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Ejector optimization method and ejector

An optimization method and ejector technology, applied in the ejector optimization, ejector field, can solve the problems of abnormal system operation, unstable equipment operation, shutdown, etc.

Active Publication Date: 2022-07-29
山东沃德净水科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The inventors found that with the reduction of the primary flow pressure, the mass flow rate of the mixed fluid at the outlet of the injector also decreases. Changes in primary flow pressure, using traditional injectors will cause instability in the operation of subsequent equipment, and even cause system malfunction and shutdown

Method used

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  • Ejector optimization method and ejector
  • Ejector optimization method and ejector
  • Ejector optimization method and ejector

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Experimental program
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Embodiment 1

[0043] like figure 1 As shown in the figure, as the primary flow pressure decreases, the mass flow rate of the mixed fluid at the ejector outlet also decreases; for the above problems, this embodiment provides an ejector optimization method; this embodiment mainly focuses on the primary flow pressure fluctuation A calculation model that can maintain the geometric parameters of the main nozzle is proposed. The fluid mixing mechanism inside the injector is as follows: figure 2 For the convenience of description and distinction, in this implementation, the ejector model is divided into a suction section, a mixing section and a diffuser section, and the relevant control equations and solution process of the model are as follows:

[0044] like figure 2 As shown, the control equation from the injector outlet to the interface between the mixing section and the diffuser section in this embodiment is as follows:

[0045] (1)

[0046] The interface between the mixing section and...

Embodiment 2

[0081] The present embodiment provides an injector, including a main nozzle, and a mixing section of the injector includes a first cross-section close to the main nozzle, and a second cross-section away from the main nozzle;

[0082] The method of determining the throat cross-sectional area of ​​the main nozzle is as follows: according to the obtained primary flow velocity and secondary flow velocity at the first section, and the primary flow mass flow, and based on the law of conservation of momentum before and after fluid mixing at the second section, determine The cross-sectional area of ​​the main nozzle throat under different primary flow pressures when the mass flow rate of the mixed fluid is constant.

[0083] The main nozzle is a multi-ring main nozzle.

Embodiment 3

[0085] like image 3 As shown, in order to further improve and illustrate the embodiment 2, this embodiment provides an injector, including a main nozzle, the parameters of the main nozzle are obtained by the injector optimization method as described in the embodiment 1;

[0086] In Example 2, the solution equations for the geometric parameters of the main nozzle to maintain a constant mass flow rate of the ejector mixed fluid under different primary flow conditions are obtained by derivation; New injector for mixing fluid mass - dual annular main nozzle injector. Since it is necessary to use main nozzles with different cross-sectional areas to maintain a constant mass flow rate of the mixed fluid under different primary flow conditions, and considering that the injector still needs to have high ejection performance under the set conditions, it is necessary to design a An injector with different cross-sectional area main nozzles under different main nozzles. The realization ...

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Abstract

The invention belongs to the technical field of computer aided design, and provides an injector optimization method and an injector, and the method comprises the following steps: determining the throat cross-sectional area of a main nozzle under different primary flow pressures when the mass flow of mixed fluid is constant based on the momentum conservation law before and after the fluid is mixed at a second section and the mass flow of the primary flow; determining the cross sectional areas of the inlet and the outlet of the main nozzle according to the cross sectional area of the throat part of the main nozzle, the angle and the length of the divergent section of the main nozzle and the angle and the length of the convergent section of the main nozzle; according to the method, the geometric structure parameters of the main nozzle for maintaining the mass flow rate of the mixed fluid of the ejector to be constant under different primary flow working conditions can be obtained, and the problem that follow-up equipment operation is unstable due to the ejector along with the change of the primary flow pressure intensity is avoided.

Description

technical field [0001] The invention belongs to the technical field of computer-aided design, and in particular relates to an injector optimization method and an injector. Background technique [0002] The introduction of the ejector into the multi-effect distillation equipment can significantly improve the water production field, especially the water production efficiency of medical water for injection preparation and thermal seawater desalination, and greatly reduce the water production cost. [0003] The inventor found that with the decrease of the primary flow pressure, the mass flow rate of the mixed fluid at the ejector outlet also decreased, and the power steam of the multi-effect distillation equipment in the medical water for injection preparation system was derived from the mixed fluid of the ejector, so with the The change of the primary flow pressure, the use of the traditional ejector will cause the unstable operation of the subsequent equipment, and even lead t...

Claims

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Application Information

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IPC IPC(8): B05B1/00G06F30/20G06F113/08
CPCB05B1/00G06F30/20G06F2113/08
Inventor 贾磊孙文旭张海伦薛浩渊马晓静
Owner 山东沃德净水科技有限公司
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