CN212982891U - Coal water slurry steady flow protection device - Google Patents
Coal water slurry steady flow protection device Download PDFInfo
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- CN212982891U CN212982891U CN202020764055.0U CN202020764055U CN212982891U CN 212982891 U CN212982891 U CN 212982891U CN 202020764055 U CN202020764055 U CN 202020764055U CN 212982891 U CN212982891 U CN 212982891U
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Abstract
The utility model discloses a coal slurry stationary flow protection device, including the coal slurry pump, the intercommunication has the gasifier on the coal slurry pump, has set the valve of wasting discharge between coal slurry pump and the gasifier, still has set the stove valve of going into between valve of wasting discharge and the gasifier, has solved the feeding in-process that exists among the prior art and has caused the oxygen coal to trigger than interlock signal because the resistance exists to lead to throwing the material failure problem.
Description
Technical Field
The utility model belongs to the technical field of the coal slurry transportation, a coal slurry stationary flow protection device is related to.
Background
The coal water slurry gasification process is a process for preparing synthesis gas from coal, which is relatively advanced in the field of coal chemical industry and is the most mature in China at present, the most important and most dangerous step in the coal slurry gasification process is feeding of a gasification furnace, and the specific process is as follows: feeding the coal water slurry and oxygen which flow stably into the gasification furnace according to the set proportion, speed, time and sequence, and then igniting normally, namely feeding successfully; if the coal slurry and the oxygen rate have deviation, the abnormal interlocking of the oxygen-coal ratio can be triggered to cause the failure of feeding, and under the condition of not hanging the interlocking, serious safety accidents can be caused by the flash explosion of the gasification furnace caused by the peroxide, so that property and casualty loss can be caused.
To ensure the successful feeding of the gasification furnace, the charging time difference between the coal slurry and the oxygen is controlled within the accurate range of 10-15 seconds, and the method is based on two principles: firstly, the coal slurry is fed into the gasifier earlier than oxygen, so that the situation that oxygen enters the gasifier before the coal slurry is fed into the gasifier, which causes the gasifier to be peroxy and causes failure interlock of feeding or flash explosion in the gasifier; and secondly, the time for oxygen to enter the gasification furnace cannot be too late so as to ensure that the coal slurry can be ignited at the moment of entering the gasification furnace, and prevent the coal slurry from entering the gasification furnace too much and being incapable of being ignited so as to influence the normal operation of the gasification furnace after feeding.
In actual production, the oxygen pipeline has stable flow and the flow rate can be completely controlled within a normal range due to the small resistance of the gas and the existence of a plurality of exhaust devices. However, for the coal slurry pipeline, the resistance of the coal slurry pipeline and impurities remained in the dead zone of the pipeline can affect the stable flow of the coal slurry, thereby destroying the accuracy of the coal slurry entering the furnace. Before the feeding is started, the high-pressure coal slurry enters the pipeline and then starts to circulate, and residual water, air and impurities remained in the dead zone of the pipeline are instantly compressed in the resistance dead zone by the circulating high-pressure coal slurry. After the feeding is started, the water, gas and impurities in the high-pressure area influence the normal action of the valve and hinder the stable flow of the coal slurry, so that the flow rate ratio of oxygen and the coal slurry exceeds the control range of an automatic control system, a parking interlocking device is triggered to cause the failure of feeding, and finally, huge burden is caused to enterprises in terms of time and economy. Under the condition that the interlocking device fails or interlocking is not hung, the gasification furnace flash explosion accident caused by the failure of feeding has great influence on the service life of the gasification furnace, and the loss of personnel, property and environment is immeasurable.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a coal slurry stationary flow protection device has solved the feeding in-process that exists among the prior art and has caused the oxygen coal to trigger than interlock signal because the resistance exists to lead to throwing the material failure problem.
The utility model provides a technical scheme is, a coal slurry stationary flow protection device, a serial communication port, including the coal stuff pump, the intercommunication has the gasifier on the coal stuff pump, has set the valve of wasting discharge between coal stuff pump and the gasifier, has still set the income stove valve between valve of wasting discharge and the gasifier.
The utility model discloses a characteristics still lie in:
the waste discharge valve has at least two, and two adjacent waste discharge valves are connected in series.
An on-site flow monitoring instrument is arranged between the waste valve and the furnace inlet valve.
Still set the return line between coal slurry pump and the gasifier, set the coal slurry return valve on the return line, the return line is located between exhaust valve and the coal slurry pump.
