Multi-process high-stability low-temperature evaporation treatment system

Abstract

The application discloses a kind of multi-process high-stability low-temperature evaporation treatment systems, raw water is pumped into evaporation tower, tap water is pumped into each tower, evaporation tower T1 is connected with heat exchanger R1, R2-1, R2-2 by pump, R1 is connected with R2-1 and R2-2, R2-1 and R2-2 are connected with evaporation tower T2, T2 is connected with T1 by pump, condensing tower T3 is pumped back to T3 by pump, R1, R3, condensing tower T4, T4 is connected with clean water tank Q between R1 and T3 there is straight-through pipeline, T4 and T2 there is cleaning pipeline, T1 and T2 are connected with concentrated circulating pipeline, pump is arranged on concentrated circulating pipeline, concentrated circulating pipeline is connected with concentrated liquid tank N, each pump is connected with machine seal circulating tank F, air inlet pipeline, T1, T2, T3, T4, air outlet pipeline are sequentially connected.The application can realize multiple processing technology, with machine seal cooling function, can save water, reduce cost, ensure cleaning effect and cleaning efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of evaporation and condensation, in particular to a multi-process high-stability low-temperature evaporation treatment system. BACKGROUND

[0002] Currently, the low-temperature evaporation method is usually used to treat high-salinity liquid. First, the waste liquid is heated to form concentrated liquid and steam. Then, the steam is condensed into liquid by condensation, so that the required substances in the waste liquid can be recycled and reused, and the waste liquid discharge requirements can be met. However, the current treatment system has a single treatment process and cannot be flexibly adjusted according to actual needs. The precipitate is prone to adhere to the tower body at the bottom. Long-term operation of the system can cause the working pump to be continuously high temperature, affecting the service life and thus affecting the treatment effect. A large amount of tap water is generally used when the condensing tower is running, which consumes a large amount of water and increases the treatment cost, and cannot meet the actual production requirements. In addition, the evaporation tower needs to be cleaned after the system is running or has been stopped for a long time. The current system structure not only wastes water during cleaning but also has poor cleaning effect, which can affect the subsequent normal use over time. SUMMARY

[0003] The present application aims to solve the technical problems existing in the prior art and provides a multi-process high-stability low-temperature evaporation treatment system. The system can realize multiple treatment processes and can be flexibly adjusted according to actual needs. Compared with the traditional treatment system, the treatment effect can be greatly improved. At the same time, the system can also prevent the precipitate from adhering to the tower body at the bottom, has a mechanical seal cooling function, saves the use of tap water, reduces the treatment cost, saves the amount of cleaning water, ensures the cleaning effect and cleaning efficiency.

[0004] The technical scheme of the present application is as follows: a multi-process high-stability low-temperature evaporation treatment system, comprising a raw water tank G, a tap water inlet pipe LW-0101, an evaporation tower T1, an evaporation tower T2, a condensing tower T3, a condensing tower T4, a heat exchanger R1, a heat exchanger R2-1, a heat exchanger R2-2, a heat exchanger R3, a fresh air fan F1, a circulating fan F2, a discharge fan F3, a mechanical seal circulating tank F, a concentrated liquid tank N, and a clean water tank Q.

[0005] The raw water tank G is connected to the evaporation tower T1 and the evaporation tower T2 through a raw liquid pump P1, and the tap water inlet pipe LW-0101 is connected to the evaporation tower T1, the evaporation tower T2, the condensing tower T3, and the condensing tower T4.

[0006] The evaporation tower T1 is connected with the raw liquid inlets of the heat exchanger R1, the heat exchanger R2-1 and the heat exchanger R2-2 through a tower one circulating pump P2, the raw liquid outlet of the heat exchanger R1 is connected with the raw liquid inlets of the heat exchanger R2-1 and the heat exchanger R2-2, the raw liquid outlets of the heat exchanger R2-1 and the heat exchanger R2-2 are connected with the evaporation tower T2, and the evaporation tower T2 is further connected with the evaporation tower T1 through a tower two circulating pump P3;

[0007] The condensation tower T3 is connected with the tap water inlet of the heat exchanger R1 through a tower three circulating pump P4, the tap water outlet of the heat exchanger R1 is connected with the tap water inlet of the heat exchanger R3, the tap water outlet of the heat exchanger R3 is connected with the condensation tower T4, the condensation tower T4 is further connected with the condensation tower T3 through a tower four circulating pump P5, and a straight-through pipeline is further connected between the tap water outlet of the heat exchanger R1 and the condensation tower T3, the clean water tank Q is connected with the condensation tower T4, and a pipeline for backwater cleaning of the evaporation tower is further connected between the condensation tower T4 and the evaporation tower T2.

[0008] The bottom of the evaporation tower T1 is connected with a T1 concentrated liquid discharge circulating pipeline, the T1 concentrated liquid discharge circulating pipeline is provided with a concentrated liquid discharge circulating pump P7-1, the bottom of the evaporation tower T2 is connected with a T2 concentrated liquid discharge circulating pipeline, the T2 concentrated liquid discharge circulating pipeline is provided with a concentrated liquid discharge circulating pump P7-2, and the T1 concentrated liquid discharge circulating pipeline and the T2 concentrated liquid discharge circulating pipeline are further connected with the concentrated liquid tank N respectively.

[0009] The raw liquid pump P1, the tower one circulating pump P2, the tower two circulating pump P3, the tower three circulating pump P4, the tower four circulating pump P5, the concentrated liquid discharge circulating pump P7-1 and the concentrated liquid discharge circulating pump P7-2 are connected with the mechanical seal circulating tank F respectively.

[0010] The fresh air fan F1, the evaporation tower T1, the evaporation tower T2, the condensation tower T3, the condensation tower T4 and the exhaust air fan F3 are sequentially connected, the air inlet end of the circulating fan F2 is connected between the condensation tower T4 and the exhaust air fan F3, and the air outlet end of the circulating fan F2 is connected between the fresh air fan F1 and the evaporation tower T1.

[0011] Further, the raw solution pump P1 in the application is connected with the pipeline CWW-0101, the pipeline CWW-0101 is connected with the bottom of the evaporation tower T1 through the pipeline CWW-0102 and the manual butterfly valve DF02, the pipeline CWW-0101 is connected with the bottom of the evaporation tower T2 through the manual butterfly valve DF03 and the pipeline CWW-0103, the tap water inlet pipe LW-0101 is connected with the top of the evaporation tower T1 through the ball valve QF01 and the pipeline LW-0102, the tap water inlet pipe LW-0101 is connected with the top of the evaporation tower T2 through the ball valve QF02 and the pipeline LW-0103, the tap water inlet pipe LW-0101 is connected with the top of the condensation tower T3 through the ball valve QF03 and the pipeline LW-0104, and the tap water inlet pipe LW-0101 is connected with the top of the condensation tower T4 through the ball valve QF04 and the pipeline LW-0105.

[0012] Further, the tower one circulating pump P2 in the application is connected with the bottom of the evaporation tower T1, the tower one circulating pump P2 is also connected with the pipeline CWW-0204 through the pipeline CWW-0202 and the manual butterfly valve DF05, the pipeline CWW-0202 is connected with the raw solution inlet of the heat exchanger R1 through the manual butterfly valve DF06, the pipeline CWW-0204 is connected with the raw solution inlet of the heat exchanger R2-1 through the manual butterfly valve DF08, and the pipeline CWW-0204 is connected with the raw solution inlet of the heat exchanger R2-2 through the manual butterfly valve DF09; the raw solution outlet of the heat exchanger R1 is connected with the pipeline CWW-0204 through the manual butterfly valve DF07 and the pipeline CWW-0203, the raw solution outlet of the heat exchanger R2-1 is connected with the top of the evaporation tower T2 through the manual butterfly valve DF10, the pipeline CWW-0205 and the pipeline CWW-0207, and the raw solution outlet of the heat exchanger R2-2 is connected with the pipeline CWW-0207 through the manual butterfly valve DF11 and the pipeline CWW-0206; the tower two circulating pump P3 is connected between the bottom of the evaporation tower T2 and the top of the evaporation tower T1.

