阅读说明：本技术 一种中深层地热高低温流体稳定蒸发调节系统及控制方法 (Stable evaporation regulation system and control method for medium-deep geothermal high-low temperature fluid ) 是由 李建峰 王连庆 蔡菁 于 2021-06-07 设计创作，主要内容包括：本发明属于中深层地热取热应用技术领域,公开了一种中深层地热高低温流体稳定蒸发调节系统及控制方法,所述中深层地热高低温流体稳定蒸发调节系统设置有：用以控制系统中的泵体和节流控制阀,调整系统中变频流量的变频流量控制模块；用以通过温差数字节流控制阀和蒸发循环泵,调整蒸发器内部的温度的蒸发温度控制模块；通过螺杆压缩机压缩机电动机和螺杆压缩机将吸入干燥的低温热饱和蒸汽,排入到冷凝器内释放热量为用户提供暖气的供暖模块；用以保持中深层地埋换热管正常运行的平衡水系统。本发明在运行过程中,可以提高温度,降低流量,增大温差,降低能耗。(The invention belongs to the technical field of middle-deep geothermal heat taking application, and discloses a middle-deep geothermal high-low temperature fluid stable evaporation regulating system and a control method, wherein the middle-deep geothermal high-low temperature fluid stable evaporation regulating system is provided with: the variable frequency flow control module is used for controlling a pump body and a throttle control valve in the system and adjusting variable frequency flow in the system; the evaporation temperature control module is used for adjusting the temperature in the evaporator through the temperature difference digital throttling control valve and the evaporation circulating pump; the heating module is used for absorbing dry low-temperature hot saturated steam through a screw compressor motor and the screw compressor, discharging the low-temperature hot saturated steam into a condenser and releasing heat to provide warm air for a user; the water balancing system is used for keeping the normal operation of the buried heat exchange pipe in the middle-deep layer. During the operation process, the invention can improve the temperature, reduce the flow, increase the temperature difference and reduce the energy consumption.)

1. The system for regulating the stable evaporation of the high-low temperature fluid of the middle-deep geothermal energy is characterized by comprising the following components in percentage by weight:

the variable frequency flow control module is used for controlling a pump body and a throttle control valve in the system and adjusting variable frequency flow in the system;

the evaporation temperature control module is used for adjusting the temperature in the evaporator through the temperature difference digital throttling control valve and the evaporation circulating pump;

the heating module is used for absorbing dry low-temperature hot saturated steam through a screw compressor motor and the screw compressor, discharging the low-temperature hot saturated steam into a condenser and releasing heat to provide warm air for a user;

the water balancing system is used for keeping the normal operation of the buried heat exchange pipe in the middle-deep layer.

2. The system for stable evaporation regulation of high and low temperature fluid in medium and deep geothermal energy as claimed in claim 1, wherein the variable frequency flow control module is provided with a variable frequency flow control box, and the variable frequency flow control box is respectively connected with the throttle expansion valve, the temperature difference digital throttle control valve and the high temperature water pump through wires.

3. The system for regulating the stable evaporation of a high-and-low temperature fluid in a medium-deep geothermal environment according to claim 1, wherein the evaporation temperature control module is provided with an evaporator, the evaporator is connected with an evaporation circulating pump through a pipe, and the evaporation circulating pump is connected with the evaporator through a pipe.

4. The system as claimed in claim 3, wherein the evaporation temperature control sensor is fixed on the conduit between the evaporation circulation pump and the evaporator, and is connected with the variable frequency flow control box.

5. The system for regulating the stable evaporation of a high-and-low temperature fluid in the middle-deep geothermal energy according to claim 1, wherein the balance water system is provided with an automatic expansion tank, and an automatic exhaust valve is arranged at the upper end of the automatic expansion tank.

6. The system for stable evaporation and regulation of high and low temperature fluid in medium and deep geothermal energy as claimed in claim 5, wherein the automatic expansion tank is connected with the high temperature water pump through a conduit, the high temperature water pump is connected with the digital temperature difference throttling control valve through a conduit, the digital temperature difference throttling control valve is connected with the evaporator, and a buried heat exchange tube in medium and deep layer is fixed between the automatic expansion tank and the evaporator.

7. The system for stable evaporation regulation of high and low temperature fluid at medium and deep geothermal levels of claim 6, wherein the digital throttle control valve is connected to the variable frequency flow control box via a data line.

