Evaporative condensing system with online circulation cleaning function

Abstract

The utility model discloses an evaporative condensing system with online circulation cleaning function, evaporative tower T1 and T2 connect raw water pipeline, running water inlet pipe LW-0101 connects evaporative tower T1 and T2, condensing tower T3 and T4, evaporative tower T1 connects heat exchanger R1, heat exchanger R2-1, heat exchanger R2-2, heat exchanger R1 connects heat exchanger R2-1 and R2-2, heat exchanger R2-1 and R2-2 connect evaporative tower T2, and evaporative tower T2 is connected with T1, evaporative tower T1 and T2 connect the concentrated circulating pipeline, and the concentrated circulating pipeline connects thick liquid jar N, and condensing tower T3, heat exchanger R1, heat exchanger R3, condensing tower T4 are closed connection, and there is the pipeline between condensing tower T4 and evaporative tower T2, and inlet air pipeline, evaporative tower T1 and T2, condensing tower T3 and T4, outlet air pipeline are connected in proper order. The utility model can adjust the process flexibly, save the cleaning water amount, guarantee the cleaning effect, and improve the cleaning efficiency.

Description

Technical Field

[0001] This utility model relates to the field of evaporation and condensation technology, and in particular to an evaporation and condensation system with online circulating cleaning function. Background Technology

[0002] Currently, low-temperature evaporation is commonly used to treat high-salt liquids. This involves heating the waste liquid to form a concentrated liquid and vapor, which is then condensed back into liquid. This method allows for the recovery of necessary substances from the waste liquid for recycling while also meeting waste liquid discharge requirements. However, current treatment processes suffer from limitations in flexibility and simplistic approaches. After system operation or prolonged shutdown, the evaporation tower requires cleaning. Traditional cleaning methods are not only water-intensive but also ineffective, impacting the system's subsequent use. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an evaporation and condensation system with online circulating cleaning function, which aims to solve the technical problems of poor process flexibility and wasteful and ineffective cleaning of evaporation towers in the prior art.

[0004] The technical solution of this utility model is: an evaporation and condensation system with online circulation cleaning function, including a tap water inlet pipe LW-0101, evaporation tower T1, evaporation tower T2, condensation tower T3, condensation tower T4, heat exchanger R1, heat exchanger R2-1, heat exchanger R2-2, heat exchanger R3, and concentrated liquid tank N. Evaporation tower T1 and evaporation tower T2 are respectively connected to pipes for introducing raw water, and tap water inlet pipe LW-0101 is connected to evaporation tower T1, evaporation tower T2, condensation tower T3 and condensation tower T4 respectively; Evaporation tower T1 is connected to the raw liquid inlets of heat exchangers R1, R2-1, and R2-2 respectively. The raw liquid outlet of heat exchanger R1 is connected to the raw liquid inlets of heat exchangers R2-1 and R2-2. The raw liquid outlets of heat exchangers R2-1 and R2-2 are connected to evaporation tower T2. Evaporation tower T2 is connected to evaporation tower T1. A T1 concentrated liquid discharge circulation pipe is connected to the bottom of evaporation tower T1. A T2 concentrated liquid discharge circulation pipe is connected to the bottom of evaporation tower T2. The T1 and T2 concentrated liquid discharge circulation pipes are respectively connected to the concentrated liquid tank N. The condenser T3 is connected to the tap water inlet of the heat exchanger R1, the tap water outlet of the heat exchanger R1 is connected to the tap water inlet of the heat exchanger R3, the tap water outlet of the heat exchanger R3 is connected to the condenser T4, and the condenser T4 is connected to the condenser T3; a pipe for returning water to clean the evaporator T2 is also connected between the condenser T4 and the evaporator T2. The evaporator T1 is connected to a pipe for air intake, and the evaporator T1, evaporator T2, condenser T3, and condenser T4 are connected in sequence. The condenser T4 is also connected to a pipe for air outlet.

[0005] Furthermore, in this utility model, the bottom of the evaporation tower T1 is connected to a pipe CWW-0102 for introducing raw water, and the bottom of the evaporation tower T2 is connected to a pipe CWW-0103 for introducing raw water.

[0006] Furthermore, in this utility model, the tap water inlet pipe LW-0101 is connected to the top of the evaporation tower T1 via ball valve QF01 and pipe LW-0102; the tap water inlet pipe LW-0101 is connected to the top of the evaporation tower T2 via ball valve QF02 and pipe LW-0103; the tap water inlet pipe LW-0101 is connected to the top of the condensation tower T3 via ball valve QF03 and pipe LW-0104; and the tap water inlet pipe LW-0101 is connected to the top of the condensation tower T4 via ball valve QF04 and pipe LW-0105.

