CN203348056U - Improved device of overpressure protection system of high-pressure coal slurry pump - Google Patents
Improved device of overpressure protection system of high-pressure coal slurry pump Download PDFInfo
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- CN203348056U CN203348056U CN 201320363456 CN201320363456U CN203348056U CN 203348056 U CN203348056 U CN 203348056U CN 201320363456 CN201320363456 CN 201320363456 CN 201320363456 U CN201320363456 U CN 201320363456U CN 203348056 U CN203348056 U CN 203348056U
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Abstract
The utility model belongs to the technical field of coal water slurry gasifying equipment, and particularly relates to an improved device of an overpressure protection system of a high-pressure coal slurry pump. The improved device comprises the overpressure protection system connected with the high-pressure coal slurry pump, and the overpressure protection system comprises a hydraulic oil one-way valve, a hydraulic oil pipe, an overpressure protection safety valve and an oil discharge hand valve, wherein the high-pressure coal slurry pump, the hydraulic oil pipe, the overpressure protection safety valve and the oil discharge hand valve are sequentially communicated. The improved device is characterized in that a buffer tank is arranged on the hydraulic oil pipe and the bottom portion of the buffer tank is communicated with the hydraulic oil pipe; an elastic gas bag which can expand or contract along with pressure changes is arranged inside the buffer tank, wherein the elastic gas bag is filled with nitrogen. According to the improved device, when oil temperatures rises along with air temperature, miniature size expansion of hydraulic oil can be transmitted to the nitrogen bag inside the buffer tank to enable the gas bag to be compressed slightly, so that the oil pressure which rises sharply can be relieved; the pressure before the overpressure protection safety valve is kept to be normal working pressure constantly, the pressure is matched with the pressure of materials at a pump outlet, and pressure fluctuation is very little. Therefore, manual pressure releasing is not needed, and the threat that the safety valve jumps is eliminated thoroughly.
Description
Technical field
The utility model belongs to the coal water slurry gasification equipment technical field, is specifically related to a kind of device for high-pressure coal pulp pump, especially for the abnormal modifying device of high-pressure coal pulp pump overpressure protection system oil pressure.
Background technique
Coal water slurry gasification has become industry in worldwide, and coal resources in China is very abundant, and petroleum resources are relative shortage, and coal replacing oil is national energy strategy development trend.Exploration and practice through domestic and international many decades, mix with water, additive with raw coal and be mixed with the slurry of finite concentration and viscosity through milling---water coal slurry has now become a kind of New-type fuel or industrial chemicals that can displace oils in some fields, because the about alternative 1 t fuel oil of water coal slurry of 2 t left and right uses or gas processed
[1], the development of making industry in worldwide of water coal slurry is very rapid.Due to succeeding in developing of water coal slurry pressure gasification technology, greatly expanded the application of COAL-WATER SLURRY TECHNOLOGY.2003, Nanjing Chemical Industry Co., Ltd., SINOPEC's synthesis ammonia system has started to carry out raw material and has been transferred to the transformation of water coal slurry by heavy oil, on January 11st, 2006, this overlaps in the world the coal gasification apparatus of design and operation pressure the highest (8.7 MPa) take water coal slurry and feeds intake successfully as raw material.
High-pressure coal pulp pump is that coal gasification apparatus is carried the heart feeding equipment of coal slurry to coal gasifier, working condition requirement is very strict, must guarantee long period (more than 2 months) continuous and steady operation incessantly, even if the stoppage in transit of moment, also will cause package unit to stop, and can cause huge economic loss.Therefore selecting of high-pressure coal pulp pump is very crucial, and its performance is had to very high requirement, the high-pressure coal pulp pump of most coal gasification apparatus has all been selected the comparatively diaphragm pump of ripe famous enterprise of technology.
Holland GEHO pump industry was just taken to the research and development production of pump from 1916, its diaphragm pump machining accuracy is high, data capture, operation control system are accurate, the flowed fluctuation of pump is little, rubber parts matter is good and durable, under nominal situation, barrier film can guarantee in 8 000 h not damaged, thereby selected by many coal gasification apparatus in the whole nation.
The chief component of Holland GEHO diaphragm pump comprises main motor, speed reducer, frequency variator, crankshaft-link rod (crank), crosshead, piston, hydraulic oil system, chamber of septum and barrier film, import and export one-way valve, auxiliary pump etc.
