阅读说明：本技术 水蒸气压缩机、控制方法、蒸发浓缩系统及水蒸气离心机组 (Steam compressor, control method, evaporation concentration system and steam centrifugal unit ) 是由 陈玉辉 叶文腾 钟瑞兴 廖粤辉 于 2021-08-17 设计创作，主要内容包括：本发明公开一种水蒸气压缩机、控制方法、蒸发浓缩系统及水蒸气离心机组。其中,该水蒸气压缩机包括与水蒸气储存设备依次连通的一级进气管道、一级叶轮、一级排气管道、二级进气管道、二级叶轮、二级排气管道,该水蒸气压缩机还包括：雾化装置,设置在所述二级进气管道和所述二级叶轮之间的管路上,用于向所述二级进气管道和所述二级叶轮之间的管路喷入雾化水珠,以降低进入所述二级叶轮的水蒸气的温度。通过本发明,能够提高蒸汽机组的可靠性,延长蒸汽机组的使用寿命。(The invention discloses a steam compressor, a control method, an evaporation concentration system and a steam centrifugal unit. Wherein, this vapor compressor includes the one-level admission line, one-level impeller, one-level exhaust duct, second grade admission line, second grade impeller, the second grade exhaust duct that communicate in proper order with vapor storage equipment, and this vapor compressor still includes: and the atomizing device is arranged on a pipeline between the secondary air inlet pipeline and the secondary impeller and used for spraying atomized water drops into the pipeline between the secondary air inlet pipeline and the secondary impeller so as to reduce the temperature of the water vapor entering the secondary impeller. The invention can improve the reliability of the steam unit and prolong the service life of the steam unit.)

1. The utility model provides a vapor compressor, includes one-level admission line, one-level impeller, one-level exhaust duct, second grade admission line, second grade impeller, second grade exhaust duct that communicate in proper order with vapor storage equipment, its characterized in that, vapor compressor still includes:

and the atomizing device is arranged on a pipeline between the secondary air inlet pipeline and the secondary impeller and used for spraying atomized water drops into the pipeline between the secondary air inlet pipeline and the secondary impeller so as to reduce the temperature of the water vapor entering the secondary impeller.

2. The water vapor compressor as recited in claim 1, further comprising:

the inlet end of the water vapor cooling device is communicated with the water vapor storage equipment, and the outlet end of the water vapor cooling device is communicated with the water pump;

the water pump is communicated with the atomizing device and used for driving the water vapor cooled by the water vapor cooling device to the atomizing device.

3. A water vapor compressor as claimed in claim 1 wherein said atomizing means is an ultrasonic atomizer.

4. The water vapor compressor as recited in claim 1, further comprising:

the temperature sensor is arranged in the secondary exhaust pipeline and used for collecting the exhaust temperature of the secondary exhaust pipeline;

and the first end of the controller is connected with the temperature sensor, and the second end of the controller is connected with the atomizing device and is used for acquiring the exhaust temperature and controlling the atomized water droplet ejection quantity of the atomizing device according to the exhaust temperature.

5. The water vapor compressor as recited in claim 4, wherein said controller comprises:

the signal collector is connected with the temperature sensor and is used for obtaining the exhaust temperature;

the temperature difference calculator is used for calculating the temperature difference between the exhaust temperature and the rated exhaust temperature;

the signal generator is used for generating a first control signal to control the increase of the atomized water droplet ejection quantity of the atomization device when the temperature difference is larger than a first threshold value; when the temperature difference is smaller than or equal to the first threshold and larger than or equal to a second threshold, generating a second control signal to control the atomized water droplet ejection quantity of the atomization device to be kept unchanged; and when the temperature difference is smaller than the second threshold value, generating a third control signal to control the atomized water droplet ejection quantity of the atomization device to be reduced.

6. The water vapor compressor as recited in claim 5, wherein said controller further comprises:

and the processor is used for adjusting the time interval for acquiring the exhaust temperature according to the deviation of the exhaust temperature acquired at two adjacent times.