[0007] Furthermore, in this utility model, the bottom of the evaporation tower T1 is connected to pipe CWW-0204 via tower-one circulation pump P2, pipe CWW-0202, and manual butterfly valve DF05. Pipe CWW-0202 is connected to the raw liquid inlet of heat exchanger R1 via manual butterfly valve DF06. Pipe CWW-0204 is connected to the raw liquid inlet of heat exchanger R2-1 via manual butterfly valve DF08. Pipe CWW-0204 is connected to the raw liquid inlet of heat exchanger R2-2 via manual butterfly valve DF09. The heat exchanger... The raw liquid outlet of R1 is connected to the CWW-0204 via manual butterfly valve DF07 and pipe CWW-0203. The raw liquid outlet of heat exchanger R2-1 is connected to the top of evaporation tower T2 via manual butterfly valve DF10, pipe CWW-0205, and pipe CWW-0207. The raw liquid outlet of heat exchanger R2-2 is connected to the CWW-0207 via manual butterfly valve DF11 and pipe CWW-0206. The bottom of evaporation tower T2 is connected to the top of evaporation tower T1 via tower two circulation pump P3.

[0008] Furthermore, the T1 condensate discharge circulation pipeline of this utility model includes a manual butterfly valve DF21 connected to one side of the bottom of the evaporator T1. The manual butterfly valve DF21 is connected to the other side of the bottom of the evaporator T1 via pipeline CNW-0101, condensate discharge circulation pump P7-1, pneumatic butterfly valve QD01, pipeline CNW-0102, and manual butterfly valve DF23. The T2 condensate discharge circulation pipeline includes a manual butterfly valve DF24 connected to one side of the bottom of the evaporator T2. The manual butterfly valve DF24 is connected to the other side of the bottom of the evaporator T2 via pipeline CNW-0201, condensate discharge circulation pump P7-2, pneumatic butterfly valve QD04, pipeline CNW-0202, and manual butterfly valve DF26.

[0009] Furthermore, in this utility model, a manual butterfly valve DF22 is connected to the pipeline between the concentrate discharge circulation pump P7-1 and the pneumatic butterfly valve QD01. The manual butterfly valve DF22 is connected to the concentrate tank N through the pneumatic butterfly valve QD02 and the pipeline CNW-0103. A manual butterfly valve DF25 is connected to the pipeline between the concentrate discharge circulation pump P7-2 and the pneumatic butterfly valve QD04. The manual butterfly valve DF25 is connected to the pipeline CNW-0103 through the pneumatic butterfly valve QD03.

[0010] Furthermore, in this utility model, the bottom of the condensing tower T3 is connected to the tap water inlet of the heat exchanger R1 via the tower three circulation pump P4, and the tap water outlet of the heat exchanger R3 is connected to the top of the condensing tower T4; the bottom of the condensing tower T4 is connected to the top of the condensing tower T3 via the tower four circulation pump P5, pipe CWW-0502, and manual butterfly valve DF18, and pipe CWW-0502 is also connected to pipe CWW-0207 via manual butterfly valve DF27 and pipe CWW-0503.

[0011] Furthermore, in this utility model, the steam inlets of heat exchangers R2-1 and R2-2 are connected to the steam inlet pipes via shut-off valves JZF01 and JZF02, respectively, and the steam outlets of heat exchangers R2-1 and R2-2 are connected to the steam outlet pipes via shut-off valves JZF03 and JZF04, respectively; the cooling water inlet of heat exchanger R3 is connected to the cooling water inlet pipe via a manual butterfly valve DF19, and the cooling water outlet of heat exchanger R3 is connected to the cooling water outlet pipe via a manual butterfly valve DF20.

[0012] Furthermore, in this utility model, the bottom of the evaporator T1 is connected to a pipe GS-0102 for air intake, the top of the evaporator T1 is connected to the bottom of the evaporator T2 via pipe GS-0103, the top of the evaporator T2 is connected to the bottom of the condenser T3 via pipe GS-0104, the top of the condenser T3 is connected to the bottom of the condenser T4 via pipe GS-0105, and the top of the condenser T4 is connected to a pipe GS-0106 for air outlet.

