CN110905783A - Nitrogen-hydrogen compressor self-updating system based on safety and working method thereof - Google Patents
Nitrogen-hydrogen compressor self-updating system based on safety and working method thereof Download PDFInfo
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- CN110905783A CN110905783A CN201911112121.4A CN201911112121A CN110905783A CN 110905783 A CN110905783 A CN 110905783A CN 201911112121 A CN201911112121 A CN 201911112121A CN 110905783 A CN110905783 A CN 110905783A
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- nitrogen
- loop
- hydrogen compressor
- hydrogen
- gas holder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/06—Combinations of two or more pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/007—Installations or systems with two or more pumps or pump cylinders, wherein the flow-path through the stages can be changed, e.g. from series to parallel
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention discloses a safety-based nitrogen-hydrogen gas compressor self-regulation system and a working method thereof, wherein the system comprises a gas holder, a Roots blower and a nitrogen-hydrogen gas compressor, wherein a first loop, a second loop and a near loop of the nitrogen-hydrogen gas compressor are in a self-regulation state, so that the first loop, the second loop and the near self-regulation loop are connected with the height of the gas holder; the inlet and outlet pipelines of the Roots blower are communicated with a blower safety water seal; the height of the gas holder is respectively connected with a first loop, a second loop and a near loop of the nitrogen-hydrogen compressor according to the low newspaper and the low newspaper; the inside of nitrogen hydrogen compressor is equipped with DCS control system, be equipped with gas holder height detector in the DCS control system, realize the detection to the gas holder height. The invention improves the gas compressor near the way, combines the combined application of the Roots blower safety water seal, stops the possibility of ultralow and negative pressure pumping of the gas making gas holder, improves the safety of the production process and achieves the purpose of intrinsic safety.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to a nitrogen-hydrogen compressor self-updating system based on safety and a working method thereof.
Background
Small nitrogen fertilizer enterprises in China still account for a large proportion in the nitrogen fertilizer industry until now, and in all the small nitrogen fertilizer enterprises in China running at present, a nitrogen-hydrogen compressor is almost adopted for gas compression. Compared with other types of compressors, the nitrogen-hydrogen compressor has the advantages of minimum investment, the most mature technology and normal operation, thereby occupying huge proportion in small nitrogen fertilizer enterprises in China. However, as the requirement of the country for safe production is strengthened day by day, the problem of manual adjustment of the loop becomes a bottleneck restricting the safe development of the industry. Gaseous compression of china's small nitrogenous fertilizer trade belongs to class A device, and the installation regulation requirement must reach unmanned on duty state, and some small nitrogenous fertilizer enterprises can't normally operate because of the safety problem, and some enterprises face even the nightmare that stops production and remain standstill.
At present, a gas compression loop commonly adopted in the small nitrogen fertilizer industry manually opens a one-loop and a two-loop one-loop near path of a gas compressor when gas generation and gas supply are in shortage or abnormal conditions occur in production, and then informs a Roots blower to operate and manually open the Roots blower near path to relieve abnormal conditions of production, manual adjustment is not timely when meeting, secondary accidents are easily caused, threats are brought to safety production, and the gas compression loop is also a root cause for increasing the detection strength of small nitrogen fertilizers in recent countries and places.
Disclosure of Invention
The invention provides a nitrogen-hydrogen gas compressor self-regulation new system based on safety and a working method thereof for overcoming the defects of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a nitrogen-hydrogen gas compressor self-regulation system based on safety comprises a gas holder, a Roots blower and a nitrogen-hydrogen gas compressor, wherein a first-loop, a second-loop and a first-proximity loop of the nitrogen-hydrogen gas compressor are in a self-regulation state, and the first-loop, the second-loop and first-proximity loops are connected with the height of the gas holder; the inlet and outlet pipelines of the Roots blower are communicated with a blower safety water seal; the height of the gas holder is respectively connected with a first loop, a second loop and a near loop of the nitrogen-hydrogen compressor according to the low newspaper and the low newspaper; the inside of nitrogen hydrogen compressor is equipped with DCS control system, be equipped with gas holder height detector in the DCS control system, realize the detection to the gas holder height.
Preferably, the self-adjusting state is automatically adjusted and controlled by adopting a DCS automatic adjusting valve.
Preferably, the low alarm is that the height of the gas holder reaches a low limit alarm value, and the low limit alarm value is 25% of the total volume of the gas holder.
Preferably, the alarm value corresponding to the low alarm is 15% of the total volume of the gas holder.