[0013] Further, the tower three circulating pump P4 is connected between the bottom of the condensing tower T3 and the tap water inlet of the heat exchanger R1, the tap water outlet of the heat exchanger R1 is connected with the tap water inlet of the heat exchanger R3 through the manual butterfly valve DF16, and the tap water outlet of the heat exchanger R3 is connected with the top of the condensing tower T4; the tower four circulating pump P5 is connected between the bottom of the condensing tower T4 and the top of the condensing tower T3, the tower four circulating pump P5 is connected with the top of the condensing tower T3 through the pipeline CWW-0502, the manual butterfly valve DF18, the pipeline CWW-0405, the pipeline CWW-0403 connected between the tap water outlet of the heat exchanger R1 and the manual butterfly valve DF16 is connected with the pipeline CWW-0404 through the pneumatic butterfly valve QD07 and the pipeline CWW-0405; the pipeline CWW-0502 is also connected with the pipeline CWW-0207 through the manual butterfly valve DF27 and the pipeline CWW-0503; the bottom of the condensing tower T4 is connected with the clean water tank Q through the manual butterfly valve DF29 and the drainage pump P6.

[0014] Further, the T1 concentration discharge circulating pipeline comprises the manual butterfly valve DF21 connected with one side of the bottom of the evaporation tower T1, the manual butterfly valve DF21 is connected with the concentration discharge circulating pump P7-1 through the pipeline CNW-0101, the concentration discharge circulating pump P7-1 is also connected with the other side of the bottom of the evaporation tower T1 through the check valve ZH07, the pneumatic butterfly valve QD01, the pipeline CNW-0102, and the manual butterfly valve DF23; the T2 concentration discharge circulating pipeline comprises the manual butterfly valve DF24 connected with one side of the bottom of the evaporation tower T2, the manual butterfly valve DF24 is connected with the concentration discharge circulating pump P7-2 through the pipeline CNW-0201, the concentration discharge circulating pump P7-2 is also connected with the other side of the bottom of the evaporation tower T2 through the check valve ZH08, the pneumatic butterfly valve QD04, the pipeline CNW-0202, and the manual butterfly valve DF26; the manual butterfly valve DF22 is connected on the pipeline between the check valve ZH07 and the pneumatic butterfly valve QD01, the manual butterfly valve DF22 is connected with the concentrated liquid tank N through the pneumatic butterfly valve QD02 and the pipeline CNW-0103, the manual butterfly valve DF25 is connected on the pipeline between the check valve ZH08 and the pneumatic butterfly valve QD04, and the manual butterfly valve DF25 is connected with the pipeline CNW-0103 through the pneumatic butterfly valve QD03.

[0015] Further, the water outlet of the machine seal circulating tank F is connected with the pipeline CWR-01 through the circulating water pump P8 and the ball valve QF15, and the water return port of the machine seal circulating tank F is connected with the pipeline CWS-01 through the ball valve QF14; the tower four circulating pump P5 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF28 and the ball valve QF29 respectively, the tower three circulating pump P4 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF26 and the ball valve QF27 respectively, the tower two circulating pump P3 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF24 and the ball valve QF25 respectively, the tower one circulating pump P2 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF22 and the ball valve QF23 respectively, the raw liquid pump P1 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF20 and the ball valve QF21 respectively, the concentration discharge circulating pump P7-1 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF17 and the ball valve QF16 respectively, and the concentration discharge circulating pump P7-2 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF18 and the ball valve QF19 respectively.

[0016] Further, the fresh air fan F1 is connected with the bottom of the evaporation tower T1 through the pipeline GS-0201, the pneumatic butterfly valve QD05 and the pipeline GS-0102, the top of the evaporation tower T1 is connected with the bottom of the evaporation tower T2 through the pipeline GS-0103, the top of the evaporation tower T2 is connected with the bottom of the condensation tower T3 through the pipeline GS-0104, the top of the condensation tower T3 is connected with the bottom of the condensation tower T4 through the pipeline GS-0105, the top of the condensation tower T4 is connected with the exhaust fan F3 through the pipeline GS-0106 and the pneumatic butterfly valve QD06, the air inlet end of the circulating fan F2 is connected with the pipeline GS-0106 through the pipeline GS-0107, the air outlet end of the circulating fan F2 is connected with the pipeline GS-0102 through the pipeline GS-0101, and the pipeline GS-0107 is provided with a remote pressure gauge PI002.

[0017] Further, the steam inlets of the heat exchanger R2-1 and the heat exchanger R2-2 are connected with the pneumatic proportional regulating valve QDT01 through the stop valve JZF01 and the stop valve JZF02 respectively, the pneumatic proportional regulating valve QDT01 is connected with the pipeline LS-0101 for inputting steam through the safety valve ST01, the pipeline LS-0102, the pressure reducing valve JY01 and the stop valve JZF05; the steam outlet of the heat exchanger R2-1 is connected with the pipeline CLW-0101 for outputting steam through the trap SSQ01 and the stop valve JZF03, and the steam outlet of the heat exchanger R2-2 is connected with the pipeline CLW-0101 through the trap SSQ02 and the stop valve JZF04.

[0018] Further, the cooling water inlet of the heat exchanger R3 is connected with the pipeline CWS-0101 for inputting cooling water through the hand-operated butterfly valve DF19 and the pipeline CWS-0102, and the cooling water outlet of the heat exchanger R3 is connected with the pipeline CWR-0102 for outputting cooling water through the hand-operated butterfly valve DF20 and the pipeline CWR-0101.

[0019] Compared with the prior art, the present application has the following advantages: the present application adopts two evaporation towers to circulate and evaporate high-salt liquid, the system operation can be flexibly adjusted according to actual needs, the mechanical seal cooling system is always open during start-up, which can effectively help the mechanical seal of the working pump to cool down and ensure the stable use of the pump, after the system is started and runs, it mainly includes a rapid warming-up stage and a stable running stage, the middle part of each of the four towers is a filler layer, which can expand the surface area of the liquid flowing down from the top of the tower body when the liquid meets the filler, the wind enters from the bottom of the tower body and exits from the top, the liquid in the evaporation tower T1 and the evaporation tower T2 is high-temperature compared with the circulating wind, so that the original liquid is rapidly evaporated, and the original liquid evaporated is carried away by the circulating wind, the liquid in the condensation tower T3 and the condensation tower T4 is low-temperature compared with the circulating wind, so that the water vapor and other substances carried by the circulating wind are rapidly condensed and collected in the condensation tower T3 and the condensation tower T4, which can greatly improve the treatment effect compared with the traditional treatment system; at the same time, the system can effectively circulate the liquid in the tower by increasing the concentrated liquid discharge circulation pipeline, so as to prevent the precipitate from adhering to the tower body; in order to save the use of tap water, a straight-through pipeline is added in the system, the condensation tower T3 is used for separate condensation, and the generated condensate is fully utilized, so as to reduce the treatment cost; after the system is stopped for a long time, tap water or condensate can be selected to circulate and clean the evaporation tower, so as to save the amount of cleaning water, and also ensure the cleaning effect and cleaning efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a connection structure diagram of the treatment system of the present application. DETAILED DESCRIPTION

[0021] The specific embodiments of the present application will be specifically described below in combination with the drawings.