7. The water vapor compressor as recited in claim 6, wherein the processor is specifically configured to:

when the deviation is larger than a first preset value, prolonging the time interval;

when the deviation is smaller than or equal to the first preset value and larger than or equal to a second preset value, keeping the time interval unchanged;

and when the deviation is smaller than the second preset value, shortening the time interval.

8. An evaporative concentration system comprising the water vapor compressor of any one of claims 1 to 7.

9. A steam centrifuge group comprising a steam compressor according to any of claims 1 to 7.

10. A control method applied to the water vapor compressor according to any one of claims 1 to 7, characterized by comprising:

acquiring the exhaust temperature of a secondary exhaust pipeline in the water vapor compressor;

adjusting the spray amount of atomized water droplets of an atomization device in the water vapor compressor according to the exhaust temperature; wherein, the atomization device is arranged on a pipeline between a secondary air inlet pipeline and a secondary impeller of the water vapor compressor.

11. The control method according to claim 10, wherein adjusting an atomized water droplet ejection amount of an atomizing device in the water vapor compressor according to the exhaust gas temperature includes:

if the temperature difference between the exhaust temperature and the rated exhaust temperature is larger than a first threshold value, controlling the atomized water droplet ejection quantity of the atomization device to increase;

if the temperature difference is smaller than or equal to the first threshold value and larger than or equal to a second threshold value, controlling the atomized water droplet ejection quantity of the atomization device to be kept unchanged;

and if the temperature difference is smaller than the second threshold value, controlling the atomized water droplet ejection quantity of the atomization device to be reduced.

12. The control method according to claim 10, characterized by further comprising:

and adjusting the time interval for acquiring the exhaust temperature according to the deviation of the exhaust temperature of the secondary exhaust pipeline in the water vapor compressor acquired twice.

13. The control method according to claim 12, wherein adjusting the time interval for acquiring the discharge temperature according to the deviation of the discharge temperature of the secondary discharge pipe in the water vapor compressor acquired in two adjacent times comprises:

if the deviation is greater than a first preset value, the time interval is prolonged;

if the deviation is less than or equal to the first preset value and greater than or equal to a second preset value, keeping the time interval unchanged;

if the deviation is smaller than the second preset value, the time interval is shortened.

14. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of claims 10 to 13.

Technical Field

The invention relates to the technical field of units, in particular to a steam compressor, a control method, an evaporation concentration system and a steam centrifugal unit.

Background

Steam is a source of industrial power, except for power generation by high-temperature and high-pressure steam in a power plant, the steam is mostly used in an evaporation and concentration system, and evaporation and concentration are a common link in the industry and are widely applied to various industrial productions such as food, pharmacy, chlor-alkali, seawater desalination, sewage treatment and the like. In evaporative concentration systems, a steam compressor is often used which functions to pressurize and raise the temperature of low pressure or low temperature steam to achieve the temperature and pressure requirements required for the process or project.

Fig. 1 is a structural diagram of a conventional centrifugal water vapor compressor, which is a centrifugal water vapor compressor with two-stage compression, and is a high-speed and high-pressure ratio centrifugal water vapor compressor. The working principle is that the speed and the pressure of steam are improved through the high-speed rotation of the first-stage impeller, then the speed energy of the steam is converted into pressure energy through the first-stage diffuser, the pressure of the steam is improved, and high-pressure steam enters the second-stage impeller and the second-stage diffuser in sequence through the connecting pipeline, so that the pressure energy of the steam is further improved. It can be seen that the impeller is the "heart" of the centrifugal water vapor compressor, and the reliability of the impeller directly affects the operational reliability of the steam-train system. Because the centrifugal water vapor compressor has the characteristics of high pressure ratio and high exhaust temperature, the gas sucked by the secondary impeller is high-temperature water vapor after primary compression, so that the service lives of blades of the secondary impeller and an impeller shell are remarkably shortened, the reliability is reduced, the service life of a steam unit is shortened, and the reliability of the steam unit is reduced.

