Condensate recovery and recycling device

Abstract

The present invention discloses a condensate recovery and reuse device, wherein the air inlet nozzle of a heat exchanger is connected to the air outlet pipe through a gate valve, the condensate outlet pipe of the heat exchanger is connected to the condensate inlet pipe and the original condensate outlet pipe respectively through a tee and two gate valves, one end of the outlet pipe is also connected to the steam outlet end of an adjustable steam jet pump, one end of the condensate inlet pipe is connected to a steam-water separator, the top of the steam-water separator is connected to a return steam pipe, the return steam pipe is connected to the return air end of the adjustable steam jet pump through a return steam pneumatic regulating valve and a matching pipeline, the remote pressure gauge is electrically connected to the return air pneumatic regulating valve of the DCS central control to realize linkage and remote control, the present invention maximizes the recovery of the secondary usable heat source of the condensate by utilizing the thermal energy in the condensate, effectively reduces the use of steam, reduces the production cost of the enterprise, and at the same time avoids the direct discharge of untreated high-temperature condensate and avoids waste of resources.

Description

Technical Field

[0001] The present invention relates to the technical field of steam recycling, in particular to a condensate recovery and recycling device. Background Art

[0002] Due to rising energy prices, domestic coal prices have also risen sharply. Saving energy and reducing business costs are key. However, many businesses generate significant emissions during steam production due to process factors, resulting in significant energy loss and waste. Condensate recovery is crucial. With increasing awareness of energy conservation and environmental protection, the perception of condensate is changing. Once considered a cheap byproduct of steam transmission, condensate is now considered a valuable resource thanks to the application of condensate recovery technology. Condensate produced by steam at different pressures contains different amounts of heat. The higher the steam pressure, the greater the heat energy contained in the condensate, resulting in a considerable inherent energy content. Statistics show that the heat content of condensate can account for 15% to 30% of the total heat content of steam. Due to the high temperature and chemical content of condensate, discharging untreated condensate directly can harm the environment and threaten personal safety, which is inconsistent with the requirements of green development. Summary of the Invention

[0003] (1) Technical problems solved

[0004] In view of the shortcomings of the existing technology, the present invention provides a condensate recovery and reuse device, which solves the problem that steam cannot be recycled for a second time.

[0005] (2) Technical solution

[0006] The present invention provides the following technical solution: a condensate recovery and reuse device, comprising a heat exchanger connected to an adjustable steam jet pump, the air inlet nozzle of the heat exchanger being connected to the air outlet pipe through a gate valve, the condensate outlet pipe of the heat exchanger being connected to the condensate inlet pipe and the original condensate outlet pipe respectively through a tee and two gate valves, one end of the outlet pipe is also connected to the steam outlet end of the adjustable steam jet pump, one end of the condensate inlet pipe is connected to a steam-water separator, the top of the steam-water separator is connected to a return steam pipe, the return steam pipe is connected to the return air end of the adjustable steam jet pump through a return steam pneumatic regulating valve and a pipeline, a remote pressure gauge is electrically connected to the DCS central control and connected to the return steam pneumatic regulating valve to achieve linkage and remote control, the remote pressure gauge is connected to the interior of the steam-water separator through a pipeline and a gate valve, and a remote magnetic flap level gauge connected to the interior of the steam-water separator is installed on the side of the steam-water separator.

[0007] Preferably, the outlet pipe is also connected to a high-pressure steam intake main pipe through a gate valve, the high-pressure steam intake main pipe is connected to a high-pressure intake branch pipe through a gate valve, and the high-pressure intake branch pipe is connected to the intake end of the adjustable steam jet pump through a gate valve.

[0008] Preferably, the top air inlet of the steam-water separator is connected to the first high-temperature condensate pipe and the second high-temperature condensate pipe provided with exhaust gas discharge respectively through two gate valves.