[0022] Embodiment:

[0023] The specific embodiment of a multi-process high-stability low-temperature evaporation treatment system of the present application is shown in the accompanying drawings, and the specific embodiment of the present application will be described in detail with reference to the accompanying drawings. Figure 1 It mainly includes raw water tank G, 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, fresh air fan F1, circulating fan F2, exhaust fan F3, machine seal circulating tank F, concentrated liquid tank N, and clean water tank Q.

[0024] The raw water tank G is connected with the evaporation tower T1 and the evaporation tower T2 respectively, and can respectively introduce the wastewater to be treated into the two evaporation towers. The raw water tank G is connected with the pipeline CWW-0101 through the manual butterfly valve DF01, the flexible joint RJ01, the raw liquid pump P1, the flexible joint RJ02, and the check valve ZH01. The pipeline CWW-0101 is connected with the bottom of the evaporation tower T1 through the pipeline CWW-0102 and the manual butterfly valve DF02. The pipeline CWW-0101 is connected with the bottom of the evaporation tower T2 through the manual butterfly valve DF03 and the pipeline CWW-0103.

[0025] The tap water inlet pipe LW-0101 is connected with the evaporation tower T1, the evaporation tower T2, the condensation tower T3, and the condensation tower T4 respectively. The tap water inlet pipe LW-0101 is connected with the top of the evaporation tower T1 through the ball valve QF01 and the pipeline LW-0102. The tap water inlet pipe LW-0101 is connected with the top of the evaporation tower T2 through the ball valve QF02 and the pipeline LW-0103. The tap water inlet pipe LW-0101 is connected with the top of the condensation tower T3 through the ball valve QF03 and the pipeline LW-0104. The tap water inlet pipe LW-0101 is connected with the top of the condensation tower T4 through the ball valve QF04 and the pipeline LW-0105.

[0026] The bottom of the evaporation tower T1 is connected with the raw liquid inlet of the heat exchanger R1, the heat exchanger R2-1, and the heat exchanger R2-2 respectively. Specifically, the bottom of the evaporation tower T1 is connected with the pipeline CWW-0204 through the manual butterfly valve DF04, the pipeline CWW-0201, the flexible joint RJ03, the tower one circulating pump P2, the flexible joint RJ04, the check valve ZH02, the pipeline CWW-0202, and the manual butterfly valve DF05. The pipeline CWW-0202 is connected with the raw liquid inlet of the heat exchanger R1 through the manual butterfly valve DF06. The pipeline CWW-0204 is connected with the raw liquid inlet of the heat exchanger R2-1 through the manual butterfly valve DF08. The pipeline CWW-0204 is connected with the raw liquid inlet of the heat exchanger R2-2 through the manual butterfly valve DF09.

[0027] The raw liquid outlet of the heat exchanger R1 is connected with the pipeline CWW-0203 and the pipeline CWW-0204 through the manual butterfly valve DF07. The raw liquid outlet of the heat exchanger R2-1 is connected with the top of the evaporation tower T2 through the manual butterfly valve DF10, the pipeline CWW-0205, the pipeline CWW-0207, and the raw liquid outlet of the heat exchanger R2-2 is connected with the pipeline CWW-0206 and the pipeline CWW-0207 through the manual butterfly valve DF11.

[0028] The bottom of the evaporation tower T2 is connected with the top of the evaporation tower T1 through the manual butterfly valve DF12, the pipeline CWW-0301, the flexible joint RJ06, the tower two circulating pump P3, the flexible joint RJ05, the check valve ZH03, the pipeline CWW-0302, and the pipeline CWW-0303, so as to perform the circulating evaporation.

[0029] The bottom of the condensation tower T3 is connected with the tap water inlet of the heat exchanger R1 through the manual butterfly valve DF13, the pipeline CWW-0401, the flexible joint RJ08, the tower three circulating pump P4, the flexible joint RJ07, the check valve ZH04, the manual butterfly valve DF14. The tap water outlet of the heat exchanger R1 is connected with the tap water inlet of the heat exchanger R3 through the manual butterfly valve DF15, the pipeline CWW-0402, and the manual butterfly valve DF16. The tap water outlet of the heat exchanger R3 is connected with the top of the condensation tower T4 through the manual butterfly valve DF17 and the pipeline CWW-0406.

[0030] The bottom of the condensation tower T4 is connected with the top of the condensation tower T3 through the manual butterfly valve DF28, the pipeline CWW-0501, the flexible joint RJ10, the tower four circulating pump P5, the flexible joint RJ09, the check valve ZH05, the pipeline CWW-0502, the manual butterfly valve DF18, and the pipeline CWW-0405.

[0031] A straight-through pipeline is further connected between the tap water outlet of the heat exchanger R1 and the condensation tower T3. Specifically, the pipeline CWW-0402 is connected with the pipeline CWW-0403, and the pipeline CWW-0403 is connected with the pipeline CWW-0404 and the pipeline CWW-0405 through the pneumatic butterfly valve QD07.

[0032] The clean water tank Q is connected with the condensation tower T4. Specifically, the bottom of the condensation tower T4 is connected with the clean water tank Q through the manual butterfly valve DF29 and the drainage pump P6.

[0033] A pipeline for backwater cleaning of the evaporation tower is further connected between the condensation tower T4 and the evaporation tower T2. Specifically, the pipeline CWW-0502 is connected with the pipeline CWW-0503 and the pipeline CWW-0207 through the manual butterfly valve DF27.

[0034] The bottom of the evaporation tower T1 is connected with a T1 concentrated liquid discharge circulation pipeline, and a concentrated liquid discharge circulation pump P7-1 is arranged on the T1 concentrated liquid discharge circulation pipeline. Specifically, the T1 concentrated liquid discharge circulation pipeline comprises a manual butterfly valve DF21 connected with one side of the bottom of the evaporation tower T1, the manual butterfly valve DF21 is connected with the concentrated liquid discharge circulation pump P7-1 through a pipeline CNW-0101, and the concentrated liquid discharge circulation pump P7-1 is further connected with the other side of the bottom of the evaporation tower T1 through a check valve ZH07, an air-operated butterfly valve QD01, a pipeline CNW-0102 and a manual butterfly valve DF23.

[0035] The bottom of the evaporation tower T2 is connected with a T2 concentrated liquid discharge circulation pipeline, and a concentrated liquid discharge circulation pump P7-2 is arranged on the T2 concentrated liquid discharge circulation pipeline. Specifically, the T2 concentrated liquid discharge circulation pipeline comprises a manual butterfly valve DF24 connected with one side of the bottom of the evaporation tower T2, the manual butterfly valve DF24 is connected with the concentrated liquid discharge circulation pump P7-2 through a pipeline CNW-0201, and the concentrated liquid discharge circulation pump P7-2 is further connected with the other side of the bottom of the evaporation tower T2 through a check valve ZH08, an air-operated butterfly valve QD04, a pipeline CNW-0202 and a manual butterfly valve DF26.

[0036] The T1 concentrated liquid discharge circulation pipeline and the T2 concentrated liquid discharge circulation pipeline are further connected with a concentrated liquid tank N, specifically, a manual butterfly valve DF22 is connected with the pipeline between the check valve ZH07 and the air-operated butterfly valve QD01, the manual butterfly valve DF22 is connected with the concentrated liquid tank N through an air-operated butterfly valve QD02 and a pipeline CNW-0103. A manual butterfly valve DF25 is connected with the pipeline between the check valve ZH08 and the air-operated butterfly valve QD04, and the manual butterfly valve DF25 is connected with the pipeline CNW-0103 through an air-operated butterfly valve QD03.

