Evaporator Ⅰ juice vapor recycling system

Abstract

The application relates to the sugar manufacturing technical field and discloses an evaporation I-effect juice vapor recycling system, which comprises a jet valve, a mixing body and a pressure booster. A working nozzle is arranged at the outlet position of the jet valve, a mixing chamber is arranged at the nozzle spout position of the working nozzle, a throat pipe is connected to the outlet position of the mixing chamber, and an expansion pipe is connected to the outlet position of the throat pipe. The working nozzle is sequentially connected to the mixing chamber, the throat pipe and the expansion pipe. The working nozzle is a zoom nozzle structure. The jet valve, the mixing body and the pressure booster are connected through pipelines. The evaporation I-effect juice vapor recycling system adopts the zoom nozzle structure of the working nozzle, can make the juice vapor obtain supersonic flow when being sprayed, fully mixes the working steam and the sucked gas, reduces the sudden compression loss and the loss of residual velocity kinetic energy, prevents steam backflow, and guarantees the operation safety of the steam turbine set.

Description

Technical Field

[0001] This application relates to the field of sugar production technology, specifically to an evaporation efficiency I juice vapor recycling system. Background Technology

[0002] Currently, the sugar factory's evaporation system uses a series steam method. The material is evaporated from the first to the fifth effect, and the heating steam is also heated one by one from the first to the fifth effect in series. The pressure and temperature gradually decrease. The last tank of the fifth effect uses a jet condenser to extract the steam. However, the amount of steam extracted from the fifth effect is about 4% to 7% of the steam compared to the sugarcane, resulting in a relatively large heat loss. In recent years, with the improvement of technology and equipment, the "Automatic Control Steam Balance Heating System" (National Patent: ZL201520003552.8) has been widely used in sugar mills for heating the juice steam in the second and third effects of evaporation. It utilizes the heat loss during the desuperheating of turbine exhaust steam to transfer heat to the juice steam in each evaporation effect that needs temperature enhancement. This allows a large amount of the heated juice steam in the second and third effects of evaporation to be extracted, reducing the amount of juice extracted from the first effect of evaporation. This results in faster and more concentrated sugarcane juice concentration, a significant reduction in steam consumption in the evaporation system, and significant energy savings. However, due to the imbalance between steam and electricity in the cogeneration configuration of sugar mills, the steam used for sugar production, in addition to the exhaust steam from the turbine unit, also needs to be supplemented with boiler live steam (after pressure reduction and desuperheating). Due to changes in the amount and intensity of the evaporated material, the steam consumption of the first effect of the evaporation system also changes continuously. Furthermore, the power generation of the turbine unit also changes continuously, leading to variations in the amount of boiler live steam required for supplementation. Therefore, a stable juice steam recycling system for the first effect of evaporation is needed to address the problem of increased boiler supplementary steam. Utility Model Content

[0003] To address the shortcomings of existing technologies, this application provides an evaporation efficiency I steam recycling system, which has the advantages of energy saving and consumption reduction, and solves the problem of reducing boiler supplementary steam.

[0004] To achieve the above objectives, this application provides the following technical solution: an evaporation efficiency I juice vapor recycling system, comprising an injection valve, a mixing body, and a booster body. The outlet position of the injection valve is equipped with a working nozzle, a mixing chamber installed at the nozzle orifice position of the working nozzle, a throat pipe connected to the outlet position of the mixing chamber, and a diffuser pipe connected to the outlet position of the throat pipe. The working nozzle is sequentially connected to the mixing chamber, the throat pipe, and the diffuser pipe. The working nozzle has a zoom nozzle structure.

[0005] The working nozzle adopts a scaling nozzle structure, which can make the steam achieve supersonic steam flow when it is ejected, thereby ensuring that the working steam and the gas being pumped are fully mixed, reducing the loss of sudden compression and residual kinetic energy, and preventing steam backflow, thus ensuring the safe operation of the turbine unit.

[0006] Preferably, the injection valve, the mixing body, and the pressure booster are connected by a pipeline.

[0007] Preferably, the vapor ejected from the working nozzle and the extracted gas are mixed inside the mixing chamber, and the extracted gas enters the outlet portion of the injection valve from the bottom pipe of the working nozzle.

[0008] In summary, this application includes at least one of the following beneficial effects:

[0009] 1. The evaporation efficiency I gas recycling system adopts a scaling nozzle structure for its working nozzle, which can obtain supersonic steam flow when the gas is ejected, thereby ensuring that the working steam and the gas being drawn are fully mixed, reducing sudden compression loss and residual kinetic energy loss, and preventing steam backflow, thus ensuring the safe operation of the turbine unit.