Aiming at the problems that the reliability of a secondary impeller is reduced and the service life is shortened due to the overhigh temperature of the steam flowing into the secondary impeller of a double-stage steam compressor in the prior art, an effective solution is not provided at present.

Disclosure of Invention

The embodiment of the invention provides a steam compressor, a control method, an evaporation concentration system and a steam centrifugal unit, and aims to solve the problems that in the prior art, the reliability of a secondary impeller is reduced and the service life of the secondary impeller is shortened due to overhigh temperature of steam flowing into the secondary impeller of a two-stage steam compressor.

In order to solve the above technical problem, the present invention provides a water vapor compressor, wherein the water vapor compressor comprises: vapor compressor includes one-level admission line, one-level impeller, one-level exhaust duct, second grade admission line, second grade impeller, the second grade exhaust duct who communicates in proper order with vapor storage equipment, still includes:

and the atomizing device is arranged on a pipeline between the secondary air inlet pipeline and the secondary impeller and used for spraying atomized water drops into the pipeline between the secondary air inlet pipeline and the secondary impeller so as to reduce the temperature of the water vapor entering the secondary impeller.

Further, the water vapor compressor further includes:

the inlet end of the water vapor cooling device is communicated with the water vapor storage equipment, and the outlet end of the water vapor cooling device is communicated with the water pump;

the water pump is communicated with the atomizing device and used for driving the water vapor cooled by the water vapor cooling device to the atomizing device.

Further, the atomization device is an ultrasonic atomizer.

Further, the water vapor compressor further includes:

the temperature sensor is arranged in the secondary exhaust pipeline and used for collecting the exhaust temperature of the secondary exhaust pipeline;

and the first end of the controller is connected with the temperature sensor, and the second end of the controller is connected with the atomizing device and is used for acquiring the exhaust temperature and controlling the atomized water droplet ejection quantity of the atomizing device according to the exhaust temperature.

Further, the controller includes:

the signal collector is connected with the temperature sensor and is used for obtaining the exhaust temperature;

the temperature difference calculator is used for calculating the temperature difference between the exhaust temperature and the rated exhaust temperature;

the signal generator is used for generating a first control signal to control the increase of the atomized water droplet ejection quantity of the atomization device when the temperature difference is larger than a first threshold value; when the temperature difference is smaller than or equal to the first threshold and larger than or equal to a second threshold, generating a second control signal to control the atomized water droplet ejection quantity of the atomization device to be kept unchanged; and when the temperature difference is smaller than the second threshold value, generating a third control signal to control the atomized water droplet ejection quantity of the atomization device to be reduced.

Further, the controller further includes:

and the processor is used for adjusting the time interval for acquiring the exhaust temperature according to the deviation of the exhaust temperature acquired at two adjacent times.

Further, the processor is specifically configured to:

when the deviation is larger than a first preset value, prolonging the time interval;

when the deviation is smaller than or equal to the first preset value and larger than or equal to a second preset value, keeping the time interval unchanged;

and when the deviation is smaller than the second preset value, shortening the time interval.

The invention also provides an evaporation concentration system which comprises the water vapor compressor.

The invention also provides a steam centrifugal unit which comprises the steam compressor.

The invention also provides a control method, which is applied to the water vapor compressor and comprises the following steps:

acquiring the exhaust temperature of a secondary exhaust pipeline in the water vapor compressor;

adjusting the spray amount of atomized water droplets of an atomization device in the water vapor compressor according to the exhaust temperature; wherein, the atomization device is arranged on a pipeline between a secondary air inlet pipeline and a secondary impeller of the water vapor compressor.

Further, adjusting the spray amount of atomized water droplets of an atomizing device in the water vapor compressor according to the exhaust temperature comprises:

if the temperature difference between the exhaust temperature and the rated exhaust temperature is larger than a first threshold value, controlling the atomized water droplet ejection quantity of the atomization device to increase;

if the temperature difference is smaller than or equal to the first threshold value and larger than or equal to a second threshold value, controlling the atomized water droplet ejection quantity of the atomization device to be kept unchanged;

and if the temperature difference is smaller than the second threshold value, controlling the atomized water droplet ejection quantity of the atomization device to be reduced.

