A condensate water system with an automatic temperature regulation function and its working method

Abstract

The present invention discloses a condensate water system with automatic temperature regulation function and a working method thereof, comprising a condensate water pump inlet door, a condensate water pump, a hot water inlet door, a waste hot water inlet door, an absorption heat pump, a heat source outlet door, a heat source inlet door, a waste hot water outlet door, a hot water outlet door, a heater, a heater outlet door and an exhaust device; after the working condensate water in the system is separated into cold and hot condensate by the heat pump technology, the hot condensate water enters the heater for energy transfer, and the condensed condensate returns to the interior of the exhaust device for mixed heat exchange, and the condensate water temperature in the exhaust device is controlled by controlling the flow rate of the condensed water, thereby controlling the exhaust pressure or back pressure of the exhaust device, and finally achieving the purpose of solving the problem of the exhaust pressure or back pressure boundary parameter condition limitation of the unit's load capacity, so that the unit can operate more safely and economically under extremely hot weather conditions.

Description

Technical Field

[0001] The invention relates to a condensate water system, in particular to a condensate water system with an automatic temperature regulation function and a working method thereof. Background Art

[0002] Influenced by unit capacity and local environmental conditions, thermal power generation units typically utilize direct or indirect air cooling systems during construction, depending on the unit's cold-end cooling device. During variable-load operation, units are subject to extreme weather conditions, primarily due to factors such as ambient temperature, wind direction, and wind speed. This results in the unit's load-carrying capacity being affected by boundary parameters such as exhaust pressure and back pressure, thereby limiting the unit's load-carrying capacity. To address this issue, common practices include cold-end waste heat utilization, high back pressure, cylinder trimming, and peak cooling. These methods reduce, recycle, or discharge cold-end heat through primary and secondary heat networks or peak cooling systems, ultimately achieving exhaust pressure or back pressure well within the boundary parameters and ensuring the unit's load-carrying capacity. Conventional condensing units, however, are affected by a variety of factors and lack the conditions for primary and secondary heat networks and peak cooling system modifications. Furthermore, cold-end heat discharge is detrimental to the unit's safe and economical operation. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a condensate water system with automatic temperature regulation function and a working method thereof, which is not affected by the modification conditions of the primary and secondary heating network systems and the peak cooling system. It can not only effectively solve the limitation of the exhaust pressure or back pressure boundary parameter conditions on the load capacity of the unit, but also make the operation of the unit safer and more economical under extremely hot weather conditions.

[0004] The technical solution adopted by the present invention to solve the above-mentioned problem is: a condensate water system with automatic temperature adjustment function, characterized in that it includes a condensate water pump inlet door, a condensate water pump, a hot water inlet door, a waste hot water inlet door, an absorption heat pump, a heat source outlet door, a heat source inlet door, a waste hot water outlet door, a hot water outlet door, a heater, a heater outlet door and an exhaust device; the exhaust device is connected to the inlet of the condensate water pump through the condensate water pump inlet door, the outlet of the condensate water pump is connected to the absorption heat pump through the hot water inlet door and the waste hot water inlet door respectively, the hot water inlet door and the waste hot water inlet door are arranged in parallel, the heat source inlet door is connected to the heat source inlet of the absorption heat pump, the heat source outlet door is connected to the heat source outlet of the absorption heat pump, the waste hot water outlet of the absorption heat pump is connected to the exhaust device through the waste hot water outlet door, the hot water outlet of the absorption heat pump is connected to the water inlet of the heater through the hot water outlet door, and the heater outlet door is connected to the water outlet of the heater.

[0005] The medium sucked into the condensate pump enters the absorption heat pump through the hot water inlet door and the waste hot water inlet door. The medium cooled by the absorption heat pump enters the exhaust device through the waste hot water outlet door for mixed heat exchange, thereby achieving condensate temperature control in the exhaust device. The medium heated by the absorption heat pump enters the heater through the hot water outlet door for energy transfer.

[0006] The same condensate is used as both the waste hot water source and the hot water source of the absorption heat pump. The low-temperature waste hot water after heat dissipation enters the exhaust device for mixed heat exchange. The temperature of the condensate in the exhaust device is used as the regulated variable, and the opening control of the waste hot water inlet door is used as the regulation method to achieve automatic regulation of the condensate temperature in the exhaust device.

