A pry block ORC generator set capable of controlling the outlet temperature of a heat source

Abstract

The utility model discloses a pry block ORC generating set of controllable heat source export temperature, including bottom frame, fixedly installed in bottom frame have working medium pump and electric control cabinet, is installed with condenser through top crossbeam on bottom frame, and working medium pump is connected with condenser through working medium pump import pipeline, and one side through support frame of bottom frame is installed with evaporator, and working medium pump is connected with evaporator through working medium pump export pipeline, and is installed with turbine generator through turbine support on evaporator, is provided with turbine export pipeline between turbine generator and condenser, and working medium pump export pipeline is connected with working medium shunt pipeline, compared with prior art, the utility model discloses a working medium shunt pipeline with regulating valve is additionally arranged at working medium pump export, and is matched with the design of integral type special structure evaporator with preheating section, liquid level and evaporation section, under the premise of not increasing unit volume and complexity significantly, successfully integrated heat source export temperature control function, and the compactness of pry block unit and the completeness of system function are considered.

Description

Technical Field

[0001] This utility model relates to the field of organic Rankine cycle power generation equipment, specifically to a skid-mounted ORC generator set with controllable heat source outlet temperature. Background Technology

[0002] Organic Rankine Cycle (ORC) power generation technology utilizes the low boiling point of organic working fluids to obtain high-pressure working fluid vapors at relatively low temperatures, thereby driving an expander to do work and powering a generator to generate electricity, thus realizing the utilization of medium and low temperature waste heat resources.

[0003] The main equipment of the ORC power generation system includes an evaporator that exchanges heat with a heat source to evaporate the organic working fluid, a condenser that exchanges heat with a cold source to condense the working fluid vapor, a turboexpander that expands to perform work, a working fluid pump that provides circulation power, a generator for power generation, and a matching control system. In the evaporator, the organic working fluid exchanges heat with a heat source and is heated and evaporated into high-pressure working fluid vapor. This vapor then enters the turboexpander, driving the expander to perform work and powering the generator. Subsequently, the expanded, low-pressure working fluid vapor enters the condenser and condenses into low-pressure liquid working fluid. This liquid is then pressurized by the working fluid pump and re-enters the evaporator to form a cycle.

[0004] Currently, in many large ORC generator sets, in addition to the main equipment mentioned above, components such as preheaters and regenerators are also configured to improve system performance. However, for skid-mounted ORC generator sets, due to the limitations of the overall unit size, the arrangement of unit components often needs to be compromised and simplified. The simplest way is to directly remove the corresponding components to reduce the space required for installation. Another approach is to enlarge the heat exchange area of ​​the evaporator to accommodate the function of the preheater. However, to meet the requirements of skid-mounting, the structural and quantitative limitations of component design inevitably lead to functional deficiencies. For example, in some ORC power generation scenarios, the downstream processes of users still have further requirements for the heat source cooled by ORC power generation, requiring the heat source outlet temperature to not exceed or fall below a certain range. Furthermore, some downstream processes require the adjustment and control of the cooled heat source temperature, a function that skid-mounted units often cannot achieve due to equipment layout limitations. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing skid-mounted ORC generator sets, which often simplify and omit system components in pursuit of structural compactness, omitting some functions. As a result, the heat source outlet temperature can only passively change with heat source conditions and power generation load, and cannot be actively adjusted and controlled. This makes it difficult to meet the constant temperature or temperature regulation requirements of downstream processes, thus limiting its application range. To address this deficiency, a skid-mounted ORC generator set with controllable heat source outlet temperature is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A skid-mounted ORC generator set with controllable heat source outlet temperature includes a base frame. A working fluid pump and an electrical control cabinet are installed and fixed inside the base frame. A condenser is mounted on the base frame via a top crossbeam. The working fluid pump is connected to the condenser via a working fluid pump inlet pipe. An evaporator is mounted on one side of the base frame via a support frame. The working fluid pump is connected to the evaporator via a working fluid pump outlet pipe. A turbine generator is mounted on the evaporator via a turbine support. A turbine outlet pipe is provided between the turbine generator and the condenser. The turbine generator is connected to the evaporator via a turbine inlet pipe. A working fluid distribution pipe is connected to the working fluid pump outlet pipe, and the other end of the working fluid distribution pipe is connected to the evaporator.

