Self-adaptive switching heat supply network draining and desalting system

Abstract

The invention provides a self-adaptive switching heat supply network draining and desalting system. The self-adaptive switching heat supply network draining and desalting system comprises a water inlet pipe, a cation bed, a first branch pipe, an anion bed, a second branch pipe, a mixed bed, a water outlet pipe, a first bypass, a second bypass, a third bypass and a conductivity meter, the water inlet pipe, the cation bed, the first branch pipe, the anion bed, the second branch pipe, the mixed bed and the water outlet pipe are sequentially connected; the input end of the first bypass is connected with the water inlet pipe, and the output end is connected with the second branch pipe; the input end of the second bypass is connected with the first branch pipe, and the output end of the second bypass is connected with the second branch pipe; the input end of the third bypass is connected with the second branch pipe, and the output end of the third bypass is connected with the water outlet pipe; the conductivity meter is arranged on the water inlet pipe; and determining the desalting path of the drainage of the heat supply network according to the water inlet conductivity value and different water outlet quality requirements. The method has the technical effects that different desalting paths of heat supply network drainage can be switched according to the water quality condition of inlet water and different water replenishing position requirements during actual operation, the desalting process of the heat supply network drainage and the corresponding resin regeneration process are mutually standby, the operation is simple, and the cost is saved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of heat network drainage desalination, and particularly relates to a self-adaptive switching heat network drainage desalination system. BACKGROUND

[0002] In recent years, many thermal power units have been gradually reformed for heat supply and steam supply according to local development needs. However, the heat users of some power plants are relatively complex, and the water sources of heat network drainage are numerous, and the water qualities of various heat network drainages are quite different. Taking industrial steam supply heat users as an example, a small amount of intermediate products of industrial users are often contained in heat network drainage, and the content is related to the production capacity of industrial steam supply heat users, and the water quality of heat network drainage varies greatly with seasons, and it is difficult to recover. If not recovered, it will cause waste of water source and heat source, and increase the burden of water production of the power plant, and in the peak period of heat supply, the power plant has to recover part of the heat network drainage due to the limited capacity of desalinated water production, which leads to the deterioration of water and steam quality of the unit and brings safety hazards.

[0003] Therefore, a self-adaptive switching heat network drainage desalination system is urgently needed to balance the reliability of the treatment system when recovering heat network drainage and the economy of the treatment system when the water quality is good and the water quantity is small. SUMMARY

[0004] The application aims to at least solve one of the technical problems in the prior art, and provides a new technical solution of a self-adaptive switching heat network drainage desalination system.

[0005] According to a first aspect of the application, a self-adaptive switching heat network drainage desalination system is provided, comprising: a water inlet pipe, a cation bed, a first branch pipe, an anion bed, a second branch pipe, a mixed bed and a water outlet pipe, which are connected in sequence; a first bypass, a second bypass and a third bypass, the input end of the first bypass is connected with the water inlet pipe, and the output end is connected with the second branch pipe; the input end of the second bypass is connected with the first branch pipe, and the output end is connected with the second branch pipe; the input end of the third bypass is connected with the second branch pipe, and the output end is connected with the water outlet pipe; a conductivity meter, which is arranged on the water inlet pipe; determining a desalination path of the heat network drainage according to the measurement value of the conductivity meter; wherein the desalination path of the heat network drainage comprises a water inlet pipe, a cation bed, an anion bed, a mixed bed and a water outlet pipe; the desalination path of the heat network drainage further comprises a water inlet pipe, a cation bed, a second bypass, a mixed bed and a water outlet pipe; the desalination path of the heat network drainage further comprises a water inlet pipe, a cation bed, an anion bed, a third bypass and a water outlet pipe; The desalination path of the heat network drain also includes an inlet pipe, a first bypass, a mixed bed, and an outlet pipe.

[0006] Optionally, when the measurement value of the conductivity meter is 15-20 us / cm, and the water outlet requirement is extremely high (back to the supercritical unit deaerator), the desalination path of the heat network drain is an inlet pipe, a cation bed, an anion bed, a mixed bed, and an outlet pipe. When the measurement value of the conductivity meter is 10-15 us / cm, and the water outlet requirement is extremely high (back to the supercritical unit deaerator), the desalination path of the heat network drain is an inlet pipe, a cation bed, a second bypass, a mixed bed, and an outlet pipe. When the measurement value of the conductivity meter is 5-10 us / cm, and the water outlet requirement is relatively high (back to the subcritical unit deaerator), the desalination path of the heat network drain is an inlet pipe, a cation bed, an anion bed, a third bypass, and an outlet pipe. When the measurement value of the conductivity meter is less than 5 us / cm, and the water outlet requirement is relatively high (back to the subcritical unit deaerator), the desalination path of the heat network drain is an inlet pipe, a first bypass, a mixed bed, and an outlet pipe.