[0037] The stock solution pump P1, the tower one circulating pump P2, the tower two circulating pump P3, the tower three circulating pump P4, the tower four circulating pump P5, the discharge circulating pump P7-1 and the discharge circulating pump P7-2 are connected with the machine seal circulating tank F respectively. Specifically, the water outlet of the machine seal circulating tank F is connected with the pipeline CWR-01 through the circulating water pump P8 and the ball valve QF15, and the water return port of the machine seal circulating tank F is connected with the pipeline CWS-01 through the ball valve QF14. The tower four circulating pump P5 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF28 and the ball valve QF29 respectively, the tower three circulating pump P4 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF26 and the ball valve QF27 respectively, the tower two circulating pump P3 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF24 and the ball valve QF25 respectively, the tower one circulating pump P2 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF22 and the ball valve QF23 respectively, the stock solution pump P1 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF20 and the ball valve QF21 respectively, the discharge circulating pump P7-1 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF17 and the ball valve QF16 respectively, and the discharge circulating pump P7-2 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF18 and the ball valve QF19 respectively.

[0038] The fresh air fan F1, the evaporation tower T1, the evaporation tower T2, the condensation tower T3, the condensation tower T4 and the exhaust air fan F3 are connected in sequence. Specifically, the fresh air fan F1 is connected with the bottom of the evaporation tower T1 through the pipeline GS-0201, the pneumatic butterfly valve QD05 and the pipeline GS-0102, the top of the evaporation tower T1 is connected with the bottom of the evaporation tower T2 through the pipeline GS-0103, the top of the evaporation tower T2 is connected with the bottom of the condensation tower T3 through the pipeline GS-0104, the top of the condensation tower T3 is connected with the bottom of the condensation tower T4 through the pipeline GS-0105, and the top of the condensation tower T4 is connected with the exhaust air fan F3 through the pipeline GS-0106 and the pneumatic butterfly valve QD06.

[0039] The air inlet end of the circulating air fan F2 is connected between the condensation tower T4 and the exhaust air fan F3. Specifically, the air inlet end of the circulating air fan F2 is connected with the pipeline GS-0106 through the pipeline GS-0107. The air outlet end of the circulating air fan F2 is connected between the fresh air fan F1 and the evaporation tower T1. Specifically, the air outlet end of the circulating air fan F2 is connected with the pipeline GS-0102 through the pipeline GS-0101, and the pipeline GS-0107 is further provided with the remote pressure gauge PI002.

[0040] The heat exchanger R2-1 and the heat exchanger R2-2 are connected with a steam pipeline, specifically, the steam inlets of the heat exchanger R2-1 and the heat exchanger R2-2 are connected with the pneumatic proportional regulating valve QDT01 through the stop valve JZF01 and the stop valve JZF02 respectively, the pneumatic proportional regulating valve QDT01 is connected with the pipeline LS-0101 for inputting steam through the safety valve ST01, the pipeline LS-0102, the pressure reducing valve JY01 and the stop valve JZF05. The steam outlet of the heat exchanger R2-1 is connected with the pipeline CLW-0101 for outputting steam through the trap SSQ01 and the stop valve JZF03, and the steam outlet of the heat exchanger R2-2 is connected with the pipeline CLW-0101 through the trap SSQ02 and the stop valve JZF04.

[0041] The heat exchanger R3 is connected with a cooling water pipeline, specifically, the cooling water inlet of the heat exchanger R3 is connected with the pipeline CWS-0102 for inputting cooling water through the manual butterfly valve DF19 and the pipeline CWS-0101, and the cooling water outlet of the heat exchanger R3 is connected with the pipeline CWR-0102 for outputting cooling water through the manual butterfly valve DF20 and the pipeline CWR-0101.

[0042] The system of the application is specifically operated, including the following steps:

[0043] I. Before starting the equipment

[0044] 1.1 Add the original liquid with appropriate liquid level to the evaporation tower T1 through the original water tank G, the manual butterfly valve DF01, the flexible joint RJ01, the original liquid pump P1, the flexible joint RJ02, the check valve ZH01, the pipeline CWW-0101, the pipeline CWW-0102, the manual butterfly valve DF02. The manual butterfly valve DF03 is closed during the whole process.

[0045] 1.2 Add the original liquid with appropriate liquid level to the evaporation tower T2 through the original water tank G, the manual butterfly valve DF01, the flexible joint RJ01, the original liquid pump P1, the flexible joint RJ02, the check valve ZH01, the pipeline CWW-0101, the manual butterfly valve DF03, the pipeline CWW-0103. The manual butterfly valve DF02 is closed during the whole process.

[0046] 1.3 Add tap water with appropriate liquid level to the condensation tower T3 through the pipeline LW-0101, the ball valve QF03 and the pipeline LW-0104.

[0047] 1.4 Add tap water with appropriate liquid level to the condensation tower T4 through the pipeline LW-0101, the ball valve QF04 and the pipeline LW-0105.

[0048] 1.5 The air duct system pneumatic butterfly valve QD05, pneumatic butterfly valve QD06 open, and then start the fresh air fan F1, circulating fan F2, exhaust fan F3. Fresh air is discharged through fresh air fan F1, duct GS-0201, duct GS-0102, evaporative tower T1, duct GS-0103, evaporative tower T2, duct GS-0104, condensing tower T3, duct GS-0105, condensing tower T4, duct GS-0106, exhaust fan F3. After a certain period of time, all are closed.

[0049] II. Equipment startup

[0050] 2.1 Seal cooling system

[0051] The seal circulating water in the seal circulating tank F flows to the fourth tower circulating pump P5 through circulating water pump P8, ball valve QF15, duct CWR-01, ball valve QF28, and then to the seal circulating tank F through ball valve QF29, duct CWS-01, and ball valve QF14. This functions to cool the seal of the fourth tower circulating pump P5.

[0052] The seal circulating water in the seal circulating tank F flows to the third tower circulating pump P4 through circulating water pump P8, ball valve QF15, duct CWR-01, ball valve QF26, and then to the seal circulating tank F through ball valve QF27, duct CWS-01, and ball valve QF14. This functions to cool the seal of the third tower circulating pump P4.

[0053] The seal circulating water in the seal circulating tank F flows to the second tower circulating pump P3 through circulating water pump P8, ball valve QF15, duct CWR-01, ball valve QF24, and then to the seal circulating tank F through ball valve QF25, duct CWS-01, and ball valve QF14. This functions to cool the seal of the second tower circulating pump P3.

[0054] The seal circulating water in the seal circulating tank F flows to the first tower circulating pump P2 through circulating water pump P8, ball valve QF15, duct CWR-01, ball valve QF22, and then to the seal circulating tank F through ball valve QF23, duct CWS-01, and ball valve QF14. This functions to cool the seal of the first tower circulating pump P2.

[0055] The seal circulating water in the seal circulating tank F flows to the raw liquid pump P1 through circulating water pump P8, ball valve QF15, duct CWR-01, ball valve QF20, and then to the seal circulating tank F through ball valve QF21, duct CWS-01, and ball valve QF14. This functions to cool the seal of the raw liquid pump P1.

[0056] The machine seal circulating water in the machine seal circulating tank F flows to the concentration discharge circulating pump P7-1 through the circulating water pump P8, the ball valve QF15, the pipeline CWR-01, the ball valve QF17, and then flows to the machine seal circulating tank F through the ball valve QF16, the pipeline CWS-01, and the ball valve QF14. The function is to cool the machine seal of the concentration discharge circulating pump P7-1.

[0057] The machine seal circulating water in the machine seal circulating tank F flows to the concentration discharge circulating pump P7-2 through the circulating water pump P8, the ball valve QF15, the pipeline CWR-01, the ball valve QF18, and then flows to the machine seal circulating tank F through the ball valve QF19, the pipeline CWS-01, and the ball valve QF14. The function is to cool the machine seal of the concentration discharge circulating pump P7-2.

