CN109114418A - 一种带有柱塞泵的气化站 - Google Patents

一种带有柱塞泵的气化站 Download PDF

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CN109114418A
CN109114418A CN201810970349.6A CN201810970349A CN109114418A CN 109114418 A CN109114418 A CN 109114418A CN 201810970349 A CN201810970349 A CN 201810970349A CN 109114418 A CN109114418 A CN 109114418A
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storage tank
lng
plunger pump
pressure
sledge
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刁浩峰
郭慧君
何晓强
胡志强
项菊
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Jereh Oil and Gas Engineering Corp
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Jereh Oil and Gas Engineering Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00—Arrangements for supervising or controlling working operations
    • F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00—Arrangements for supervising or controlling working operations
    • F17D3/12—Arrangements for supervising or controlling working operations for injecting a composition into the line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00—Arrangements for supervising or controlling working operations
    • F17D3/18—Arrangements for supervising or controlling working operations for measuring the quantity of conveyed product
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2225/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

本发明属于天然气行业气化站技术领域，具体地涉及一种带有柱塞泵的气化站，包括槽车、储罐、空温式气化器和调压计量加臭橇，槽车和储罐的压力通过卸车增压橇平衡，使得槽车内的压力增高，LNG被输送至储罐内储存，储罐带有储罐增压器，当从储罐外排时，先通过储罐的储罐增压器增压，使储罐压力升高，然后打开储罐液相出口阀，通过压力差将储罐内的LNG送至空温式气化器后，经调压计量加臭橇送入市政燃气管网或燃气锅炉，储罐和空温式气化器之间增加一柱塞泵，柱塞泵受变频器控制，既可以满足后端用户工作压力＞0.8MPa的需求，还可以满足用气量的变化要求。