[0007] Optionally, the self-adaptive switching heat network drain desalination system further includes a first resin trap, a second resin trap, and a third resin trap. The first resin trap is arranged in the first branch pipe. The second resin trap is arranged in the second branch pipe. The third resin trap is arranged in the outlet pipe.

[0008] Optionally, the self-adaptive switching heat network drain desalination system further includes a first inlet valve, a second inlet valve, a third inlet valve, a first outlet valve, a second outlet valve, and a third outlet valve. The first inlet valve is arranged in the inlet pipe and close to the cation bed; the first outlet valve is arranged in the first branch pipe, and the first outlet valve is located between the first resin trap and the anion bed. The second inlet valve is arranged in the first branch pipe and located between the first outlet valve and the anion bed; the second outlet valve is arranged in the second branch pipe, and the second outlet valve is located between the second resin trap and the mixed bed. The third inlet valve is arranged in the second branch pipe and located between the second outlet valve and the mixed bed; the third outlet valve is arranged in the outlet pipe.

[0009] Optionally, the self-adaptive switching heat network drain desalination system further includes a cation bed partitioning electric valve and a cation bed partitioning manual valve. The cation bed partitioning electric valve and the cation bed partitioning manual valve are arranged in the first bypass in the flow direction of the heat network drain in sequence.

[0010] Optionally, the adaptive switching heat network drain desalination system further comprises a first cathode bed bypass manual valve, a cathode bed bypass electric valve and a second cathode bed bypass manual valve. The first cathode bed bypass manual valve, the cathode bed bypass electric valve and the second cathode bed bypass manual valve are sequentially arranged along the flow direction of the heat network drain on the second bypass.

[0011] Optionally, the adaptive switching heat network drain desalination system further comprises a third cathode bed bypass manual valve. The third cathode bed bypass manual valve is arranged on the second bypass, and the third cathode bed bypass manual valve is arranged in parallel with the first cathode bed bypass manual valve, the cathode bed bypass electric valve and the second cathode bed bypass manual valve.

[0012] Optionally, the adaptive switching heat network drain desalination system further comprises a first mixed bed bypass manual valve, a mixed bed bypass electric valve and a second mixed bed bypass manual valve. The first mixed bed bypass manual valve, the mixed bed bypass electric valve and the second mixed bed bypass manual valve are sequentially arranged along the flow direction of the heat network drain on the second bypass.

[0013] Optionally, the adaptive switching heat network drain desalination system further comprises a third mixed bed bypass manual valve. The third mixed bed bypass manual valve is arranged on the second bypass, and the third mixed bed bypass manual valve is arranged in parallel with the first mixed bed bypass manual valve, the mixed bed bypass electric valve and the second mixed bed bypass manual valve.

[0014] Optionally, the adaptive switching heat network drain desalination system further comprises a third branch pipe and a cathode bed water inlet isolation valve. The input end of the third branch pipe is connected to the first branch pipe, and the output end is connected to the input end of the second bypass. The cathode bed water inlet isolation valve is arranged on the third branch pipe.

[0015] One technical effect of the present application is that: In the embodiment of the present application, the desalination path of the heat network drain is determined according to the measurement value of the conductivity meter; wherein the desalination path of the heat network drain comprises a water inlet pipe, an anode bed, a cathode bed, a mixed bed and a water outlet pipe; the desalination path of the heat network drain further comprises a water inlet pipe, an anode bed, a second bypass, a mixed bed and a water outlet pipe; the desalination path of the heat network drain further comprises a water inlet pipe, an anode bed, a cathode bed, a third bypass and a water outlet pipe; the desalination path of the heat network drain further comprises a water inlet pipe, a first bypass, a mixed bed and a water outlet pipe.

[0016] Therefore, the adaptive switching heat network drain water desalination system is reasonable in design, the three-stage system of the anion bed-cation bed-mixed bed is arranged, the three-way bypass system of the first bypass, the second bypass and the third bypass is arranged, and the on-line chemical instrument (i.e. the conductivity instrument) is arranged on the water inlet pipe, so that the different desalination paths of the heat network drain water can be switched according to the water quality of the water inlet in actual operation, the desalination process of the heat network drain water and the corresponding resin regeneration process are used as backup for each other, no standby equipment is arranged, the operation is simple, the cost can be saved, and the reliability of the treatment system when the water quality is poor and the water quantity is large and the economy of the treatment system when the water quality is good and the water quantity is small can be considered at the same time when the heat network drain water is recovered. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a structural schematic diagram of a self-adaptive switching heat network drain water desalination system according to an embodiment of the present application; Figure 2 FIG. 2 is a structural schematic diagram of a self-adaptive switching heat network drain water desalination system according to another embodiment of the present application.