[0058] Note: The machine seal cooling system is always on during the start-up of the equipment.

[0059] 2.2 Evaporation tower T1, evaporation tower T2, condensation tower T3, condensation tower T4 start-up rapid temperature rising stage

[0060] 2.2.1 The original liquid inside the evaporation tower T1 flows to the top of the evaporation tower T2 through the manual butterfly valve DF04, the pipeline CWW-0201, the soft joint RJ03, the tower one circulating pump P2, the soft joint RJ04, the check valve ZH02, the pipeline CWW-0202, the manual butterfly valve DF05, the pipeline CWW-0204, the manual butterfly valve DF08, the heat exchanger R2-1 (S2 of the heat exchanger R2-1 enters S1), the manual butterfly valve DF10, the pipeline CWW-0205, and the pipeline CWW-0207 at the bottom of the evaporation tower T1. At this time, the manual butterfly valve DF06, the manual butterfly valve DF07, the manual butterfly valve DF09, the manual butterfly valve DF11, and the manual butterfly valve DF27 are closed, the shut-off valve JZF01 and the shut-off valve JZF03 are opened, and the shut-off valve JZF02 and the shut-off valve JZF04 are closed. The original liquid from the evaporation tower T1 to the evaporation tower T2 is heated to the expected evaporation temperature through the heat exchanger R2-1.

[0061] 2.2.2 The original liquid inside the evaporation tower T2 flows to the top of the evaporation tower T1 through the manual butterfly valve DF12, the pipeline CWW-0301, the soft joint RJ06, the tower two circulating pump P3, the soft joint RJ05, the check valve ZH03, and the pipeline CWW-0302 at the bottom of the evaporation tower T2.

[0062] 2.2.3 The tap water in the condensing tower T3 flows from the bottom of the condensing tower T3 to the top of the condensing tower T4 through the manual butterfly valve DF13, the pipeline CWW-0401, the flexible joint RJ08, the tower three circulating pump P4, the flexible joint RJ07, the check valve ZH04, the manual butterfly valve DF14, the heat exchanger R1 (S3 in and S4 out of the heat exchanger R1), the manual butterfly valve DF15, the pipeline CWW-0402, the manual butterfly valve DF16, the heat exchanger R3 (S4 in and S3 out of the heat exchanger R3), the manual butterfly valve DF17, the pipeline CWW-0406. At this time, the pneumatic butterfly valve QD07, the manual butterfly valve DF19, and the manual butterfly valve DF20 are closed.

[0063] 2.2.4 The tap water in the condensing tower T4 flows from the bottom of the condensing tower T4 to the top of the condensing tower T3 through the manual butterfly valve DF28, the pipeline CWW-0501, the flexible joint RJ10, the tower four circulating pump P5, the flexible joint RJ09, the check valve ZH05, the pipeline CWW-0502, the manual butterfly valve DF18, and the pipeline CWW-0405. At this time, the manual butterfly valve DF27 is closed.

[0064] 2.2.5 The steam pipeline discharges the steam into the ditch through the pipeline LS-0101, the stop valve JZF05, the pressure reducing valve JY01, the pipeline LS-0102, the safety valve ST01, the pneumatic proportional regulating valve QDT01, the stop valve JZF01, the heat exchanger R2-1 (S3 in and S4 out of the heat exchanger R2-1), the trap SSQ01, the stop valve JZF03, and the pipeline CLW-0101. At this time, the stop valve JZF02 and the stop valve JZF04 are in the closed state.

[0065] 2.2.6 The cooling water pipeline, the manual butterfly valve DF19 on the pipeline CWS-0102 is closed, and the manual butterfly valve DF20 on the pipeline CWR-0101 is closed.

[0066] 2.2.7 Air duct system, pneumatic butterfly valve QD05, pneumatic butterfly valve QD06 open, restart fresh air fan F1, circulating fan F2, exhaust fan F3, fresh air through fresh air fan F1, pipeline GS-0201, pipeline GS-0102, evaporative tower T1, pipeline GS-0103, evaporative tower T2, pipeline GS-0104, condensing tower T3, pipeline GS-0105, condensing tower T4, pipeline GS-0106, exhaust fan F3 into RTO, after a certain period of time, close fresh air fan F1, exhaust fan F3, pneumatic butterfly valve QD05, pneumatic butterfly valve QD06. At this time, the system air under the action of circulating fan F2, through pipeline GS-0101, pipeline GS-0102, evaporative tower T1, pipeline GS-0103, evaporative tower T2, pipeline GS-0104, condensing tower T3, pipeline GS-0105, condensing tower T4, pipeline GS-0106, pipeline GS-0107 in the order of circulation flow, with the evaporation of evaporative tower T1, evaporative tower T2, the system internal pressure gradually increases (can be obtained through the remote pressure table PI002 on the pipeline GS-0107) to the set value when opening exhaust fan F3, pneumatic butterfly valve QD06, internal air is gradually discharged, when the system internal pressure gradually decreases to the set value, close exhaust fan F3, pneumatic butterfly valve QD06, then open fresh air fan F1, pneumatic butterfly valve QD05, fresh air into the system, the system internal pressure gradually increases to the set value, close fresh air fan F1, pneumatic butterfly valve QD05, with the evaporation of evaporative tower T1, evaporative tower T2, the system internal pressure gradually increases to the set value when opening exhaust fan F3, pneumatic butterfly valve QD06 into the next cycle.

[0067] 2.2.8 No liquid flow in the T1 exhaust concentration circulating pipeline of evaporative tower T1.

[0068] 2.2.9 No liquid flow in the T2 exhaust concentration circulating pipeline of evaporative tower T2.

[0069] 2.2.10 Fresh water pipeline system, with the evaporation of evaporative tower T1, evaporative tower T2, condensation of condensing tower T3, condensing tower T4, the water level of condensing tower T4 rises continuously, when it reaches the set value, the condensate is discharged from manual butterfly valve DF29, drain pump P6 into fresh water tank Q. When the liquid level of condensing tower T4 decreases to the set value, close the drain pump P6.

[0070] 2.2.11 Original liquid pipeline system, with the evaporation of evaporative tower T1, evaporative tower T2, when the liquid level of evaporative tower T1 reaches the set minimum value, add appropriate liquid level of original liquid to evaporative tower T1 through original water tank G, when the liquid level rises to the set value, close the original liquid pump P1. The whole process manual butterfly valve DF03 is closed.

[0071] 2.3 Evaporation tower T1, evaporation tower T2 stable evaporation stage, condensation tower T3, condensation tower T4 stable condensation stage

[0072] 2.3.1 The original liquid in the evaporation tower T1 flows to the top of the evaporation tower T2 through the tower one circulating pump P2, the manual butterfly valve DF06, the heat exchanger R1 (S2 of the heat exchanger R1 in and S1 out), the manual butterfly valve DF07, the pipeline CWW-0203, the pipeline CWW-0204, the manual butterfly valve DF08, the heat exchanger R2-1 (S2 of the heat exchanger R2-1 in and S1 out), the manual butterfly valve DF10, the pipeline CWW-0205, the pipeline CWW-0207 at this time. The manual butterfly valve DF05, the manual butterfly valve DF09, the manual butterfly valve DF11, the manual butterfly valve DF27 are closed, the stop valve JZF01, the stop valve JZF03 are opened, the stop valve JZF02, the stop valve JZF04 are closed. The original liquid from the evaporation tower T1 to the evaporation tower T2 is preheated through the heat exchanger R1, and then the original liquid is further heated to the expected evaporation temperature through the heat exchanger R2-1 (the liquid in the evaporation tower T1, the evaporation tower T2 absorbs the heat of the liquid in the condensation tower T3, the condensation tower T4 through the heat exchanger R1, and the liquid in the evaporation tower T1, the evaporation tower T2 is heated to the set temperature through the heat exchanger R2-1). It should be noted that the heat exchanger R2-2 can be used instead of the heat exchanger R2-1 as needed, the original liquid from S4 of the heat exchanger R2-2 in and S3 out, and the steam pipeline steam from S1 of the heat exchanger R2-2 in and S2 out.

