Vacuum salt-making condensate water recovery and comprehensive utilization equipment

Abstract

The utility model discloses vacuum salt-making condensate water recovery and comprehensive utilization equipment, and belongs to the technical field of thermodynamic systems. Comprising a vacuum salt manufacturing device, a deaerator, a primary fan air heater, a secondary fan air heater, a heating water tank and a circulating water pool. Condensed water recovered by the vacuum salt manufacturing device is supplied to the outside through a high-temperature condensed water pipeline, and is connected with a deaerator, a primary fan air heater and a secondary fan air heater through a deaerator condensed water pipeline, an air heater bypass pipeline, a primary fan air heater water inlet pipeline and a secondary fan air heater water inlet pipeline; and low-temperature water after heat exchange and cooling is conveyed to the heating water tank and the circulating water pool through the heating pipeline and the circulating water pool pipeline to be used as replenished water. The problems of low waste heat utilization efficiency and low water circulation utilization rate of the salt-making condensate water at present are solved.

Description

Technical Field

[0001] The utility model relates to a condensed water recovery method, in particular to a vacuum salt making condensed water recovery and comprehensive utilization device. Background Art

[0002] Currently, vacuum salt production condensate is typically recycled as deaerator feed water in boiler feed systems. This utilizes the working fluid and the heat it carries, reducing desalted water usage and deaerator heating steam consumption. Excess condensate is discharged to the wastewater system and injected into the salt well for reuse. Utility Model Content

[0003] In response to the shortcomings of the existing technology, the utility model provides a vacuum salt production condensate water recovery and comprehensive utilization equipment. By using the excess high-temperature condensate water to heat the cold air entering the boiler air preheater, the inlet air temperature of the boiler air preheater can be increased, thereby reducing the boiler coal consumption, achieving the effect of energy conservation, emission reduction and environmental protection.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a vacuum salt making condensate water recovery and comprehensive utilization device, including a vacuum salt making device, a deaerator, a primary fan heater, a secondary fan heater, a heating water tank and a circulating water pool;

[0005] The condensed water recovered by the vacuum salt making device is supplied to the outside through a high-temperature condensed water pipeline. The high-temperature condensed water pipeline is connected to the deaerator condensed water pipeline, the heater bypass pipeline, the primary fan heater water inlet pipeline, and the secondary fan heater water inlet pipeline in sequence through a three-way joint.

[0006] Furthermore, an electric regulating valve is provided on the high-temperature condensate water pipeline, the deaerator condensate water pipeline is connected to the deaerator, and an electric regulating valve is provided on the deaerator condensate water pipeline.

[0007] The heater bypass pipe is connected to the low-temperature condensate pipe, a shut-off valve is provided on the heater bypass pipe, the primary fan heater water inlet pipe is connected to the primary fan heater, the secondary fan heater water inlet pipe is connected to the secondary fan heater, and the low-temperature water pipes at the outlets of the primary fan heater and the secondary fan heater are respectively connected to the low-temperature condensate pipe.

[0008] The low-temperature condensed water pipeline is respectively connected to the heating water tank pipeline and the circulating water pool pipeline. The heating water tank pipeline is connected to the heating water tank, and the circulating water pool pipeline is connected to the circulating water pool.

[0009] The low-temperature water at the heater outlet can also be used as water to replenish the heating water tank and circulating water pool, realizing water recycling and reducing the use of fresh water.

[0010] In addition, low-temperature water can improve the scaling problem of heating systems and circulating water systems. The circulating water system no longer needs to add circulating water scale inhibitors, saving the cost of using chemicals, etc., and solving the current problem of insufficient recycling of vacuum salt production condensate water.

[0011] Furthermore, the vacuum salt making device recovers the 104°C high-temperature condensate water after condensation of saturated steam, pressurizes it to 0.5MPa and sends it to the high-temperature condensate pipeline, thereby saving water resources.