[0007] After the working condensate in the system of the present invention is separated into hot and cold condensate by heat pump technology, the hot condensate enters the heater for energy transfer, and the condensed condensate returns to the interior of the exhaust device for mixed heat exchange. The flow rate of the condensed water is controlled to achieve the control of the condensate temperature in the exhaust device, thereby achieving the control of the exhaust pressure or back pressure of the exhaust device, and ultimately achieving the purpose of solving the problem of the exhaust pressure or back pressure boundary parameter conditions limiting the load capacity of the unit.

[0008] Working methods:

[0009] (1) Start-up operating conditions

[0010] When the condensate system is started, the condensate system water circulation is first established. The condensate in the exhaust device is sucked in and discharged into the absorption heat pump by starting the condensate pump, and then energy is transferred through the heater. Then the working heat source and waste hot water are introduced, and the absorption heat pump is started. After the absorption heat pump starts working, the condensate is separated into hot and cold, the hot condensate enters the heater for energy transfer, and the condensed condensate returns to the exhaust device for mixed heat exchange. The startup and operation of the condensate system are completed.

[0011] (2) Stop operating conditions

[0012] When the condensate water system stops, first exit the working heat source and waste hot water, and stop the absorption heat pump; then close the hot water inlet door and the hot water outlet door, stop the condensate water pump, and the condensate water system stops running.

[0013] (3) Automatic adjustment of operating conditions

[0014] When the condensate system is automatically adjusted and operated, first, after the condensate system is started and operated, the condensate temperature in the exhaust device is used as the controlled variable, the condensate temperature setting value in the exhaust device is used as the target value, and the opening control of the waste hot water inlet door is used as the main means to perform PID positive action adjustment.

[0015] Compared with the prior art, the present invention has the following advantages and effects:

[0016] (1) The present invention can effectively reduce the temperature of condensed water in the exhaust device by mixed heat exchange under extremely hot weather conditions, and adjust the exhaust pressure or back pressure in the exhaust device, which can effectively solve the limitation of the exhaust pressure or back pressure boundary parameter conditions on the load capacity of the unit, making the operation of the unit safer and more economical under extremely hot weather conditions.

[0017] (2) The present invention can solve the problem of limited load carrying capacity of the unit under extremely hot weather conditions, and is no longer subject to restrictions such as cold end waste heat utilization modification, high back pressure modification, cylinder cutting modification and peak cooling modification.

[0018] (3) During use, the present invention can effectively prevent waste of working fluid, save energy and protect the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the system structure of the present invention.

[0020] In the figure: condensate pump inlet door 1, condensate pump 2, hot water inlet door 3, waste hot water inlet door 4, absorption heat pump 5, heat source outlet door 6, heat source inlet door 7, waste hot water outlet door 8, hot water outlet door 9, heater 10, heater outlet door 11, and exhaust device 12. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0022] Example

[0023] See also Figure 1 In this embodiment, a condensate water system with an automatic temperature adjustment function includes a condensate water pump inlet door 1, a condensate water pump 2, a hot water inlet door 3, a waste hot water inlet door 4, an absorption heat pump 5, a heat source outlet door 6, a heat source inlet door 7, a waste hot water outlet door 8, a hot water outlet door 9, a heater 10, a heater outlet door 11 and an exhaust device 12; the exhaust device 12 is connected to the inlet of the condensate water pump 2 through the condensate water pump inlet door 1, the outlet of the condensate water pump 2 is connected to the absorption heat pump 5 through the hot water inlet door 3 and the waste hot water inlet door 4 respectively, the hot water inlet door 3 and the waste hot water inlet door 4 are arranged in parallel, the heat source inlet door 7 is connected to the heat source inlet of the absorption heat pump 5, the heat source outlet door 6 is connected to the heat source outlet of the absorption heat pump 5, the waste hot water outlet of the absorption heat pump 5 is connected to the exhaust device 12 through the waste hot water outlet door 8, the hot water outlet of the absorption heat pump 5 is connected to the water inlet of the heater 10 through the hot water outlet door 9, and the heater outlet door 11 is connected to the water outlet of the heater 10.

[0024] Working methods:

[0025] 1. Start operation

[0026] Please follow the steps below.

[0027]

[0028]

[0029] 2. Stop running

[0030] Please follow the steps below.

[0031]

[0032]

[0033] 3. Automatic adjustment operation is carried out according to the following steps.