The working principle of GEHO pump is that main motor slows down through speed reducer, the driving crank connecting rod, crosshead, make to rotatablely move and transfer straight line motion to, the drive piston moves back and forth, chamber of septum is embedded with barrier film, be full of the hydraulic oil of sealing between piston and barrier film, the effect of barrier film is that the hydraulic oil of coal slurry material and driving is isolated, avoid coal slurry directly to contact with the internals such as piston, cause unnecessary abrasion and corrosion, barrier film rouses and opens and adhesive along with the to-and-fro motion of piston and under the driving of hydraulic oil medium, during suction stroke, exporting unmarried valve closes, coal slurry in the coal slurry tank is under the effect of potential energy, push the import one-way valve open, inject chamber of septum (material end), while releasing stroke, feed check valve is closed, piston is by the pressure transmission of hydraulic oil and barrier film, make the coal slurry of chamber of septum (material end) push the outlet one-way valve open and extrude.Hydraulic pressure end at main pump, also be provided with the overpressure protection system be connected with each chamber of septum.
In the situation that the normal operation of diaphragm pump, the maximum oil pressure in chamber of septum is identical with delivery side of pump pressure all the time, and the oil pressure before safety valve is because deriving from the oil pressure in chamber of septum, therefore also should be identical with the coal slurry pressure of pump discharge.But in the actual moving process of diaphragm pump; usually in the situation that pump discharge coal slurry constant pressure; the upstream pressure of overpressure protection system safety valve substantially exceeds the maximum oil pressure of each chamber of septum sometimes, surpasses the coal slurry pressure of pump discharge, and can constantly increase.In the case, as not manually release, the upstream pressure of safety valve even can surpass the release pressure of safety valve, this will bring and have a strong impact on the stable operation of system, if safety valve moves under high pressure conditions, chamber of septum moment of coal slurry pump a large amount of hydraulic oil of can draining, the coal slurry flow of coal slurry pump output will be die-offed, may make into stove coal slurry flow too lowly, the initiating system interlocking action of stopping, cause apparatus system to stop.
For addressing this problem, although adopted several different methods at present, as being avoids shining of sunlight to shine, the special color steel watt canopy of having built to the GEHO high-pressure coal pulp pump, or cooling water on probation is to temporary measures such as the hydraulic oil pipe between one-way valve and safety valve are sprayed, although also obtained some effects, the manual release number of times that can reduce every day, all can not deal with problems thoroughly.And the said method means do not meet the field management requirement of enterprise yet.
Summary of the invention
The purpose of this utility model is for the problems referred to above, and a kind of high-pressure coal pulp pump overpressure protection system modifying device proposed.
Main technical schemes of the present utility model: high-pressure coal pulp pump overpressure protection system modifying device, comprise the overpressure protection system be connected with high-pressure coal pulp pump, overpressure protection system comprises hydraulic oil one-way valve, hydraulic oil pipe, overpressure protection safety valve and the emptying hand valve be communicated with successively, it is characterized in that being provided with knock out drum on hydraulic oil pipe, the knock out drum bottom communicates with hydraulic oil pipe; In described knock out drum, have one can change and the elastic bag of the inflated with nitrogen of diastole or compression with pressure.
Usually, high-pressure coal pulp pump described in the utility model is all high-pressure diaphragm pumps that have the superpressure Oil protective system, especially Dutch GEHO diaphragm pump.
Described elastic bag is rubber pneumatic bag.
The nitrogen pressure setting value that described elastic bag is filled with is 60% of high-pressure coal pulp pump export pressure.
The water coal slurry pressure gasification technology now worldwide is widely adopted, turn round and overlap at the large-scale coal gasification apparatus of building existing more than 40 in the whole nation at present, high-pressure coal pulp pump is most important moving equipment in coal gasification apparatus, can this key equipment move with security and stability, is the basic premise of a whole set of coal gasification apparatus long-period stable operation.
Modifying device of the present utility model; when oil temperature raises with temperature; the small volumetric expansion of hydraulic oil will pass to the nitrogen air bag in knock out drum; air bag is compressed slightly, and make the oil pressure that original meeting increases suddenly be releived, the pressure before the safety valve of overpressure protection system is constant in normal working pressure all the time; with the material pressure of pump discharge, match; the fluctuation of pressure is very little, from then on no longer needs manual release, and the threat of safety valve jumping up is thoroughly eliminated.
The accompanying drawing explanation
The structural representation that accompanying drawing 1 is the utility model embodiment overpressure protection system.
In figure, the 1-diaphragm pump; 2-emptying hand valve; The 3-hydraulic oil pipe; 4-hydraulic oil one-way valve; 5-overpressure protection safety valve; The 6-emergency valve seat; The 7-pressure gauge; 8-safety valve discharge pipe; The 9-knock out drum.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in detail.
