Sewage evaporative crystallization system capable of supplementing steam for double-effect heater

Abstract

The utility model discloses a sewage evaporative crystallization system capable of supplementing steam for a second-effect heater, which comprises a first-effect separator and a second-effect separator, the first-effect separator is connected with a first-effect heater and a first-effect demister, the second-effect separator is connected with a second-effect heater and a second-effect demister, and the first-effect demister is connected with the first-effect heater and the second-effect demister. And a crystallizer is mounted at the bottom of the second-effect separator. According to the sewage evaporative crystallization system capable of supplementing steam for the double-effect heater, a steam pipeline is additionally arranged on a steam inlet pipeline of the double-effect heater of an original evaporative crystallization system, and the steam pipeline is used for supplementing the steam required by normal operation of the double-effect heater in time under the condition that secondary steam generated by the single-effect separator is insufficient; the double-effect evaporation system can normally produce sodium chloride crystal salt, so that the sewage evaporation system can perform salt separation treatment, the produced sodium chloride crystal salt and calcium chloride crystal salt can be reused, and the sewage effluent treatment cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage evaporation crystallization, in particular to a sewage evaporation crystallization system that can supplement steam for a two-effect heater. Background Technique

[0002] A sewage evaporation crystallization system is a supporting device for sewage evaporation crystallization treatment. The sewage evaporator crystallization treatment process is a technology that separates the solute in wastewater by evaporation and concentration, so that the solute crystallizes and precipitates, which can not only achieve the purpose of wastewater treatment, but also recover useful substances in the wastewater, playing the role of saving resources and environmental protection. With the continuous development of technology, people's requirements for the manufacturing process of sewage evaporation crystallization systems are also getting higher and higher.

[0003] The existing sewage evaporation crystallization system has certain drawbacks when in use. Currently, the two-effect heater of the sewage evaporation crystallization system uses the secondary steam of the first-effect evaporation system. When the proportion of sodium chloride in the concentrated brine of the sewage treatment device increases, the two-effect system cannot effectively separate the mixed salt of sodium chloride and calcium chloride, resulting in the evaporation crystallization output being a mixed salt of sodium chloride and calcium chloride, and the treatment cost of the mixed salt is relatively high, bringing certain adverse effects to the actual use process. Therefore, we propose a sewage evaporation crystallization system that can supplement steam for the two-effect heater. Content of the Utility Model

[0004] Technical problem to be solved: Aiming at the deficiencies of the prior art, the utility model provides a sewage evaporation crystallization system that can supplement steam for a two-effect heater. A steam pipeline is added to the steam inlet pipeline of the two-effect heater in the original evaporation crystallization system, which is used to supplement the steam required for the normal operation of the two-effect heater in a timely manner when the secondary steam generated by the first-effect separator is insufficient, ensuring that the two-effect evaporation system can normally produce sodium chloride crystal salts, so as to realize the salt separation treatment of the sewage evaporation system, enabling the produced sodium chloride crystal salts and calcium chloride crystal salts to be reused, and effectively reducing the sewage treatment cost, and can effectively solve the problems in the background technique.

[0005] Technical solution: To achieve the above purpose, the technical solution adopted by the utility model is: A sewage evaporation crystallization system that can supplement steam for a two-effect heater, including a first-effect separator and a second-effect separator. The first-effect separator is connected with a first-effect heater and a first-effect demister. The second-effect separator is connected with a second-effect heater and a second-effect demister. A crystallizer is installed at the bottom of the second-effect separator, and crystals are positioned between the crystallizer and the second-effect separator. A heating pipeline is connected between the second-effect heater and the second-effect separator. The inlet end of the second-effect heater is connected with a second steam pipeline, and a thermometer, a pressure transmitter and a local pressure gauge are arranged on the second steam pipeline.

[0006] Preferably, the first-effect demister is connected to the second-effect demister. A first steam pipeline is connected between the first-effect demister and the second-effect heater. The second-effect demister is connected to a condenser, and the crystallizer is connected to a thickener.

[0007] Preferably, a temperature monitor is positioned on the inner wall of the second-effect separator, and the temperature monitor is connected to a temperature display controller.

[0008] Preferably, the first-effect demister and the second-effect heater are connected through the first steam pipeline in a through manner, and the output end of the second-effect demister and the input end of the condenser are connected in a through manner.

[0009] Preferably, the temperature monitor monitors the internal temperature of the second-effect separator, and the temperature monitor transmits the temperature data to the temperature display controller for display.