[0034]

[0035]

[0036] The contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0037] Although the present invention has been disclosed above with reference to the embodiments, it is not intended to limit the scope of protection of the present invention. Any changes and modifications made by any technician familiar with the technology without departing from the concept and scope of the present invention should fall within the scope of protection of the present invention.

Claims

1. A condensate water system with automatic temperature regulation function, characterized in that: The invention comprises a condensate pump inlet door (1), a condensate pump (2), a hot water inlet door (3), a waste hot water inlet door (4), an absorption heat pump (5), a heat source outlet door (6), a heat source inlet door (7), a waste hot water outlet door (8), a hot water outlet door (9), a heater (10), a heater outlet door (11) and a steam exhaust device (12); the steam exhaust device (12) is connected to the inlet of the condensate pump (2) via the condensate pump inlet door (1), and the outlet of the condensate pump (2) is connected to the absorption heat pump via the hot water inlet door (3) and the waste hot water inlet door (4). (5) is connected, the hot water inlet door (3) and the waste hot water inlet door (4) are arranged in parallel, the heat source inlet door (7) is connected to the heat source inlet of the absorption heat pump (5), the heat source outlet door (6) is connected to the heat source outlet of the absorption heat pump (5), the waste hot water outlet of the absorption heat pump (5) is connected to the exhaust device (12) via the waste hot water outlet door (8), the hot water outlet of the absorption heat pump (5) is connected to the water inlet of the heater (10) via the hot water outlet door (9), and the heater outlet door (11) is connected to the water outlet of the heater (10); The medium sucked into the condensate pump (2) enters the absorption heat pump (5) through the hot water inlet door (3) and the waste hot water inlet door (4). The medium cooled by the absorption heat pump (5) enters the exhaust device (12) through the waste hot water outlet door (8) for mixed heat exchange, thereby controlling the temperature of the condensate in the exhaust device (12). The medium heated by the absorption heat pump (5) enters the heater (10) through the hot water outlet door (9) for energy transfer. The same condensed water is used as both a waste hot water source and a hot water source for the absorption heat pump (5). The low-temperature waste hot water after heat dissipation enters the exhaust device (12) for mixed heat exchange. The temperature of the condensed water in the exhaust device (12) is used as the regulated variable, and the opening control of the waste hot water inlet door (4) is used as the regulating means to realize automatic regulation of the temperature of the condensed water in the exhaust device (12).

2. The condensate water system with automatic temperature regulation function according to claim 1 is characterized in that: After the working condensate in the system is separated into hot and cold condensate by heat pump technology, the hot condensate enters the heater (10) for energy transfer, and the condensate returns to the exhaust device (12) for mixed heat exchange. The flow rate of the condensate is controlled to achieve the control of the condensate temperature in the exhaust device (12), thereby achieving the control of the exhaust pressure or back pressure of the exhaust device (12), and ultimately achieving the purpose of solving the problem of the exhaust pressure or back pressure boundary parameter conditions limiting the load capacity of the unit.

3. A method for operating a condensate water system with automatic temperature regulation function according to claim 1 or 2, characterized in that the process as follows: (1) Start-up operating conditions When the condensate system is started, the water circulation of the condensate system is first established, and the condensate in the exhaust device (12) is sucked in and discharged to the absorption heat pump (5) by starting the condensate pump (2), and then energy is transferred through the heater (10); then the working heat source is introduced, the waste hot water is introduced, and the absorption heat pump (5) is started. After the absorption heat pump (5) starts working, the condensate is separated into cold and hot water, the hot condensate enters the heater (10) for energy transfer, and the condensed condensate returns to the exhaust device (12) for mixed heat exchange, and the condensate system is started and operated. (2) Stop operating conditions When the condensate water system stops, the working heat source and waste hot water are first withdrawn, and the absorption heat pump (5) is stopped; then the hot water inlet door (3) and the hot water outlet door (9) are closed, and the condensate water pump (2) is stopped, and the condensate water system is stopped. (3) Automatic adjustment of operating conditions When the condensate system is automatically adjusted and operated, first, after the condensate system is started and operated, the condensate temperature in the exhaust device (12) is used as the controlled variable, and the condensate temperature setting value in the exhaust device (12) is used as the target value. The opening control of the waste hot water inlet door (4) is used as the main means to perform PID positive action adjustment.

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