And a temperature display instrument is arranged between the return pipeline and the coal slurry pump.
And a pressure display instrument is arranged between the return pipeline and the coal slurry pump.
And a remote flow monitoring instrument is also arranged between the return pipeline and the coal slurry pump, a coal slurry pump rotating speed regulator is arranged on the coal slurry pump, and the coal slurry pump rotating speed regulator is in signal connection with the remote flow monitoring instrument.
The utility model has the advantages that the utility model relates to a coal water slurry steady flow protection device, which solves the problem that the oxygen-coal ratio interlocking signal is triggered due to the resistance in the feeding process existing in the prior art, thereby leading to the failure of feeding, discharges the residual impurities in the pipeline through the high-pressure discharge device, ensures that the pipeline is stably and uniformly filled with coal slurry, eliminates the stable influence of the pipeline resistance and the residual impurities on the coal slurry, ensures the stability and the continuity of the coal slurry flow, thereby ensuring that the coal slurry entering the furnace and the oxygen can be controlled in the required range; the flexibility of valve action is improved, the influence of impurities and air resistance on the valve action is eliminated, the valve delay or misoperation probability is reduced, and the dual functions of ensuring program control smoothness and stable coal slurry flow are achieved; the reality that reflects the coal slurry flow avoids the air lock to replace the coal slurry and gets into the gasifier for measuring instrument mistake reading, and the deviation of measuring instrument and actual oxygen coal ratio finally causes even the interlocking is put into operation, also arouses the consequence of the major incident that the stove was exploded, promotes gasifier and throws material success rate and operation safety greatly, passes through the authenticity of local measuring instrument seal coal slurry pump rotational speed regulation program control device and remote flow monitoring instrument.
Drawings
Fig. 1 is a schematic structural view of a coal water slurry steady flow protection device of the present invention.
In the figure, 1, a coal slurry pump, 2, a remote flow monitoring instrument, 3, a temperature display instrument, 4, a coal slurry return valve, 5, a pressure display instrument, 6, an in-situ flow monitoring instrument, 7, a coal slurry pump rotating speed regulator, 8, a gasification furnace, 9, a furnace inlet valve, 10, a waste discharge valve and 11, a return pipeline.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model relates to a coal water slurry steady flow protection device, as shown in figure 1, including coal slurry pump 1, the intercommunication has gasifier 8 on coal slurry pump 1, dispose waste discharge valve 10 between coal slurry pump 1 and gasifier 8, still disposed fire door valve 9 between waste discharge valve 10 and the gasifier 8, waste discharge valve 10 has two at least, two adjacent waste discharge valves 10 are connected in series, disposed local flow monitoring instrument 6 between waste discharge valve 10 and fire door valve 9, still disposed return line 11 between coal slurry pump 1 and gasifier 8, disposed coal slurry reflux valve 4 on return line 11, return line 11 is located between waste discharge valve 10 and coal slurry pump 1, disposed temperature display instrument 3 between return line 11 and coal slurry pump 1, disposed pressure display instrument 5 between return line 11 and coal slurry pump 1, still disposed remote flow monitoring instrument 2 between return line 11 and coal slurry pump 1, the coal slurry pump 1 is provided with a coal slurry pump rotating speed regulator 7, and the coal slurry pump rotating speed regulator 7 is in signal connection with the remote flow monitoring instrument 2.
The utility model relates to a coal slurry stationary flow protection device, before the gasifier throws the material, observe local flow monitoring instrument 6 and remote flow monitoring instrument 2's reading for judge whether there is gas, water and impurity resistance in the pipeline. If the reading of the local flow monitoring instrument 6 is low, resistance exists, the waste discharge valve 10 is opened, the mixture of gas, water and impurities is extruded by coal slurry with pressure, the reading of the local flow monitoring instrument 6 is continuously observed, if the reading is basically the same as and stable to the reading of the remote flow monitoring instrument 2, the impurities are completely discharged, the coal slurry is filled in the pipeline, the waste discharge valve 10 is quickly closed, the feeding operation is started, and the mixture of gas, water and impurities, which obstructs the flow of the coal slurry and influences the opening of the coal slurry feeding program control valve, does not exist in the pipeline any more, so that the coal slurry can smoothly pass through the furnace inlet valve 9, and enters the gasification furnace in the specified time together with high-pressure oxygen from an oxygen pipeline according to the original sequential control steps, and the primary success of feeding can be guaranteed.