[0018] In the figure: 1, water inlet pipe; 2, anion bed; 3, first branch pipe; 4, cation bed; 5, second branch pipe; 6, mixed bed; 7, water outlet pipe; 8, first bypass; 9, second bypass; 10, third bypass; 111, conductivity instrument; 12, first resin catcher; 13, second resin catcher; 14, third resin catcher; 15, first water inlet valve; 16, second water inlet valve; 17, third water inlet valve; 18, first water outlet valve; 19, second water outlet valve; 20, third water outlet valve; 21, anion bed partition electric valve; 22, anion bed partition manual valve; 23, first cation bed bypass manual valve; 24, cation bed bypass electric valve; 25, second cation bed bypass manual valve; 26, third cation bed bypass manual valve; 27, first mixed bed bypass manual valve; 28, mixed bed bypass electric valve; 29, second mixed bed bypass manual valve; 30, third mixed bed bypass manual valve; 31, third branch pipe; 32, cation bed water inlet partition valve. DETAILED DESCRIPTION

[0019] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement, numerical expressions, and numerical values of components and steps set forth in these embodiments do not limit the scope of the present application unless otherwise specifically stated.

[0020] The embodiments of the present application will be described in detail below with reference to the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are for the purpose of explanation only, and are not to be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of the present application.

[0021] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0022] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0023] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] According to a first aspect of the present application, referring to Figure 1 and Figure 2 , an adaptive switching heat network drainage desalination system is provided, which can switch different heat network drainage desalination paths according to the water quality of the inlet water in actual operation, and has good adaptive effect for the heat network drainage recovery and treatment problem of complex conditions.

[0025] Specifically, the adaptive switching heat network drainage desalination system comprises: The water inlet pipe 1, the cation bed 2, the first branch pipe 3, the anion bed 4, the second branch pipe 5, the mixed bed 6 and the water outlet pipe 7 are sequentially connected; The first bypass 8, the second bypass 9 and the third bypass 10, the input end of the first bypass 8 is connected with the water inlet pipe 1, and the output end is connected with the second branch pipe 5; the input end of the second bypass 9 is connected with the first branch pipe 3, and the output end is connected with the second branch pipe 5; the input end of the third bypass 10 is connected with the second branch pipe 5, and the output end is connected with the water outlet pipe 7; The conductivity meter 111 is arranged on the water inlet pipe 1; The desalination path of the heat network water is determined according to the measurement value of the conductivity meter 111; The desalination path of the heat network water includes the water inlet pipe 1, the cation bed 2, the anion bed 4, the mixed bed 6 and the water outlet pipe 7; The desalination path of the heat network water further includes the water inlet pipe 1, the cation bed 2, the second bypass 9, the mixed bed 6 and the water outlet pipe 7; The desalination path of the heat network water further includes the water inlet pipe 1, the cation bed 2, the anion bed 4, the third bypass 10 and the water outlet pipe 7; The desalination path of the heat network water further includes the water inlet pipe 1, the first bypass 8, the mixed bed 6 and the water outlet pipe 7.

[0026] In the embodiment of the present application, the adaptive switching heat network water desalination system is reasonable in design, which sets a three-stage series system of the cation bed 2-anion bed 4-mixed bed 6, simultaneously sets a three-way bypass system of the first bypass 8, the second bypass 9 and the third bypass 10, and sets an online chemical instrument (i.e. the conductivity meter 111) on the water inlet pipe 1, so that the system can switch different desalination paths of the heat network water according to the water quality of the inlet water in actual operation, and the desalination process of the heat network water and the corresponding resin regeneration process are mutually reserved, without setting standby equipment, which is simple to operate and helps to save cost, and can balance the reliability of the treatment system when the water quality is poor and the water quantity is large and the economy of the treatment system when the water quality is good and the water quantity is small when recovering the heat network water.

[0027] It should be noted that the adaptive switching heat network water desalination system is a three-stage series system (main process) of the cation bed 2-anion bed 4-mixed bed 6, simultaneously sets a three-way bypass system (auxiliary process) of the first bypass 8, the second bypass 9 and the third bypass 10, and the cation bed 2, the anion bed 4 and the mixed bed 6 are not used, which helps to save construction investment and reduce maintenance workload.

[0028] In a specific embodiment, referring to Figure 1 The adaptive switching heat network water desalination system has various operating conditions as follows: The first operating condition: when the water quality of the heat network drainage is very poor and the water quality requirement of the backwater is very high (recycled to the supercritical unit deaerator), the first bypass 8, the second bypass 9 and the third bypass 10 are closed, and the heat network drainage is treated by the process of the positive bed 2-negative bed 4-mixed bed 6.

