阅读说明：本技术 蒸汽管网节点等干度分配和支线流量测量方法及装置 (Method and device for equal dryness distribution and branch flow measurement of steam pipe network nodes ) 是由 卢玖庆 王良贵 何峰 何宇 于 2020-04-27 设计创作，主要内容包括：本发明公开了蒸汽管网节点等干度分配和支线流量测量方法及装置,属于流量计量领域,目的在于提供一种蒸汽管网节点等干度分配和支线流量测量方法及装置,提高各注汽井蒸汽计量精度和干度测量精度,同时在线检测各支线段保温效果状况。其包括连接在锅炉上的主输汽管线,主输汽管线上安装有锅炉出口总蒸汽流量计,锅炉出口总蒸汽流量计电连接有总流量计算机,主输汽管线上位于锅炉出口总蒸汽流量计后方安装有若干等干度分配装置,等干度分配装置连通有支线输汽管线,支线输汽管线连通有井口,支线输汽管线上还安装有井口蒸汽流量计。本发明适用于蒸汽管网节点等干度分配和支线流量测量方法及装置。(The invention discloses a method and a device for equal-dryness distribution and branch flow measurement of steam pipe network nodes, belongs to the field of flow measurement, and aims to provide a method and a device for equal-dryness distribution and branch flow measurement of steam pipe network nodes, improve the steam measurement precision and the dryness measurement precision of each steam injection well, and simultaneously detect the heat preservation effect condition of each branch section on line. The boiler comprises a main steam transmission pipeline connected to a boiler, wherein a boiler outlet total steam flow meter is installed on the main steam transmission pipeline and is electrically connected with a total flow computer, a plurality of equal-dryness distribution devices are installed on the main steam transmission pipeline behind the boiler outlet total steam flow meter and are communicated with a branch steam transmission pipeline, the branch steam transmission pipeline is communicated with a well head, and a well head steam flow meter is also installed on the branch steam transmission pipeline. The method and the device are suitable for equal dryness distribution of steam pipe network nodes and branch line flow measurement.)

1. The method for equal dryness distribution and branch flow measurement of steam pipe network nodes is characterized in that an equal dryness distribution device is arranged from a steam boiler to each steam injection well head pipeline node, a steam flow differential pressure value is measured by a throttling differential pressure device at the inlet end of an equal dryness distributor in the equal dryness distribution device, a steam temperature value is measured by a temperature sensor, the steam dryness and the steam density of a main steam transmission pipeline and a branch steam transmission pipeline distributed to two outlet ends of the equal dryness distributor are equal by a Bernoulli equation according to the mass flow measured by a total steam flow meter at the outlet of the boiler according to the flow continuous theorem and the mass conservation theorem, the respective differential pressure value is measured by the throttling devices on the main steam transmission pipeline and the branch steam transmission pipeline respectively, and according to the calculated steam working condition density, the Bernoulli equation is used for respectively calculating the steam mass flow of the main steam transmission pipeline and the branch steam transmission pipeline through the total flow computer, and the heat losses of the main steam transmission pipeline and the branch steam transmission pipeline are calculated and displayed through the temperature sensor and the total flow computer.

2. Steam pipe network node quality distribution and branch flow measuring device, a serial communication port, including main steam transmission pipeline (4) of connection on boiler (1), install boiler export total steam flow meter (2) on main steam transmission pipeline (4), boiler export total steam flow meter (2) electricity is connected with total flow computer (3), lie in boiler export total steam flow meter (3) rear on main steam transmission pipeline (4) and install a plurality of quality distribution device (5) such as, quality distribution device (5) intercommunication has branch steam transmission pipeline (8), branch steam transmission pipeline (8) intercommunication has well head (7), still install well head steam flow meter (12) on branch steam transmission pipeline (8).

3. The steam pipe network node equal-dryness distribution and branch flow measurement device according to claim 2, characterized in that the equal-dryness distribution device (5) comprises an equal-dryness distributor (10) communicated with the main steam transmission pipeline (4) and the branch steam transmission pipeline (8), the equal-dryness distributor (10) is electrically connected with a node data wireless controller (11), one sides of the main steam transmission pipeline (4) and the branch steam transmission pipeline (8) close to the equal-dryness distributor (10) are respectively provided with a throttling differential pressure device (6), the main steam transmission pipeline (4) at the inlet end of the equal-dryness distributor (10) is provided with a temperature sensor (9) between the equal-dryness distributor (10) and the throttling differential pressure device (6), and the temperature sensor (9) and the throttling differential pressure device (6) are both electrically connected with the node data wireless controller (11).

4. The steam pipe network node equal quality distribution and branch line flow measurement device according to claim 2, characterized in that the node data wireless controller (11) is connected with the wellhead steam flow meter (12) through wireless signals.

5. The equal-quality distribution and branch flow measurement device for steam pipe network nodes according to claim 3, characterized in that the total flow computer (3) is in wireless signal connection with the node data wireless controller (11).