[0007] As a further preferred embodiment of this invention, the evaporator is a fixed tube sheet heat exchanger.

[0008] As a further preferred embodiment of this utility model, the evaporator is provided with a first partition and a second partition, which divide the interior of the evaporator into a preheating section, a liquid equalization layer and an evaporation section. Several heat exchange tubes are provided in both the preheating section and the evaporation section. The heat exchange tubes are fixed to the evaporator by a tube sheet and a support plate. A sealing plate is provided between the first partition and the second partition and is located at both ends of the liquid equalization layer to prevent the working fluid from flowing out.

[0009] As a further preferred embodiment of this utility model, the second partition has a through hole at one end, and the first partition has a plurality of small holes evenly arranged thereon.

[0010] As a further preferred embodiment of this utility model, a flow regulating valve is provided on the working fluid distribution pipeline for adjusting the heat source outlet temperature, and the liquid leveling layer of the evaporator is connected to the working fluid distribution pipeline.

[0011] As a further preferred embodiment of this utility model, the heat exchange tubes in the preheating section are configured as baffle structures, and the baffles are either single-baffle or double-baffle structures; the heat exchange tubes in the evaporation section are configured as full-liquid evaporators and are fixedly connected by a support plate.

[0012] As a further preferred embodiment of this utility model, a connecting pipeline is provided between the turbine inlet pipeline and the turbine outlet pipeline, and a turbine bypass valve is provided on the connecting pipeline for controlling the main circulation of the ORC system.

[0013] As a further preferred embodiment of this utility model, the turbine inlet pipe is disposed between the intake filter and the turbine inlet valve, one end of the connecting pipe is disposed between the intake filter and the turbine inlet valve, and the other end is connected to the turbine outlet pipe.

[0014] The skid-mounted ORC generator set with controllable heat source outlet temperature proposed in this utility model has the following advantages compared with the prior art: 1. This utility model adds a working fluid diversion pipeline with a regulating valve to the outlet of the working fluid pump and designs an integrated special structure evaporator with a preheating section, a liquid equalization layer and an evaporation section. Without significantly increasing the volume and complexity of the unit, it successfully integrates the control function of the heat source outlet temperature, taking into account both the compactness of the skid-mounted unit and the completeness of the system function. 2. This invention, by adjusting the opening of the diversion regulating valve, can precisely control the proportion of the working fluid directly entering the evaporation section, thereby actively allocating the heat exchange load between the preheating and evaporation sections, and ultimately achieving regulation of the heat source outlet temperature. This solves the key problem of traditional skid-mounted ORC units that can only passively accept changes in heat source temperature; 3. The skid-mounted ORC unit of this utility model can not only be used for simple power generation, but also can be widely applied to comprehensive energy utilization scenarios where the heat source emission temperature is required, which significantly broadens the application field of the product and enhances the market competitiveness of the customer's value product. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a side view of the present invention; Figure 3 This is another side view of the present invention; Figure 4 This is a partial schematic diagram of the working fluid diversion pipeline; Figure 5 This is a schematic side view of the working fluid diversion pipeline; Figure 6 This is a schematic diagram of the internal structure of the evaporator.