[0010] Preferably, a second steam pipeline is added to the input port of the second-effect heater, and a thermometer, a pressure transmitter and a local pressure gauge are arranged on the second steam pipeline for adjustment.

[0011] Beneficial effects: Compared with the prior art, the present invention provides a sewage evaporation and crystallization system that can supplement steam to a second-effect heater, and has the following beneficial effects: In the sewage evaporation and crystallization system that can supplement steam to a second-effect heater, a steam pipeline is added to the steam inlet pipeline of the second-effect heater in the original evaporation and crystallization system, which is used to supplement the steam required for the normal operation of the second-effect heater in time when the secondary steam generated by the first-effect separator is insufficient, ensuring that the second-effect evaporation system can normally produce sodium chloride crystal salts, so as to realize the salt separation treatment of the sewage evaporation system, enabling the generated sodium chloride crystal salts and calcium chloride crystal salts to be reused, and effectively reducing the sewage treatment cost of the effluent. The entire sewage evaporation and crystallization system has a simple structure, is convenient to operate, and has a better use effect than the traditional method. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the overall structure of a sewage evaporation and crystallization system that can supplement steam to a second-effect heater according to the present invention.

[0013] Figure 2 It is a schematic diagram of the structure of the crystallizer in a sewage evaporation and crystallization system that can supplement steam to a second-effect heater according to the present invention.

[0014] Figure 3 It is a schematic diagram of the structures of the first-effect separator and the second-effect separator in a sewage evaporation and crystallization system that can supplement steam to a second-effect heater according to the present invention.

[0015] In the figure: 1. First-effect separator; 2. First-effect heater; 3. First-effect demister; 4. Heating pipeline; 5. Second-effect separator; 6. Second-effect demister; 7. To condenser; 8. First steam pipeline; 9. Second-effect heater; 10. Second steam pipeline; 11. Thermometer; 12. Pressure transmitter; 13. Local pressure gauge; 14. To thickener; 15. Crystallizer; 16. Crystal; 17. Temperature monitor; 18. Temperature display controller. Detailed implementation mode

[0016] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings and the detailed implementation mode. However, those skilled in the art will understand that the following described embodiments are some embodiments of the present utility model, rather than all embodiments, and are only used to illustrate the present utility model and should not be construed as limiting the scope of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model. For those conditions not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. Those reagents or instruments not specified by the manufacturer can be obtained as conventional products through commercial purchase.

[0017] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0018] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, 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, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0019] As Figures 1-3As shown in the figure, a sewage evaporation and crystallization system for supplementing steam to a two-effect heater includes a first-effect separator 1 and a second-effect separator 5. The first-effect separator 1 is connected to a first-effect heater 2 and a first-effect demister 3. The second-effect separator 5 is connected to a second-effect heater 9 and a second-effect demister 6. A crystallizer 15 is installed at the bottom of the second-effect separator 5, and a crystal 16 is positioned between the crystallizer 15 and the second-effect separator 5. A heating pipeline 4 is connected between the second-effect heater 9 and the second-effect separator 5. The inlet end of the second-effect heater 9 is connected to a second steam pipeline 10, and a thermometer 11, a pressure transmitter 12, and a local pressure gauge 13 are arranged on the second steam pipeline 10. A steam pipeline is added to the steam inlet pipeline of the second-effect heater in the original evaporation and crystallization system, which is used to supplement the steam required for the normal operation of the second-effect heater in time when the secondary steam generated by the first-effect separator is insufficient, ensuring that the second-effect evaporation system can normally produce sodium chloride crystal salt, so as to realize the salt separation treatment of the sewage evaporation system, make the generated sodium chloride crystal salt and calcium chloride crystal salt reusable, and effectively reduce the sewage treatment cost of the effluent.

[0020] Further, the first-effect demister 3 is connected to the second-effect demister 6. A first steam pipeline 8 is connected between the first-effect demister 3 and the second-effect heater 9. The second-effect demister 6 is connected to a condenser 7, and the crystallizer 15 is connected to a thickener 14.

[0021] Further, a temperature monitor 17 is positioned on the inner wall of the second-effect separator 5, and the temperature monitor 17 is connected to a temperature display controller 18.

[0022] Further, the first-effect demister 3 and the second-effect heater 9 are connected through the first steam pipeline 8 in a through connection, and the output end of the second-effect demister 6 is connected to the input end of the condenser 7 in a through connection.