Further, the control method further includes:

and adjusting the time interval for acquiring the exhaust temperature according to the deviation of the exhaust temperature of the secondary exhaust pipeline in the water vapor compressor acquired twice.

Further, adjusting the time interval for acquiring the exhaust temperature according to the deviation of the exhaust temperature of the secondary exhaust pipeline in the water vapor compressor acquired twice, comprises:

if the deviation is greater than a first preset value, the time interval is prolonged;

if the deviation is less than or equal to the first preset value and greater than or equal to a second preset value, keeping the time interval unchanged;

if the deviation is smaller than the second preset value, the time interval is shortened.

The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described control method.

By applying the technical scheme of the invention, atomized water droplets are sprayed into the pipeline between the secondary air inlet pipeline and the secondary impeller through the atomizing device arranged on the pipeline between the secondary air inlet pipeline and the secondary impeller, so that the temperature of the water vapor entering the secondary impeller is reduced, the overhigh temperature of the water vapor entering the secondary impeller is avoided, the reliability of the steam unit is improved, and the service life of the steam unit is prolonged.

Drawings

FIG. 1 is a block diagram of a conventional centrifugal water vapor compressor; the device comprises a casing, a first-stage volute 01, a first-stage diffuser 02, a sealing plate 03, a motor barrel 04, an axial bearing 05, a thrust disc 06, a displacement sensor 07, a bearing support 08, a radial bearing 09, a motor stator 010, a motor shaft 011, a bearing support 012, a second-stage diffuser 013, a second-stage volute 014, a second-stage impeller 015, a plug 016, a first O-shaped ring, a second O-shaped ring 018, a high-pressure air inlet 019, a first-stage impeller 020 and a second-stage air inlet 021, wherein the casing is provided with a first-stage volute, a second-stage diffuser, a radial bearing;

FIG. 2 is a schematic structural view of a water vapor compressor according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a water vapor compressor according to another embodiment of the present invention;

FIG. 4 is a block diagram of the internal structure of a controller according to an embodiment of the present invention;

fig. 5 is a flowchart of a control method according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that although the terms first, second, etc. may be used to describe the preset temperatures in embodiments of the present invention, the preset temperatures should not be limited to these terms. These terms are only used to distinguish between different preset temperatures. For example, the first threshold may also be referred to as a second threshold, and similarly, the second threshold may also be referred to as a first threshold, without departing from the scope of embodiments of the present invention.

The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.

It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.

Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Example 1

The present embodiment provides a water vapor compressor, as shown in fig. 1 mentioned above, a centrifugal water vapor compressor with two-stage compression increases the speed and pressure of steam through the high-speed rotation of a first-stage impeller, then converts the speed energy of steam into pressure energy through a first-stage diffuser, increases the pressure thereof, and further increases the pressure energy of steam through the connection pipeline, in which high-pressure steam sequentially enters a second-stage impeller. Because the centrifugal water vapor compressor has the characteristics of high pressure ratio and high exhaust temperature, the gas sucked by the secondary impeller is high-temperature water vapor after primary compression, so that the reliability of the secondary impeller is obviously reduced, and the service life of the secondary impeller is shortened.

In view of the above problems, this embodiment provides a vapor compressor capable of improving reliability and prolonging service life, fig. 2 is a schematic structural diagram of the vapor compressor according to the embodiment of the present invention, and as shown in fig. 2, the vapor compressor includes a primary air inlet duct 2, a primary impeller 020, a primary air outlet duct 4, a secondary air inlet duct 5, a secondary impeller 015, and a secondary air outlet duct 7, which are sequentially communicated with a vapor storage device 1, and further includes: atomizing device 8 sets up on the pipeline between second grade inlet duct 5 and second grade impeller 015, in order to realize the effectual mixture of atomizing drop of water and vapor, can set up atomizing device 8 in the position nearer apart from second grade inlet duct 5, atomizing device 8 spouts the atomizing drop of water to the pipeline between second grade inlet duct 5 and the second grade impeller 015, in order to reduce the entering the temperature of the vapor of second grade impeller 015.