A working method of a self-refreshing system utilizing a nitrogen-hydrogen gas compressor based on safety specifically comprises the following steps:
during normal production operation, the nitrogen-hydrogen compressor automatically adjusts the close path to close in one loop, automatically adjusts the close path to close in two loops, and the safe water seal of the Roots blower is in a closed state; when the height of the gas holder reaches a low reporting limit value, the nitrogen-hydrogen compressor DCS control system is linked with the nitrogen-hydrogen compressor to automatically open in a one-return and one-near way, because the pressure of the outlet of one section of the nitrogen-hydrogen compressor is far higher than that of the inlet of one section of the nitrogen-hydrogen compressor, the pressure of the outlet of one section of the nitrogen-hydrogen compressor instantly impacts the inlet of one section of the nitrogen-hydrogen compressor, so that the pressure of the outlet of the Roots blower is increased, and when the pressure of the outlet of one section of the nitrogen-hydrogen compressor exceeds the safety water seal set value of the Roots blower; when the gas holder further descends and reaches the low reporting limit value, the nitrogen-hydrogen compressor DCS control system is linked with the nitrogen-hydrogen compressor two-loop one-loop close circuit to be automatically opened, and because the pressure of the second-segment outlet of the nitrogen-hydrogen compressor is far higher than the pressure of the first-segment inlet of the nitrogen-hydrogen compressor, the pressure of the second-segment outlet of the nitrogen-hydrogen compressor instantly impacts the first-segment inlet of the nitrogen-hydrogen compressor, the pressure of the outlet of the Roots blower is increased again, a part of gas automatically converges into the gas holder again, and the height of the gas holder is further.
The invention has the beneficial effects that:
the invention optimizes the traditional near-path adjusting process of the nitrogen-hydrogen compressor, realizes unattended operation, fundamentally avoids the occurrence of safety accidents, simultaneously reduces the labor intensity, greatly improves the scientificity and rationality of the production process and achieves the purpose of intrinsic safety.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings in which like reference numerals denote like features throughout the several views, wherein:
FIG. 1 is a flow chart of the system and process of the present invention.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
embodiment 1 referring to fig. 1, a safety-based nitrogen-hydrogen gas compressor self-refreshing system comprises a gas holder, a roots blower and a nitrogen-hydrogen gas compressor; a DCS control system is arranged in the nitrogen-hydrogen gas compressor, and a gas cabinet height detector is arranged in the DCS control system to detect the height of the gas cabinet; wherein, the gas holder height detector can be a Rosemont 3051 height detector;
the one-loop and two-loop and one-loop approach of the nitrogen and hydrogen compressor is in a self-regulating state, and the self-regulating state is automatically regulated and controlled by adopting a DCS (distributed control system) automatic regulating valve; the one-loop and two-loop one-loop self-adjusting approach path is connected with the height of a gas cabinet, specifically, the height of the gas cabinet is connected with the one-loop and two-loop one-loop DCS automatic regulating valve of a nitrogen and hydrogen compressor, and the opening and closing of the DCS automatic regulating valve are controlled through a gas cabinet height signal;
the inlet and outlet pipelines of the Roots blower are communicated with a blower safety water seal;
the height of the gas holder is respectively connected with a first loop, a second loop and a near loop of the nitrogen-hydrogen compressor according to the low newspaper and the low newspaper; the low alarm is that the height of the gas holder reaches a low limit alarm value, and the low limit alarm value is 25% of the total volume of the gas holder. The alarm value corresponding to the low-low report is 15% of the total volume of the gas holder.
When the gas holder reached low reporting limit value, the chain nitrogen hydrogen compressor of nitrogen hydrogen compressor DCS control system was opened automatically in one way nearly, reached the automatic opening in two ways nearly of the chain nitrogen hydrogen compressor of nitrogen hydrogen compressor DCS control system when reporting limit value at the bottom, and gas flows back to the low pressure end from the high pressure end of nitrogen hydrogen compressor, flows back to the gas holder through fan safety water seal.
A working method of a self-refreshing system utilizing a nitrogen-hydrogen gas compressor based on safety specifically comprises the following steps:
during normal production operation, the nitrogen-hydrogen compressor is automatically adjusted to close the way in one loop, and is automatically adjusted to close the way in two loops, so that the safety water seal of the Roots blower is in a closed state. When the height of the gas holder reaches the low alarm limit value (800 m)3) When the pressure exceeds the safe water seal set value of the Roots blower (generally about 0.05 MPa), the safe water seal of the Roots blower is automatically opened, so that gas automatically flows into the gas cabinet, and the further reduction of the height of the gas cabinet is slowed down. When the gas holder further descends to reach the low alarm limit value (500 m)3) The second loop and the first loop of the nitrogen-hydrogen compressor are automatically started by the DCS control system of the time-varying nitrogen-hydrogen compressor, and the pressure of the second-segment outlet of the nitrogen-hydrogen compressor (normally about 0.85 MPa) is further higher than the pressure of the first-segment inlet of the nitrogen-hydrogen compressor (normally about 0.05 MPa), namely the pressure of the outlet of the Roots blower, so that the pressure of the second-segment outlet of the nitrogen-hydrogen compressor is instantaneously raisedImpact one section of entry of nitrogen hydrogen compressor between, roots's fan exit pressure promptly, make roots's fan exit pressure increase once more, partly gaseous automatic gas holder that converges once more, further slow down the further decline of gas holder height.