[0073] 2.3.2 Evaporation tower T2 to evaporation tower T1 flow same as 2.2.2

[0074] 2.3.3 Condensation tower T3 to condensation tower T4 flow same as 2.2.3

[0075] 2.3.4 Condensation tower T4 to condensation tower T3 flow same as 2.2.4

[0076] 2.3.5 Steam pipeline same as 2.2.5

[0077] 2.3.6 The manual butterfly valve DF19, the manual butterfly valve DF20 of the cooling water pipeline are opened, and the cooling water flows through the pipeline CWS-0101, the pipeline CWS-0102, the manual butterfly valve DF19, the heat exchanger R3 (S1 of the heat exchanger R3 in and S2 out), the manual butterfly valve DF20, the pipeline CWR-0101, the pipeline CWR-0102 in turn.

[0078] 2.3.7 Air route system same as 2.2.7

[0079] 2.3.8 When the inside of the evaporation tower T1 is lower than the set density value, every certain time, the manual butterfly valve DF21, the pneumatic butterfly valve QD01, the manual butterfly valve DF23, the concentrated liquid discharge circulating pump P7-1 are opened, and the pneumatic butterfly valve QD02 is closed. The raw liquid flows through the manual butterfly valve DF21, the pipeline CNW-0101, the concentrated liquid discharge circulating pump P7-1, the check valve ZH07, the pneumatic butterfly valve QD01, the pipeline CNW-0102, the manual butterfly valve DF23, and returns to the evaporation tower T1, and the set time is stopped. The function is to circulate the liquid in the evaporation tower T1, and prevent the sediment from adhering to the tower body.

[0080] 2.3.9 When the inside of the evaporation tower T2 is lower than the set density value, every certain time, the manual butterfly valve DF24, the pneumatic butterfly valve QD04, the manual butterfly valve DF26, the concentrated liquid discharge circulating pump P7-2 are opened, and the pneumatic butterfly valve QD03 is closed. The raw liquid flows through the manual butterfly valve DF24, the pipeline CNW-0201, the concentrated liquid discharge circulating pump P7-2, the check valve ZH08, the pneumatic butterfly valve QD04, the pipeline CNW-0202, the manual butterfly valve DF26, and returns to the evaporation tower T2, and the set time is stopped. The function is to circulate the liquid in the evaporation tower T2, and prevent the sediment from adhering to the tower body.

[0081] 2.4 Concentrated liquid discharge stage

[0082] When the inside of the evaporation tower T1 or the evaporation tower T2 reaches the set density value, all the devices except the machine seal cooling system are closed, the manual butterfly valve DF21, the concentrated liquid discharge circulating pump P7-1, the manual butterfly valve DF22, the pneumatic butterfly valve QD02 on the T1 concentrated liquid discharge circulating pipeline of the evaporation tower T1 are opened, and the raw liquid flows through the manual butterfly valve DF21, the pipeline CNW-0101, the concentrated liquid discharge circulating pump P7-1, the check valve ZH07, the manual butterfly valve DF22, the pneumatic butterfly valve QD02, and the pipeline CNW-0103 to the concentrated liquid tank N.

[0083] When the inside of the evaporation tower T1 is emptied, the manual butterfly valve DF24, the concentrated liquid discharge circulating pump P7-2, the manual butterfly valve DF25, the pneumatic butterfly valve QD03 on the T2 concentrated liquid discharge circulating pipeline of the evaporation tower T2 are opened, and the raw liquid flows through the manual butterfly valve DF24, the pipeline CNW-0201, the concentrated liquid discharge circulating pump P7-2, the check valve ZH08, the manual butterfly valve DF25, the pneumatic butterfly valve QD03, and the pipeline CNW-0103 to the concentrated liquid tank N.

[0084] The above process is a cycle period, and after the liquid is emptied, the steps 1.1 and 1.2 are repeated, and after the raw liquid is supplemented, the steps 2.2, 2.3 and 2.4 can continue.

[0085] At the system startup, in order to save the use of tap water, the liquid in the condensing tower T3 can flow to the top of the condensing tower T3 through the manual butterfly valve DF13, the pipeline CWW-0401, the flexible joint RJ08, the tower three circulating pump P4, the flexible joint RJ07, the check valve ZH04, the manual butterfly valve DF14, the heat exchanger R1 (S3 in and S4 out of the heat exchanger R1), the manual butterfly valve DF15, the pipeline CWW-0402, the pipeline CWW-0403, the pneumatic butterfly valve QD07, the pipeline CWW-0404, and the pipeline CWW-0405. At this time, the manual butterfly valve DF16 and the tower four circulating pump P5 are closed, which is used to save the use of tap water at the startup. When the condensing tower T3 is condensed to sufficient liquid, the liquid in the condensing tower T3 is transported to the condensing tower T4 through the step 2.2.3, and the manual butterfly valve DF16 and the tower four circulating pump P5 are opened and the pneumatic butterfly valve QD07 is closed until the condensing tower T4 has sufficient liquid level. The liquid in the condensing tower T3 flows according to the step 2.2.3, and the liquid in the condensing tower T4 flows according to the step 2.2.4.

[0086] In the present application, the middle part of the evaporation tower T1, the evaporation tower T2, the condensing tower T3, and the condensing tower T4 is a filler layer, which can expand the surface area of the liquid flowing from the top of the tower. The wind enters from the bottom of the tower and exits from the top. The liquid in the evaporation tower T1 and the evaporation tower T2 has a high temperature compared with the circulating wind, which can rapidly evaporate the original liquid. The circulating wind carries away the evaporated original liquid. The liquid in the condensing tower T3 and the condensing tower T4 has a low temperature compared with the circulating wind, which can rapidly condense the water vapor and other substances carried by the circulating wind and collect them in the condensing tower T3 and the condensing tower T4.

[0087] 2.5 Long time shutdown

[0088] 2.5.1 After the concentration of the evaporation tower T1 and the evaporation tower T2 is completed, all equipment except the mechanical seal cooling system is closed, and an appropriate amount of tap water is added to the evaporation tower T1 through the pipeline LW-0101, the ball valve QF01, and the pipeline LW-0102. An appropriate amount of tap water is added to the evaporation tower T2 through the pipeline LW-0101, the ball valve QF02, and the pipeline LW-0103.