[0013] Compared with the prior art, this utility model has the following advantages: This utility model uses two evaporation towers to circulate and evaporate high-salt liquids. The system operation can be flexibly adjusted according to actual needs, including a rapid heating stage and a stable operation stage, which greatly improves the treatment effect compared with traditional treatment systems. After a long period of shutdown, the system can choose to introduce tap water into the two evaporation towers or use the liquid in the two condensation towers to clean the evaporation towers. After starting the cleaning program, the circulating cleaning prevents the sediment from settling and adhering to the tower body. After the cleaning time is reached, the system is automatically emptied, which can save cleaning water, ensure cleaning effect, and improve cleaning efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the connection structure of the system of this utility model. Detailed Implementation

[0015] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0016] Example: The accompanying drawings illustrate a specific embodiment of an evaporation and condensation system with online circulating cleaning function according to this utility model. Figure 1 It mainly includes tap water inlet pipe LW-0101, evaporator T1, evaporator T2, condenser T3, condenser T4, heat exchanger R1, heat exchanger R2-1, heat exchanger R2-2, heat exchanger R3, and concentrate tank N.

[0017] The bottom of evaporator T1 is connected to a pipe CWW-0102 for introducing raw water, and the bottom of evaporator T2 is connected to a pipe CWW-0103 for introducing raw water.

[0018] The tap water inlet pipe LW-0101 is connected to the top of evaporator T1 via ball valve QF01 and pipe LW-0102. The tap water inlet pipe LW-0101 is connected to the top of evaporator T2 via ball valve QF02 and pipe LW-0103. The tap water inlet pipe LW-0101 is connected to the top of condenser T3 via ball valve QF03 and pipe LW-0104. The tap water inlet pipe LW-0101 is connected to the top of condenser T4 via ball valve QF04 and pipe LW-0105.

[0019] The bottom of evaporator T1 is connected to pipe CWW-0204 via tower circulation pump P2, pipe CWW-0202, and manual butterfly valve DF05. Pipe CWW-0202 is connected to the raw liquid inlet of heat exchanger R1 via manual butterfly valve DF06. Pipe CWW-0204 is connected to the raw liquid inlet of heat exchanger R2-1 via manual butterfly valve DF08. Pipe CWW-0204 is connected to the raw liquid inlet of heat exchanger R2-2 via manual butterfly valve DF09.

[0020] The raw liquid outlet of heat exchanger R1 is connected to the top of evaporator T2 via manual butterfly valve DF07, pipe CWW-0203 and pipe CWW-0204. The raw liquid outlet of heat exchanger R2-1 is connected to the top of evaporator T2 via manual butterfly valve DF10, pipe CWW-0205 and pipe CWW-0207. The raw liquid outlet of heat exchanger R2-2 is connected to the top of evaporator T2 via manual butterfly valve DF11, pipe CWW-0206 and pipe CWW-0207.

[0021] The bottom of evaporator T2 is connected to the top of evaporator T1 via evaporator circulation pump P3 for circulating evaporation.

[0022] The bottom of evaporator T1 is connected to a T1 exhaust circulation pipeline. The T1 exhaust circulation pipeline includes a manual butterfly valve DF21 connected to one side of the bottom of evaporator T1. The manual butterfly valve DF21 is connected to the other side of the bottom of evaporator T1 through pipeline CNW-0101, exhaust circulation pump P7-1, pneumatic butterfly valve QD01, pipeline CNW-0102, and manual butterfly valve DF23.

[0023] The bottom of evaporator T2 is connected to a T2 exhaust circulation pipeline. The T2 exhaust circulation pipeline includes a manual butterfly valve DF24 connected to one side of the bottom of evaporator T2. The manual butterfly valve DF24 is connected to the other side of the bottom of evaporator T2 through pipeline CNW-0201, exhaust circulation pump P7-2, pneumatic butterfly valve QD04, pipeline CNW-0202, and manual butterfly valve DF26.

[0024] The T1 and T2 concentrate discharge circulation pipelines are respectively connected to the concentrate tank N. Specifically, a manual butterfly valve DF22 is connected to the pipeline between the concentrate discharge circulation pump P7-1 and the pneumatic butterfly valve QD01. The manual butterfly valve DF22 is connected to the concentrate tank N via the pneumatic butterfly valve QD02 and pipeline CNW-0103. A manual butterfly valve DF25 is connected to the pipeline between the concentrate discharge circulation pump P7-2 and the pneumatic butterfly valve QD04. The manual butterfly valve DF25 is connected to the pipeline CNW-0103 via the pneumatic butterfly valve QD03.