[0009] Preferably, the remote magnetic flap level gauge is also connected to the condensate pneumatic regulating valve via an electrical connection to the DCS central control and is connected to the condensate outlet main pipe. One end of the condensate outlet main pipe is connected to the condensate outlet of the steam-water separator, and the middle part of the condensate outlet main pipe is also connected to one end of the original condensate outlet pipe.

[0010] Preferably, the condensate outlet pipe is equipped with a condensate pneumatic regulating valve and two gate valves, and a bypass valve is installed on the condensate outlet pipe to communicate with the bypass pipe.

[0011] Preferably, the air outlet pipe is connected to the condensate return port of the steam-water separator through an adjustable steam jet pump.

[0012] Preferably, the pipes used for communication are all installed with instruments for detecting temperature and pressure.

[0013] Preferably, the remote pressure gauge and remote magnetic flap level gauge are both connected to the external control terminal DCS control system to control the electrical connection of the return steam pneumatic regulating valve, the condensate pneumatic regulating valve and the adjustable steam jet pump.

[0014] (3) Beneficial effects

[0015] Compared with the prior art, the present invention provides a condensate recovery and reuse device with the following beneficial effects:

[0016] 1. This condensate recovery and reuse device can separate the incoming high-temperature water into water and gas through the steam-water separator. After the tank expands, the pressure drops, generating flash steam in the tank. This not only filters the water but also purifies the gas. The adjustable steam jet pump converts the potential energy of high-pressure steam into high-speed kinetic energy through the nozzle, and drives and attracts low-pressure steam to be fully mixed in the jet pump mixing section, where it decelerates and increases the pressure to form high-pressure steam for production needs, thus reducing steam usage. The return steam pneumatic regulating valve installed between the steam-water separator and the adjustable steam jet pump can control the pressure and outlet water temperature of the steam-water separator, facilitating steam recovery.

[0017] 2. The condensate recovery and reuse device maximizes the recovery of the secondary heat source of the condensed water by utilizing the heat energy in the condensed water, effectively reduces the use of steam, reduces the production cost of the enterprise, and avoids the direct discharge of untreated high-temperature condensed water and avoids waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a condensate recovery and reuse device proposed in the present invention.

[0019] In the figure: 1. Heat exchanger; 11. Air outlet pipe; 12. Condensate inlet pipe; 13. Raw condensate outlet pipe; 14. Condensate outlet pipe; 2. Adjustable steam jet pump; 21. Steam outlet end; 22. Return air end; 23. Air inlet end; 3. Steam-water separator; 30. Condensate pneumatic regulating valve; 31. Return steam pipe; 32. Return steam pneumatic regulating valve; 33. Remote pressure gauge; 34. Remote magnetic flap level gauge; 35. Condensate outlet main pipe; 36. First high-temperature condensate pipe; 37. Second high-temperature condensate pipe; 38. Bypass pipe; 39. Bypass valve; 4. High-pressure steam inlet main pipe; 41. High-pressure inlet branch pipe. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort shall fall within the scope of protection of the present invention.

[0021] See also Figure 1 , a structural schematic diagram of a condensate recovery and reuse device, comprising a heat exchanger 1 connected to an adjustable steam jet pump, the air inlet nozzle of the heat exchanger 1 being connected to the air outlet pipe 11 through a gate valve, the condensate outlet pipe of the heat exchanger 1 being connected to the condensate inlet pipe 12 and the original condensate outlet pipe 13 respectively through a tee and two gate valves, one end of the air outlet pipe 11 is also connected to the steam outlet end 21 of the adjustable steam jet pump 2, one end of the condensate inlet pipe 12 is connected to a steam-water separator 3, the top of the steam-water separator 3 is connected to a return steam pipe 31, the return steam pipe 31 is connected to the return air end 22 of the adjustable steam jet pump 2 through a return steam pneumatic regulating valve 32 and a pipeline, a remote pressure gauge 33 is electrically connected to the DCS central control and connected to the return air pneumatic regulating valve to achieve linkage and remote control, the remote pressure gauge 33 is connected to the interior of the steam-water separator 3 through a pipeline and a gate valve, and a remote magnetic flap level gauge 34 is installed on the side of the steam-water separator 3 and is connected to the interior of the steam-water separator 3.