[0089] 2.5.2 Start the subsequent evaporation tower T1, evaporation tower T2 cleaning program, the evaporation tower T1 inside tap water in the evaporation tower T1 bottom through the manual butterfly valve DF04, pipeline CWW-0201, soft connection RJ03, tower one circulating pump P2, soft connection RJ04, check valve ZH02, pipeline CWW-0202, manual butterfly valve DF06, heat exchanger R1, manual butterfly valve DF07, pipeline CWW-0203, pipeline CWW-0204, manual butterfly valve DF08, heat exchanger R2-1, manual butterfly valve DF10, pipeline CWW-0205, pipeline CWW-0207 to the evaporation tower T2 top. At this time, the manual butterfly valve DF05, the manual butterfly valve DF09, the manual butterfly valve DF11, the manual butterfly valve DF27 are closed, the stop valve JZF01, the stop valve JZF03 are opened, and the stop valve JZF02, the stop valve JZF04 are closed. The tap water in the evaporation tower T1 to the evaporation tower T2 is heated through the heat exchanger R2-1 to the expected cleaning temperature. (The tap water in the evaporation tower T1, the evaporation tower T2 is heated through the heat exchanger R2-1 to the set temperature)

[0090] 2.5.3 Evaporation tower T2 to evaporation tower T1 flow same as 2.2.2

[0091] 2.5.4 Steam pipeline same as 2.2.5

[0092] 2.5.5 On the T1 concentration discharge circulating pipeline of the evaporation tower T1, the manual butterfly valve DF21, the concentration discharge circulating pump P7-1, the pneumatic butterfly valve QD01, the manual butterfly valve DF23 are opened, and the pneumatic butterfly valve QD02 is closed. The original liquid flows through the manual butterfly valve DF21, the pipeline CNW-0101, the concentration discharge circulating pump P7-1, the check valve ZH07, the pneumatic butterfly valve QD01, the pipeline CNW-0102, the manual butterfly valve DF23 back to the evaporation tower T1. After the set cleaning time, stop circulating liquid. Its function is to circulate the tap water inside the evaporation tower T1 to prevent sediment from adhering to the tower body.

[0093] 2.5.6 After the set cleaning time is reached, all equipment except the machine seal cooling system is closed, the manual butterfly valve DF21, the concentration discharge circulating pump P7-1, the manual butterfly valve DF22, the pneumatic butterfly valve QD02 are opened, and the tap water flows through the manual butterfly valve DF21, the pipeline CNW-0101, the concentration discharge circulating pump P7-1, the check valve ZH07, the manual butterfly valve DF22, the pneumatic butterfly valve QD02, the pipeline CNW-0103 to the concentrated liquid tank N. After the tap water is discharged, the pneumatic butterfly valve QD02, the concentration discharge circulating pump P7-1 are closed.

[0094] When the tap water in the evaporating tower T1 is exhausted, the manual butterfly valve DF24, the exhaust circulating pump P7-2, the manual butterfly valve DF25 and the pneumatic butterfly valve QD03 on the T2 exhaust circulating pipeline of the evaporating tower T2 are opened, the tap water flows through the manual butterfly valve DF24, the pipeline CNW-0201, the exhaust circulating pump P7-2, the check valve ZH08, the manual butterfly valve DF25, the pneumatic butterfly valve QD03 and the pipeline CNW-0103 to the concentrated liquid tank N. After the original liquid is exhausted, the pneumatic butterfly valve QD03 and the exhaust circulating pump P7-2 are closed. Finally, all the devices are closed. The shutdown process is completed.

[0095] 2.6 Long-time shutdown optimization process

[0096] 2.6.1 Different from 2.5, after the exhaust of the evaporating tower T1 and the evaporating tower T2, all the devices except the mechanical seal cooling system are closed, the tap water in the condensing tower T4 flows to the top of the evaporating tower T2 through the manual butterfly valve DF28, the pipeline CWW-0501, the flexible connection RJ10, the condensing tower four circulating pump P5, the flexible connection RJ09, the check valve ZH05, the pipeline CWW-0502, the manual butterfly valve DF27, the pipeline CWW-0503 and the pipeline CWW-0207 at the bottom of the condensing tower T4. At this time, the manual butterfly valve DF18 is closed.

[0097] The flow of the condensing tower T3 to the condensing tower T4 is the same as 2.2.3

[0098] The flow of the evaporating tower T2 to the evaporating tower T1 is the same as 2.2.2

[0099] According to the flow, the liquid of the condensing tower T3 and the condensing tower T4 flows to the evaporating tower T1 and the evaporating tower T2, and then the process is the same as 2.5.2, 2.5.3, 2.5.4, 2.5.5 and 2.5.6.

[0100] Of course, the above embodiments only illustrate the technical concept and characteristics of the present application, the purpose is to enable the person skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any modification made according to the spirit and essence of the main technical solution of the present application should be covered within the protection scope of the present application.

Claims

1. A multi-process, highly stable low-temperature evaporation treatment system, characterized in that: The system comprises a raw water tank G, a tap water inlet pipe LW-0101, an evaporation tower T1, an evaporation tower T2, a condensation tower T3, a condensation tower T4, a heat exchanger R1, a heat exchanger R2-1, a heat exchanger R2-2, a heat exchanger R3, a fresh air fan F1, a circulating air fan F2, a discharge air fan F3, a machine seal circulating tank F, a concentrated liquid tank N, and a clean water tank Q. The raw water tank G is connected to the evaporation tower T1 and the evaporation tower T2 through a raw liquid pump P1, and the tap water inlet pipe LW-0101 is connected to the evaporation tower T1, the evaporation tower T2, the condensation tower T3, and the condensation tower T4. The evaporation tower T1 is connected to the heat exchanger R1, the heat exchanger R2-1, and the heat exchanger R2-2 through a tower one circulating pump P2, the raw liquid outlet of the heat exchanger R1 is connected to the raw liquid inlets of the heat exchanger R2-1 and the heat exchanger R2-2, the raw liquid outlets of the heat exchanger R2-1 and the heat exchanger R2-2 are connected to the evaporation tower T2, and the evaporation tower T2 is further connected to the evaporation tower T1 through a tower two circulating pump P3. The condensation tower T3 is connected to the tap water inlet of the heat exchanger R1 through a tower three circulating pump P4, 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 condensation tower T4, and the condensation tower T4 is further connected to the condensation tower T3 through a tower four circulating pump P5; a straight-through pipe is further connected between the tap water outlet of the heat exchanger R1 and the condensation tower T3, the clean water tank Q is connected to the condensation tower T4, and a pipe for backwashing the evaporation tower is further connected between the condensation tower T4 and the evaporation tower T2. The bottom of the evaporation tower T1 is connected to a T1 concentrated liquid discharge circulating pipe, and a concentrated liquid discharge circulating pump P7-1 is arranged on the T1 concentrated liquid discharge circulating pipe; the bottom of the evaporation tower T2 is connected to a T2 concentrated liquid discharge circulating pipe, and a concentrated liquid discharge circulating pump P7-2 is arranged on the T2 concentrated liquid discharge circulating pipe; the T1 concentrated liquid discharge circulating pipe and the T2 concentrated liquid discharge circulating pipe are further connected to the concentrated liquid tank N respectively. The raw liquid pump P1, the tower one circulating pump P2, the tower two circulating pump P3, the tower three circulating pump P4, the tower four circulating pump P5, the concentrated liquid discharge circulating pump P7-1, and the concentrated liquid discharge circulating pump P7-2 are connected to the machine seal circulating tank F respectively. The fresh air fan F1, the evaporation tower T1, the evaporation tower T2, the condensation tower T3, the condensation tower T4, and the discharge air fan F3 are connected in sequence, the air inlet end of the circulating air fan F2 is connected between the condensation tower T4 and the discharge air fan F3, and the air outlet end of the circulating air fan F2 is connected between the fresh air fan F1 and the evaporation tower T1.

2. The multi-process high-stability low-temperature evaporation treatment system according to claim 1, characterized in that: The pipeline CWW-0101 is connected with the pipeline CWW-0102, the manual butterfly valve DF02 and the bottom of the evaporation tower T1, the pipeline CWW-0101 is connected with the manual butterfly valve DF03, the pipeline CWW-0103 and the bottom of the evaporation tower T2; the tap water inlet pipe LW-0101 is connected with the ball valve QF01, the pipeline LW-0102 and the top of the evaporation tower T1, the tap water inlet pipe LW-0101 is connected with the ball valve QF02, the pipeline LW-0103 and the top of the evaporation tower T2, the tap water inlet pipe LW-0101 is connected with the ball valve QF03, the pipeline LW-0104 and the top of the condensation tower T3, the tap water inlet pipe LW-0101 is connected with the ball valve QF04, the pipeline LW-0105 and the top of the condensation tower T4.