[0025] The bottom of condenser T3 is connected to the tap water inlet of heat exchanger R1 via tower three circulation pump P4. The tap water outlet of heat exchanger R1 is connected to the tap water inlet of heat exchanger R3. The tap water outlet of heat exchanger R3 is connected to the top of condenser T4. The bottom of condenser T4 is connected to the top of condenser T3 via tower four circulation pump P5, pipeline CWW-0502, and manual butterfly valve DF18.

[0026] A pipe for cleaning the evaporator tower is also connected between the condenser tower T4 and the evaporator tower T2. Specifically, pipe CWW-0502 is connected to pipe CWW-0503 and pipe CWW-0207 via manual butterfly valve DF27.

[0027] Heat exchangers R2-1 and R2-2 are connected to steam pipes. Specifically, the steam inlets of heat exchangers R2-1 and R2-2 are connected to the steam inlet pipes through shut-off valves JZF01 and JZF02, respectively, and the steam outlets of heat exchangers R2-1 and R2-2 are connected to the steam outlet pipes through shut-off valves JZF03 and JZF04, respectively.

[0028] Heat exchanger R3 is connected to a cooling water pipe. Specifically, the cooling water inlet of heat exchanger R3 is connected to a cooling water inlet pipe via a manual butterfly valve DF19, and the cooling water outlet of heat exchanger R3 is connected to a cooling water outlet pipe via a manual butterfly valve DF20.

[0029] The bottom of evaporator T1 is connected to a duct GS-0102 for air intake. The top of evaporator T1 is connected to the bottom of evaporator T2 via duct GS-0103. The top of evaporator T2 is connected to the bottom of condenser T3 via duct GS-0104. The top of condenser T3 is connected to the bottom of condenser T4 via duct GS-0105. The top of condenser T4 is connected to a duct GS-0106 for air outlet.

[0030] When the system of this utility model is in operation, it includes the following steps: I. Before starting the equipment 1.1 Add the appropriate liquid level of the raw liquid to the evaporator T1 through the pipeline CWW-0102.

[0031] 1.2 Add the appropriate liquid level of the raw liquid to the evaporator T2 through the pipeline CWW-0103.

[0032] 1.3 Add tap water to the condenser T3 at an appropriate level through pipe LW-0101, ball valve QF03, and pipe LW-0104.

[0033] 1.4 Add tap water to the condenser T4 at an appropriate level through pipe LW-0101, ball valve QF04, and pipe LW-0105.

[0034] 1.5 The air duct system is as follows: fresh air is discharged through duct GS-0102, evaporator T1, duct GS-0103, evaporator T2, duct GS-0104, condenser T3, duct GS-0105, condenser T4, and duct GS-0106, and is completely shut off after a certain period of time.

[0035] II. Equipment Start-up 2.1 Rapid temperature rise stage during start-up of evaporator T1, evaporator T2, condenser T3, and condenser T4 2.1.1 The raw liquid inside evaporator T1 flows from the bottom of evaporator T1 to the top of evaporator T2 via circulating pump P2, pipe CWW-0202, manual butterfly valve DF05, pipe CWW-0204, manual butterfly valve DF08, heat exchanger R2-1, manual butterfly valve DF10, pipe CWW-0205, and pipe CWW-0207. At this time, manual butterfly valves DF06, DF07, DF09, DF11, and DF27 are closed, shut-off valves JZF01 and JZF03 are open, and shut-off valves JZF02 and JZF04 are closed. The raw liquid from evaporator T1 to evaporator T2 is heated to the expected evaporation temperature through heat exchanger R2-1.

[0036] 2.1.2 The raw liquid inside evaporator T2 flows from the bottom of evaporator T2 to the top of evaporator T1 through the second circulation pump P3.

[0037] 2.1.3 Inside condenser T3, tap water flows from the bottom of condenser T3 through the three-stage circulation pump P4, heat exchanger R1, and heat exchanger R3 to the top of condenser T4. At this time, manual butterfly valves DF19 and DF20 are closed.

[0038] 2.1.4 The tap water inside condenser T4 flows from the bottom of condenser T4 through the four-stage circulation pump P5, pipeline CWW-0502, and manual butterfly valve DF18 to the top of condenser T3. At this time, manual butterfly valve DF27 is closed.

[0039] 2.1.5 Steam from the steam pipeline is discharged into the sewer through shut-off valve JZF01, heat exchanger R2-1, and shut-off valve JZF03. At this time, shut-off valves JZF02 and JZF04 are in the closed state.

