A geothermal heat exchange station system

Abstract

The present invention provides a geothermal heat exchange station system, including a water collector, a geothermal heating unit, a heat exchange pipeline arranged in a geothermal well, a control system and a data fusion device, the water inlet ends of the heat exchange pipelines are respectively connected to the water collectors, and the water outlet ends of the heat exchange pipelines are in a tree-like shape; at least two independent heat exchange pipelines form a group, and one water outlet end of each independent heat exchange pipeline in the same group is first connected to each other, and then connected to the geothermal heating unit; the other water outlet end of each independent heat exchange pipeline is respectively connected to the water collector; the control system includes a collection part and a control part for collecting the outlet water temperature and the outlet water flow. The present application divides at least two independent heat exchange pipelines into a group, while reducing the number of sensors and flow meters used; reducing the error between the total outlet water temperature entering the geothermal heating unit and the temperature sensor monitoring; and providing a guarantee that the water temperature and water volume of the total hot water source entering the geothermal heating unit per unit time meet the design requirements.

Description

Technical Field

[0001] The present invention relates to the field of geothermal technology, and in particular to a geothermal energy heat exchange station system. Background Art

[0002] At present, the non-interference geothermal (hot dry rock) heating technology refers to a new technology that uses a drilling rig to drill a hole into a high-temperature rock layer at a certain depth underground, installs a closed metal heat exchanger in the hole, conducts the heat energy from deep underground through the heat exchanger, and supplies heat to ground buildings through a special equipment system. Existing heat exchange devices for geothermal exploitation generally use one pipeline or multiple pipelines in series for heat exchange. However, when the temperature of one of the pipelines is abnormal, it is easy to affect the overall heat exchange efficiency. In order to avoid this situation, the utility model "A non-interference heat source automatic intelligent heat exchange device" with authorization announcement number CN212930533U adopts multiple heat pipes in parallel to overcome the problem that the failure of a certain circulation pipeline affects the heat exchange function of other heat exchange pipelines. However, the defect of this solution is that flow sensors and temperature sensors are respectively arranged on separate heat exchange pipelines to detect the flow of each water inlet pipeline and the medium temperature of each water outlet pipeline. There are many flow sensors and temperature sensors, and they can only control the outlet water heat of a separate heat exchange pipeline. It cannot ensure that the overall water temperature and water inlet volume of the hot water source entering the geothermal heating unit meet actual needs. Summary of the invention

[0003] In view of this, the present application provides a geothermal heat exchange station system, which is used to solve the problem that the above-mentioned prior art cannot ensure that the water temperature and water inflow of the total hot water source entering the geothermal heating unit meet the actual needs. The specific solution is:

[0004] A geothermal heat exchange station system, comprising:

[0005] A water collector connected to a first cold water source;

[0006] A geothermal heating unit, the input end of which is connected to a second cold water source, and the output end of which is connected to each user end respectively;

[0007] There are several heat exchange pipelines, which are respectively arranged in the geothermal wells. The water inlet ends of the heat exchange pipelines are respectively connected to the water collectors, and the water outlet ends of the heat exchange pipelines are in a tree-branch shape; at least two independent heat exchange pipelines form a group, and one water outlet end of each independent heat exchange pipeline in the same group is first connected to each other, and then connected to the geothermal heating unit as a hot water source for the geothermal heating unit; the other water outlet end of each independent heat exchange pipeline is respectively connected to the water collector;

[0008] A control system, comprising at least two independent heat exchange pipelines, wherein the at least two independent heat exchange pipelines are connected in parallel and connected to a primary intelligent control device;

[0009] The collecting part is configured to collect the outlet water temperature and the outlet water flow rate, and the collecting part is respectively arranged on the outlet water pipeline after each group of heat exchange pipelines connected to each other are connected;

[0010] The control part is configured to record and analyze the collected original data of the outlet water temperature and the outlet water flow rate, and generate control instructions based on the data analysis results;

[0011] A data fusion device configured to fuse the data information transmitted by at least two control parts to generate gradient data of the difference between any two sets of fused data;

[0012] The data fusion device is configured to fuse the data information transmitted by at least two control parts to generate gradient data of the difference between any two groups of fused data, and is connected to each of the control parts respectively, and each group of gradient data is randomly sent to the two control parts respectively. The control part compares the received gradient data with the data information of the group, and controls the flow direction and flow rate of the liquid in the independent pipelines in the group according to the comparison results.