3. The multi-process high-stability low-temperature evaporation treatment system according to claim 1, characterized in that: The tower one circulating pump P2 is connected with the bottom of the evaporation tower T1, the tower one circulating pump P2 is also connected with the pipeline CWW-0204 through the pipeline CWW-0202, the manual butterfly valve DF05, the pipeline CWW-0202 is connected with the raw liquid inlet of the heat exchanger R1 through the manual butterfly valve DF06, the pipeline CWW-0204 is connected with the raw liquid inlet of the heat exchanger R2-1 through the manual butterfly valve DF08, the pipeline CWW-0204 is connected with the raw liquid inlet of the heat exchanger R2-2 through the manual butterfly valve DF09; the raw liquid outlet of the heat exchanger R1 is connected with the pipeline CWW-0204 through the manual butterfly valve DF07, the pipeline CWW-0203, the raw liquid outlet of the heat exchanger R2-1 is connected with the top of the evaporation tower T2 through the manual butterfly valve DF10, the pipeline CWW-0205, the pipeline CWW-0207, the raw liquid outlet of the heat exchanger R2-2 is connected with the pipeline CWW-0207 through the manual butterfly valve DF11, the pipeline CWW-0206; the tower two circulating pump P3 is connected between the bottom of the evaporation tower T2 and the top of the evaporation tower T1.

4. The multi-process high-stability low-temperature evaporation treatment system according to claim 3, characterized in that: The tower three circulating pump P4 is connected between the bottom of the condensing tower T3 and the tap water inlet of the heat exchanger R1, the tap water outlet of the heat exchanger R1 is connected with the tap water inlet of the heat exchanger R3 through the manual butterfly valve DF16, and the tap water outlet of the heat exchanger R3 is connected with the top of the condensing tower T4; the tower four circulating pump P5 is connected between the bottom of the condensing tower T4 and the top of the condensing tower T3, and the tower four circulating pump P5 is connected with the top of the condensing tower T3 through the pipeline CWW-0502, the manual butterfly valve DF18, the pipeline CWW-0405; the pipeline CWW-0403 is connected between the tap water outlet of the heat exchanger R1 and the manual butterfly valve DF16, and the pipeline CWW-0403 is connected with the pipeline CWW-0405 through the pneumatic butterfly valve QD07 and the pipeline CWW-0404; the pipeline CWW-0502 is also connected with the pipeline CWW-0207 through the manual butterfly valve DF27 and the pipeline CWW-0503; the bottom of the condensing tower T4 is connected with the clean water tank Q through the manual butterfly valve DF29 and the drainage pump P6.

5. The multi-process high-stability low-temperature evaporation treatment system according to claim 1, characterized in that: The T1 concentration discharge circulating pipeline comprises a manual butterfly valve DF21 connected with one side of the bottom of the evaporation tower T1, the manual butterfly valve DF21 is connected with the concentration discharge circulating pump P7-1 through the pipeline CNW-0101, and the concentration discharge circulating pump P7-1 is also connected with the other side of the bottom of the evaporation tower T1 through the check valve ZH07, the pneumatic butterfly valve QD01, the pipeline CNW-0102 and the manual butterfly valve DF23; the T2 concentration discharge circulating pipeline comprises a manual butterfly valve DF24 connected with one side of the bottom of the evaporation tower T2, the manual butterfly valve DF24 is connected with the concentration discharge circulating pump P7-2 through the pipeline CNW-0201, and the concentration discharge circulating pump P7-2 is also connected with the other side of the bottom of the evaporation tower T2 through the check valve ZH08, the pneumatic butterfly valve QD04, the pipeline CNW-0202 and the manual butterfly valve DF26; the pipeline between the check valve ZH07 and the pneumatic butterfly valve QD01 is connected with the manual butterfly valve DF22, the manual butterfly valve DF22 is connected with the concentrated liquid tank N through the pneumatic butterfly valve QD02 and the pipeline CNW-0103, and the pipeline between the check valve ZH08 and the pneumatic butterfly valve QD04 is connected with the manual butterfly valve DF25, and the manual butterfly valve DF25 is connected with the pipeline CNW-0103 through the pneumatic butterfly valve QD03.

6. The multi-process high-stability low-temperature evaporation treatment system according to claim 1, characterized in that: The water outlet of the machine seal circulating tank F is connected with the pipeline CWR-01 through the circulating water pump P8 and the ball valve QF15, and the water return port of the machine seal circulating tank F is connected with the pipeline CWS-01 through the ball valve QF14; the tower four circulating pump P5 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF28 and the ball valve QF29 respectively, the tower three circulating pump P4 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF26 and the ball valve QF27 respectively, the tower two circulating pump P3 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF24 and the ball valve QF25 respectively, the tower one circulating pump P2 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF22 and the ball valve QF23 respectively, the raw liquid pump P1 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF20 and the ball valve QF21 respectively, the concentration discharge circulating pump P7-1 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF17 and the ball valve QF16 respectively, and the concentration discharge circulating pump P7-2 is connected with the pipeline CWR-01 and the pipeline CWS-01 through the ball valve QF18 and the ball valve QF19 respectively.

7. The multi-process high-stability low-temperature evaporation treatment system according to claim 1, characterized in that: The fresh air fan F1 is connected with the bottom of the evaporation tower T1 through the pipeline GS-0201, the pneumatic butterfly valve QD05 and the pipeline GS-0102, the top of the evaporation tower T1 is connected with the bottom of the evaporation tower T2 through the pipeline GS-0103, the top of the evaporation tower T2 is connected with the bottom of the condensation tower T3 through the pipeline GS-0104, the top of the condensation tower T3 is connected with the bottom of the condensation tower T4 through the pipeline GS-0105, the top of the condensation tower T4 is connected with the exhaust air fan F3 through the pipeline GS-0106 and the pneumatic butterfly valve QD06, the air inlet end of the circulating air fan F2 is connected with the pipeline GS-0106 through the pipeline GS-0107, the air outlet end of the circulating air fan F2 is connected with the pipeline GS-0102 through the pipeline GS-0101, and the pipeline GS-0107 is provided with a remote pressure gauge PI002.

8. The multi-process high-stability low-temperature evaporation treatment system according to claim 1, characterized in that: The steam inlets of the heat exchanger R2-1 and the heat exchanger R2-2 are connected with the pneumatic proportional regulating valve QDT01 through the stop valve JZF01 and the stop valve JZF02 respectively, the pneumatic proportional regulating valve QDT01 is connected with the pipeline LS-0101 for steam through the safety valve ST01, the pipeline LS-0102, the pressure reducing valve JY01 and the stop valve JZF05; the steam outlet of the heat exchanger R2-1 is connected with the pipeline CLW-0101 for steam output through the trap SSQ01 and the stop valve JZF03, and the steam outlet of the heat exchanger R2-2 is connected with the pipeline CLW-0101 through the trap SSQ02 and the stop valve JZF04.

9. The multi-process high-stability low-temperature evaporation treatment system according to claim 1, characterized in that: The cooling water inlet of the heat exchanger R3 is connected to the pipe CWS-0101 for inputting cooling water through the manual butterfly valve DF19 and the pipe CWS-0102, and the cooling water outlet of the heat exchanger R3 is connected to the pipe CWR-0102 for outputting cooling water through the manual butterfly valve DF20 and the pipe CWR-0101.

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