[0040] 2.1.6 The manual butterfly valves DF19 and DF20 of the cooling water pipeline are closed.

[0041] 2.1.7 Air duct system: Fresh air is discharged into RTO via duct GS-0102, evaporator T1, duct GS-0103, evaporator T2, duct GS-0104, condenser T3, duct GS-0105, condenser T4, and duct GS-0106.

[0042] 2.1.8 There is no liquid flow in the T1 concentrated discharge circulation pipe of evaporator T1.

[0043] 2.1.9 There is no liquid flow in the T2 concentrated discharge circulation pipe of evaporator T2.

[0044] 2.1.10 Raw material pipeline system: As evaporation proceeds in evaporator T1 and evaporator T2, when the liquid level in evaporator T1 reaches the set minimum value, raw material of appropriate liquid level is added to evaporator T1 through pipeline CWW-0102 until the liquid level rises to the set value.

[0045] 2.2 Stable evaporation stages in evaporator T1 and T2, and stable condensation stages in condenser T3 and T4. 2.2.1 The raw liquid inside evaporator T1 flows from the bottom of evaporator T1 to the top of evaporator T2 via circulating pump P2, manual butterfly valve DF06, heat exchanger R1, manual butterfly valve DF07, pipes CWW-0203 and CWW-0204, manual butterfly valve DF08, heat exchanger R2-1, manual butterfly valve DF10, pipes CWW-0205 and CWW-0207. At this time, manual butterfly valves DF05, DF09, DF11, and DF27 are closed, stop valves JZF01 and JZF03 are open, and stop valves JZF02 and JZF04 are closed. The raw liquid in evaporation towers T1 and T2 is first preheated through heat exchanger R1, and then further heated to the expected evaporation temperature through heat exchanger R2-1 (the liquid in evaporation towers T1 and T2 absorbs heat from the liquid in condensation towers T3 and T4 through heat exchanger R1, and the liquid in evaporation towers T1 and T2 is heated to the set temperature through heat exchanger R2-1). It should be noted that heat exchanger R2-2 can be used interchangeably with heat exchanger R2-1 as needed.

[0046] 2.2.2 The flow from evaporator T2 to evaporator T1 is the same as in 2.1.2. 2.2.3 The flow from condenser T3 to condenser T4 is the same as in 2.1.3. 2.2.4 The flow from condenser T4 to condenser T3 is the same as in 2.1.4. 2.2.5 Steam piping is the same as 2.1.5 2.2.6 With the manual butterfly valves DF19 and DF20 of the cooling water pipeline open, cooling water flows through heat exchanger R3.

[0047] 2.2.7 The ventilation system is the same as 2.1.7. 2.2.8 When the density of the raw liquid inside evaporator T1 falls below the set value, at regular intervals, manual butterfly valve DF21, pneumatic butterfly valve QD01, manual butterfly valve DF23, and the concentrate removal circulation pump P7-1 open, while pneumatic butterfly valve QD02 closes. The raw liquid flows back to evaporator T1 through manual butterfly valve DF21, pipeline CNW-0101, concentrate removal circulation pump P7-1, pneumatic butterfly valve QD01, pipeline CNW-0102, and manual butterfly valve DF23. Circulation of the concentrated liquid at the bottom stops after the set time. Its function is to circulate the liquid inside evaporator T1 and prevent sediment from settling and adhering to the tower body.

[0048] 2.2.9 When the density of the raw liquid inside evaporator T2 falls below the set value, at regular intervals, manual butterfly valve DF24, pneumatic butterfly valve QD04, manual butterfly valve DF26, and the concentrate removal circulation pump P7-2 open, while pneumatic butterfly valve QD03 closes. The raw liquid flows back to evaporator T2 through manual butterfly valve DF24, pipeline CNW-0201, concentrate removal circulation pump P7-2, pneumatic butterfly valve QD04, pipeline CNW-0202, and manual butterfly valve DF26. Circulation of the concentrated liquid at the bottom stops after the set time. Its function is to circulate the liquid inside evaporator T2 and prevent sediment from settling and adhering to the tower body.