[0012] Furthermore, the primary fan heater and the secondary fan heater are both S-shaped fin heaters, which are respectively arranged at the horizontal outlet sections of the primary fan and the secondary fan. Hot water flows from top to bottom through the tube side of the heater. The outer side of the tube side is welded with multi-layer S-shaped fins, which help to dissipate heat.

[0013] Furthermore, the water inlet pipe of the primary fan heater and the water inlet pipe of the secondary fan heater are respectively provided with a stop valve, the low-temperature water pipes at the outlet of the primary fan heater and the secondary fan heater are respectively provided with a stop valve, and the heating water tank pipe and the circulating water pool pipe are respectively provided with a stop valve. The stop valves facilitate the control of the on and off of the warm air in each pipe.

[0014] Furthermore, a float valve and a remote temperature transmitter are provided in the circulating water pool, the circulating water pool water supply pipeline is connected to the float valve provided in the circulating water pool, and the remote temperature transmitter sends the water temperature signal in the circulating water pool to the electric regulating valve on the high-temperature condensing water pipeline through a feedback control loop.

[0015] The utility model discloses a vacuum salt production condensate water recovery and comprehensive utilization device, which has the following beneficial effects:

[0016] 1. The vacuum salt production condensate water recovery and comprehensive utilization equipment has simple technical transformation and low technical transformation material cost; it is safe and reliable, and has good energy-saving and emission reduction effects; by utilizing high-temperature condensate water, it increases the boiler inlet air temperature and reduces the boiler coal consumption, with obvious economic benefits.

[0017] 2. The vacuum salt making condensate water recovery and comprehensive utilization equipment effectively recycles and utilizes low-temperature condensate to supplement the leakage loss of the heating system and the leakage loss and wind loss of the circulating water system, so as to achieve the recycling of water, avoid pipe scaling, and save the cost of chemical use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a flow chart of the pipeline rectification structure of this utility model.

[0020] In the figure: 1. Vacuum salt making device; 2. Deaerator; 3. Primary fan heater; 4. Secondary fan heater; 5. Heating water tank; 6. Circulating water pool; 7. High-temperature condensate water pipeline; 8. Deaerator condensate water pipeline; 9. Heater bypass pipeline; 10. Primary fan heater water inlet pipeline; 11. Secondary fan heater water inlet pipeline; 12. Low-temperature condensate water pipeline; 13. Heating water tank pipeline; 14. Circulating water pool pipeline; 15. Circulating water pool water supply pipeline; 16. Electric regulating valve; 17. Stop valve; 18. Float valve; 19. Remote temperature meter; 20. Feedback control loop. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0022] The embodiment of the utility model discloses a vacuum salt production condensate water recovery and comprehensive utilization device;

[0023] According to the attached Figure 1 As shown, the vacuum salt making device 1 recovers the 104°C high-temperature condensed water after condensation of saturated steam, pressurizes it to 0.5 MPa and sends it to the high-temperature condensed water pipeline (7).

[0024] The vacuum salt making device 1 supplies high-temperature condensed water to the outside through the high-temperature condensed water pipeline 7. The high-temperature condensed water pipeline 7 is connected to the deaerator condensed water pipeline 8, the heater bypass pipeline 9, the primary fan heater water inlet pipeline 10, and the secondary fan heater water inlet pipeline 11 in sequence through a three-way joint for transporting high-temperature condensed water.

[0025] An electric regulating valve 16 is provided on the high-temperature condensate water pipeline 7 for adjusting the amount of water entering the circulating water pool 6. The deaerator condensate water pipeline 8 is connected to the deaerator 2. An electric regulating valve 16 is provided on the deaerator condensate water pipeline 8 for adjusting the amount of water entering the deaerator 2.

