CN205784228U - LNG plant area load governor - Google Patents
LNG plant area load governor Download PDFInfo
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- CN205784228U CN205784228U CN201620670943.XU CN201620670943U CN205784228U CN 205784228 U CN205784228 U CN 205784228U CN 201620670943 U CN201620670943 U CN 201620670943U CN 205784228 U CN205784228 U CN 205784228U
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- heat exchanger
- flow
- tube heat
- wound tube
- control valve
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Abstract
The utility model discloses LNG plant area load governor, including three sections of wound tube heat exchangers and cryogen separatory tank, being provided with control valve and temperature measuring set on raw material outlet line, the flowmeter on raw material admission line is provided with the flow-rate ratio functional module being connected with the 3rd temperature measuring set；Also being provided with the flow-rate ratio functional module being connected with first flow control valve on the temperature measuring set on raw material outlet line connected on first paragraph wound tube heat exchanger, also connecting between temperature measuring set and integrated circuit modules on raw material outlet line that second segment wound tube heat exchanger connects has flow-rate ratio functional module；Also connect between flowmeter and integrated circuit modules in refrigerant lines and have flow-rate ratio functional module.This utility model controller can automatically ramp up to set point with the speed of maximum stream flow 0.5%, reaches automatically to adjust the purpose of plant area's load, reduces the maloperation of operator, it is ensured that the stable operation of factory.
Description
Technical field
This utility model relates to LNG production facility field, specifically a kind of LNG plant area load governor.
Background technology
LNG(liquefied natural gas) it is gas-field exploitation natural gas out, through dehydration, de-sour gas
And heavy hydrocarbons, the cryogenic liquid then compress, expand, liquefied.LNG is storage and the transport shape of a kind of uniqueness of natural gas
Formula, it is conducive to the recovery of the long distance transportation of natural gas, beneficially outlying natural gas, the storage cost of reduction natural gas, has
It is beneficial to the peak regulation in natural gas applications.Azeotrope refrigeration production LNG is that application is relatively broad, flow process is relatively easy at present, throws
Rate are with relatively low liquefaction technology.Its principle is to use azeotrope as cooling working medium, carries out throttling expansion step by step
Obtain the refrigerating capacity of different temperatures level, to reach progressively to cool down the purpose with liquefied natural gas.Azeotrope cooling flow is grasped
Make elasticity very big, when the i.e. plant area's load adjustment of production capacity, need to keep azeotrope system by change cold-producing medium composition
Cold efficiency, the regulation of cryogen uses manual regulative mode more, operator is operated level requirement higher, it is impossible to realize full-automatic
Regulation, is easily caused the fluctuation of each parameter of factory, causes the instability of production when regulation error.
Summary of the invention
The purpose of this utility model is to provide a kind of LNG plant area load governor, to solve above-mentioned background technology
The problem of middle proposition.
For achieving the above object, the following technical scheme of this utility model offer:
LNG plant area load governor, including first paragraph wound tube heat exchanger, second segment wound tube heat exchanger, the 3rd
Section wound tube heat exchanger and cryogen separatory tank, raw material admission line is sequentially connected with first paragraph wound tube heat exchanger, second segment around pipe
Formula heat exchanger, the 3rd section of wound tube heat exchanger, the first refrigerant lines is sequentially connected with first paragraph wound tube heat exchanger, cryogen separatory
Tank, second segment wound tube heat exchanger, the 3rd section of wound tube heat exchanger, second refrigerant pipeline is sequentially connected with first paragraph and changes around tubular type
Hot device, second segment wound tube heat exchanger, cold-producing medium goes out that pipeline is sequentially connected with first paragraph wound tube heat exchanger, second segment changes around tubular type
Hot device, the 3rd section of wound tube heat exchanger,
First control valve and the 3rd temperature measuring set, first paragraph wound tube heat exchanger are installed on described raw material outlet line
And on the second refrigerant pipeline between second segment wound tube heat exchanger, first flow control valve being installed, second segment changes around tubular type
Being provided with second flow control valve in the first refrigerant lines between hot device and the 3rd section of wound tube heat exchanger, the 3rd section around pipe
In the first refrigerant lines connected on formula heat exchanger, flow control valve is installed；
Raw material admission line is provided with first flow measuring instrument, and first flow measuring instrument is provided with and the 3rd temperature measuring set
The first flow connected is connected in the first control valve than functional module, first flow measuring instrument；First paragraph wound tube heat exchanger
The raw material outlet line of upper connection is provided with the first temperature measuring set, and the first temperature measuring set is provided with and first flow control valve
The second flow connected has integrated than functional module and second flow than connection between functional module than functional module, first flow
Circuit module；The raw material outlet line connected on second segment wound tube heat exchanger is provided with the second temperature measuring set, the second temperature
Connecting between measuring instrument and integrated circuit modules has the 4th flow-rate ratio functional module, the 4th flow-rate ratio functional module to be connected to second
On flow control valve；First refrigerant lines is provided with second flow measuring instrument, and second flow measuring instrument is connected to Flow-rate adjustment
On valve, connect between second flow measuring instrument and integrated circuit modules and have the 3rd flow-rate ratio functional module.