As shown in fig. 2, the low-temperature and low-pressure water vapor in the water vapor storage device 1 enters the compressor (i.e., the water vapor compressor) through the first-stage air inlet pipe 2, first enters the first-stage impeller 020 for first-stage compression to form first-stage compressed steam, and then is discharged through the first-stage exhaust pipe 4, the first-stage exhaust pipe 4 is connected with the second-stage air inlet pipe 5 through a pipe, and the first-stage compressed steam directly enters the second-stage air inlet pipe 5 after being discharged from the first-stage exhaust pipe 4.

In order to achieve a better atomization effect, the atomization device 8 in this embodiment may be an ultrasonic atomization device, and the atomization device 8 may have a characteristic that other impurities may not be introduced. In addition, since the pressure of the water vapor in the secondary air intake duct 5 is high, it is difficult to pressurize the liquid water by the water pump to generate a sufficiently high pressure, and a pressure difference is formed between the water vapor and the liquid water to form atomized water droplets. Adopt ultrasonic atomization device 8 can overcome this problem, liquid water can form the atomizing drop of water through the shearing force and the impact force that ultrasonic vibration produced in this atomizing device 8, then spout into second grade admission line 5 through atomizer 11 in, the heat is volatilized to the atomizing drop of water absorption rapidly, the one-level compressed steam of high temperature high pressure combines to form and gets into second grade impeller 015 behind the lower mixed steam of temperature and carry out the second grade compression, form the high temperature high pressure steam of water that accords with the design requirement, finally discharge through second grade exhaust duct 7.

The vapor compressor of this embodiment sprays into the atomizing drop of water to the pipeline between second grade air inlet pipe 5 and the second grade impeller 015 through the atomizing device 8 that sets up on the pipeline between second grade air inlet pipe 5 and second grade impeller 015, in order to reduce the entering the temperature of the vapor of second grade impeller 015 avoids the temperature of the vapor that gets into second grade impeller 015 to be too high, realizes improving steam generator set's reliability, prolongs steam generator set's life.

Example 2

In this embodiment, another vapor compressor is provided, in this embodiment, the atomizing device 8 directly uses the vapor in the vapor storage apparatus 1 as the low-temperature vapor, fig. 3 is a schematic structural diagram of a vapor compressor according to another embodiment of the present invention, as shown in fig. 3, the vapor compressor further includes: the inlet end of the water vapor cooling device 9 is communicated with the water vapor storage equipment 1, and the outlet end of the water vapor cooling device is communicated with the water pump 10; the water pump 10 is communicated with the atomization device 8 and is used for driving the water vapor cooled by the water vapor cooling device 9 to the atomization device 8.

In this embodiment, the water vapor in the water vapor storage device 1 is introduced into the water vapor cooling device 9, the water vapor cooling device 9 cools and depressurizes the high-temperature water vapor, condenses the high-temperature water vapor into liquid water and stores the liquid water, the liquid water in the water vapor cooling device 9 is extracted by the water pump 10, pressurizes the liquid water, and then guides the liquid water to the atomizing device 8.

In the evaporative concentration system, the main function of the water vapor storage device 1 is to store a compression medium in the water vapor compressor and to continuously supply water vapor when the water vapor compressor is operating normally. Therefore, the steam that directly adopts among the steam storage device 1 in this embodiment carries out the atomizing after the cooling pressurization to steam to before getting into second grade impeller 015 carries out cooling, can guarantee to have sufficient water to carry out follow-up atomizing among the cooling process, has improved the reliability of system.