[0026] The primary fan heater 3 and the secondary fan heater 4 are both S-shaped fin heaters, which are arranged at the horizontal outlet sections of the primary fan and the secondary fan respectively. Hot water flows from top to bottom through the tube side of the heater. The outside of the tube side is welded with multi-layer S-shaped fins. The high-temperature condensed water transfers heat to the tube wall and S-shaped fins of the tube side step by step through heat radiation and heat conduction, and finally transfers the heat to the cold air flowing through the heater through convection heat transfer. The low-temperature water after heat exchange and cooling is discharged from the bottom of the heater.

[0027] The heater bypass pipe 9 is connected to the low-temperature condensate pipe 12. A stop valve 17 is provided on the heater bypass pipe 9 for cutting off the use of the heater.

[0028] The primary fan heater water inlet pipe 10 is connected to the primary fan heater 3, the secondary fan heater water inlet pipe 11 is connected to the secondary fan heater 4, and the low-temperature water pipes at the outlets of the primary fan heater 3 and the secondary fan heater 4 are respectively connected to the low-temperature condensed water pipe 12.

[0029] A stop valve 17 is respectively provided on the water inlet pipe 10 of the primary fan heater and the low-temperature water pipe at the outlet of the primary fan heater 3, which is used to cut off the leakage in time when the primary fan heater 3 leaks. A stop valve 17 is respectively provided on the water inlet pipe 11 of the secondary fan heater and the low-temperature water pipe at the outlet of the secondary fan heater 4, which is used to cut off the leakage in time when the secondary fan heater 4 leaks.

[0030] The low-temperature condensed water pipeline 12 is respectively connected to the heating water tank pipeline 13 and the circulating water pool pipeline 14 . The heating water tank pipeline 13 is connected to the heating water tank 5 , and the circulating water pool pipeline 14 is connected to the circulating water pool 6 .

[0031] The heating water tank pipeline 13 and the circulating water pool pipeline 14 are respectively provided with a stop valve 17 for regulating the amount of low-temperature water.

[0032] A float valve 18 and a remote temperature transmitter 19 are provided in the circulating water pool 6. The circulating water pool water supply pipeline 15 is connected to the float valve 18 provided in the circulating water pool 6 for automatically replenishing industrial water to maintain the liquid level of the circulating water pool 6. The remote temperature transmitter 19 converts the water temperature signal in the circulating water pool 6 into an electrical signal, which is sent to the electric regulating valve 16 on the high-temperature condensate water pipeline 7 through the feedback control loop 20 for controlling the water temperature of the circulating water pool 6 to maintain stability.

[0033] The working principle of this utility model is:

[0034] During the winter heating period, most of the condensed water recovered by the vacuum salt making device 1 enters the deaerator 2 through the high-temperature condensed water pipeline 7 and the deaerator condensed water pipeline 8 and is used as boiler feed water, and its heat is utilized.

[0035] The remaining high-temperature condensed water recovered by the vacuum salt-making device 1 passes through the high-temperature condensed water pipeline 7 and enters the primary fan heater water inlet pipeline 10 and the secondary fan heater water inlet pipeline 11, and is transported to the corresponding primary fan heater 3 and secondary fan heater 4 for heat exchange and cooling. The high-temperature condensed water uses heat through radiation and conduction to heat the cold air at the inlet of the boiler air preheater, and the low-temperature water after heat exchange and cooling enters the low-temperature condensed water pipeline 12.

[0036] By adjusting the opening of the stop valve 17 of the heating water tank pipeline 13 and the circulating water pool pipeline 14, the amount of water entering the heating water tank 5 and the circulating water pool 6 is controlled, and the replenishment water volume of the heating water tank 5 is met first. In addition, there is still surplus low-temperature water that can be sent to the circulating water pool 6 for use as replenishment water.

[0037] When the remote temperature sensor 19 detects that the water temperature in the circulating water pool 6 exceeds the limit, the water temperature signal is converted into an electrical signal through the feedback control loop 20 and sent to the electric regulating valve 16 on the high-temperature condensate water pipeline 7.