As further program of the utility model: install in the refrigerant lines that the top of described cryogen separatory tank connects
There is pressure-control valve.
Compared with prior art, the invention has the beneficial effects as follows: the present invention is required former by controlling input in DCS system
The load percentage ratio of material gas, azeotrope circulating load in raw gas flow and wound tube heat exchanger in the wound tube heat exchanger of plant area
Set point can be automatically ramped up to the speed of maximum stream flow 0.5%, such that it is able to reach automatically to adjust the purpose of plant area's load, subtract
The maloperation of few operator, it is to avoid fluctuating widely of other parameters caused because of changing load, it is ensured that the stable fortune of factory
OK.
Accompanying drawing explanation
Fig. 1 is the structural representation of LNG plant area load governor.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Refer to Fig. 1, in the embodiment of the present invention, a kind of LNG plant area load governor, changes around tubular type including first paragraph
Hot device 1, second segment wound tube heat exchanger 2, the 3rd section of wound tube heat exchanger 3 and cryogen separatory tank 4, raw material admission line A is successively
Connect first paragraph wound tube heat exchanger 1, second segment wound tube heat exchanger 2, the 3rd section of wound tube heat exchanger 3, the first refrigerant pipe
Line C be sequentially connected with first paragraph wound tube heat exchanger 1, cryogen separatory tank 4, second segment wound tube heat exchanger 2, the 3rd section change around tubular type
Hot device 3, second refrigerant pipeline D is sequentially connected with first paragraph wound tube heat exchanger 1, second segment wound tube heat exchanger 2, and cold-producing medium goes out
Pipeline E is sequentially connected with first paragraph wound tube heat exchanger 1, second segment wound tube heat exchanger 2, the 3rd section of wound tube heat exchanger 3.
Being provided with the first control valve 37 and the 3rd temperature measuring set 31 on raw material outlet line B, first paragraph is around pipe type heat transfer
Being provided with first flow control valve 15 on second refrigerant pipeline D between device 1 and second segment wound tube heat exchanger 2, cryogen divides
Being provided with pressure-control valve 41 in the refrigerant lines on flow container 4 top, second segment wound tube heat exchanger 2 and the 3rd section change around tubular type
In the first refrigerant lines C between hot device 3, second flow control valve 22 is installed, the 3rd section of wound tube heat exchanger 3 connects
The first refrigerant lines C on flow control valve 32 is installed.
Raw material admission line A is provided with first flow measuring instrument 12, and first flow measuring instrument 12 is provided with and the 3rd temperature
The first flow that measuring instrument 31 connects is than functional module 11, and first flow measuring instrument 12 is connected in the first control valve 37；First
The raw material outlet line connected on section wound tube heat exchanger 1 is provided with the first temperature measuring set 13, on the first temperature measuring set 13
Being provided with the second flow being connected with first flow control valve 15 than functional module 14, first flow is than functional module 11 and second
Measure and have integrated circuit modules 34 than connecting between functional module 14；The raw material escape pipe connected on second segment wound tube heat exchanger 2
Line is provided with the second temperature measuring set 21, and connecting between the second temperature measuring set 21 and integrated circuit modules 34 has the 4th flow-rate ratio
Functional module 36, the 4th flow-rate ratio functional module 36 is connected in second flow control valve 22；First refrigerant lines C is provided with
Second flow measuring instrument 35, second flow measuring instrument 35 is connected on flow control valve 32, second flow measuring instrument 35 and integrated
Connect between circuit module 34 and have the 3rd flow-rate ratio functional module 33.