[0016] The meanings of the labels in the attached diagram are as follows: 1. Base frame; 2. Working fluid pump; 3. Working fluid distribution pipeline; 4. Electrical control cabinet; 5. Condenser; 6. Turbine generator; 61. Turbine support; 7. Evaporator; 71. Preheating section; 72. Liquid equalization layer; 73. Evaporation section; 74. First baffle; 75. Second baffle; 76. Sealing plate; 8. Working fluid pump outlet pipeline; 9. Working fluid pump inlet pipeline; 10. Distribution regulating valve; 11. Turbine inlet pipeline; 12. Turbine outlet pipeline; 13. Suction filter; 14. Turbine inlet valve; 15. Turbine bypass valve; 16. Connecting pipeline. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0018] In pursuit of compactness, existing skid-mounted ORC units often simplify and omit system components, such as preheaters or regenerators. While this satisfies space constraints, it sacrifices some functional flexibility. A prominent issue is that in many industrial applications, ORC systems serve not only for power generation but also as a crucial means of providing downstream processes with a cooled heat source at a specific, stable temperature (i.e., there are specific requirements for the heat source outlet temperature of the ORC system). Conventional skid-mounted ORC units lack effective regulation mechanisms; their heat source outlet temperature can only passively change with heat source conditions and power generation load, lacking active regulation and control. This makes it difficult to meet the constant temperature or temperature regulation requirements of downstream processes, limiting their application scope.

[0019] Example 1: Combining Figure 1-5 A skid-mounted ORC generator set with controllable heat source outlet temperature includes a base frame 1. A working fluid pump 2 and an electrical control cabinet 4 are installed and fixed inside the base frame 1. A condenser 5 is installed on the base frame 1 via a top crossbeam. The working fluid pump 2 is connected to the condenser 5 via a working fluid pump inlet pipe 9. An evaporator 7 is installed on one side of the base frame 1 via a support frame. The working fluid pump 2 is connected to the evaporator 7 via a working fluid pump outlet pipe 8. A turbine generator 6 is installed on the evaporator 7 via a turbine support 61. A turbine outlet pipe 12 is provided between the turbine generator 6 and the condenser 5. The turbine generator 6 is connected to the evaporator 7 via a turbine inlet pipe 11. A working fluid distribution pipe 3 is connected to the working fluid pump outlet pipe 8, and the other end of the working fluid distribution pipe 3 is connected to the evaporator 7.

[0020] As a further preferred embodiment of this utility model, the evaporator 7 is a fixed tube sheet heat exchanger.

[0021] In this invention, the turbine inlet pipe 11 is fitted with an intake filter 13 and a turbine inlet valve 14. A connecting pipe 16 is provided between the turbine inlet pipe 11 and the turbine outlet pipe 12, and a turbine bypass valve 15 is provided on the connecting pipe 16 for controlling the main circulation of the ORC system. One end of the connecting pipe 16 is located between the intake filter 13 and the turbine inlet valve 14, and the other end is connected to the turbine outlet pipe 12. Pipelines between adjacent devices are fixed by flanges.

[0022] In this invention, the evaporator 7 is internally equipped with a first partition 74 and a second partition 75. The second partition 75 and the first partition 74 divide the interior of the evaporator 7 into a preheating section 71, a liquid equalization layer 72, and an evaporation section 73. Both the preheating section 71 and the evaporation section 73 are equipped with several heat exchange tubes, which are fixed to the evaporator 7 by a tube sheet and a support plate. A sealing plate is provided between the first partition 74 and the second partition 75, located at both ends of the liquid equalization layer 72, to prevent the working fluid from flowing out. One end of the second partition 75 has a through hole, and the first partition 74 has several small holes evenly distributed on it. The heat exchange tubes in the preheating section 71 are configured as baffles, which can be single or double baffles. The heat exchange tubes in the evaporation section 73 are configured as a full-liquid evaporator 7 structure, fixedly connected by a support plate. Figure 6 As shown.

[0023] The working fluid distribution pipeline 3 is equipped with a flow regulating valve 10 for regulating the heat source outlet temperature, and the liquid leveling layer 72 of the evaporator 7 is connected to the working fluid distribution pipeline 3.