Since the rated design parameters of the compressor are designed, the exhaust temperature of the secondary exhaust pipeline 7 needs to meet the corresponding design parameters, therefore, the mixed steam of the secondary intake pipeline cannot be cooled excessively, and the temperature needs to be controlled within a certain range. That is to say, the temperature of the water vapor discharged from the secondary exhaust duct 7 needs to be acquired in real time, so as to adjust the amount of the atomized water droplets sprayed by the atomizing device 8, further control the air inlet temperature of the secondary impeller 015, and finally make the exhaust temperature of the secondary exhaust duct 7 meet the above requirements. Therefore, the above-described water vapor compressor further includes: a temperature sensor (not shown in the figure) provided in the secondary exhaust pipe 7 for acquiring an exhaust temperature of the secondary exhaust pipe 7; and a controller (not shown in the figure), a first end of which is connected with the temperature sensor, and a second end of which is connected with the atomizing device 8, and is used for acquiring the exhaust temperature and controlling the spraying amount of the atomized water droplets of the atomizing device 8 according to the exhaust temperature. The controller may be electrically connected to the temperature sensor and the atomizing device 8, or may be wirelessly connected thereto.

Fig. 4 is a block diagram of an internal structure of a controller according to an embodiment of the present invention, specifically, the controller includes: the signal collector is connected with the temperature sensor and is used for obtaining the exhaust temperature; the temperature difference calculator is used for calculating the temperature difference between the exhaust temperature and the rated exhaust temperature; a signal generator for generating a first control signal to control the increase of the atomized water droplet ejection amount of the atomizing device 8 when the temperature difference is greater than a first threshold value; when the temperature difference is less than or equal to the first threshold and greater than or equal to the second threshold, generating a second control signal to control the atomized water droplet ejection amount of the atomization device 8 to be kept unchanged; when the temperature difference is smaller than the second threshold value, a third control signal is generated to control the atomization water droplet ejection amount of the atomization device 8 to decrease. In a specific embodiment, the range of increasing the amount of sprayed atomized water droplets is determined by the temperature difference, and the larger the temperature difference, the larger the amount of sprayed atomized water droplets. Similarly, the magnitude of decrease in the amount of sprayed atomized water droplets is determined by the temperature difference, and the greater the absolute value of the temperature difference, the greater the magnitude of decrease in the amount of sprayed atomized water droplets. The first control signal, the second control signal and the third control signal are transmitted to the atomization device by the signal generator, and the atomization device finally adjusts the spray amount of atomized water droplets through the atomization nozzle. The first threshold is a positive value, and the second threshold is a negative value.

In the present embodiment, the temperature sensor is provided in the secondary exhaust pipe 7. The temperature sensor can monitor the exhaust temperature of the secondary exhaust pipeline 7, and the signal collector converts the exhaust temperature into an electric signal and outputs the electric signal to the temperature difference calculator. Since the rated design parameters of the compressor are designed, the exhaust temperature of the secondary exhaust pipeline 7 needs to meet the corresponding design parameters, therefore, the mixed steam of the secondary intake pipeline cannot be cooled excessively, and the temperature needs to be controlled within a certain range. The temperature difference calculator receives the exhaust temperature of the temperature sensor, compares the exhaust temperature with the rated exhaust temperature, reduces the spraying amount of atomized water drops when the exhaust temperature of the secondary exhaust pipeline 7 is lower than the rated exhaust temperature to a certain degree, and improves the temperature of mixed steam in the secondary air inlet pipeline 5, so that the exhaust temperature of the secondary exhaust pipeline 7 is improved. On the contrary, if the exhaust temperature of the secondary exhaust pipeline 7 is higher than the rated exhaust temperature to a certain degree, the control system can increase the spraying amount of the atomized water droplets, further reduce the temperature of the mixed steam in the secondary air inlet pipeline 5, and more effectively protect the secondary impeller 015.