When designing normal duty range of operation, (first paragraph wound tube heat exchanger 1, second segment are around tubular type for liquefying plant
Heat exchanger 2 and the 3rd section of wound tube heat exchanger 3) mixed-refrigerant cycle amount can be adjusted by main load governor.Main
Load governor receives operator and inputs required device, and the load of unstripped gas in wound tube heat exchanger, as flow-rate ratio merit
Can the input signal of module, flow-rate ratio functional module also receives natural gas and goes out the flow control valve of ice chest at different levels simultaneously, i.e. liquefies
The output signal of outlet temperature, after analyzing and processing input signal, flow-rate ratio functional module distinguishes output signal again as stream
The input signal of control valve, adjusts the setting value of flow control valve according to input signal, and flow control valve exports letter the most respectively
Number act on the flow control valve of correspondence, thus automatically adjust refrigerant flow and raw gas flow makes plant area's load reach expection
Level.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of the spirit or essential attributes of the present invention, it is possible to realize the present invention in other specific forms.Therefore, no matter
From the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all by fall in the implication of equivalency and scope of claim
Change is included in the present invention.Should not be considered as limiting involved claim by any reference in claim.
Claims (2)
1.LNG plant area load governor, including first paragraph wound tube heat exchanger (1), second segment wound tube heat exchanger (2),
3rd section of wound tube heat exchanger (3) and cryogen separatory tank (4), raw material admission line (A) is sequentially connected with first paragraph around pipe type heat transfer
Device (1), second segment wound tube heat exchanger (2), the 3rd section of wound tube heat exchanger (3), the first refrigerant lines (C) is sequentially connected with
One section of wound tube heat exchanger (1), cryogen separatory tank (4), second segment wound tube heat exchanger (2), the 3rd section of wound tube heat exchanger
(3), second refrigerant pipeline (D) is sequentially connected with first paragraph wound tube heat exchanger (1), second segment wound tube heat exchanger (2), refrigeration
Agent go out pipeline (E) be sequentially connected with first paragraph wound tube heat exchanger (1), second segment wound tube heat exchanger (2), the 3rd section change around tubular type
Hot device (3), it is characterised in that
Being provided with the first control valve (37) and the 3rd temperature measuring set (31) on described raw material outlet line (B), first paragraph is around pipe
On second refrigerant pipeline (D) between formula heat exchanger (1) and second segment wound tube heat exchanger (2), first flow control is installed
Valve (15), in the first refrigerant lines (C) between second segment wound tube heat exchanger (2) and the 3rd section of wound tube heat exchanger (3)
Second flow control valve (22), the 3rd section of wound tube heat exchanger (3) the upper installation of upper the first refrigerant lines (C) connected are installed
There is flow control valve (32)；
Raw material admission line (A) is provided with first flow measuring instrument (12), and first flow measuring instrument (12) is provided with and the 3rd temperature
The first flow that degree measuring instrument (31) connects is connected to the first control valve than functional module (11), first flow measuring instrument (12)
(37) on；The upper raw material outlet line connected of first paragraph wound tube heat exchanger (1) is provided with the first temperature measuring set (13), and first
Temperature measuring set (13) is provided with the second flow being connected with first flow control valve (15) than functional module (14), first flow
Integrated circuit modules (34) is had than connecting between functional module (14) than functional module (11) and second flow；Second segment is around tubular type
The upper raw material outlet line connected of heat exchanger (2) is provided with the second temperature measuring set (21), the second temperature measuring set (21) and collection
Becoming to connect between circuit module 34 has the 4th flow-rate ratio functional module (36), the 4th flow-rate ratio functional module (36) to be connected to second
On flow control valve (22)；First refrigerant lines (C) is provided with second flow measuring instrument (35), second flow measuring instrument (35)
Being connected on flow control valve (32), connecting between second flow measuring instrument (35) and integrated circuit modules (34) has the 3rd flow
Than functional module (33).
LNG plant area the most according to claim 1 load governor, it is characterised in that described cryogen separatory tank (4)
In the refrigerant lines that top connects, pressure-control valve (41) is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620670943.XU CN205784228U (en) | 2016-06-29 | 2016-06-29 | LNG plant area load governor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620670943.XU CN205784228U (en) | 2016-06-29 | 2016-06-29 | LNG plant area load governor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205784228U true CN205784228U (en) | 2016-12-07 |
Family
ID=58128942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620670943.XU Active CN205784228U (en) | 2016-06-29 | 2016-06-29 | LNG plant area load governor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205784228U (en) |
-
2016
- 2016-06-29 CN CN201620670943.XU patent/CN205784228U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |