve groups.

3. The backflushing system for a coke oven and converter gas flow meter sensor according to claim 2, characterized in that, It also includes a controller, whose output ports are respectively connected to the control signal lines of control valve group a and control valve group b.

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