[0038] The opening of the electric regulating valve 16 is controlled according to the pre-set control logic to control the amount of high-temperature condensed water passing through. The float valve 18 in the circulating water pool 6 can replenish industrial water in time according to the water level changes to maintain the water level and temperature of the circulating water pool stable.

[0039] When the temperature is low, most of the condensed water recovered by the vacuum salt making device 1 enters the deaerator 2 through the high-temperature condensed water pipeline 7 and the deaerator condensed water pipeline 8 and is used as boiler feed water, and its heat is utilized.

[0040] The remaining high-temperature condensed water recovered by the vacuum salt-making device 1 passes through the high-temperature condensed water pipeline 7 and enters the primary fan heater water inlet pipeline 10 and the secondary fan heater water inlet pipeline 11, and is transported to the corresponding primary fan heater 3 and secondary fan heater 4 for heat exchange and cooling. The high-temperature condensed water uses heat through radiation and conduction to heat the cold air at the inlet of the boiler air preheater.

[0041] The low-temperature water after heat exchange and cooling enters the low-temperature condensation water pipeline 12. By adjusting the opening of the stop valve 17 of the heating water tank pipeline 13 and the circulating water pool pipeline 14, the amount of water entering the heating water tank 5 and the circulating water pool 6 is controlled. The amount of low-temperature water entering is reasonably distributed according to the water level drop of the heating water tank 5 and the circulating water pool 6.

[0042] When the remote thermometer 19 detects that the water temperature in the circulating water pool 6 exceeds the limit, the water temperature signal is converted into an electrical signal through the feedback control loop 20 and sent to the electric regulating valve 16 on the high-temperature condensate water pipeline 7. The opening of the electric regulating valve 16 is controlled according to the pre-set control logic to control the amount of high-temperature condensate water passing through. The float valve 18 in the circulating water pool 6 can replenish industrial water in time according to the water level changes to maintain the water level and temperature of the circulating water pool stable.

[0043] During the non-winter heating period or when the temperature is low, most of the condensed water recovered by the vacuum salt making device 1 enters the deaerator 2 through the high-temperature condensed water pipeline 7 and the deaerator condensed water pipeline 8 to be used as boiler feed water and utilize its heat.

[0044] The remaining high-temperature condensed water recovered by the vacuum salt-making device 1 passes through the high-temperature condensed water pipeline 7 and enters the primary fan heater water inlet pipeline 10 and the secondary fan heater water inlet pipeline 11, and is transported to the corresponding primary fan heater 3 and secondary fan heater 4 for heat exchange and cooling. The high-temperature condensed water uses heat through radiation and conduction to heat the cold air at the inlet of the boiler air preheater, and the low-temperature water after heat exchange and cooling enters the low-temperature condensed water pipeline 12.

[0045] By adjusting the opening of the stop valve 17 of the heating water tank pipeline 13 and the circulating water pool pipeline 14, the amount of water entering the heating water tank 5 and the circulating water pool 6 is controlled, and the water replenishment of the circulating water pool 6 is met first. In addition, there is still surplus low-temperature water that can be used as replenishment water for the heating water tank 5 through the heating water tank pipeline 13.

[0046] When the remote thermometer 19 detects that the water temperature in the circulating water pool 6 is close to the alarm value, the water temperature signal is converted into an electrical signal through the feedback control loop 20 and sent to the electric regulating valve 16 on the high-temperature condensate water pipeline 7. The opening of the electric regulating valve 16 is controlled according to the pre-set control logic to control the amount of high-temperature condensate water passing through. The float valve 18 in the circulating water pool 6 can replenish industrial water in time according to the water level changes to maintain the water level and temperature of the circulating water pool stable.

[0047] When the primary fan heater 3 or the secondary fan heater 4 leaks, the stop valves 17 on both sides can be closed to achieve effective isolation. Before closing, the stop valve 17 on the heater bypass pipe 9 should be opened first. Normally, the stop valve 17 on the heater bypass pipe 9 is closed.