[0029] Further, the resin of the positive bed 2 and the resin of the negative bed 4 are regenerated synchronously, that is, when the resin is regenerated, the first bypass 8 is opened, the heat network drainage is only treated by the mixed bed 6, after the resin regeneration is completed, the first bypass 8 is closed, and the treatment process of the positive bed 2-negative bed 4-mixed bed 6 is restored. Since the resin of the positive bed 2 and the resin of the negative bed 4 are regenerated synchronously, the resin regeneration time can be saved, the operation time of the mixed bed 6 is shortened, and the regenerated acid and alkali waste water can be neutralized with each other, thereby saving the acid and alkali amount used for neutralizing the waste liquid.

[0030] When the resin of the mixed bed 6 is regenerated, the third bypass 10 is opened, the heat network drainage is treated by the positive bed 2-negative bed 4, after the resin regeneration of the mixed bed 6 is completed, the third bypass 10 is closed, and the treatment process of the positive bed 2-negative bed 4-mixed bed 6 is restored.

[0031] The second operating condition: when the water quality of the heat network drainage is poor and the water quality requirement of the backwater is very high (recycled to the supercritical unit deaerator), the second bypass 9 is opened, the first bypass 8 and the third bypass 10 are closed, and the heat network drainage is treated by the process of the positive bed 2-mixed bed 6.

[0032] Further, when the resin of the positive bed 2 is invalid, the first bypass 8 is opened, the second bypass 9 is closed, the heat network drainage is treated by the mixed bed 6, and the resin regeneration of the positive bed 2 is performed at the same time. When the resin regeneration of the positive bed 2 is completed, the second bypass 9 is opened, the first bypass 8 is closed, and the treatment process of the positive bed 2-mixed bed 6 is restored.

[0033] When the resin of the mixed bed 6 is invalid, the third bypass 10 is opened, the second bypass 9 is closed, the heat network drainage is treated by the positive bed 2-negative bed 4, and the resin regeneration of the mixed bed 6 is performed at the same time. When the resin regeneration of the mixed bed 6 is completed, the second bypass 9 is opened, the third bypass 10 is closed, and the treatment process of the positive bed 2-mixed bed 6 is restored.

[0034] The third operating condition: when the water quality of the heat network drainage is poor and the water quality requirement of the backwater is high (recycled to the supercritical unit deaerator), the third bypass 10 is opened, the first bypass 8 and the second bypass 9 are closed, and the process of the positive bed 2-negative bed 4 is adopted.

[0035] The resin of the positive bed 2 and the resin of the negative bed 4 are regenerated synchronously, when the resin is regenerated, the first bypass 8 is opened, the third bypass 10 is closed, and the heat network drainage is treated by the mixed bed 6; when the resin regeneration is completed, the third bypass 10 is opened, the first bypass 8 is closed, and the treatment process of the positive bed 2-negative bed 4 is restored.

[0036] The fourth operating condition: when the heat supply network water quality is general and the backwater quality requirement is high (recycled to the deaerator of the subcritical unit), the first bypass 8 is opened, the second bypass 9 and the third bypass 10 are closed, and the mixed bed 6 process is adopted.

[0037] When the resin of the mixed bed 6 is invalid, the third bypass 10 is opened, the first bypass 8 is closed, the heat supply network water is treated by the anion bed 2-cation bed 4, the resin regeneration of the mixed bed 6 is completed, the first bypass 8 is opened, the third bypass 10 is closed, and the mixed bed 6 treatment process is restored.

[0038] Optionally, when the measurement value of the conductivity meter 111 is 15-20 us / cm, and the water quality requirement is extremely high (recycled to the deaerator of the supercritical unit), the desalination path of the heat supply network water is the water inlet pipe 1, the anion bed 2, the cation bed 4, the mixed bed 6, and the water outlet pipe 7. When the measurement value of the conductivity meter 111 is 10-15 us / cm, and the water quality requirement is extremely high (recycled to the deaerator of the supercritical unit), the desalination path of the heat supply network water is the water inlet pipe 1, the anion bed 2, the second bypass 9, the mixed bed 6, and the water outlet pipe 7. When the measurement value of the conductivity meter 111 is 5-10 us / cm, and the water quality requirement is high (recycled to the deaerator of the subcritical unit), the desalination path of the heat supply network water is the water inlet pipe 1, the anion bed 2, the cation bed 4, the third bypass 10, and the water outlet pipe 7. When the measurement value of the conductivity meter 111 is less than 5 us / cm, and the water quality requirement is high (recycled to the deaerator of the subcritical unit), the desalination path of the heat supply network water is the water inlet pipe 1, the first bypass 8, the mixed bed 6, and the water outlet pipe 7.

[0039] In the above embodiment, the desalination path of the heat supply network water is determined according to the measurement value of the conductivity meter 111, so that different desalination paths of the heat supply network water can be switched according to the water quality, the operation is convenient, the heat supply network water can be effectively treated, and the reliability of the treatment system when the water quality is poor and the water quantity is large and the economy of the treatment system when the water quality is good and the water quantity is small can be considered at the same time.