[0013] Preferably, the data analysis specifically includes: performing a volatility analysis on each set of gradient data received, calculating the fluctuation range, and comparing all the fluctuation ranges with the set threshold ranges respectively; if the fluctuation range is greater than the threshold range, it is determined to be abnormal and the first control instruction is issued; if the fluctuation range is within the threshold range, it is determined to be normal.

[0014] Preferably, the first control instruction is to call out two groups of data with large gradient data differences, and compare the two groups of data with the average data of the remaining groups with smaller fluctuation ranges collected at the same time, and determine the group with larger difference as abnormal, and determine the group with smaller difference as normal;

[0015] The fused data judged to be abnormal is analyzed. If the fused data is less than the set threshold, it is judged as a pipeline fault and the system issues a maintenance command. If the fused data is greater than the set threshold, it is judged that the heat exchange temperature does not meet the standard. The control system sends a command to the reversing valve located on the heat exchange pipeline to return the outlet water to the water collector for re-heat exchange.

[0016] Preferably, the threshold value is a ratio of rated water flow to temperature.

[0017] Preferably, the collection part includes: a first temperature sensor and a flow meter;

[0018] The first temperature sensor and the flow meter are respectively arranged on the water outlet pipeline after each group of heat exchange pipelines connected to each other are connected, and the first temperature sensor and the flow meter are respectively connected to the control part of the same group.

[0019] Preferably, reversing valves are respectively provided at the connecting parts of the independent heat exchange pipelines in the same group;

[0020] The reversing valves are connected to the control parts of the same group accordingly.

[0021] Preferably, the heat source input end of the geothermal heating unit is respectively provided with a flow regulating valve, and the output end of the geothermal heating unit is provided with a second temperature sensor and a first solenoid valve;

[0022] The flow regulating valves are respectively connected to the control parts of the same group;

[0023] The flow regulating valve, the second temperature sensor and the first solenoid valve are respectively connected to the control system of the geothermal heating unit.

[0024] Preferably, a partition is provided in the water collector;

[0025] The partition divides the water collector into an independent first water storage chamber and a second water storage chamber, and a connecting port between the first water storage chamber and the second water storage chamber is provided on the partition;

[0026] The first water storage chamber and the second water storage chamber are arranged horizontally, and a return water inlet and a first cold water source water inlet are respectively arranged on opposite sides of the first water storage chamber and the second water storage chamber;

[0027] The second water storage chamber is provided with a water outlet;

[0028] The water outlet is located on the same side as the first cold water source water inlet, and is located above the first cold water source water inlet and below the return water inlet;

[0029] A third solenoid valve is provided at the communication port;

[0030] The third solenoid valves are respectively connected to the control parts of the same group.

[0031] Compared with the prior art, the beneficial effects of this application are:

[0032] In the present application, at least two independent heat exchange pipelines are divided into a group, which avoids the need to set temperature sensors and flow meters in each independent heat exchange pipeline in conventional means, greatly reducing the number of sensors and flow meters used; it avoids the energy loss on the way from the hot water in the heat exchange pipeline to the geothermal heating unit in conventional means, resulting in a large difference between the actual outlet water temperature entering the geothermal heating unit and the temperature monitored by the actual temperature sensor; at the same time, several independent heat exchange pipelines are integrated and then connected to the geothermal heating unit, reducing the need for independent heat exchange pipelines to be connected to the geothermal heating unit separately. The complicated connection method, while ensuring that the water temperature and water volume of the total hot water source entering the geothermal heating unit per unit time meet the design requirements, increases the amount of hot water entering the geothermal heating unit per unit time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0034] In the attached picture:

[0035] Figure 1 This is a schematic diagram of the structure of a geothermal heat exchange station system in an embodiment of the present invention;

[0036] Figure 2 This is a schematic structural diagram of a water collector in a geothermal heat exchange station system in an embodiment of the present invention;