[0048] The electric regulating valve 16 on the deaerator condensate pipeline 8 can adjust the opening according to the water level in the deaerator 2 to control the amount of high-temperature condensate entering the deaerator 2.

[0049] Through the above system, the heat of high-temperature condensed water can be utilized in a step-by-step manner to achieve water recycling. Without adding chemical agents, the scaling of pipes and equipment can be slowed down, achieving the effects of energy conservation and emission reduction, environmental protection, cost reduction and efficiency improvement, with obvious economic benefits.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum salt production condensate water recovery and comprehensive utilization device, comprising a vacuum salt production device (1), characterized in that: It also includes a deaerator (2), a primary air fan heater (3), a secondary air fan heater (4), a heating water tank (5) and a circulating water pool (6); The condensed water recovered by the vacuum salt making device (1) is supplied to the outside through a high-temperature condensed water pipeline (7), and the high-temperature condensed water pipeline (7) is connected to the deaerator condensed water pipeline (8), the heater bypass pipeline (9), the primary fan heater water inlet pipeline (10), and the secondary fan heater water inlet pipeline (11) in sequence through a three-way joint; The high-temperature condensate water pipeline (7) is provided with an electric regulating valve (16), the deaerator condensate water pipeline (8) is connected to the deaerator (2), and the deaerator condensate water pipeline (8) is provided with an electric regulating valve (16); The heater bypass pipe (9) is connected to the low-temperature condensate pipe (12), a stop valve (17) is provided on the heater bypass pipe (9), the primary fan heater water inlet pipe (10) is connected to the primary fan heater (3), and the secondary fan heater water inlet pipe (11) is connected to the secondary fan heater (4); The low-temperature water pipelines at the outlets of the primary fan heater (3) and the secondary fan heater (4) are respectively connected to the low-temperature condensed water pipeline (12), the low-temperature condensed water pipeline (12) is respectively connected to the heating water tank pipeline (13) and the circulating water pool pipeline (14), the heating water tank pipeline (13) is connected to the heating water tank (5), and the circulating water pool pipeline (14) is connected to the circulating water pool (6).

2. The vacuum salt production condensate water recovery and comprehensive utilization equipment according to claim 1, characterized in that: The vacuum salt making device (1) recovers the 104°C high-temperature condensed water after condensation of saturated steam, pressurizes it to 0.5 MPa and sends it to the high-temperature condensed water pipeline (7).

3. The vacuum salt production condensate water recovery and comprehensive utilization equipment according to claim 1, characterized in that: The primary fan heater (3) and the secondary fan heater (4) are both S-shaped fin heaters, which are respectively arranged at the outlet horizontal sections of the primary fan and the secondary fan. Hot water flows from top to bottom through the tube side of the heater, and the outer side of the tube side is welded with multiple layers of S-shaped fins.

4. The vacuum salt production condensate water recovery and comprehensive utilization equipment according to claim 1, characterized in that: A stop valve (17) is provided on the water inlet pipe (10) of the primary fan heater and the water inlet pipe (11) of the secondary fan heater, respectively; a stop valve (17) is provided on the low-temperature water pipes at the outlets of the primary fan heater (3) and the secondary fan heater (4), respectively; and a stop valve (17) is provided on the heating water tank pipe (13) and the circulating water pool pipe (14).

5. The vacuum salt production condensate water recovery and comprehensive utilization equipment according to claim 1, characterized in that: A float valve (18) and a remote temperature transmitter (19) are provided in the circulating water pool (6); the float valve (18) provided in the circulating water pool (6) is connected to a circulating water pool water supply pipeline (15); and the remote temperature transmitter (19) transmits a water temperature signal in the circulating water pool (6) to an electric regulating valve (16) on a high-temperature condensed water pipeline (7) through a feedback control loop (20).

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