The invention optimizes the traditional near-path adjusting process of the nitrogen-hydrogen compressor, realizes unattended operation, fundamentally avoids the occurrence of safety accidents, simultaneously reduces the labor intensity, greatly improves the scientificity and rationality of the production process and achieves the purpose of intrinsic safety.
It should be noted that the above-mentioned embodiments are only some of the preferred modes for implementing the invention, and not all of them. Obviously, all other embodiments obtained by persons of ordinary skill in the art based on the above-mentioned embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
Claims (5)
1. A nitrogen-hydrogen compressor self-regulation system based on safety comprises a gas holder, a Roots blower and a nitrogen-hydrogen compressor, and is characterized in that a first loop, a second loop and a near loop of the nitrogen-hydrogen compressor are in self-regulation states, and the first loop, the second loop and the near loop are connected with the height of the gas holder; the inlet and outlet pipelines of the Roots blower are communicated with a blower safety water seal; the height of the gas holder is respectively connected with a first loop, a second loop and a near loop of the nitrogen-hydrogen compressor according to the low newspaper and the low newspaper; the inside of nitrogen hydrogen compressor is equipped with DCS control system, be equipped with gas holder height detector in the DCS control system, realize the detection to the gas holder height.
2. The safety-based nitrogen-hydrogen gas compressor self-regulation system as claimed in claim 1, wherein the self-regulation state is that DCS automatic regulating valve is adopted for automatic regulation control.
3. The safety-based self-refreshing system for nitrogen-hydrogen compressors according to claim 1, wherein the low alarm is that the height of the gas holder reaches a low alarm value, and the low alarm value is 25% of the total volume of the gas holder.
4. The safety-based self-refreshing system for nitrogen-hydrogen gas compressors according to claim 1, wherein the alarm value corresponding to the low-low alarm is 15% of the total volume of the gas holder.
5. The working method of the safety-based nitrogen-hydrogen gas compressor self-refreshing system in the claim 1 is characterized by comprising the following steps:
during normal production operation, the nitrogen-hydrogen compressor automatically adjusts the close path to close in one loop, automatically adjusts the close path to close in two loops, and the safe water seal of the Roots blower is in a closed state; when the height of the gas holder reaches a low reporting limit value, the nitrogen-hydrogen compressor DCS control system is linked with the nitrogen-hydrogen compressor to automatically open in a one-return and one-near way, because the pressure of the outlet of one section of the nitrogen-hydrogen compressor is far higher than that of the inlet of one section of the nitrogen-hydrogen compressor, the pressure of the outlet of one section of the nitrogen-hydrogen compressor instantly impacts the inlet of one section of the nitrogen-hydrogen compressor, so that the pressure of the outlet of the Roots blower is increased, and when the pressure of the outlet of one section of the nitrogen-hydrogen compressor exceeds the safety water seal set value of the Roots blower; when the gas holder further descends and reaches the low reporting limit value, the nitrogen-hydrogen compressor DCS control system is linked with the nitrogen-hydrogen compressor two-loop one-loop close circuit to be automatically opened, and because the pressure of the second-segment outlet of the nitrogen-hydrogen compressor is far higher than the pressure of the first-segment inlet of the nitrogen-hydrogen compressor, the pressure of the second-segment outlet of the nitrogen-hydrogen compressor instantly impacts the first-segment inlet of the nitrogen-hydrogen compressor, the pressure of the outlet of the Roots blower is increased again, a part of gas automatically converges into the gas holder again, and the height of the gas holder is further.
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| CN201911112121.4A CN110905783B (en) | 2019-11-14 | 2019-11-14 | Nitrogen-hydrogen compressor self-updating system based on safety and working method thereof |
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| CN110905783B CN110905783B (en) | 2021-05-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113586954A (en) * | 2021-06-16 | 2021-11-02 | 合肥通用机械研究院有限公司 | Gas compression storage system and control method |
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Denomination of invention: A new self regulating system of nitrogen and hydrogen compressor based on safety and its working method Effective date of registration: 20211215 Granted publication date: 20210525 Pledgee: Linshu sub branch of Linshang Bank Co.,Ltd. Pledgor: JINYIMENG GROUP CO.,LTD. Registration number: Y2021980014898 |
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