Meanwhile, during normal operation, parameter comparison can be formed between the local flow monitoring instrument 6, the coal slurry pump rotating speed regulator 7 and the remote flow monitoring instrument 2, stable operation of the measuring system can be realized through two-out-of-three logic, and when any one display point is in fault, judgment can be carried out through other two display points, so that a new judgment basis is provided for stable operation of the coal slurry pump and long-period operation of the gasification system. Through coal slurry pump rotational speed modulator 7 and remote flow monitoring instrument 2, can adjust the rotational speed of coal slurry pump 1 to the velocity of flow of control coal slurry, through temperature and pressure in temperature display instrument 3 and the pressure display instrument 5 ability real-time supervision pipeline, guarantee the normal stove that goes into of coal slurry.
The utility model relates to a coal slurry stationary flow protection device, solved the feeding process that exists among the prior art because the resistance exists and causes the oxygen coal to compare interlocking signal trigger, thereby lead to throwing the material failure problem, through in high pressure discharging equipment, discharge residual impurity in the pipeline, make the pipeline fill with the coal slurry steadily evenly, eliminate pipeline resistance and residual impurity and to the stable influence of coal slurry, guarantee the stability and the continuity that the coal slurry flows, thereby guarantee to go into stove coal slurry and oxygen and can control in the required scope; the flexibility of valve action is improved, the influence of impurities and air resistance on the valve action is eliminated, the valve delay or misoperation probability is reduced, and the dual functions of ensuring program control smoothness and stable coal slurry flow are achieved; the reality that reflects the coal slurry flow avoids the air lock to replace the coal slurry and gets into the gasifier for measuring instrument mistake reading, and the deviation of measuring instrument and actual oxygen coal ratio finally causes even the interlocking is put into operation, also arouses the consequence of the major incident that the stove was exploded, promotes gasifier and throws material success rate and operation safety greatly, passes through the authenticity of local measuring instrument seal coal slurry pump rotational speed regulation program control device and remote flow monitoring instrument.
Claims (4)
1. A coal water slurry steady flow protection device is characterized by comprising a coal slurry pump (1), wherein a gasification furnace (8) is communicated with the coal slurry pump (1), a waste discharge valve (10) is arranged between the coal slurry pump (1) and the gasification furnace (8), and a furnace inlet valve (9) is arranged between the waste discharge valve (10) and the gasification furnace (8);
an on-site flow monitoring instrument (6) is arranged between the waste discharge valve (10) and the furnace inlet valve (9);
a return pipeline (11) is also arranged between the coal slurry pump (1) and the gasification furnace (8), a coal slurry return valve (4) is arranged on the return pipeline (11), and the return pipeline (11) is positioned between the waste discharge valve (10) and the coal slurry pump (1);
still set remote flow monitoring instrument (2) between return line (11) and coal slurry pump (1), set coal slurry pump rotational speed regulator (7) on coal slurry pump (1), coal slurry pump rotational speed regulator (7) signal connection remote flow monitoring instrument (2).
2. The coal water slurry flow stabilizing protection device according to claim 1, wherein there are at least two said waste valves (10), and two adjacent said waste valves (10) are connected in series.
3. The coal water slurry steady flow protection device according to claim 1, characterized in that a temperature display instrument (3) is arranged between the return pipeline (11) and the coal water slurry pump (1).
4. The coal water slurry steady flow protection device according to claim 1, characterized in that a pressure display instrument (5) is arranged between the return pipeline (11) and the coal water slurry pump (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020764055.0U CN212982891U (en) | 2020-05-11 | 2020-05-11 | Coal water slurry steady flow protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020764055.0U CN212982891U (en) | 2020-05-11 | 2020-05-11 | Coal water slurry steady flow protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212982891U true CN212982891U (en) | 2021-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020764055.0U Active CN212982891U (en) | 2020-05-11 | 2020-05-11 | Coal water slurry steady flow protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212982891U (en) |
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2020
- 2020-05-11 CN CN202020764055.0U patent/CN212982891U/en active Active
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Wenquan Inventor after: Wei Xiaoni Inventor after: Yao Guoqiang Inventor after: Zhang Baoli Inventor before: Wang Wenquan Inventor before: Wei Xiaoni Inventor before: Yao Guoqiang Inventor before: Zhang Baoli |
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| CB03 | Change of inventor or designer information |