[0040] Optionally, the self-adaptive switching heat supply network water desalination system further comprises a first resin catcher 12, a second resin catcher 13, and a third resin catcher 14. The first resin catcher 12 is arranged in the first branch pipe 3. The second resin catcher 13 is arranged in the second branch pipe 5. The third resin catcher 14 is arranged in the water outlet pipe 7.

[0041] In the above-mentioned embodiments, the resin particles in the anion bed 2, the cathode bed 4 and the mixed bed 6 can be effectively prevented from flowing into the subsequent process or being discharged by the respective resin traps, thereby avoiding the loss of resin and saving cost.

[0042] Optionally, the adaptive switching heat network drain desalination system further comprises a first water inlet valve 15, a second water inlet valve 16, a third water inlet valve 17, a first water outlet valve 18, a second water outlet valve 19 and a third water outlet valve 20. The first water inlet valve 15 is arranged on the water inlet pipe 1 and is close to the anion bed 2; the first water outlet valve 18 is arranged on the first branch pipe 3 and is located between the first resin trap 12 and the cathode bed 4. The second water inlet valve 16 is arranged on the first branch pipe 3 and is located between the first water outlet valve 18 and the cathode bed 4; the second water outlet valve 19 is arranged on the second branch pipe 5 and is located between the second resin trap 13 and the mixed bed 6. The third water inlet valve 17 is arranged on the second branch pipe 5 and is located between the second water outlet valve 19 and the mixed bed 6; the third water outlet valve 20 is arranged on the water outlet pipe 7.

[0043] In the above-mentioned embodiments, the respective water inlet valves and the respective water outlet valves facilitate the rapid realization of the treatment of heat network drain by using the anion bed 2-cathode bed 4-mixed bed 6 process.

[0044] For example, the first water inlet valve 15, the second water inlet valve 16, the third water inlet valve 17, the first water outlet valve 18, the second water outlet valve 19 and the third water outlet valve 20 are all pneumatic valves.

[0045] Optionally, the adaptive switching heat network drain desalination system further comprises an anion bed partition electric valve 21 and an anion bed partition manual valve 22. The anion bed partition electric valve 21 and the anion bed partition manual valve 22 are arranged on the first bypass 8 in the flow direction of the heat network drain.

[0046] In the above-mentioned embodiments, the opening or closing state of the first bypass 8 can be quickly adjusted, and the operation is simple. Optionally, the adaptive switching heat network drain desalination system further comprises a first cathode bed bypass manual valve 23, a cathode bed bypass electric valve 24 and a second cathode bed bypass manual valve 25. The first cathode bed bypass manual valve 23, the cathode bed bypass electric valve 24 and the second cathode bed bypass manual valve 25 are arranged on the second bypass 9 in the flow direction of the heat network drain.

[0047] In the above-mentioned embodiments, the second bypass 9 is adjusted by the first cathode bypass manual valve 23, the cathode bypass electric valve 24 and the second cathode bypass manual valve 25, which is simple to operate.

[0048] Optionally, the adaptive switching heat network drain water desalination system further comprises a third cathode bypass manual valve 26. The third cathode bypass manual valve 26 is arranged on the second bypass 9, and the third cathode bypass manual valve 26 is arranged in parallel with the first cathode bypass manual valve 23, the cathode bypass electric valve 24 and the second cathode bypass manual valve 25.

[0049] In the above-mentioned embodiments, the second bypass 9 is quickly opened or closed by the third cathode bypass manual valve 26, which is simple to operate.

[0050] Optionally, the adaptive switching heat network drain water desalination system further comprises a first mixed bed bypass manual valve 27, a mixed bed bypass electric valve 28 and a second mixed bed bypass manual valve 29. The first mixed bed bypass manual valve 27, the mixed bed bypass electric valve 28 and the second mixed bed bypass manual valve 29 are arranged on the second bypass 9 in sequence along the flow direction of the heat network drain water.

[0051] In the above-mentioned embodiments, the third bypass 10 is adjusted by the first mixed bed bypass manual valve 27, the mixed bed bypass electric valve 28 and the second mixed bed bypass manual valve 29, which is simple to operate.

[0052] Optionally, the adaptive switching heat network drain water desalination system further comprises a third mixed bed bypass manual valve 30. The third mixed bed bypass manual valve 30 is arranged on the second bypass 9, and the third mixed bed bypass manual valve 30 is arranged in parallel with the first mixed bed bypass manual valve 27, the mixed bed bypass electric valve 28 and the second mixed bed bypass manual valve 29.

[0053] In the above-mentioned embodiments, the third bypass 10 is quickly opened or closed by the third mixed bed bypass manual valve 30, which is simple to operate.