[0037] Figure 3 This is a flow chart of a geothermal heat exchange station system in an embodiment of the present invention;

[0038] Among them, 1-water collector, 2-second solenoid valve, 3-geothermal heating unit, 4-first solenoid valve, 5-first output pipe, 6-second output pipe, 7-flow regulating valve, 8-flow meter, 9-first temperature sensor, 10-solenoid valve, 11-second temperature sensor, 12-first cold water source, 13-connecting port, 14-reversing valve, 15-water outlet, 16-second cold water source. DETAILED DESCRIPTION

[0039] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0040] According to the attached Figure 1-3 A geothermal heat exchange station system shown includes:

[0041] The water collector 1 is connected to a first cold water source;

[0042] The geothermal heating unit 3 has an input end connected to a second cold water source, and an output end of the geothermal heating unit 3 is respectively connected to each user end;

[0043] There are several heat exchange pipelines, which are respectively arranged in the geothermal wells. The water inlet ends of the heat exchange pipelines are respectively connected to the water collectors 1, and the water outlet ends of the heat exchange pipelines are in a tree-branch shape; at least two independent heat exchange pipelines form a group, and one water outlet end of each independent heat exchange pipeline in the same group is first connected to each other, and then connected to the geothermal heating unit 3, as a hot water source for the geothermal heating unit 3; the other water outlet end of each independent heat exchange pipeline is respectively connected to the water collector 1;

[0044] A control system, comprising at least two independent heat exchange pipelines, wherein the at least two independent heat exchange pipelines are connected in parallel and connected to a primary intelligent control device, and each primary intelligent control device comprises a collection part and a control part;

[0045] The collecting part is configured to collect the outlet water temperature and the outlet water flow rate, and the collecting part is respectively arranged on the outlet water pipeline after each group of heat exchange pipelines connected to each other are connected;

[0046] The control part is configured to record and analyze the collected original data of the outlet water temperature and the outlet water flow rate, and generate control instructions based on the data analysis results;

[0047] The data fusion device is configured to generate gradient data of the difference between any two groups of fused data after fusing the data information transmitted by at least two control parts, and is connected to each of the control parts respectively, and each group of gradient data is randomly sent to the two control parts respectively. The control part compares the received gradient data with the data information of the group, and controls the flow direction and flow rate of the liquid in the independent pipelines in the group according to the comparison result.

[0048] Furthermore, the data analysis specifically includes: performing volatility analysis on each set of gradient data received, calculating the fluctuation range, comparing all fluctuation ranges with the set threshold range respectively, if the fluctuation range is greater than the threshold range, it is determined to be abnormal and the first control instruction is issued; if the fluctuation range is within the threshold range, it is determined to be normal.

[0049] Furthermore, the first control instruction is specifically to call out two groups of data with large gradient data differences, and compare the two groups of data with the average data of the remaining groups with smaller fluctuation ranges collected at the same time, and determine the group with larger difference as abnormal, and determine the group with smaller difference as normal;

[0050] The fused data judged to be abnormal is analyzed. If the fused data is less than the set threshold, it is judged to be a pipeline fault and the system issues a maintenance command. If the fused data is greater than the set threshold, it is judged that the heat exchange temperature does not meet the standard. The control system issues a command to the reversing valve located on the heat exchange pipeline to return the outlet water to the collector 1 for reheating.

[0051] Furthermore, the threshold is a ratio of rated water flow to temperature.

[0052] Further, the acquisition part includes: a first temperature sensor 9 and a flow meter 8;

[0053] The first temperature sensor 9 and the flow meter 8 are respectively arranged on the water outlet pipeline after each group of heat exchange pipelines connected to each other are connected, and the first temperature sensor 9 and the flow meter 8 are respectively connected to the control part of the same group.

[0054] Furthermore, reversing valves 14 are respectively provided at the connecting parts of the independent heat exchange pipelines in the same group;

[0055] The reversing valves 14 are connected to the control parts of the same group accordingly.