Technical Field

The invention belongs to the field of flow measurement, and particularly relates to a method and a device for equal dryness distribution and branch flow measurement of a thick oil thermal recovery steam pipe network node.

Background

In the thermal field, some fluid metering is complex, and special multiphase flow measurement is more difficult. For example, the measurement of the steam flow and dryness in heavy oil thermal recovery is still a difficult problem in domestic and overseas research and application. The metering of steam for thick oil thermal recovery is very complicated, the existing thick oil thermal recovery steam boiler comprises a wet steam boiler and an overheated steam boiler, the steam from the outlet of the overheated steam boiler to a plurality of steam injection well heads changes in steam property due to the complex reasons of distance, overheating degree, heat preservation effect reduction year by year and the like, and part of well head steam is changed into wet steam from overheated steam. The wet steam metering belongs to the multiphase flow metering category, and compared with single-phase flow, the complicated and variable multiphase flow metering can be reduced by 30-40% only by the measuring range, so that the steam metering precision and the dryness measuring precision can not meet the production requirement.

Disclosure of Invention

The invention aims to: the method and the device for equal dryness distribution of steam pipe network nodes and branch line flow measurement are provided, the steam metering precision and the dryness measurement precision of each steam injection well are improved, and meanwhile, the heat preservation effect condition of each branch line section is detected on line.

The technical scheme adopted by the invention is as follows:

a method for measuring the flow rate of branch steam and the equal-dryness distribution of steam pipe network nodes includes such steps as installing equal-dryness distributor to the nodes between steam boiler and each steam-injection well, measuring the differential pressure of steam by the steam flowmeter at the inlet of the equal-dryness distributor in said distributor, measuring the steam temperature by temp sensor, calculating the steam density of main and branch steam pipelines according to the mass flow measured by the total steam flowmeter at outlet of boiler, calculating the pressure difference between the pressure difference measured by the node steam flowmeters on main and branch steam pipelines, calculating the steam density of branch steam pipelines, the steam mass flow of the main steam transmission pipeline and the branch steam transmission pipeline are respectively calculated by the total flow computer, and the heat losses of the main steam transmission pipeline and the branch steam transmission pipeline are calculated and displayed by the total flow computer through the temperature sensor.

The equal-dryness distribution and branch flow measurement device for the steam pipe network nodes comprises a main steam transmission pipeline connected to a boiler, wherein a boiler outlet total steam flow meter is installed on the main steam transmission pipeline, the boiler outlet total steam flow meter is electrically connected with a total flow computer, a plurality of equal-dryness distribution devices are installed on the main steam transmission pipeline behind the boiler outlet total steam flow meter, the equal-dryness distribution devices are communicated with branch steam transmission pipelines, the branch steam transmission pipelines are communicated with a well mouth, and well mouth steam flow meters are further installed on the branch steam transmission pipelines.

Furthermore, the equal-dryness distributor comprises an equal-dryness distributor communicated with a main steam transmission pipeline and a branch steam transmission pipeline, the equal-dryness distributor is electrically connected with a node data wireless controller, node steam flow meters are installed on one sides, close to the equal-dryness distributor, of the main steam transmission pipeline and the branch steam transmission pipeline, a temperature sensor is installed between the equal-dryness distributor and the node steam flow meters on the main steam transmission pipeline at the inlet end of the equal-dryness distributor, and the temperature sensor and the node steam flow meters are electrically connected with the node data wireless controller.

Further, the total flow computer is connected with the wellhead steam flowmeter through wireless signals.

Further, the total flow computer is in wireless signal connection with the node data wireless controller.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. the system comprises a main steam transmission pipeline connected to a boiler, wherein a boiler outlet total steam flow meter is arranged on the main steam transmission pipeline and is electrically connected with a total flow computer, a plurality of equal-dryness distribution devices are arranged on the main steam transmission pipeline behind the boiler outlet total steam flow meter and are communicated with a branch steam transmission pipeline, the branch steam transmission pipeline is communicated with a well head, and a well head steam flow meter is also arranged on the branch steam transmission pipeline. The equal-dryness distributor comprises an equal-dryness distributor communicated with a main steam transmission pipeline and a branch steam transmission pipeline, the equal-dryness distributor is electrically connected with a node data wireless controller, node steam flow meters are installed on one sides, close to the equal-dryness distributor, of the main steam transmission pipeline and the branch steam transmission pipeline, a temperature sensor is installed between the equal-dryness distributor and the node steam flow meters on the main steam transmission pipeline at the inlet end of the equal-dryness distributor, and the temperature sensor and the node steam flow meters are electrically connected with the node data wireless controller. And the total flow computer is connected with the wellhead steam flowmeter through a wireless signal. And the total flow computer is in wireless signal connection with the node data wireless controller.