Description

一种带有柱塞泵的气化站
技术领域
本发明属于天然气行业气化站技术领域，具体地涉及一种带有柱塞泵的气化站。
背景技术
LNG气化站按照供应对象的不同可以分为单点直供气化站和LNG卫星站，用以接收、储存并气化上游采购的LNG来向当地供气。
LNG气化站的工艺流程一般为：LNG由槽车运至气化站，槽车压力与储罐压力平衡后，使槽车内压力增高，将槽车内LNG送至LNG储罐内储存。当从LNG储罐外排时，先通过储罐的自增压系统，使储罐压力升高，然后打开储罐液相出口阀，通过压力差将储罐内的LNG送至气化器后，经调压、计量、加臭等工序送入市政燃气管网或燃气锅炉。
现有的气化站工艺流程技术只能实现工作压力P≤0.8MPa的后端用户需求，而对于用户需求工作压力P＞0.8MPa的天然气则无法实现。
发明内容
本发明为了克服上述技术问题的不足，提供了一种带有柱塞泵的气化站，可以完全解决上述技术问题。
解决上述技术问题的技术方案如下：
一种带有柱塞泵的气化站，其工艺流程包括LNG槽车、LNG储罐、空温式气化器和调压计量加臭橇，所述的LNG槽车和LNG储罐的压力通过卸车增压橇平衡，使得LNG槽车内的压力增高，LNG被输送至LNG储罐内储存，LNG储罐带有储罐增压器，当从LNG储罐外排时，先通过LNG储罐的储罐增压器增压，使LNG储罐压力升高，然后打开LNG储罐液相出口阀，通过压力差将LNG储罐内的LNG送至空温式气化器后，经调压计量加臭橇送入市政燃气管网或燃气锅炉，所述的LNG储罐和空温式气化器之间增加一柱塞泵，所述的柱塞泵受变频器控制。
进一步地说，所述的调压计量加臭橇的前端设置有水浴加热器，水浴加热器的入口端与空温式气化器的出口端连接。
进一步地说，所述的柱塞泵给气化站提供气源。
进一步地说，经过柱塞泵增压的气化站的LNG可以达到工作压力＞0.8MPa。
本发明的有益效果是：
本发明提供了一种带有柱塞泵的气化站，采用柱塞泵对气化站提供气源，可以满足后端用户工作压力＞0.8MPa的需求。柱塞泵采用变频控制，当后端用户用气量改变时，通过调整变频器的频率改变柱塞泵的转速，从而满足用气量的变化要求。LNG低温储罐的液体经过柱塞泵增压后，再经空温式气化器一次升温，水浴加热器二次升温，调压计量加臭橇调压、计量、加臭作用，实现了用户需求工作压力P＞0.8MPa的天然气。
附图说明
下面结合附图和具体实施方式对本发明作进一步详细的说明。
图1为本发明的工艺流程示意图；
图中：1为LNG槽车，2为卸车增压橇，3为LNG储罐，4为储罐增压器，5为柱塞泵，6为空温式气化器，7为水浴加热器，8为调压计量加臭橇。
具体实施方式
实施例1：
如图1所示，一种带有柱塞泵的气化站，包括LNG槽车1、LNG储罐3、空温式气化器6和调压计量加臭橇8，LNG槽车1和LNG储罐3的压力通过卸车增压橇2平衡，使得LNG槽车1内的压力增高，LNG被输送至LNG储罐3内储存，LNG储罐3带有储罐增压器4，当从LNG储罐3外排时，先通过LNG储罐3的储罐增压器4增压，使LNG储罐3压力升高，然后打开LNG储罐3液相出口阀，通过压力差将LNG储罐3内的LNG送至空温式气化器6后，经调压计量加臭橇8送入市政燃气管网或燃气锅炉，LNG储罐3和空温式气化器6之间增加一柱塞泵5，柱塞泵5受变频器控制。调压计量加臭橇8的前端设置有水浴加热器7，水浴加热器7的入口端与空温式气化器6的出口端连接。柱塞泵5给气化站提供气源。经过柱塞泵5增压的气化站的LNG可以达到工作压力＞0.8MPa。
进一步地说，卸车增压橇2对LNG槽车1增压至0.6MPa，然后通过压力差将LNG槽车1内的LNG送到LNG储罐3中储存，LNG储罐3经过储罐增压器4增压，从而使LNG储罐3中的LNG压力满足柱塞泵5的需求，柱塞泵5的进口压力0.3MPa，LNG储罐3中的LNG经过柱塞泵5增压，从而使柱塞泵5出口LNG压力满足后端用户需求(P＞0.8MPa)，经过柱塞泵5增压的LNG再由空温式气化器6一次升温，水浴加热器7二次升温至0℃以上，调压计量加臭橇8调压、计量、加臭作用，输送到市政燃气管网或燃气锅炉。通过柱塞泵增压的方式提高了LNG低温储罐中的LNG工作压力，再经气化、调压、计量、加臭作用，实现了用户需求工作压力P＞0.8MPa的天然气。此外，柱塞泵采用变频控制，当后端用户用气量改变时，通过调整变频器的频率改变柱塞泵的转速，从而满足用气量的变化要求。
以上所述，仅是本发明的较佳实施例，并非对本发明做任何形式上的限制，未尽事宜，均为本领域常规技术手段实现，凡是依据本发明的技术实质上对以上实施例所作的任何简单修改、等同变化，均落入本发明的保护范围之内。

Claims (4)

1.一种带有柱塞泵的气化站，其工艺流程包括LNG槽车、LNG储罐、空温式气化器和调压计量加臭橇，所述的LNG槽车和LNG储罐的压力通过卸车增压橇平衡，使得LNG槽车内的压力增高，LNG被输送至LNG储罐内储存，LNG储罐带有储罐增压器，当从LNG储罐外排时，先通过LNG储罐的储罐增压器增压，使LNG储罐压力升高，然后打开LNG储罐液相出口阀，通过压力差将LNG储罐内的LNG送至空温式气化器后，经调压计量加臭橇送入市政燃气管网或燃气锅炉，其特征在于，所述的LNG储罐和空温式气化器之间增加一柱塞泵，所述的柱塞泵受变频器控制。
2.根据权利要求1所述的带有柱塞泵的气化站，其特征在于，所述的调压计量加臭橇的前端设置有水浴加热器，水浴加热器的入口端与空温式气化器的出口端连接。
3.根据权利要求1所述的带有柱塞泵的气化站，其特征在于，所述的柱塞泵给气化站提供气源。
4.根据权利要求1所述的带有柱塞泵的气化站，其特征在于，经过柱塞泵增压的气化站的LNG可以达到工作压力＞0.8MPa。
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