[0049] 2.3 Concentration Removal Stage When the raw liquid inside evaporator T1 or evaporator T2 reaches the set density value, the manual butterfly valve DF21, the concentrated liquid circulation pump P7-1, the manual butterfly valve DF22, and the pneumatic butterfly valve QD02 on the T1 concentrated liquid circulation pipeline of evaporator T1 are opened. The raw liquid flows through the manual butterfly valve DF21, pipeline CNW-0101, concentrated liquid circulation pump P7-1, manual butterfly valve DF22, pneumatic butterfly valve QD02, and pipeline CNW-0103 to the concentrated liquid tank N.

[0050] After the liquid in evaporator T1 is emptied, the manual butterfly valve DF24, the concentrated liquid circulation pump P7-2, the manual butterfly valve DF25, and the pneumatic butterfly valve QD03 on the T2 concentrated liquid circulation pipeline of evaporator T2 are opened. The raw liquid flows through the manual butterfly valve DF24, pipeline CNW-0201, concentrated liquid circulation pump P7-2, manual butterfly valve DF25, pneumatic butterfly valve QD03, and pipeline CNW-0103 to the concentrated liquid tank N.

[0051] The above process constitutes one cycle. After draining the liquid, repeat steps 1.1 and 1.2 to replenish the original liquid, and then continue with steps 2.1, 2.2, and 2.3.

[0052] In this invention, the middle sections of evaporation towers T1, T2, T3, and T4 are all filled with packing layers. Their function is to increase the surface area of ​​the liquid flowing down from the top of the tower when it encounters the packing. Air enters from the bottom and exits from the top of the tower. The liquid in evaporation towers T1 and T2 is at a higher temperature than the circulating air, causing the original liquid to evaporate rapidly. The circulating air carries away the evaporated original liquid. The liquid in condensation towers T3 and T4 is at a lower temperature than the circulating air, causing the water vapor and other substances carried by the circulating air to condense rapidly and be collected in condensation towers T3 and T4.

[0053] 2.4 Long-term downtime 2.4.1 After the concentrated water is discharged from evaporator T1 and evaporator T2, add an appropriate amount of tap water to evaporator T1 through pipe LW-0101, ball valve QF01, and pipe LW-0102. Add an appropriate amount of tap water to evaporator T2 through pipe LW-0101, ball valve QF02, and pipe LW-0103.

[0054] 2.4.2 Subsequently, the cleaning procedures for evaporator towers T1 and T2 are initiated. Inside evaporator tower T1, tap water flows from the bottom through the circulating pump P2, pipe CWW-0202, manual butterfly valve DF06, heat exchanger R1, manual butterfly valve DF07, pipes CWW-0203 and CWW-0204, manual butterfly valve DF08, heat exchanger R2-1, manual butterfly valve DF10, pipes CWW-0205 and CWW-0207 to the top of evaporator tower T2. At this time, manual butterfly valves DF05, DF09, DF11, and DF27 are closed, shut-off valves JZF01 and JZF03 are open, and shut-off valves JZF02 and JZF04 are closed. The tap water from evaporator tower T1 to evaporator tower T2 is heated to the desired cleaning temperature through heat exchanger R2-1. (The tap water in evaporator T1 and evaporator T2 is heated to the set temperature through heat exchanger R2-1) 2.4.3 The flow from evaporator T2 to evaporator T1 is the same as in 2.1.2. 2.4.4 Steam piping is the same as 2.1.5 2.4.5 On the T1 concentrate discharge circulation pipeline of evaporator T1, manual butterfly valve DF21, concentrate discharge circulation pump P7-1, pneumatic butterfly valve QD01, and manual butterfly valve DF23 are open, while pneumatic butterfly valve QD02 is closed. The raw liquid flows through manual butterfly valve DF21, pipeline CNW-0101, concentrate discharge circulation pump P7-1, pneumatic butterfly valve QD01, pipeline CNW-0102, and manual butterfly valve DF23 back to evaporator T1. Circulation stops after the set cleaning time. Its function is to circulate the tap water inside evaporator T1, preventing sediment from settling and adhering to the tower body.

[0055] 2.4.6 After the set cleaning time is reached, the manual butterfly valve DF21, the concentrate drainage circulation pump P7-1, the manual butterfly valve DF22, and the pneumatic butterfly valve QD02 are opened. Tap water flows through the manual butterfly valve DF21, pipeline CNW-0101, the concentrate drainage circulation pump P7-1, the manual butterfly valve DF22, the pneumatic butterfly valve QD02, and pipeline CNW-0103 to the concentrate tank N. After the tap water is drained, the pneumatic butterfly valve QD02 and the concentrate drainage circulation pump P7-1 are closed.