[0056] Furthermore, the heat source input end of the geothermal heating unit 3 is respectively provided with a flow regulating valve 7, and the output end of the geothermal heating unit 3 is provided with a second temperature sensor 11 and a first solenoid valve 4;

[0057] The flow regulating valves 7 are respectively connected to the control parts of the same group;

[0058] The second temperature sensor 11 and the first solenoid valve 4 are respectively connected to the control system of the geothermal heating unit 3 .

[0059] A partition is provided in the water collector 1;

[0060] The partition divides the water collector 1 into an independent first water storage chamber and a second water storage chamber, and a connecting port 13 between the first water storage chamber and the second water storage chamber is provided on the partition;

[0061] The first water storage chamber and the second water storage chamber are arranged horizontally, and a return water inlet and a first cold water source water inlet are respectively arranged on opposite sides of the first water storage chamber and the second water storage chamber;

[0062] The second water storage chamber is provided with a water outlet 15;

[0063] The water outlet 15 is located on the same side as the first cold water source water inlet, and is located above the first cold water source water inlet and below the return water inlet;

[0064] A third solenoid valve is provided at the communication port 13;

[0065] The third solenoid valves are respectively connected to the control parts of the same group.

[0066] It should be noted that:

[0067] In the present application, two or more independent heat exchange pipelines are grouped together, and one output end of each independent heat exchange pipeline in the same group is first connected to each other, and a reversing valve 14 is provided at the connection point. After one output end of each independent pipeline is connected to each other, it is connected to the input end of the geothermal heating unit 3 through the first transmission pipeline; the other output end of each independent pipeline is respectively connected to the return port of the water collector 1; the first transmission pipeline transports the hot water obtained by heat exchange of each independent heat exchange pipeline in the same group to the geothermal heating unit 3, and exchanges heat with the second cold water source 16 in the geothermal heating unit 3;

[0068] Among them, each group of heat exchange pipelines is matched with a primary intelligent control device, and each primary intelligent control device includes a control part and a collection part, wherein the collection part is connected to the control part, and the collection part includes a first temperature sensor 9 and a flow meter 8, and the first temperature sensor 9 and the flow meter 8 are correspondingly arranged on each first transmission pipeline, and are used to collect the outlet water temperature and outlet water flow of each group of total hot water; then the collected data are fed back to the same control part, and the control part records the received temperature and outlet water flow as the original collected data and performs data analysis and processing, and then converts it into the ratio of the outlet water temperature to the outlet water flow and transmits it to the data fusion device for data fusion. The data fusion device fuses the data information transmitted by at least two control parts to generate any two The gradient data of the difference of the group fusion data, the gradient data refers to the average value of the ratio of temperature to flow in the two groups of data to be fused, each group of gradient data is randomly sent to two control parts, and the control parts respectively perform data analysis on the received gradient data, specifically: the control part performs volatility analysis on the received gradient data and the data information obtained by the group, calculates the fluctuation range of the group data relative to the gradient data, and compares the obtained fluctuation range with the set threshold range. If the fluctuation range is greater than the rated threshold range, it is determined to be a faulty pipeline and the first control instruction is issued; if the fluctuation range is within the threshold range, it is determined to be normal; if the fluctuation range is less than the rated threshold range, it is determined that the outlet water temperature of the group does not meet the standard, and the second control instruction is issued at this time;

[0069] The first control instruction refers to controlling the reversing valve 14 corresponding to the fluctuation range of the gradient data to be greater than the rated threshold range to be reversed in sequence. When the fluctuation range is within the threshold range, the previous independent heat exchange pipeline is determined to be a faulty pipeline. At this time, the control part marks the faulty heat exchange pipeline and issues a prompt to repair the heat exchange pipeline.