[0010] 2. This evaporation efficiency I juice-vapor recycling system adopts a linear electric actuator. The electric actuator can be manually or electrically adjusted and switched between each other, so that the outlet pressure of the mixing section can be manually or automatically adjusted according to user needs, which is convenient to use. Attached Figure Description

[0011] Figure 1 This is a structural diagram of the evaporation efficiency I juice vapor recycling system of this application;

[0012] Figure 2 This is a flowchart of the evaporation efficiency I juice vapor recycling system of this application.

[0013] The components are: 1. Working nozzle; 2. Mixing chamber; 3. Throat; 4. Diffuser tube. Detailed Implementation

[0014] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0015] Please see Figure 1-2 The vapor recycling system includes an injection valve, a mixing body, and a booster. A working nozzle 1 is installed at the outlet of the injection valve, a mixing chamber 2 is installed at the nozzle of the working nozzle 1, a throat 3 is connected to the outlet of the mixing chamber 2, and a diffuser 4 is connected to the outlet of the throat 3. The working nozzle 1 is connected to the mixing chamber 2, the throat 3, and the diffuser 4 in sequence. The working nozzle 1 has a zoom nozzle structure. The injection valve, the mixing body, and the booster are connected by pipes. The vapor ejected from the working nozzle 1 and the extracted gas are mixed inside the mixing chamber 2. The extracted gas enters the outlet part of the injection valve from the bottom pipe of the working nozzle 1.

[0016] The converging nozzle structure includes a gradually widening inlet section and a gradually narrowing outlet section, designed to improve gas flow efficiency and injection effect. Based on the Laval nozzle principle, the converging nozzle uses a rational contraction and expansion structure to allow the gas to undergo a process from high pressure to low pressure inside the nozzle, thereby achieving higher injection speeds and better airflow control.

[0017] A throat 3 with a constant cross-section is provided between the working nozzle 1 and the diffuser 4. Its function is to fully mix the working steam and the gas being pumped, so as to reduce the loss of sudden compression and residual kinetic energy.

[0018] In operation, the evaporation efficiency I steam recycling system mainly consists of an injection valve, a mixing body, and a pressure booster. The steam generated by the boiler, with a pressure of 3.82 or 2.45 MPa and a temperature of 450 or 380°C, expands adiabatically after passing through the nozzle. The nozzle outlet pressure is lower than the low-pressure steam pressure. Due to the pressure difference, the injected evaporation efficiency I steam, with a pressure of approximately 0.1 MPa and a temperature of approximately 108°C, is drawn to the injection valve. The two steam streams mix in the mixing body and are pressurized by the pressure booster to a pressure greater than or equal to the turbine exhaust steam pressure of approximately 0.25~0.3 MPa and a temperature of approximately 320°C. The steam is then sent to the front end of the desuperheater, where it mixes with the turbine exhaust steam and enters the desuperheater for de-temperature treatment before being supplied as steam for the sugar refining process. This system can achieve a high-pressure steam output of 1 t / h and can inject 0.7~1.0 t / h of low-pressure steam, which can reduce the amount of boiler live steam required for replenishment.

[0019] P2 represents the return and re-drawing of low-pressure first-effect steam to the steam ejector mixing system. After mixing, pressurizing and heating in the steam ejector mixing system, high-quality steam with increased pressure and temperature (P3) is obtained from the outlet and then replenished to the bottom of the first-effect evaporator via the pipeline desuperheater.

[0020] The system's ejection section includes a working nozzle 1, a mixing chamber 2, a throat 3, and a diffuser 4. The working nozzle 1 adopts a telescoping nozzle structure, which can obtain supersonic steam flow at its outlet. Its function is to fully mix the working steam and the extracted gas to reduce sudden compression loss and residual kinetic energy loss, and to prevent steam backflow, thus ensuring the safe operation of the turbine unit.

[0021] This system uses a linear electric actuator, which can be manually or electrically adjusted to switch between the two, so that the outlet pressure of the mixed section can be manually or automatically adjusted according to user needs.

[0022] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An evaporation efficiency I vapor recycling system, comprising an injection valve, a mixing body, and a pressure booster, characterized in that: The outlet of the injection valve is equipped with a working nozzle (1), a mixing chamber (2) installed at the nozzle position of the working nozzle (1), a throat (3) connected to the outlet position of the mixing chamber (2), and a diffuser (4) connected to the outlet position of the throat (3). The working nozzle (1) is connected to the mixing chamber (2), the throat (3), and the diffuser (4) in sequence. The working nozzle (1) is a zoom nozzle structure.

2. The evaporation efficiency I vapor recycling system according to claim 1, characterized in that: The injection valve, the mixing body, and the booster body are connected by a pipeline.

3. The evaporation efficiency I vapor recycling system according to claim 1, characterized in that: The vapor ejected from the working nozzle (1) and the extracted gas are mixed inside the mixing chamber (2), and the extracted gas enters the outlet part of the injection valve from the bottom pipe of the working nozzle (1).

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