[0022] Furthermore, the outlet pipe 11 is also connected to a high-pressure steam inlet main pipe 4 through a gate valve, and the high-pressure steam inlet main pipe 4 is connected to a high-pressure inlet branch pipe 41 through a gate valve. The high-pressure inlet branch pipe 41 is connected to the inlet end 23 of the adjustable steam jet pump 2 through a gate valve, so that the steam required to generate the heat exchanger 1 can be input into the interior of the heat exchanger 1 through the high-pressure steam inlet main pipe 4 or the outlet pipe 11 respectively.

[0023] Furthermore, the top air inlet of the steam-water separator 3 is connected to the first high-temperature condensate pipe 36 and the second high-temperature condensate pipe 37 for exhaust gas discharge through two gate valves, so that the external steam exhaust gas can enter the interior of the steam-water separator 3 through the first high-temperature condensate pipe 36 and the second high-temperature condensate pipe 37.

[0024] Furthermore, the remote magnetic flap level gauge 34 is also electrically connected to the DCS central control connection condensate pneumatic regulating valve 30 and is connected to the condensate outlet main pipe 35. One end of the condensate outlet main pipe 35 is connected to the condensate outlet of the steam-water separator 3, and the middle part of the condensate outlet main pipe 35 is also connected to one end of the original condensate outlet pipe 13, so that the condensate generated by the heat exchanger 1 and the steam-water separator 3 can be discharged through the condensate outlet main pipe 35.

[0025] Furthermore, the condensate outlet pipe 14 is equipped with a condensate pneumatic regulating valve 30 and two gate valves. A bypass valve 39 is installed on the condensate outlet pipe 14 and is connected to the bypass pipe 38, which can control the condensate discharge of the steam-water separator 3 and the heat exchanger 1 respectively.

[0026] Furthermore, the air outlet pipe 11 is connected to the condensate return port of the steam-water separator 3 through the adjustable steam jet pump 2 , so that the condensate generated by the heat exchanger 1 enters the interior of the steam-water separator 3 through the condensate inlet pipe 12 .

[0027] Furthermore, the pipes used for communication are all installed with instruments for detecting temperature and pressure, and the temperature and pressure in the pipes can be monitored in real time through the installed instruments.

[0028] Furthermore, the remote pressure gauge 33 and the remote magnetic flap level gauge 34 are both connected to the external control terminal DCS control system to control the electrical connection of the return steam pneumatic control valve 32, the condensate pneumatic control valve 30 and the adjustable steam jet pump 2. The DCS control system of the control terminal can be used to control the return steam pneumatic control valve 32, the condensate pneumatic control valve 30 and the adjustable steam jet pump 2 respectively.

[0029] When using, when using, such as Figure 1As shown, the first high-temperature condensate pipe 36 and the second high-temperature condensate pipe 37 for high-temperature exhaust steam discharge are connected to the top air inlet of the steam-water separator 3 through two gate valves to realize the collection of exhaust steam; the steam inlet of the adjustable steam jet pump 2 is connected to the high-pressure steam inlet main pipe 4 in conjunction with the gate valve, and the return air end 22 of the adjustable steam jet pump 2 is connected to the return steam pipe 31 connected to the steam-water separator 3, and a return steam pneumatic regulating valve 32 with a model "XV02" is installed on the return steam pipe 31. A remote pressure gauge 33 with a model "PG02" is installed on the steam-water separator 3 using a pipeline in conjunction with a gate valve. Through the installed remote pressure gauge 33, personnel can control the remote pressure gauge 33 through the control terminal for interlocking automatic control; a model "L The remote magnetic flap level gauge 34 of "ICA02" can be interlocked with the condensate pneumatic regulating valve 30 under the control of the control terminal. At the same time, the condensate inlet of the steam-water separator 3 is also connected to the high-temperature condensate discharge port of the heat exchanger 1 through a pipeline and a gate valve. The high-temperature condensate discharged from the heat exchanger 1 enters the steam-water separator 3 through the condensate inlet pipe 12 and its pressure is reduced, and it will become a part of saturated water and saturated steam. This part of steam will be directly drawn into the interior of the adjustable steam jet pump 2 through the return steam pipe 31. The adjustable steam jet pump 2 converts the potential energy of the high-pressure steam injected from the high-pressure intake branch pipe 41 into high-speed kinetic energy through the nozzle, attracting the low-pressure steam entering the interior to be fully mixed in the mixing section of the jet pump. After being fully mixed with the low-pressure saturated steam, high-pressure reusable steam is formed;