[0070] Among them, the second control instruction refers to controlling the reversing valve 14 corresponding to the fluctuation range of the gradient data to be greater than the rated threshold range to be reversed in sequence. When the fluctuation range is within the threshold range, it is determined that the outlet water temperature of the previous independent heat exchange pipeline does not meet the standard. At this time, the control part marks the heat exchange pipeline whose outlet water temperature does not meet the standard, and controls the second solenoid valve corresponding to the heat exchange pipeline to return the outlet water to the water collector 1, and then re-enter the heat exchange pipeline for heat exchange;

[0071] In one embodiment of the present application, the output end of the heat exchange pipeline includes a first output pipe 5 and a second output pipe 6, one end of the first output pipe 5 and the second output pipe 6 are connected to the outlet pipe of the heat exchange pipeline, the outlet ends of the first output pipes 5 of the independent heat exchange pipelines in the same group are connected to each other, and then connected to the geothermal heating unit 3, and a reversing valve 14 is provided at one end of the first output pipe 5 connected to each other; the second output pipe 6 is connected to the water collector 1 at one end away from the heat exchange pipeline. When the outlet water temperature of the same group flowing into the geothermal heating unit 3 meets the standard, it is directly transported to the geothermal heating unit 3 through the transportation pipeline. When the outlet water temperature of the heat exchange pipeline does not meet the standard, it flows back to the water collector 1 through the second output pipe 6 to re-exchange heat until the temperature meets the standard, wherein the second output pipe 6 is also provided with a second solenoid valve 2, and the second solenoid valve 2, the solenoid valve 10, the flow regulating valve 7, the flow meter 8, the first temperature sensor 9 and the third solenoid valve are respectively connected to the control part of the same group;

[0072] In the present application, the second temperature sensor 11 and the first solenoid valve 4 are respectively connected to the control system of the geothermal heating unit 3;

[0073] In the present application, at least two independent heat exchange pipelines are divided into a group, which avoids the need to set temperature sensors and flow meters in each independent heat exchange pipeline in conventional means, greatly reducing the number of sensors and flow meters used; it avoids the energy loss on the way from the hot water in the heat exchange pipeline to the geothermal heating unit 3 in conventional means, resulting in a large difference between the actual outlet water temperature entering the geothermal heating unit 3 and the temperature monitored by the actual temperature sensor; at the same time, several independent heat exchange pipelines are integrated and then connected to the geothermal heating unit 3, while reducing the need for the independent heat exchange pipelines to be connected to the geothermal heating unit 3. The complicated connection method is increased, and the hot water source entering the geothermal heating unit 3 per unit time;

[0074] In the present application, the water outlet temperature and water outlet flow rate of each group are monitored in real time through the collection part of each group, and the control part of each corresponding group performs data analysis and processing based on the data fed back by the collection part and sends the result to the data fusion device. The data fusion device generates gradient data of the difference between any two groups of fused data, establishes a dynamic detection standard, and then randomly sends each group of gradient data to the two control parts for data comparison to achieve dynamic mutual inspection. The control part controls the flow direction and flow rate of the liquid in the independent pipelines in the group according to the comparison results of the data to achieve dynamic regulation. While maintaining the water temperature and flow rate of the hot water source entering the geothermal heating unit 3 in accordance with the set requirements, the faulty heat exchange pipeline is marked and then the third solenoid valve located on the heat exchange pipeline is closed.

[0075] In one embodiment of the present application, the reversing valve 14 is determined according to the number of independent pipelines actually connected;

[0076] In one embodiment of the present application, by setting a water collector 1, hot water whose outlet temperature does not meet the standard after heat exchange enters the water collector 1 and is then mixed with the first cold water source 12 and randomly enters any heat exchange pipeline for heat exchange, thereby avoiding returning to the original heat exchange pipeline when reheating, and the heat still cannot meet the standard, and avoiding the waste of the outlet water that has been heat exchanged due to a faulty pipeline;

[0077] In one embodiment of the present application, the individual heat exchange pipelines are all U-shaped tubes.

