CN203297945U - Coal gas water seal roof caving pre-warning system - Google Patents
Coal gas water seal roof caving pre-warning system Download PDFInfo
- Publication number
- CN203297945U CN203297945U CN2013201013851U CN201320101385U CN203297945U CN 203297945 U CN203297945 U CN 203297945U CN 2013201013851 U CN2013201013851 U CN 2013201013851U CN 201320101385 U CN201320101385 U CN 201320101385U CN 203297945 U CN203297945 U CN 203297945U
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- coal gas
- water seal
- pressure
- gas
- pressure transmitter
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Abstract
The utility model discloses a coal gas water seal roof caving pre-warning system which comprises a pressure transmitter for measuring a water level and a pressure transmitter for measuring coal gas pressure, the pressure transmitter for measuring the water level is connected with the lower portion of the side face of a water tank, the pressure transmitter for measuring the coal gas pressure is connected with a coal gas pipeline, and measurement signals of the pressure transmitter for measuring the water level and the pressure transmitter for measuring the coal gas pressure are both sent to a same PLC. Therefore, on-line dynamic monitoring is carried out on the operation state of a coal gas water seal, particularly coal gas water seal roof caving can be warned early, and a warning signal can be sent before the occurrence of a water seal roof caving accident. By the adoption of the coal gas water seal roof caving pre-warning system, the defects that the operation state of an existing coal gas water seal is not dynamically monitored in an on-line mode, and no pre-warning function is provided for the coal gas water seal roof caving are overcome, and the coal gas water seal roof caving pre-warning system plays a positive role in reducing the safety accident rate and improving productivity in a metallurgy enterprise.
Description
Technical field
The utility model relates to metallurgy industry instrument observation and control technology field, relates in particular to a kind of water seal for coal gas roof fall early warning system.
Background technique
The metallurgy industry water seal for coal gas mainly divides two classes: a class is the overfalling type water seal for coal gas, the effect of such water seal is to collect condensed water and impurity in gas pipe line, gas condensed water is collected by the water tank of water seal for coal gas, the water of water tank discharge by relief valve after completely, prevent simultaneously the interior coal gas of gas pipe line with condensed water to external leakage; Another kind of for overhauling the shape coal-gas water seal, the effect of such water seal is when the coal gas user stops using coal gas or gas fittings need to stop the supple of gas or steam maintenance, cuts off gaspipe network and is connected with the coal gas of coal gas user or equipment.
Water seal for coal gas occurs that the coal gas roof fall accident is the reason of gas leakage accident, has following two aspects usually: being that cistern water level is too low on the one hand, is that gas pressure is too high on the other hand.At present only in large-scale maintenance type water seal, establish glass tube water level gauge, the water level by the field observation water seal for coal gas judges whether to occur gas leakage, because water tank lacks water or the too high water seal for coal gas roof fall accident that causes of gas pressure happen occasionally.Therefore, there is following shortcoming in traditional water seal for coal gas, and the first, workman's labor intensity is very large, and manufacturing efficiency is very low; The second, roof fall accident that can not the early warning water seal for coal gas.In case water seal for coal gas lack of water and not in time not checking out, perhaps the coal gas roof fall does not have early warning and takes measures on customs clearance, and will cause staff's gas poisoning in gas leakage zone, even can cause the explosion of fire damp accident.
Summary of the invention
In view of this, main purpose of the present utility model is to provide a kind of water seal for coal gas roof fall early warning system and method, can carry out online dynamic surveillance to the water seal for coal gas running state in control room, particularly for the abnormal operating mode that raises of gas pressure, can give warning in advance, avoid the generation of water seal for coal gas roof fall accident.
For achieving the above object, the technical solution of the utility model is achieved in that
A kind of water seal for coal gas roof fall early warning system, comprise that pressure transmitter 1, water tank 2, the pressure transmitter 3 of measuring gas pressure, the gas pipe line 4 of measuring water level, the pressure transmitter 1 of measuring water level are connected with the bottom of water tank 2 sides, the pressure transmitter 3 of described measurement gas pressure is connected with gas pipe line 4.
Wherein: the measurement signal of the pressure transmitter 3 of the pressure transmitter 1 of described measurement water level and measurement gas pressure send same set of PLC.