The signal acquisition time interval of the control system can be set according to the situation, and when the time interval is small, the memory required for storing the temperature data is large; when the time interval is larger, the collected temperature data is less, the spraying amount of the atomized water drops can not be accurately controlled, and therefore the cooling effect can not be accurately controlled. Therefore, the controller further includes: and the processor is used for adjusting the time interval for acquiring the exhaust temperature according to the deviation of the exhaust temperature acquired at two adjacent times. The method is specifically used for: when the deviation of the exhaust temperatures acquired at two adjacent times is greater than a first preset value, prolonging the time interval; when the deviation is smaller than or equal to the first preset value and larger than or equal to a second preset value, keeping the time interval unchanged; and when the deviation is smaller than the second preset value, shortening the time interval, wherein the first preset value is larger than the second preset value. The deviation of the exhaust gas temperatures acquired in two adjacent times is an absolute value of a difference between the exhaust gas temperatures acquired in two adjacent times, and therefore, is always greater than or equal to 0.

In order to store the temperature data, the controller further comprises a memory for storing the temperature data obtained by the temperature sensor.

Example 3

The embodiment provides an evaporation concentration system, which comprises a water vapor storage device and a water vapor compressor in the embodiment, and is used for improving the operation stability of the whole evaporation concentration system.

Example 4

The embodiment provides a steam centrifuge set, which comprises a steam storage device and a steam compressor in the above embodiment, and is used for improving the operation stability of the whole steam centrifuge set.

Example 5

The present embodiment provides a control method applied to the water vapor compressor in the above embodiments, and fig. 5 is a flowchart of the control method according to the embodiment of the present invention, as shown in fig. 5, the control method includes:

s101, acquiring the exhaust temperature of a secondary exhaust pipeline in the water vapor compressor.

S102, adjusting the spray amount of atomized water droplets of an atomizing device in the water vapor compressor according to the exhaust temperature; wherein, the atomization device is arranged on a pipeline between a secondary air inlet pipeline and a secondary impeller of the water vapor compressor.

The control method of the embodiment adjusts the spraying amount of the atomized water droplets of the atomization device according to the temperature difference between the exhaust temperature and the rated exhaust temperature, so as to avoid the situation that the mixed steam of the secondary air inlet pipeline cannot be cooled excessively and the temperature of the mixed steam needs to be controlled within a certain range.

Example 6

The present embodiment provides another control method, in order to accurately control the temperature of the secondary intake pipe and further control the exhaust temperature of the secondary exhaust pipe, for adjusting the amount of sprayed atomized water droplets of the atomizing device in the water vapor compressor according to the exhaust temperature, including: if the temperature difference between the exhaust temperature and the rated exhaust temperature is larger than a first threshold value, controlling the atomized water droplet ejection quantity of the atomization device to increase; if the temperature difference is less than or equal to a first threshold value and greater than or equal to a second threshold value, controlling the atomized water droplet ejection quantity of the atomization device to be kept unchanged; and if the temperature difference is smaller than the second threshold value, controlling the atomized water droplet ejection amount of the atomization device to be reduced.

The signal acquisition time interval of the control system can be set according to the situation, and when the time interval is small, the memory required for storing the temperature data is large; when the time interval is larger, the collected temperature data is less, the spraying amount of the atomized water drops can not be accurately controlled, and therefore the cooling effect can not be accurately controlled. Therefore, the control method further includes: and adjusting the time interval for acquiring the exhaust temperature according to the deviation of the exhaust temperature of the secondary exhaust pipeline in the water vapor compressor acquired twice. Specifically, adjusting the time interval for acquiring the exhaust temperature according to the deviation of the exhaust temperature of the secondary exhaust pipeline in the water vapor compressor acquired twice, comprises the following steps: if the deviation is greater than a first preset value, the time interval is prolonged; if the deviation is less than or equal to a first preset value and greater than or equal to a second preset value, keeping the current time interval unchanged; if the deviation is smaller than a second preset value, the time interval is shortened. Wherein the first preset value is larger than the second preset value.

Example 7

The present embodiment provides a computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the above-described control method.

The above-described embodiments of the vapor compression device are merely illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts shown as units may or may not be physical units, i.e. may be located in one place, or may also be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.