[0054] Optionally, the adaptive switching heat network drain water desalination system further comprises a third branch pipe 31 and a cathode water inlet cutoff valve 32. The input end of the third branch pipe 31 is connected to the first branch pipe 3, and the output end is connected to the input end of the second bypass 9. The cathode water inlet cutoff valve 32 is arranged on the third branch pipe 31.

[0055] In the above-mentioned embodiments, the cathode water inlet cutoff valve 32 effectively cuts off the delivery of the heat network drain water from the first bypass 8 to the cathode 4, and facilitates the quick switching and selection of the desalination path of the heat network drain water.

[0056] Exemplarily, the water inlet isolation valve 32 of the bed is a pneumatic valve.

[0057] Embodiment 1 Referring to Figure 2 Taking a power plant as an example, it supplies steam to multiple production enterprises in the surrounding industrial park, and the heat network drainage needs to be recovered. The original design is that the heat network drainage is recovered to the condenser after heat exchange and iron removal treatment, and the water quantity is recovered, but the heat is not recovered. With the improvement of production capacity of the production enterprises and the extension of the operation time, the leakage of the user end heat exchanger is intensified, and the substances leaking into the heat network drainage gradually increase, and the simple iron removal treatment cannot meet the requirements of recovery to the condenser, and must be subjected to salt removal treatment. Considering the economy of recovery, the heat network drainage after treatment is required to be recovered to the deaerator. The power plant has both subcritical units and supercritical units, and the heat network drainage after treatment is required to be recovered to the deaerator of the subcritical unit and the deaerator of the supercritical unit. The self-adaptive switching heat network drainage desalination system of the application can completely solve the technical problems faced by the power plant in the heat network drainage recovery process.

[0058] Specifically, first, when the electric conductivity of the heat network drainage of the power plant industrial steam supply is between 15-20 us / cm, and the heat network drainage after treatment needs to be supplemented into the deaerator of the supercritical unit, the first water inlet valve 15, the first water outlet valve 18, the second water inlet valve 16, the second water outlet valve 19, the third water inlet valve 17, and the third water outlet valve 20 are opened, and the valves on the first bypass 8, the valves on the second bypass 9, and the valves on the third bypass 10 are closed, and the heat network drainage is treated by the process of the cation bed 2-anion bed 4-mixed bed 6.

[0059] The resin of the cation bed 2 and the resin of the anion bed 4 can be regenerated synchronously, the cation bed isolation electric valve 21, the cation bed isolation manual valve 22, and the third anion bed bypass manual valve 26 are opened when the resin of the cation bed 2 and the resin of the anion bed 4 are regenerated, and the first water inlet valve 15, the first water outlet valve 18, the second water inlet valve 16, and the second water outlet valve 19 are closed, and the heat network drainage is treated by the mixed bed 6. When the regeneration of the resin of the cation bed 2 and the resin of the anion bed 4 is completed, the first water inlet valve 15, the first water outlet valve 18, the second water inlet valve 16, and the second water outlet valve 19 are opened, and the cation bed isolation electric valve 21, the cation bed isolation manual valve 22, and the third anion bed bypass manual valve 26 are closed, and the treatment process of the cation bed 2-anion bed 4-mixed bed 6 is restored.

[0060] When the resin of the mixed bed 6 is regenerated, the third mixed bed bypass manual valve 30 is opened, the third water inlet valve 17 and the third water outlet valve 20 are closed, and the heat network drainage is treated by the cation bed 2-anion bed 4. When the regeneration of the resin of the mixed bed 6 is completed, the third water inlet valve 17 and the third water outlet valve 20 are opened, and the third mixed bed bypass manual valve 30 is closed, and the treatment process of the cation bed 2-anion bed 4-mixed bed 6 is restored.

[0061] Second, when the heat supply network of the power plant industry steam conductivity between 10 ~ 15 us / cm, and the heat supply network after treatment needs to be added to the supercritical unit deaerator, open the first water inlet valve 15, the first water outlet valve 18, the water inlet valve 32, the third bed bypass manual valve 26, the third water inlet valve 17, the third water outlet valve 20, close the second water inlet valve 16, the second water outlet valve 19, the bed isolation electric valve 21, the bed isolation manual valve 22, the first bed bypass manual valve 23, the bed bypass electric valve 24, the second bed bypass manual valve 25, each valve on the third bypass, using the bed 2-mixed bed 6 process to treat the heat supply network.

[0062] When the resin of the bed 2 is invalid, open the bed isolation electric valve 21, the bed isolation manual valve 22, close the first water inlet valve 15, the first water outlet valve 18, the water inlet valve 32, the heat supply network is treated by the mixed bed 6. The resin regeneration of the bed 2 is completed, the first water inlet valve 15, the first water outlet valve 18, the water inlet valve 32 are opened, the bed isolation electric valve 21, the bed isolation manual valve 22 are closed, and the bed 2-mixed bed 6 process is restored.