Embodiment
It is example that the present embodiment be take the Dutch GEHO diaphragm pump of certain coal water slurry gasifying device.
Embodiment's high-pressure coal pulp pump overpressure protection system modifying device as shown in Figure 1; comprise the overpressure protection system be connected with diaphragm pump 1; overpressure protection system comprises hydraulic oil one-way valve 4, hydraulic oil pipe 3, overpressure protection safety valve 5 and the emptying hand valve 2 be communicated with successively; it mainly improves is to be provided with knock out drum 9 on hydraulic oil pipe 3; in described knock out drum 9, have one can change and the rubber pneumatic bag of the inflated with nitrogen of diastole or compression with pressure, knock out drum 9 bottoms communicate with hydraulic oil pipe 3.
Embodiment also comprises that this installs conventional emergency valve seat 5, pressure gauge 7 and safety valve discharge pipe 8.
In embodiment, during nominal situation, the coal slurry pressure of diaphragm pump outlet output approaches approximately 10 MPA, the hydraulic oil of each chamber of septum (totally 3) is connected with the overpressure protection safety valve by the hydraulic oil pipe after a hydraulic oil one-way valve and one-way valve separately, if leading to the coal slurry delivery line of gasification oven stops up because of burner, the abnormal conditions such as coal slurry pump outlet one-way valve jam or valve misoperation cause the indoor hydraulic fluid pressure of pump diaphragm suddenly to raise, hydraulic oil can pass to pressure on the safety valve of overpressure protection by the one-way valve be connected with chamber of septum, as the pressure that passes to safety valve surpasses the take-off setting value (13.8 MPa) of safety valve, safety valve will move, carry out the oil extraction release, avoid pump impaired because of superpressure.
In embodiment; when the oil temperature in the overpressure protection oil pipe raises because of day and night temperature or by a day illumination solarization; the volumetric expansion that hydraulic oil is small will pass to the nitrogen air bag in knock out drum; air bag is compressed slightly; and make the oil pressure that original meeting increases suddenly be releived, and the pressure before the safety valve of overpressure protection system is constant in about 10 MPa all the time, and the fluctuation of pressure is very little; from then on no longer need manual release, the threat of safety valve jumping up is thoroughly eliminated.
Claims (5)
1. high-pressure coal pulp pump overpressure protection system modifying device, comprise the overpressure protection system be connected with high-pressure coal pulp pump, overpressure protection system comprises hydraulic oil one-way valve, hydraulic oil pipe, overpressure protection safety valve and the emptying hand valve be communicated with successively, it is characterized in that being provided with knock out drum on hydraulic oil pipe, the knock out drum bottom communicates with hydraulic oil pipe; In described knock out drum, have one can change and the elastic bag of the inflated with nitrogen of diastole or compression with pressure.
2. high-pressure coal pulp pump overpressure protection system modifying device as claimed in claim 1, is characterized in that described high-pressure coal pulp pump is the high-pressure diaphragm pump that has the superpressure Oil protective system.
3. high-pressure coal pulp pump overpressure protection system modifying device as claimed in claim 2, is characterized in that described high-pressure diaphragm pump is Dutch GEHO diaphragm pump.
4. high-pressure coal pulp pump overpressure protection system modifying device as claimed in claim 1, is characterized in that described elastic bag is rubber pneumatic bag.
5. high-pressure coal pulp pump overpressure protection system modifying device as claimed in claim 1, is characterized in that the nitrogen pressure setting value that described elastic bag is filled with is 60% of high-pressure coal pulp pump export pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320363456 CN203348056U (en) | 2013-06-24 | 2013-06-24 | Improved device of overpressure protection system of high-pressure coal slurry pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320363456 CN203348056U (en) | 2013-06-24 | 2013-06-24 | Improved device of overpressure protection system of high-pressure coal slurry pump |
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| Publication Number | Publication Date |
|---|---|
| CN203348056U true CN203348056U (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320363456 Expired - Fee Related CN203348056U (en) | 2013-06-24 | 2013-06-24 | Improved device of overpressure protection system of high-pressure coal slurry pump |
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| Country | Link |
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| CN (1) | CN203348056U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291595A (en) * | 2013-06-24 | 2013-09-11 | 中国石化集团南京化学工业有限公司 | Improved device for overpressure protection system of high-pressure coal slurry pump |
-
2013
- 2013-06-24 CN CN 201320363456 patent/CN203348056U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291595A (en) * | 2013-06-24 | 2013-09-11 | 中国石化集团南京化学工业有限公司 | Improved device for overpressure protection system of high-pressure coal slurry pump |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 Termination date: 20140624 |
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| EXPY | Termination of patent right or utility model |