[0023] Further, the temperature monitor 17 monitors the internal temperature of the second-effect separator 5, and the temperature monitor 17 transmits the temperature data to the temperature display controller 18 for display.

[0024] Further, a second steam pipeline 10 is added to the input port of the second-effect heater 9, and a thermometer 11, a pressure transmitter 12, and a local pressure gauge 13 are arranged on the second steam pipeline 10 for adjustment.

[0025] Connect a steam pipeline from the original steam pipeline, reduce the steam pressure to 0.1 MPa through a steam pressure reducing valve, and set up a desuperheating water device to ensure that the steam after pressure reduction is saturated steam. The pipeline is provided with a thermometer, a pressure transmitter, and a local pressure gauge. The opening of the steam regulating valve is controlled by the pressure transmitter, which can effectively control the steam temperature and pressure entering the second-effect heater and prevent overheating and overpressure during the operation of the shell side of the second-effect heater.

[0026] Working principle: The utility model includes a first-effect separator 1, a first-effect heater 2, a first-effect demister 3, a heating pipeline 4, a second-effect separator 5, a second-effect demister 6, a condenser 7, a first steam pipeline 8, a second-effect heater 9, a second steam pipeline 10, a thermometer 11, a pressure transmitter 12, a local pressure gauge 13, a thickener 14, a crystallizer 15, crystals 16, a temperature monitor 17, and a temperature display controller 18. A steam pipeline is added to the steam inlet pipeline of the second-effect heater in the original evaporation crystallization system to supplement the steam required for the normal operation of the second-effect heater in a timely manner when the secondary steam generated by the first-effect separator is insufficient, ensuring that the second-effect evaporation system can normally produce sodium chloride crystal salts, thereby enabling the sewage evaporation system to separate salts, making the generated sodium chloride crystal salts and calcium chloride crystal salts reusable, and effectively reducing the sewage treatment cost of the effluent.

[0027] It should be noted that in this text, relational terms such as first and second (No. 1, No. 2) are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

[0028] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art of this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model claimed.

Claims

1. A sewage evaporation and crystallization system capable of supplementing steam for a second-effect heater, comprising a first-effect separator (1) and a second-effect separator (5), characterized in that: The first-effect separator (1) is connected to a first-effect heater (2) and a first-effect demister (3); the second-effect separator (5) is connected to a second-effect heater (9) and a second-effect demister (6); a crystallizer (15) is installed at the bottom of the second-effect separator (5); a crystallizer (16) is positioned between the crystallizer (15) and the second-effect separator (5); a heating pipe (4) is connected between the second-effect heater (9) and the second-effect separator (5); an inlet end of the second-effect heater (9) is connected to a second steam pipe (10); and a thermometer (11), a pressure transmitter (12) and an on-site pressure gauge (13) are provided on the second steam pipe (10).

2. A sewage evaporation and crystallization system capable of supplementing steam for a two-effect heater according to claim 1, characterized in that: The first-effect demister (3) is connected to the second-effect demister (6), a first steam pipeline (8) is connected between the first-effect demister (3) and the second-effect heater (9), the second-effect demister (6) is connected to a decondenser (7), and the crystallizer (15) is connected to a dethickener (14).

3. A sewage evaporation and crystallization system capable of supplementing steam for a two-effect heater according to claim 1, characterized in that: A temperature monitor (17) is positioned on the inner wall of the secondary effect separator (5), and the temperature monitor (17) is connected to a temperature display controller (18).

4. A sewage evaporation and crystallization system capable of supplementing steam for a two-effect heater according to claim 2, characterized in that: The first-effect demister (3) and the second-effect heater (9) are connected via a first steam pipe (8), and the output end of the second-effect demister (6) is connected via an input end of the decondenser (7).

5. A sewage evaporation and crystallization system capable of supplementing steam for a two-effect heater according to claim 3, characterized in that: The temperature monitor (17) monitors the internal temperature of the secondary effect separator (5), and the temperature monitor (17) transmits temperature data to the temperature display controller (18) for display.

6. A sewage evaporation and crystallization system capable of supplementing steam for a two-effect heater according to claim 1, characterized in that: A second steam pipeline (10) is added to the input port of the second-effect heater (9), and a thermometer (11), a pressure transmitter (12) and an on-site pressure gauge (13) are arranged on the second steam pipeline (10) for adjustment.

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