[0063] When the resin of the mixed bed 6 is invalid, open the second water inlet valve 16, the second water outlet valve 19, the third mixed bed bypass manual valve 30, close the water inlet valve 32, the third bed bypass manual valve 26, the third water inlet valve 17, the third water outlet valve 20, the heat supply network is treated by the bed 2-bed 4. When the resin regeneration of the mixed bed 6 is completed, the water inlet valve 32, the third bed bypass manual valve 26, the third water inlet valve 17, the third water outlet valve 20 are opened, the second water inlet valve 16, the second water outlet valve 19, the third mixed bed bypass manual valve 30 are closed, and the bed 2-mixed bed 6 process is restored.

[0064] Third, when the heat supply network of the power plant industry steam conductivity between 5 ~ 10 us / cm, and the heat supply network after treatment needs to be added to the subcritical unit deaerator, open the first water inlet valve 15, the first water outlet valve 18, the second water inlet valve 16, the second water outlet valve 19, the third mixed bed bypass manual valve 30, close the third water inlet valve 17, the third water outlet valve 20, the water inlet valve 32, the bed isolation electric valve 21, the bed isolation manual valve 22, each valve on the second bypass 9, using the bed 2-bed 4 process.

[0065] The resin of the anion bed 2 is regenerated synchronously with the resin of the cation bed 4. When the resin is regenerated, the third water inlet valve 17, the third water outlet valve 20, the anion bed partition electric valve 21, the anion bed partition manual valve 22, and the third cation bed bypass manual valve 26 are opened, and the first water inlet valve 15, the first water outlet valve 18, the second water inlet valve 16, the second water outlet valve 19, the anion bed water inlet partition valve 32, and the third mixed bed bypass manual valve 30 are closed. The heat network drain water is treated by the mixed bed 6. When the resin regeneration of the anion bed 2 and the cation bed 4 is completed, the first water inlet valve 15, the first water outlet valve 18, the second water inlet valve 16, the second water outlet valve 19, and the third mixed bed bypass manual valve 30 are opened, and the third water inlet valve 17, the third water outlet valve 20, the anion bed water inlet partition valve 32, the anion bed partition electric valve 21, the anion bed partition manual valve 22, and the third cation bed bypass manual valve 26 are closed. The anion bed 2-cation bed 4 treatment process is resumed.

[0066] Fourth, when the heat network drain water of the power plant industrial steam supply has an electric conductivity of <5 us / cm, and the treated heat network drain water needs to be supplemented into the deaerator of the subcritical unit, the third water inlet valve 17, the third water outlet valve 20, the anion bed partition electric valve 21, the anion bed partition manual valve 22, and the third cation bed bypass manual valve 26 are opened, and the first water inlet valve 15, the first water outlet valve 18, the second water inlet valve 16, the second water outlet valve 19, the anion bed water inlet partition valve 32, the first cation bed bypass manual valve 23, the cation bed bypass electric valve 24, the second cation bed bypass manual valve 25, and the valves on the third bypass 10 are closed. The mixed bed 6 process is adopted.

[0067] When the resin of the mixed bed 6 is invalid, the first water inlet valve 15, the first water outlet valve 18, the second water inlet valve 16, the second water outlet valve 19, and the third mixed bed bypass manual valve 30 are opened, and the third water inlet valve 17, the third water outlet valve 20, the anion bed water inlet partition valve 32, the anion bed partition electric valve 21, the anion bed partition manual valve 22, and the third cation bed bypass manual valve 26 are closed. The heat network drain water is treated by the anion bed 2-cation bed 4. When the resin regeneration of the mixed bed 6 is completed, the third water inlet valve 17, the third water outlet valve 20, the anion bed partition electric valve 21, the anion bed partition manual valve 22, and the third cation bed bypass manual valve 26 are opened, and the first water inlet valve 15, the first water outlet valve 18, the second water inlet valve 16, the second water outlet valve 19, and the third mixed bed bypass manual valve 30 are closed. The mixed bed 6 treatment process is resumed.

[0068] It can be understood that the above embodiments are only exemplary embodiments for illustrating the principles of the present application, and the present application is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and essence of the present application, and these modifications and improvements are also considered to be within the protection scope of the present application.