By the arrangement, a steam differential pressure value is measured by a throttling differential pressure device at the inlet end of the equal-dryness distributor, a steam temperature value is measured by a temperature sensor, a steam working condition density is calculated by a total flow computer according to the mass flow measured by a total steam flow meter at the outlet of the boiler by a flow continuous theorem and a mass conservation theorem, the steam dryness and the steam density of a main steam transmission pipeline and a branch steam transmission pipeline distributed at the outlet end of the equal-dryness distributor are ensured to be equal by the equal-dryness distributor, the respective differential pressure values are measured by throttling differential pressure devices on the main steam transmission pipeline and the branch steam transmission pipeline respectively, the steam mass flow of the main steam transmission pipeline and the branch steam transmission pipeline is calculated by the total flow computer according to the calculated steam working condition density by the Bernoulli equation, and the heat loss of the main steam transmission pipeline and the branch steam transmission pipeline is calculated and displayed by the total flow computer by the temperature sensor, the steam metering precision and the dryness measuring precision of each steam injection well are improved, and meanwhile, the heat preservation effect condition of each branch line section is detected on line.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of an equal dryness fraction dispensing device according to the present invention;

FIG. 3 is a top view of the equal dryness dispensing apparatus of the present invention;

the labels in the figure are: the system comprises a boiler 1, a boiler 2, a boiler outlet total steam flow meter, a total flow computer 3, a main steam transmission pipeline 4, an equal dryness fraction distribution device 5, a throttling differential pressure device 6, a wellhead 7, a branch steam transmission pipeline 8, a temperature sensor 9, an equal dryness fraction distributor 10, a node 11, a data wireless controller 12 and a wellhead steam flow meter 12.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

A method for measuring the flow rate of branch steam and the equal-dryness distribution of steam pipe network nodes includes such steps as installing equal-dryness distributors to the nodes of steam injection well head pipelines from steam boiler, measuring the differential pressure of steam by the steam flowmeter at the inlet of the equal-dryness distributors, measuring the steam temperature by temp sensor, measuring the mass flow rate by the steam flow continuity theorem and mass conservation theorem, calculating the steam density by Bernoulli equation according to the mass flow rate measured by the total steam flowmeter at the outlet of boiler, measuring the differential pressure by the node steam flowmeters on the main steam pipeline and branch steam pipeline, calculating the steam mass flow rate of main steam pipeline and branch steam pipeline by Bernoulli equation, meanwhile, the heat losses of the main steam transmission pipeline and the branch steam transmission pipelines are calculated and displayed by a total flow computer through a temperature sensor.

The equal-dryness distribution and branch flow measurement device for the thickened oil pipe network nodes comprises a main steam transmission pipeline connected to a boiler, wherein a boiler outlet total steam flow meter is installed on the main steam transmission pipeline, the boiler outlet total steam flow meter is electrically connected with a total flow computer, a plurality of equal-dryness distribution devices are installed on the main steam transmission pipeline behind the boiler outlet total steam flow meter, the equal-dryness distribution devices are communicated with branch steam transmission pipelines, the branch steam transmission pipelines are communicated with a well mouth, and well mouth steam flow meters are further installed on the branch steam transmission pipelines.

Furthermore, the equal-dryness distributor comprises an equal-dryness distributor communicated with a main steam transmission pipeline and a branch steam transmission pipeline, the equal-dryness distributor is electrically connected with a node data wireless controller, node steam flow meters are installed on one sides, close to the equal-dryness distributor, of the main steam transmission pipeline and the branch steam transmission pipeline, a temperature sensor is installed between the equal-dryness distributor and the node steam flow meters on the main steam transmission pipeline at the inlet end of the equal-dryness distributor, and the temperature sensor and the node data wireless controller are electrically connected with the node data wireless controller.

Further, the total flow computer is connected with the wellhead steam flowmeter through wireless signals.

Further, the total flow computer is in wireless signal connection with the node data wireless controller.

The equal dryness distributor is not limited to any type and structure, and any equal dryness distributor capable of ensuring that the steam dryness and the steam density of the downstream main steam transmission pipeline and the downstream branch steam transmission pipeline are equal is suitable for the equal dryness distributor.

In the implementation process of the invention, a steam differential pressure value is measured by a node steam flow meter at the inlet end of an equal-dryness distributor, a steam temperature value is measured by a temperature sensor, a steam working condition density is calculated by a Bernoulli equation according to the mass flow measured by a total steam flow meter at the outlet end of a boiler according to a flow continuous theorem and a mass conservation theorem, then the steam dryness and the steam density of a main steam transmission pipeline and a branch steam transmission pipeline distributed at the outlet end of the equal-dryness distributor are ensured to be equal by the equal-dryness distributor, the respective differential pressure values are respectively measured by the node steam flow meters on the main steam transmission pipeline and the branch steam transmission pipeline, the steam mass flow of the main steam transmission pipeline and the branch steam transmission pipeline are respectively calculated by the Bernoulli equation according to the calculated steam working condition density, and the heat loss of the main steam transmission pipeline and the branch steam transmission pipeline is simultaneously calculated by the total flow computer through the temperature sensor and displayed, the steam metering precision and the dryness measuring precision of each steam injection well are improved, and meanwhile, the heat preservation effect condition of each branch line section is detected on line.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.