[0078] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A geothermal heat exchange station system, It is characterized in that include: A water collector (1) is connected to a first cold water source; A geothermal heating unit (3), the input end of which is connected to a second cold water source, and the output end of which is connected to each user end respectively; A plurality of heat exchange pipelines are provided, each correspondingly arranged in a geothermal well, the water inlet ends of the heat exchange pipelines are respectively connected to the water collector (1), and the water outlet ends of the heat exchange pipelines are in a tree-branch shape; at least two independent heat exchange pipelines form a group, and one water outlet end of each independent heat exchange pipeline in the same group is first connected to each other and then connected to a geothermal heating unit (3) as a hot water source for the geothermal heating unit (3); the other water outlet end of each independent heat exchange pipeline is respectively connected to the water collector (1); A control system, comprising at least two independent heat exchange pipelines, wherein the at least two independent heat exchange pipelines are connected in parallel and connected to a primary intelligent control device, and each primary intelligent control device comprises a collection part and a control part; The collecting part is configured to collect the outlet water temperature and the outlet water flow rate, and the collecting part is respectively arranged on the outlet water pipeline after each group of heat exchange pipelines connected to each other are connected; The control part is configured to record and analyze the collected original data of the outlet water temperature and the outlet water flow rate, and generate control instructions based on the data analysis results; The data fusion device is configured to generate gradient data of the difference between any two groups of fused data after fusing the data information transmitted by at least two control parts, and is connected to each of the control parts respectively, and each group of gradient data is randomly sent to the two control parts respectively. The control part compares the received gradient data with the data information of the group, and controls the flow direction and flow rate of the liquid in the independent pipelines in the group according to the comparison result.

2. A geothermal heat exchange station system according to claim 1, It is characterized in that The data analysis specifically includes: performing a volatility analysis on each set of gradient data received, calculating the fluctuation range, and comparing all the fluctuation ranges with the set threshold ranges respectively; if the fluctuation range is greater than the threshold range, it is determined to be abnormal and the first control instruction is issued; if the fluctuation range is within the threshold range, it is determined to be normal.

3. A geothermal heat exchange station system according to claim 2, It is characterized in that The first control instruction is specifically to call out two groups of data with large gradient data differences, and compare the two groups of data with the average data of the remaining groups with smaller fluctuation ranges collected at the same time, and determine the group with the larger difference as abnormal, and the group with the smaller difference as normal; The fused data judged to be abnormal is analyzed. If the fused data is less than a set threshold, it is judged to be a pipeline fault and the system issues a maintenance instruction. If the fused data is greater than the set threshold, it is judged that the heat exchange temperature does not meet the standard, and the control system issues an instruction to the reversing valve located on the heat exchange pipeline to return the outlet water to the water collector (1) for reheating.

4. A geothermal heat exchange station system according to claim 3, It is characterized in that The threshold value is the ratio of the rated water flow to the temperature.

5. A geothermal heat exchange station system according to claim 2, It is characterized in that The collection part comprises: a first temperature sensor (9) and a flow meter (8); The first temperature sensor (9) and the flow meter (8) are respectively arranged on the water outlet pipeline after each group of heat exchange pipelines connected to each other are connected, and the first temperature sensor (9) and the flow meter (8) are respectively connected to the control part of the same group.

6. A geothermal heat exchange station system according to claim 2, It is characterized in that Reversing valves (14) are respectively provided at the connecting points of the independent heat exchange pipelines in the same group; The reversing valves (14) are correspondingly connected to the control parts of the same group.

7. A geothermal heat exchange station system according to claim 5, It is characterized in that The heat source input end of the geothermal heating unit (3) is respectively provided with a flow regulating valve (7), and the output end of the geothermal heating unit (3) is provided with a second temperature sensor (11) and a first electromagnetic valve (4); The flow regulating valves (7) are respectively connected to the control parts of the same group; The second temperature sensor (11) and the first solenoid valve (4) are respectively connected to the control system of the geothermal heating unit (3).

8. A geothermal heat exchange station system according to claim 1, It is characterized in that A partition is provided in the water collector (1); The partition divides the water collector (1) into an independent first water storage chamber and a second water storage chamber, and a communication port (13) between the first water storage chamber and the second water storage chamber is provided on the partition; The first water storage chamber and the second water storage chamber are arranged horizontally, and a return water inlet and a first cold water source water inlet are respectively arranged on opposite sides of the first water storage chamber and the second water storage chamber; The second water storage chamber is provided with a water outlet (15); The water outlet (15) is located on the same side as the first cold water source water inlet, and is located above the first cold water source water inlet and below the return water inlet; A third solenoid valve is provided at the communication port (13); The third solenoid valves are respectively connected to the control parts of the same group.

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