[0056] After the tap water in evaporator T1 is drained, the manual butterfly valve DF24, the concentrate circulation pump P7-2, the manual butterfly valve DF25, and the pneumatic butterfly valve QD03 on the T2 concentrate discharge circulation pipeline of evaporator T2 are opened. Tap water flows through the manual butterfly valve DF24, pipeline CNW-0201, concentrate circulation pump P7-2, manual butterfly valve DF25, pneumatic butterfly valve QD03, and pipeline CNW-0103 to discharge into the concentrate tank N. After the raw liquid is drained, the pneumatic butterfly valve QD03 and the concentrate discharge circulation pump P7-2 are closed. Finally, all equipment is shut down. The shutdown process is complete.

[0057] 2.5 Optimization Process for Long-Term Downtime Unlike 2.4, after the concentrated water from evaporators T1 and T2 is discharged, the tap water inside condenser T4 flows from the bottom of condenser T4 to the top of evaporator T2 via circulating pump P5, pipe CWW-0502, manual butterfly valve DF27, pipe CWW-0503, and pipe CWW-0207. At this time, manual butterfly valve DF18 is closed.

[0058] The flow from condenser T3 to condenser T4 is the same as in section 2.1.3. The flow from evaporator T2 to evaporator T1 is the same as in 2.1.2. Following this flow, the liquid from condenser T3 and condenser T4 is directed to evaporator T1 and evaporator T2, and the subsequent flow is the same as in 2.4.2, 2.4.3, 2.4.4, 2.4.5, and 2.4.6.

[0059] Of course, the above embodiments are only for illustrating the technical concept and features of this utility model, and their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All modifications made in accordance with the spirit and essence of the main technical solution of this utility model should be covered within the protection scope of this utility model.

Claims

1. An evaporation and condensation system with online circulating cleaning function, characterized in that: Includes tap water inlet pipe LW-0101, evaporator T1, evaporator T2, condenser T3, condenser T4, heat exchanger R1, heat exchanger R2-1, heat exchanger R2-2, heat exchanger R3, and concentrate tank N; Evaporation tower T1 and evaporation tower T2 are respectively connected to pipes for introducing raw water, and tap water inlet pipe LW-0101 is connected to evaporation tower T1, evaporation tower T2, condensation tower T3 and condensation tower T4 respectively; Evaporation tower T1 is connected to the raw liquid inlets of heat exchangers R1, R2-1, and R2-2 respectively. The raw liquid outlet of heat exchanger R1 is connected to the raw liquid inlets of heat exchangers R2-1 and R2-2. The raw liquid outlets of heat exchangers R2-1 and R2-2 are connected to evaporation tower T2. Evaporation tower T2 is connected to evaporation tower T1. A T1 concentrated liquid discharge circulation pipe is connected to the bottom of evaporation tower T1. A T2 concentrated liquid discharge circulation pipe is connected to the bottom of evaporation tower T2. The T1 and T2 concentrated liquid discharge circulation pipes are respectively connected to the concentrated liquid tank N. The condenser T3 is connected to the tap water inlet of the heat exchanger R1, the tap water outlet of the heat exchanger R1 is connected to the tap water inlet of the heat exchanger R3, the tap water outlet of the heat exchanger R3 is connected to the condenser T4, and the condenser T4 is connected to the condenser T3; a pipe for returning water to clean the evaporator T2 is also connected between the condenser T4 and the evaporator T2. The evaporator T1 is connected to a pipe for air intake, and the evaporator T1, evaporator T2, condenser T3, and condenser T4 are connected in sequence. The condenser T4 is also connected to a pipe for air outlet.

2. The evaporation and condensation system with online circulating cleaning function according to claim 1, characterized in that: The bottom of the evaporation tower T1 is connected to a pipe CWW-0102 for introducing raw water, and the bottom of the evaporation tower T2 is connected to a pipe CWW-0103 for introducing raw water.

3. The evaporation and condensation system with online circulating cleaning function according to claim 1, characterized in that: The tap water inlet pipe LW-0101 is connected to the top of the evaporation tower T1 via ball valve QF01 and pipe LW-0102. The tap water inlet pipe LW-0101 is connected to the top of the evaporation tower T2 via ball valve QF02 and pipe LW-0103. The tap water inlet pipe LW-0101 is connected to the top of the condensation tower T3 via ball valve QF03 and pipe LW-0104. The tap water inlet pipe LW-0101 is connected to the top of the condensation tower T4 via ball valve QF04 and pipe LW-0105.