[0030] Furthermore, the condensed water formed by the treated exhaust gas and the condensed water formed by the heat exchanger 1 can be discharged through the condensate outlet main pipe 35 to avoid direct discharge.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0032] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A condensate recovery and reuse device, comprising a heat exchanger (1) connected to an adjustable steam jet pump, characterized in that: The air inlet of the heat exchanger (1) is connected to the air outlet pipe (11) through a gate valve, and the condensate outlet pipe of the heat exchanger (1) is connected to the condensate inlet pipe (12) and the original condensate outlet pipe (13) respectively through a tee and two gate valves. One end of the air outlet pipe (11) is also connected to the steam outlet end (21) of the adjustable steam jet pump (2). One end of the condensate inlet pipe (12) is connected to a steam-water separator (3), and the top of the steam-water separator (3) is connected to a steam return pipe. (31), the return steam pipe (31) is connected to the return air end (22) of the adjustable steam jet pump (2) through a return steam pneumatic regulating valve (32) and a matching pipeline, and a remote pressure gauge (33) is connected to the return air pneumatic regulating valve through an electrical connection to the DCS central control to achieve linkage and remote control, and the remote pressure gauge (33) is connected to the interior of the steam-water separator (3) through a matching gate valve through a pipeline, and a remote magnetic flap level gauge (34) connected to the interior of the steam-water separator (3) is installed on the side of the steam-water separator (3); The outlet pipe (11) is also connected to a high-pressure steam intake manifold (4) through a gate valve, and the high-pressure steam intake manifold (4) is connected to a high-pressure intake branch pipe (41) through a gate valve, and the high-pressure intake branch pipe (41) is connected to the intake end (23) of the adjustable steam jet pump (2) through a gate valve; The top air inlet of the steam-water separator (3) is connected to a first high-temperature condensate pipe (36) and a second high-temperature condensate pipe (37) for exhaust gas discharge respectively through two gate valves; The remote magnetic flap level gauge (34) is also connected to the condensate pneumatic regulating valve (30) of the DCS central control via an electrical connection and is in communication with the condensate outlet main pipe (35). One end of the condensate outlet main pipe (35) is in communication with the condensate outlet of the steam-water separator (3). The middle portion of the condensate outlet main pipe (35) is also in communication with one end of the original condensate outlet pipe (13).

2. The condensate recovery and reuse device according to claim 1, characterized in that: Also includes: The condensate outlet pipe (14) is provided with a condensate pneumatic regulating valve (30) and two gate valves. A bypass valve (39) is provided on the condensate outlet pipe (14) and is communicated with the bypass pipe (38).

3. The condensate recovery and reuse device according to claim 1, characterized in that: The air outlet pipe (11) is connected to the condensate return port of the steam-water separator (3) through an adjustable steam jet pump (2).

4. The condensate recovery and reuse device according to claim 1, characterized in that: The pipes used for communication are all equipped with instruments for detecting temperature and pressure.

5. The condensate recovery and reuse device according to claim 4, characterized in that: The remote pressure gauge (33) and the remote magnetic flap level gauge (34) are both connected to the external control terminal DCS control system, and control the electrical connection between the steam return pneumatic regulating valve (32), the condensate pneumatic regulating valve (30) and the adjustable steam jet pump (2).

Images