8. The system for stable evaporation regulation of high and low temperature fluids at medium and deep geothermal levels of claim 1, wherein the heating module is provided with a compressor motor, the compressor motor being coupled to a screw compressor.

9. The system for stable evaporation regulation of a high and low temperature fluid at a medium and deep geothermal temperature according to claim 8, wherein the screw compressor is connected to a throttle expansion valve through a pipe, and the throttle expansion valve is connected to the condenser through a pipe.

10. The method for regulating the stable evaporation of a medium-deep-layer geothermal high-and-low-temperature fluid by the system for regulating the stable evaporation of a medium-deep-layer geothermal high-and-low-temperature fluid according to any one of claims 1 to 9, comprising:

starting a high-temperature water pump, and conveying high-temperature fluid at the temperature of more than 60 ℃ into a pipe network of the temperature difference digital throttling control valve; then the variable frequency flow control box carries out adaptive operation according to an evaporation temperature data signal transmitted by the evaporation temperature sensor, automatically adjusts the instruction of the high-temperature water quantity according to the temperature change condition in the evaporator, and adjusts the heat stable supply of the high-temperature flow to the evaporation circulating pump by controlling the opening and closing of the temperature difference digital throttle valve to ensure that the evaporation temperature in the evaporator is stably controlled to be about 6 ℃;

the throttle expansion valve controls the flow of the throttle expansion valve according to the evaporation temperature transmitted by the temperature sensing bulb, so that a motor of the screw compressor and the screw compressor suck dry low-temperature hot saturated steam, and high-temperature and high-pressure hot steam is generated after being compressed by the screw compressor and is discharged into the condenser to release heat, thereby providing economic and efficient heating for users;

in the whole heating heat pump system, the automatic expansion tank and the automatic exhaust valve stabilize the expansion and exhaust of the heat source water body, and the balance water system ensures the normal operation of the middle-deep buried heat exchange tube and the middle-deep geothermal heat source heat exchange tube.

Technical Field

The invention belongs to the technical field of middle-deep geothermal heat taking application, and particularly relates to a middle-deep geothermal high-low temperature fluid stable evaporation regulating system and a control method.

Background

At present, the heat source grade of the existing heat pump is low, the flow is large, the temperature difference is small, for example, the water source heat pump unit can only prevent the outlet of the evaporator from being frozen by ensuring enough flow or water quantity, and the energy consumption of the heat source pump is large and uneconomical. At present, a high-low flow stable heat-taking device with medium-deep geothermal variable flow enables high-temperature fluid on the geothermal heat source side to be sufficient and stable, the requirement of a heat pump on accurate and efficient adjustment of the temperature and the flow of a heat source during heat supply of the heat pump unit is met, the high-temperature fluid is perfectly and accurately distributed to flow to be supplied to an evaporator, the high-temperature fluid stably absorbs heat according to the evaporator, and the frequency conversion energy consumption of the heat source pump is greatly reduced.

Through the above analysis, the problems and defects of the prior art are as follows: the prior art has low temperature, large flow, large temperature difference and large energy consumption.

The difficulty in solving the above problems and defects is: instantaneous flow, accumulated flow and temperature value are processed and converted by a variable frequency flow control module, the acquisition and conversion time is long, the data is updated once in 60 seconds, the field flow data and the temperature data cannot be read in real time, and great trouble is caused to the flow.

The significance of solving the problems and the defects is as follows: in order to achieve the real-time and accuracy of the flow feedback data adjustment, the flow data real-time acquisition technology needs to be optimized, and the expected stable, accurate, efficient and energy-saving heat supply effect is achieved.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a stable evaporation regulation system for high-low temperature fluid of intermediate-deep geothermal heat and a control method.

The invention is realized in this way, a middle-deep geothermal high-low temperature fluid stable evaporation regulating system and a control method, the middle-deep geothermal high-low temperature fluid stable evaporation regulating system is provided with:

the variable frequency flow control module is used for controlling a pump body and a throttle control valve in the system and adjusting variable frequency flow in the system;

the evaporation temperature control module is used for adjusting the temperature in the evaporator through the temperature difference digital throttling control valve and the evaporation circulating pump;

the heating module is used for sucking dry low-temperature hot saturated steam into the compressor through a motor of the screw compressor and a screw and discharging the dry low-temperature hot saturated steam into the condenser to release heat so as to provide warm air for a user;

the water balancing system is used for keeping the normal operation of the buried heat exchange pipe in the middle-deep layer.