Claims

1. An adaptive switching thermal network hydrophobic desalination system, characterized in that, include: The system includes an inlet pipe, a cation bed, a first branch pipe, a cation bed, a second branch pipe, a mixed bed, and an outlet pipe, which are connected in sequence. The system comprises a first bypass, a second bypass, and a third bypass. The input end of the first bypass is connected to the inlet pipe, and the output end is connected to the second branch pipe. The input end of the second bypass is connected to the first branch pipe, and the output end is connected to the second branch pipe. The input end of the third bypass is connected to the second branch pipe, and the output end is connected to the outlet pipe. A conductivity meter, wherein the conductivity meter is installed in the water inlet pipe; The desalination path of the heat network condensate is determined based on the measured values ​​of the conductivity meter. The desalination path of the heat network drainage includes an inlet pipe, an cation bed, an anion bed, a mixed bed, and an outlet pipe. The desalination path of the heat network drainage also includes an inlet pipe, an cation bed, a second bypass, a mixed bed, and an outlet pipe; The desalination path of the heating network drainage also includes an inlet pipe, an cation bed, an anion bed, a third bypass, and an outlet pipe; The desalination path of the heat network drainage also includes an inlet pipe, a first bypass, a mixed bed, and an outlet pipe.

2. The adaptive switching thermal network hydrophobic desalination system according to claim 1, characterized in that, When the conductivity meter reading is 15~20 μS / cm and the effluent is required to return to the supercritical unit deaerator, the desalination path of the heat network condensate is: inlet pipe, cation bed, anion bed, mixed bed, and outlet pipe. When the conductivity meter reading is 10~15 μS / cm and the effluent is required to return to the supercritical unit deaerator, the desalination path of the heat network drain is: inlet pipe, cation bed, second bypass, mixed bed, and outlet pipe. When the conductivity meter measures 5~10 μS / cm and the effluent is required to return to the subcritical unit deaerator, the desalination path of the heat network condensate is: inlet pipe, cation bed, anion bed, third bypass, and outlet pipe. When the conductivity meter reading is less than 5 μS / cm and the effluent is required to return to the subcritical unit deaerator, the desalination path of the heat network drain is: inlet pipe, first bypass, mixed bed, and outlet pipe.

3. The adaptive switching thermal network hydrophobic desalination system according to claim 2, characterized in that, It also includes a first resin trap, a second resin trap, and a third resin trap; The first resin catcher is disposed on the first branch pipe; The second resin trap is disposed on the second branch pipe; The third resin catcher is installed in the water outlet pipe.

4. The adaptive switching thermal network hydrophobic desalination system according to claim 3, characterized in that, It also includes a first inlet valve, a second inlet valve, a third inlet valve, a first outlet valve, a second outlet valve, and a third outlet valve; The first inlet valve is located on the inlet pipe and close to the anode bed; the first outlet valve is located on the first branch pipe and is situated between the first resin trap and the anion bed. The second inlet valve is disposed on the first branch pipe and located between the first outlet valve and the anion bed; the second outlet valve is disposed on the second branch pipe and located between the second resin catcher and the mixed bed; The third inlet valve is installed in the second branch pipe and located between the second outlet valve and the mixed bed; the third outlet valve is installed in the outlet pipe.

5. The adaptive switching thermal network hydrophobic desalination system according to claim 4, characterized in that, It also includes electric valves and manual valves for separating male beds; The first bypass is provided with the electric valve and the manual valve for isolating the anode bed in sequence along the flow direction of the heat network drainage.

6. The adaptive switching thermal network hydrophobic desalination system according to claim 5, characterized in that, It also includes a first vaginal bed bypass manual valve, a vaginal bed bypass electric valve, and a second vaginal bed bypass manual valve; Along the flow direction of the heat network drain, the second bypass is provided with the first anion bed bypass manual valve, the anion bed bypass electric valve, and the second anion bed bypass manual valve in sequence.

7. The adaptive switching thermal network hydrophobic desalination system according to claim 6, characterized in that, It also includes a third-cabin bypass manual valve; The third vaginal bed bypass manual valve is located in the second bypass, and the third vaginal bed bypass manual valve is connected in parallel with the first vaginal bed bypass manual valve, the vaginal bed bypass electric valve, and the second vaginal bed bypass manual valve.

8. The adaptive switching thermal network hydrophobic desalination system according to claim 7, characterized in that, It also includes a first mixed bed bypass manual valve, a mixed bed bypass electric valve, and a second mixed bed bypass manual valve; Along the flow direction of the heat network drain, the second bypass is sequentially provided with the first mixed bed bypass manual valve, the mixed bed bypass electric valve, and the second mixed bed bypass manual valve.

9. The adaptive switching thermal network hydrophobic desalination system according to claim 8, characterized in that, It also includes a third mixed bed bypass manual valve; The third mixed bed bypass manual valve is located in the second bypass, and the third mixed bed bypass manual valve is connected in parallel with the first mixed bed bypass manual valve, the mixed bed bypass electric valve, and the second mixed bed bypass manual valve.

10. The adaptive switching thermal network hydrophobic desalination system according to claim 9, characterized in that, It also includes the third branch pipe and the inlet isolation valve for the anion bed; The input end of the third branch is connected to the first branch, and the output end is connected to the input end of the second bypass. The inlet isolation valve for the anal bed is located on the third branch pipe.

Images