[0024] Working principle: Most of the working fluid flows out from the working fluid pump 2, enters the evaporator 7 through the working fluid pump outlet pipe 8, then enters the turbine generator 6 through the turbine inlet pipe 11, flows into the condenser 5 through the turbine outlet pipe 12, and then flows back into the working fluid pump 2 through the working fluid pump inlet pipe 9, forming a working fluid loop; another part of the working fluid is diverted, enters the working fluid diversion pipe 3 from the working fluid pump outlet pipe 8, then bypasses the preheating section 71 and directly enters the liquid equalization layer 72, realizing the adjustment of the heat exchange load ratio between the preheating section 71 and the subsequent evaporation section 73, thereby realizing the adjustment and control of the heat source outlet temperature.

[0025] Electrical control cabinet 4 is responsible for controlling all electrical equipment, valves, and instruments, including turbine generator 6, working fluid pump 2, turbine inlet valve 14, turbine bypass valve 15, flow control valve 10, and all instrument measuring points in the system (not shown in the figure). All controlled equipment and instruments are connected to electrical control cabinet 4 via cables.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A skid-mounted ORC generator set with controllable heat source outlet temperature, comprising a base frame (1), characterized in that, The working fluid pump (2) and the electrical control cabinet (4) are installed and fixed inside the bottom frame (1). The condenser (5) is installed on the bottom frame (1) through the top crossbeam. The working fluid pump (2) is connected to the condenser (5) through the working fluid pump inlet pipe (9). The evaporator (7) is installed on one side of the bottom frame (1) through the support frame. The working fluid pump (2) is connected to the evaporator (7) through the working fluid pump outlet pipe (8). The turbine generator (6) is installed on the evaporator (7) through the turbine support (64). The turbine generator (6) is connected to the condenser (5) through the turbine outlet pipe (12). The turbine generator (6) is connected to the evaporator (7) through the turbine inlet pipe (11). The working fluid distribution pipe (3) is connected to the working fluid pump outlet pipe (8). The other end of the working fluid distribution pipe (3) is connected to the evaporator (7).

2. The skid-mounted ORC generator set with controllable heat source outlet temperature according to claim 1, characterized in that, The evaporator (7) is a fixed tube sheet heat exchanger.

3. A skid-mounted ORC generator set with controllable heat source outlet temperature according to claim 1, characterized in that, The evaporator (7) is provided with a first partition (74) and a second partition (75). The second partition (75) and the first partition (74) divide the interior of the evaporator (7) into a preheating section (71), a liquid equalization layer (72) and an evaporation section (73). Several heat exchange tubes are provided in both the preheating section (71) and the evaporation section (73). The heat exchange tubes are fixed to the evaporator (7) by tube sheet and support plate. A sealing plate is provided between the first partition (74) and the second partition (75) and is located at both ends of the liquid equalization layer (72) to prevent the working fluid from flowing out.

4. A skid-mounted ORC generator set with controllable heat source outlet temperature according to claim 3, characterized in that, The second partition (75) has a through hole at one end, and the first partition (74) has several small holes evenly arranged on it.

5. A skid-mounted ORC generator set with controllable heat source outlet temperature according to claim 3, characterized in that, A flow control valve (10) is provided on the working fluid distribution pipeline (3), and the liquid leveling layer (72) of the evaporator (7) is connected to the working fluid distribution pipeline (3).

6. A skid-mounted ORC generator set with controllable heat source outlet temperature according to claim 3, characterized in that, The heat exchange tubes in the preheating section (71) are configured as baffle structures, and the baffles are either single-baffle or double-baffle structures; the heat exchange tubes in the evaporation section (73) are configured as full-liquid evaporators (7) and are fixedly connected by a support plate.

7. A skid-mounted ORC generator set with controllable heat source outlet temperature according to claim 1, characterized in that, A connecting pipe (16) is provided between the turbine inlet pipe (11) and the turbine outlet pipe (12), and a turbine bypass valve (15) is provided on the connecting pipe.

8. A skid-mounted ORC generator set with controllable heat source outlet temperature according to claim 7, characterized in that, The turbine inlet pipe (11) is equipped with an air intake filter (13) and a turbine inlet valve (14). One end of the connecting pipe (16) is located between the air intake filter (13) and the turbine inlet valve (14), and the other end is connected to the turbine outlet pipe (12).

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