Furthermore, the variable frequency flow control module is provided with a variable frequency flow control box, and the variable frequency flow control box is respectively connected with the throttling expansion valve, the temperature difference digital throttling control valve and the high-temperature water pump through leads.

Further, the evaporation temperature control module is provided with an evaporator, the evaporator is connected with an evaporation circulating pump through a guide pipe, and the evaporation circulating pump is connected with the evaporator through a guide pipe.

Furthermore, an evaporation temperature control sensor is fixed on a guide pipe between the evaporation circulating pump and the evaporator, and the evaporation temperature control sensor is connected with the variable frequency flow control box.

Further, the balance water system is provided with an automatic expansion tank, and the upper end of the automatic expansion tank is provided with an automatic exhaust valve.

Furthermore, the automatic expansion tank is connected with a high-temperature water pump through a guide pipe, the high-temperature water pump is connected with a temperature difference digital throttling control valve through a guide pipe, the temperature difference digital throttling control valve is connected with an evaporator, and a middle-deep buried heat exchange pipe is fixed between the automatic expansion tank and the evaporator.

Furthermore, the temperature difference digital throttle control valve is connected with the variable frequency flow control box through a data line.

Further, the heating module is provided with a compressor motor, and the compressor motor is connected with the screw compressor.

Further, the screw compressor is connected with a throttle expansion valve through a guide pipe, and the throttle expansion valve is connected with the condenser through a guide pipe.

Another object of the present invention is to provide a method for regulating stable evaporation of a medium-deep-layer geothermal high-and-low temperature fluid in a system for regulating stable evaporation of a medium-deep-layer geothermal high-and-low temperature fluid, the method comprising:

starting a high-temperature water pump, and conveying high-temperature fluid at the temperature of more than 60 ℃ into a pipe network of the temperature difference digital throttling control valve; then the variable frequency flow control box carries out adaptive operation according to an evaporation temperature data signal transmitted by the evaporation temperature sensor, automatically adjusts the instruction of the high-temperature water quantity according to the temperature change condition in the evaporator, and adjusts the heat stable supply of the high-temperature flow to the evaporation circulating pump by controlling the opening and closing of the temperature difference digital throttle valve to ensure that the evaporation temperature in the evaporator is stably controlled to be about 6 ℃;

the throttle expansion valve controls the flow of the throttle expansion valve according to the evaporation temperature transmitted by the temperature sensing bulb, so that a motor of the screw compressor and the screw compressor suck dry low-temperature hot saturated steam, and high-temperature and high-pressure hot steam is generated after being compressed by the screw compressor and is discharged into the condenser to release heat, thereby providing economic and efficient heating for users;

in the whole heating heat pump system, the automatic expansion tank and the automatic exhaust valve stabilize the expansion and exhaust of the heat source water body, and the balance water system ensures the normal operation of the middle-deep buried heat exchange tube and the middle-deep geothermal heat source heat exchange tube.

By combining all the technical schemes, the invention has the advantages and positive effects that: the invention has the advantages of stable heat source flow, stable flow velocity, stable temperature difference, accurate heat source heat supply adjustment, stable water quantity change in the evaporator body and stable evaporation temperature, ensures that the compressor sucks dry hot saturated steam stably, the exhaust temperature is stable, and the energy consumption for releasing heat is reduced, thereby providing a high-efficiency and economical heat supply effect for users.

The invention fills a new way for an evaporator to obtain stable heat and continuously supply heat in the soil ground source heat pump industry, and compared with the prior art, the technology has the following advantages: the investment is small, the effect is quick, the huge commercial value is obtained, the popularization value is huge, and the energy efficiency ratio of the original heat pump is 1: 3 to 1: 7, very good results were obtained.

The invention relates to a high-temperature fluid which absorbs heat from a medium-deep geothermal energy and supplies the heat to a heat pump system in a variable flow control mode, and an accurate and efficient adjusting device which stably and continuously supplies heat flow to an inner water system of a heat pump evaporator. During the operation process, the invention can improve the temperature, reduce the flow, increase the temperature difference and reduce the energy consumption.