The water level h of described PLC On-Line Dynamic Monitoring water seal for coal gas and gas pipe line pressure P 2, and the static pressure P1 of calculating cistern water level generation and the differential pressure value of P2, judge that this differential pressure value is whether less than the water seal for coal gas breakdown value △ P of gas pipe line pressure P 2 correspondences this moment, during less than described breakdown value, send water seal for coal gas roof fall early warning signal when described differential pressure value.
Water seal for coal gas roof fall early warning system provided by the utility model has the following advantages:
1) utilize the utility model to carry out online dynamic monitoring to the water seal for coal gas operation conditions, have and install simple and conveniently, handling safety is reliable, detects and promptly and accurately waits advantage.
2) utilize the utility model may produce the water seal for coal gas roof fall accident to the abnormal rising of gas pressure and carry out early warning, smelter is reduced the security incident incidence rate and boosts productivity and can play positive role.
3) reduce investment outlay, need not to increase too many equipment, only needing on traditional water seal for coal gas increases a pressure transmitter, just can realize a kind of water seal for coal gas roof fall early warning system and method, the generation that can reduce labor strength and stop security incident.
Description of drawings
Fig. 1 is the utility model maintenance shape coal-gas water seal one embodiment's schematic diagram;
Fig. 2 is the utility model overfalling type gas liquor front cover embodiment schematic diagram.
[critical piece symbol description]
1: the pressure transmitter of measuring water level
2: water tank
3: the pressure transmitter of measuring gas pressure
4: gas pipe line
5: electric butterfly valve (stop valve)
6: water-feeding valve
7: relief valve
8: blowdown valve.
Embodiment
Below in conjunction with accompanying drawing and embodiment of the present utility model, system of the present utility model is described in further detail.
Fig. 1 is the utility model maintenance shape coal-gas water seal one embodiment's schematic diagram, as shown in Figure 1, wherein: the pressure transmitter 1 of measuring water level is connected with the bottom of water tank 2 sides, the pressure transmitter 3 of measuring gas pressure is connected with gas pipe line 4, and the measurement signal of the pressure transmitter 3 of the pressure transmitter 1 of measurement water level, measurement gas pressure send same set of PLC.
When coal gas user or equipment need to be stopped the supple of gas or steam maintenance, water tank 2 is filled water, electric butterfly valve 5, water-feeding valve 6, relief valve 7, blowdown valve 8 are closed, because electric butterfly valve 5 can not be accomplished to seal fully, must seal fully by the water in water tank 2, the water level of water tank 2 is measured by pressure transmitter 1.
P1=δ h γ or h=P1/ (δ γ)
Wherein: P1 is the static pressure that cistern water level produces, unit: kPa; H is cistern water level, unit: m; γ is the density of water, unit: kg/m
3δ is the unit conversion coefficient, 1kgf/m
2=0.01 kPa=1mmH
2O。
Can stop the coal gas of gaspipe network to be revealed to the water seal downstream line in order to ensure water seal for coal gas, the water level generation static pressure P1 of water tank 2 and the differential pressure value that gas pipe line pressure P 2 is set up must be more than or equal to water seal for coal gas breakdown value △ P.
P1-P2≥△P
Wherein: P1 is the static pressure that cistern water level produces, unit: kPa.P2 is gas pipe line pressure, unit: kPa.△ P is the water seal for coal gas breakdown value, unit: kPa.
The water seal for coal gas breakdown value is relevant with gas pipe line pressure P 2, and specific implementation process is as follows:
As gas pipe line pressure P 2≤3kPa (300 mmH
2O) time, △ P gets 1.5 kPa(150mmH
2But P1 ≮ 2.5 kPa (250mmH O),
2O);
As gas pipe line pressure 3kPa (300 mmH
2O)＜P2＜10kPa (1000 mmH
2O) time, △ P gets 0.5 * P2;
As gas pipe line pressure P 2 〉=10kPa (1000 mmH
2O) time, △ P gets 5kPa(500mmH
2O).