4. The evaporation and condensation system with online circulating cleaning function according to claim 1, characterized in that: The bottom of the evaporator T1 is connected to pipe CWW-0204 via a circulation pump P2, pipe CWW-0202, and manual butterfly valve DF05. Pipe CWW-0202 is connected to the raw liquid inlet of heat exchanger R1 via manual butterfly valve DF06. Pipe CWW-0204 is connected to the raw liquid inlet of heat exchanger R2-1 via manual butterfly valve DF08. Pipe CWW-0204 is connected to the raw liquid inlet of heat exchanger R2-2 via manual butterfly valve DF09. The raw liquid outlet of heat exchanger R1... The outlet of heat exchanger R2-1 is connected to the top of evaporator T2 via manual butterfly valve DF07, pipe CWW-0203, and pipe CWW-0204. The outlet of heat exchanger R2-2 is connected to the top of evaporator T2 via manual butterfly valve DF10, pipe CWW-0205, and pipe CWW-0207. The outlet of heat exchanger R2-2 is connected to the top of evaporator T1 via manual butterfly valve DF11, pipe CWW-0206, and pipe CWW-0207. The bottom of evaporator T2 is connected to the top of evaporator T1 via second-stage circulation pump P3.

5. An evaporation and condensation system with online circulating cleaning function according to claim 1, characterized in that: The T1 condensate discharge circulation pipeline includes a manual butterfly valve DF21 connected to one side of the bottom of the evaporator T1. The manual butterfly valve DF21 is connected to the other side of the bottom of the evaporator T1 via pipeline CNW-0101, condensate discharge circulation pump P7-1, pneumatic butterfly valve QD01, pipeline CNW-0102, and manual butterfly valve DF23. The T2 condensate discharge circulation pipeline includes a manual butterfly valve DF24 connected to one side of the bottom of the evaporator T2. The manual butterfly valve DF24 is connected to the other side of the bottom of the evaporator T2 via pipeline CNW-0201, condensate discharge circulation pump P7-2, pneumatic butterfly valve QD04, pipeline CNW-0202, and manual butterfly valve DF26.

6. An evaporation and condensation system with online circulating cleaning function according to claim 5, characterized in that: A manual butterfly valve DF22 is connected to the pipeline between the concentrated liquid circulation pump P7-1 and the pneumatic butterfly valve QD01. The manual butterfly valve DF22 is connected to the concentrated liquid tank N through the pneumatic butterfly valve QD02 and the pipeline CNW-0103. A manual butterfly valve DF25 is connected to the pipeline between the concentrated liquid circulation pump P7-2 and the pneumatic butterfly valve QD04. The manual butterfly valve DF25 is connected to the pipeline CNW-0103 through the pneumatic butterfly valve QD03.

7. An evaporation and condensation system with online circulating cleaning function according to claim 4, characterized in that: The bottom of the condenser T3 is connected to the tap water inlet of the heat exchanger R1 via the tower three circulation pump P4, and the tap water outlet of the heat exchanger R3 is connected to the top of the condenser T4; the bottom of the condenser T4 is connected to the top of the condenser T3 via the tower four circulation pump P5, pipe CWW-0502, and manual butterfly valve DF18, and pipe CWW-0502 is also connected to pipe CWW-0207 via manual butterfly valve DF27 and pipe CWW-0503.

8. An evaporation and condensation system with online circulating cleaning function according to claim 1, characterized in that: The steam inlets of heat exchangers R2-1 and R2-2 are connected to the steam inlet pipes via shut-off valves JZF01 and JZF02, respectively. The steam outlets of heat exchangers R2-1 and R2-2 are connected to the steam outlet pipes via shut-off valves JZF03 and JZF04, respectively. The cooling water inlet of heat exchanger R3 is connected to the cooling water inlet pipe via a manual butterfly valve DF19, and the cooling water outlet of heat exchanger R3 is connected to the cooling water outlet pipe via a manual butterfly valve DF20.

9. An evaporation and condensation system with online circulating cleaning function according to claim 1, characterized in that: The bottom of the evaporator T1 is connected to a pipe GS-0102 for air intake. The top of the evaporator T1 is connected to the bottom of the evaporator T2 via pipe GS-0103. The top of the evaporator T2 is connected to the bottom of the condenser T3 via pipe GS-0104. The top of the condenser T3 is connected to the bottom of the condenser T4 via pipe GS-0105. The top of the condenser T4 is connected to a pipe GS-0106 for air outlet.

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