Drawings

Fig. 1 is a schematic structural diagram of a regulating device of a medium-deep buried pipe geothermal-flow high-low temperature fluid stable evaporation vessel provided by an embodiment of the invention.

In the figure: 1. a compressor motor; 2. a screw compressor; 3. a throttle expansion valve; 4. an evaporator; 5. a condenser; 6. an evaporation circulating pump; 7. a temperature difference digital throttle control valve; 8. a variable frequency flow control box; 9. a high-temperature water pump; 10. an automatic expansion tank; 11. the heat exchange tube is buried in the middle-deep layer; 12. an automatic exhaust valve; 13. an evaporation temperature control sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following 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.

Aiming at the problems in the prior art, the invention provides a regulating device for a medium-deep buried pipe geothermal-current-transformation high-low temperature fluid stable evaporation container, which is described in detail below with reference to the attached drawings.

The adjusting device for the high-low temperature fluid stable evaporation container with the geothermal conversion buried pipe in the middle deep layer provided by the invention can be implemented by other steps by persons skilled in the art, and the adjusting device for the high-low temperature fluid stable evaporation container with the geothermal conversion buried pipe in the middle deep layer provided by the invention in fig. 1 is only one specific embodiment.

As shown in fig. 1, the regulating device for a geothermal-to-fluid high-low temperature fluid stable evaporation container provided by the embodiment of the invention is provided with an automatic expansion tank 10, and an automatic exhaust valve 12 is arranged at the upper end of the automatic expansion tank 10. The automatic expansion tank 10 is connected with a high-temperature water pump 9 through a guide pipe, the high-temperature water pump 9 is connected with a temperature difference digital throttling control valve 7 through a guide pipe, the temperature difference digital throttling control valve 7 is connected with the evaporator 4, and a middle-deep buried heat exchange pipe 11 is fixed between the automatic expansion tank 10 and the evaporator 4; wherein, the temperature difference digital throttle control valve 7 is connected with the variable frequency flow control box 8 through a data line.

The evaporator 4 is connected with an evaporation circulating pump 6 through a guide pipe, and the evaporation circulating pump 6 is connected with the evaporator 4 through a guide pipe; an evaporation temperature control sensor 13 is fixed on a guide pipe between the evaporation circulating pump 6 and the evaporator 4; the evaporator 4 is connected with the screw compressor 2 through a guide pipe, and the screw compressor 2 is connected with the compressor motor 1 through a guide pipe; the evaporator 4 and the screw compressor 2 are connected to a throttle expansion valve 3 through a conduit, and the throttle expansion valve 3 is connected to a condenser 5 through a conduit.

Wherein, the variable frequency flow control box 8 is respectively connected with the compressor motor 1, the temperature difference digital throttle control valve 7 and the evaporation temperature control sensor 13 through leads.

The working principle of the invention is as follows: the high-temperature water pump 9 is started, high-temperature fluid above 60 ℃ is conveyed into a pipe network of the temperature difference digital throttling control valve 7, then the variable-frequency flow control box 8 carries out adaptive operation according to evaporation temperature data signals transmitted by the evaporation temperature sensor 13, the high-temperature water quantity instruction is automatically adjusted according to the temperature change condition in the evaporator, the high-temperature water quantity is stably supplied to the evaporation circulating pump 6 by adjusting the high-temperature water quantity through the opening degree of the temperature difference digital throttling control valve 7 and the small opening degree, so that the evaporation temperature in the evaporator is stably controlled to be about 2 ℃. The throttle expansion valve 3 controls the flow of the throttle expansion valve according to the evaporation temperature transmitted by the temperature sensing bulb, so that the screw compressor motor 1 and the screw compressor 2 suck dry low-temperature hot saturated steam, the high-temperature high-pressure hot steam is generated after being compressed by the screw compressor 2 and is discharged into the condenser 5 to release heat, economic and efficient heating is provided for users, the automatic expansion tank 10 in the whole heating heat pump system is provided with the automatic exhaust valve 12 to play a role in stabilizing expansion and exhaust of a heat source water body, and the water balance system plays an important role in normal operation of a heat source heat exchange tube of a deep geothermal heat source in the heat exchange tube 11 buried in a middle-deep layer.

TABLE 1 comparison of the prior art with the present invention

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.