Cause the factor of water seal for coal gas roof fall usually to have two: the one, the water in water tank is evaporated or the reason such as radiator leak descends cistern water level h=P1/ (δ γ), and the 2nd, in gaspipe network, gas pressure P2 is too high.Therefore, water level h=P1/ (δ γ) and gas pipe line pressure P 2 by control room PLC On-Line Dynamic Monitoring water seal for coal gas change, and calculate P1(P1=δ h γ) and the differential pressure value of P2, judge that this differential pressure value is whether less than the water seal for coal gas breakdown value P1-P2 of gas pipe line pressure P 2 correspondences this moment＜△ P, when this differential pressure value during more than or equal to breakdown value, coal gas can not be leaked to downstream line by water seal for coal gas, illustrates that the water seal for coal gas working state is normal.And when this differential pressure value during less than breakdown value, illustrate that the water seal for coal gas working state is abnormal, the water seal for coal gas roof fall accident likely occurs, PLC sends water seal for coal gas roof fall early warning signal, notice relevant departments or related personnel take corresponding measure, avoid the generation of gas leakage accident.
Fig. 2 is the utility model overfalling type gas liquor front cover embodiment schematic diagram, comprise that the pressure transmitter 1 of measuring water level is connected with the bottom of water tank 2 sides, the pressure transmitter 3 of measuring gas pressure is connected with gas pipe line 4, and the measurement signal of the pressure transmitter 3 of the pressure transmitter 1 of measurement water level, measurement gas pressure send same set of PLC.
When water seal for coal gas is worked, stop valve 5, relief valve 7 are open mode, water-feeding valve 6, blowdown valve 8 are closed condition, gas condensed water is collected by water tank 2 and is passed through relief valve 7 and discharge, the water level of water seal for coal gas is full, water seal for coal gas only allows condensed water to pass through, do not allow coal gas by water seal for coal gas to outward leakage.
Water level h=P1/ (δ γ) and gas pipe line pressure P 2 by control room PLC On-Line Dynamic Monitoring water seal for coal gas also calculated P1(P1=δ h γ) and the differential pressure value of P2, judge that this differential pressure value is whether less than the water seal for coal gas breakdown value P1-P2 of gas pipe line pressure P 2 correspondences this moment＜△ P, when this differential pressure value during more than or equal to breakdown value, coal gas can not, by water seal for coal gas to outward leakage, illustrate that the water seal for coal gas working state is normal; When this differential pressure value during less than breakdown value, illustrate that the water seal for coal gas working state is abnormal, the water seal for coal gas roof fall accident likely occurs, PLC sends water seal for coal gas roof fall early warning signal, notice relevant departments or related personnel take corresponding measure, avoid the generation of gas leakage accident.
The above, be only preferred embodiment of the present utility model, not is used for limiting protection domain of the present utility model.
Claims (2)
1. water seal for coal gas roof fall early warning system, it is characterized in that, comprise that pressure transmitter (1), water tank (2), the pressure transmitter (3) of measuring gas pressure, the gas pipe line (4) of measuring water level, the pressure transmitter (1) of measuring water level are connected with the bottom of water tank (2) side, the pressure transmitter of described measurement gas pressure (3) is connected with gas pipe line (4).
2. water seal for coal gas roof fall early warning system according to claim 1, is characterized in that, the measurement signal of the pressure transmitter of described measurement water level (1) and the measurement large pressure transmitter of gas pressure (3) send same set of PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201013851U CN203297945U (en) | 2013-03-06 | 2013-03-06 | Coal gas water seal roof caving pre-warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201013851U CN203297945U (en) | 2013-03-06 | 2013-03-06 | Coal gas water seal roof caving pre-warning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203297945U true CN203297945U (en) | 2013-11-20 |
Family
ID=49573951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201013851U Withdrawn - After Issue CN203297945U (en) | 2013-03-06 | 2013-03-06 | Coal gas water seal roof caving pre-warning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203297945U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148352A (en) * | 2013-03-06 | 2013-06-12 | 中冶南方工程技术有限公司 | Coal gas water seal roof collapse early warning system and method thereof |
-
2013
- 2013-03-06 CN CN2013201013851U patent/CN203297945U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148352A (en) * | 2013-03-06 | 2013-06-12 | 中冶南方工程技术有限公司 | Coal gas water seal roof collapse early warning system and method thereof |
| CN103148352B (en) * | 2013-03-06 | 2016-06-29 | 中冶南方工程技术有限公司 | A kind of water seal for coal gas roof fall early warning system and method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131120 Effective date of abandoning: 20160629 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20131120 Effective date of abandoning: 20160629 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |