High concentration wastewater zero discharge device

Abstract

The utility model discloses a kind of high-concentration wastewater zero discharge devices, it is related to wastewater discharge technical field, including primary evaporation chamber, secondary evaporation chamber, primary heater, secondary heater, preheating box and vapor compressor, the one end of primary heater is fixedly installed with second water outlet pipe, the one side of primary evaporation chamber and secondary evaporation chamber is fixed with circulating pump, the both ends of circulating pump are fixedly installed with second water inlet pipe, between second water inlet pipe and secondary evaporation chamber, third water inlet pipe is fixedly installed, between vapor compressor and primary heater, air inlet pipe is fixedly installed, the upper end of primary evaporation chamber is fixedly installed with first gas pipe, between first gas pipe and secondary heater, second gas pipe is installed, this wastewater zero discharge device uses multistage series evaporation structure, high-concentration wastewater is concentrated gradually, reduce final solid waste production, the waste water to be treated is preheated by collecting waste heat generated in evaporation process.

Description

Technical Field

[0001] This utility model relates to the field of wastewater discharge technology, specifically a zero-discharge device for high-concentration wastewater. Background Technology

[0002] High-concentration wastewater refers to highly polluted wastewater with a chemical oxygen demand exceeding a certain standard. Zero wastewater discharge means that after the water is reused, the salt content and pollutants are highly concentrated and completely recycled and reused, or the insoluble substances are filtered out using a filter press and then recycled, with no waste liquid discharged. The pollutants in the water are concentrated and crystallized or the filter press residue is discharged in solid form and sent to a landfill for disposal or recycled as a useful chemical raw material.

[0003] Chinese Patent Publication No. CN114394640A, authorized on April 26, 2022, discloses a high-concentration wastewater zero-discharge device, comprising a wastewater treatment tank and a base plate, and further comprising: a diversion tank connected to the inner wall of the wastewater treatment tank via a second partition; and a wastewater treatment mechanism connected to both the wastewater treatment tank and the diversion tank. The wastewater treatment mechanism includes a diversion component, a third transmission pipe, and an adsorption component. The diversion component includes a control unit, a diversion cavity, a sealing block, a first elastic element, and a second elastic element. The diversion cavity is circumferentially evenly distributed within the diversion tank. Sealing blocks are slidably installed within the diversion cavity, with a portion of the sealing blocks connected to the control unit via the first elastic element and another portion connected to the diversion cavity via the second elastic element. This invention provides a novel high-concentration wastewater zero-discharge device that improves wastewater treatment efficiency and overall treatment effectiveness.

[0004] Existing zero-discharge wastewater devices use a single-stage evaporation method to concentrate wastewater. The waste heat generated during the evaporation process is not recovered and utilized, which means that the evaporation structure requires more electricity to heat up, reducing the efficiency of heat energy utilization and failing to meet usage requirements. Utility Model Content

[0005] The purpose of this invention is to provide a high-concentration wastewater zero-discharge device to solve the problem mentioned in the background art that the existing wastewater zero-discharge devices use a single-stage evaporation method to concentrate wastewater, and the waste heat generated in the evaporation process is not recovered and utilized, which leads to the evaporation structure requiring more electricity to heat up, reducing the heat energy utilization effect and failing to meet the usage requirements.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-concentration wastewater zero-discharge device, comprising a primary evaporation chamber, a secondary evaporation chamber, a primary heater, a secondary heater, a preheating box, and a steam compressor. A first inlet pipe and a first outlet pipe are fixedly installed on both sides of the heat exchange tube. The preheating box is connected to the primary evaporation chamber via the first outlet pipe. A second outlet pipe is fixedly installed at one end of the primary heater and is connected to the primary evaporation chamber. A circulation pump is fixedly installed on one side of both the primary and secondary evaporation chambers. A second inlet pipe is fixedly installed at both ends of the circulation pump and is connected to the primary heater via the second inlet pipe. A third inlet pipe is fixedly installed between the second inlet pipe and the secondary evaporation chamber. A solenoid valve is fixedly installed on the third inlet pipe. An air inlet pipe is fixedly installed between the steam compressor and the primary heater. A first gas delivery pipe is fixedly installed at the upper end of the primary evaporation chamber and is connected to the preheating box. A second gas delivery pipe is installed between the first gas delivery pipe and the secondary heater.

[0007] Preferably, a heat exchange tube is fixedly installed inside the preheating box, and the first water inlet pipe and the first water outlet pipe are respectively connected to the two ends of the heat exchange tube.

[0008] Preferably, a first condensate outlet pipe is fixedly installed at the lower end of one end of the preheating box.

[0009] Preferably, heat exchange components are fixedly installed inside both the primary heater and the secondary heater.

[0010] Preferably, a second condensate outlet pipe is fixedly installed below one end of both the primary heater and the secondary heater.

[0011] Preferably, both the primary evaporation chamber and the secondary evaporation chamber are equipped with filter heads, and the filter heads are connected to the lower end of the second water inlet pipes extending into the primary and secondary evaporation chambers.

[0012] Preferably, centrifuges are movably installed at the lower ends of both the primary evaporation chamber and the secondary evaporation chamber, and the centrifuges are connected to the primary evaporation chamber and the secondary evaporation chamber.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model device, through the arrangement of a primary evaporation chamber, a secondary evaporation chamber, a primary heater, a secondary heater, and a steam compressor, forms a multi-stage series evaporation structure, which can gradually evaporate and concentrate high-concentration wastewater, thereby reducing the final solid waste production.

[0015] 2. The utility model device, through the setting of a first gas supply pipe and a second gas supply pipe, collects the residual heat energy in the primary evaporation chamber and sends it to the preheating box for preheating treatment of the high-concentration wastewater to be treated through the first gas supply pipe, and sends part of the collected heat energy to the secondary heater to exchange heat with the wastewater, thereby reducing energy consumption. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 For the present utility model Figure 1 A magnified view of a portion of area A;

[0018] Figure 3 This is a cross-sectional view of the preheating box of this utility model;

[0019] Figure 4 This diagram shows the connection relationship between the primary evaporation chamber, the primary heater, and the circulating pump of this utility model.

[0020] In the diagram: 1. Primary evaporation chamber; 2. Secondary evaporation chamber; 3. Primary heater; 4. Secondary heater; 5. Preheating box; 6. First water inlet pipe; 7. First water outlet pipe; 8. First gas supply pipe; 9. Second gas supply pipe; 10. Steam compressor; 11. Gas inlet pipe; 12. Centrifuge; 13. Circulation pump; 14. Second water inlet pipe; 15. Third water inlet pipe; 16. Solenoid valve; 17. First condensate outlet pipe; 18. Heat exchanger pipe; 19. Second condensate outlet pipe; 20. Filter head; 21. Heat exchange assembly; 22. Second water outlet pipe. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see Figure 1-4This utility model provides an embodiment of a high-concentration wastewater zero-discharge device, comprising a primary evaporation chamber 1, a secondary evaporation chamber 2, a primary heater 3, a secondary heater 4, a preheating box 5, and a steam compressor 10. A first inlet pipe 6 and a first outlet pipe 7 are fixedly installed on both sides of the heat exchange tube 18. The preheating box 5 is connected to the primary evaporation chamber 1 via the first outlet pipe 7. A second outlet pipe 22 is fixedly installed at one end of the primary heater 3 and is connected to the primary evaporation chamber 1. A circulating pump is fixed on one side of both the primary evaporation chamber 1 and the secondary evaporation chamber 2. 13. Both ends of the circulating pump 13 are fixedly installed with second water inlet pipes 14, and the circulating pump 13 is connected to the primary heater 3 through the second water inlet pipes 14. The second water inlet pipe 14 is fixedly installed with the secondary evaporation chamber 2 and a third water inlet pipe 15 is fixedly installed. A solenoid valve 16 is fixedly installed on the third water inlet pipe 15. An air inlet pipe 11 is fixedly installed between the steam compressor 10 and the primary heater 3. A first air supply pipe 8 is fixedly installed at the upper end of the primary evaporation chamber 1, and the first air supply pipe 8 is connected to the preheating box 5. A second air supply pipe 9 is installed between the first air supply pipe 8 and the secondary heater 4.

[0023] In use: The high-concentration wastewater to be treated is preheated and sent from the first outlet pipe 7 into the first-stage evaporation chamber 1. The circulation pump 13 is turned on to draw the wastewater from the first-stage evaporation chamber 1 and send it to the first-stage heater 3 through the second inlet pipe 14. The solenoid valve 16 is opened and some wastewater is injected into the second-stage evaporation chamber 2 through the third inlet pipe 15. The wastewater in the second-stage evaporation chamber 2 is sent to the second-stage heater 4 in the same way. The steam compressor 10 is turned on to generate steam. The steam is sent to the first-stage heater 3 through the air inlet pipe 11 to exchange heat with the wastewater. The hot wastewater flows back into the first-stage evaporation chamber 1 from the second outlet pipe 22. The first air supply pipe 8 collects the residual heat energy in the first-stage evaporation chamber 1 and sends it to the preheating box 5 to preheat the high-concentration wastewater to be treated. Through the second air supply pipe 9, some heat energy can also be sent to the second-stage heater 4 to exchange heat with the wastewater. The multi-stage series evaporation structure gradually concentrates the wastewater.

[0024] Please see Figure 1 and Figure 3 The preheating box 5 is equipped with a heat exchange tube 18, and the first water inlet pipe 6 and the first water outlet pipe 7 are respectively connected to the two ends of the heat exchange tube 18. The first condensate outlet pipe 17 is fixedly installed at the bottom of one end of the preheating box 5. High-concentration wastewater flows in the heat exchange tube 18, and the waste heat is sent into the preheating box 5 to contact the heat exchange tube 18. The waste heat generated during the evaporation process is collected to preheat the wastewater to be treated.

[0025] Please see Figure 1 and Figure 4Both the primary heater 3 and the secondary heater 4 have heat exchange components 21 fixedly installed inside them. Both the primary heater 3 and the secondary heater 4 have a second condensate outlet pipe 19 fixedly installed below one end. Wastewater is sent into the heat exchange components 21, and steam is sent into the primary heater 3 and the secondary heater 4 to contact the heat exchange components 21 for heat exchange.

[0026] Please see Figure 1 and Figure 4 Both the primary evaporation chamber 1 and the secondary evaporation chamber 2 are equipped with filter heads 20, and the filter heads 20 are connected to the lower ends of the second water inlet pipes 14 extending into the primary evaporation chamber 1 and the secondary evaporation chamber 2. Centrifuges 12 are movably installed at the lower ends of both the primary evaporation chamber 1 and the secondary evaporation chamber 2, and the centrifuges 12 are connected to the primary evaporation chamber 1 and the secondary evaporation chamber 2. The filter heads 20 filter the extracted wastewater to prevent the evaporated crystals from being sucked into the second water inlet pipes 14 and causing blockage. The centrifuges 12 separate the crystalline mixture after evaporation.

[0027] Working principle: The high-concentration wastewater to be treated is sent from the first inlet pipe 6 into the heat exchange pipe 18 for preheating. The preheated high-concentration wastewater is sent from the first outlet pipe 7 into the first-stage evaporation chamber 1. The circulation pump 13 is turned on to draw the wastewater from the first-stage evaporation chamber 1 and send it to the first-stage heater 3 through the second inlet pipe 14. The solenoid valve 16 is opened and some wastewater is injected into the second-stage evaporation chamber 2 through the third inlet pipe 15. The wastewater in the second-stage evaporation chamber 2 is sent to the second-stage heater 4 in the same way. The steam compressor 10 is turned on to generate steam. The steam is sent to the first-stage heater 3 through the air inlet pipe 11 to exchange heat with the wastewater. The hot wastewater flows back into the first-stage evaporation chamber 1 from the second outlet pipe 22. The first air supply pipe 8 collects the residual heat energy in the first-stage evaporation chamber 1 and sends it to the preheating box 5 to preheat the high-concentration wastewater to be treated. Through the second air supply pipe 9, some heat energy can also be sent to the second-stage heater 4 to exchange heat with the wastewater. The multi-stage series evaporation structure gradually concentrates the wastewater.

[0028] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A zero-discharge device for high-concentration wastewater, comprising a primary evaporation chamber (1), a secondary evaporation chamber (2), a primary heater (3), a secondary heater (4), a preheating box (5), and a steam compressor (10), characterized in that: The preheating box (5) is equipped with a heat exchange tube (18) fixedly installed inside; a first water inlet pipe (6) and a first water outlet pipe (7) are fixedly installed on both sides of the heat exchange tube (18), the preheating box (5) is connected to the first-stage evaporation chamber (1) through the first water outlet pipe (7), a second water outlet pipe (22) is fixedly installed at one end of the first-stage heater (3), and the second water outlet pipe (22) is connected to the first-stage evaporation chamber (1), a circulation pump (13) is fixedly installed on one side of both the first-stage evaporation chamber (1) and the second-stage evaporation chamber (2), and a second water inlet pipe (14) is fixedly installed at both ends of the circulation pump (13), and the circulation pump (13) is connected to the first-stage heater (3) through the first water outlet pipe (7). The second water inlet pipe (14) is connected to the second water inlet pipe (14) and the second water inlet pipe (14) is fixedly installed with a third water inlet pipe (15). A solenoid valve (16) is fixedly installed on the third water inlet pipe (15). An air inlet pipe (11) is fixedly installed between the steam compressor (10) and the first stage heater (3). A first gas delivery pipe (8) is fixedly installed at the upper end of the first stage evaporation chamber (1), and the first gas delivery pipe (8) is connected to the preheating box (5). A second gas delivery pipe (9) is installed between the first gas delivery pipe (8) and the second stage heater (4). The first water inlet pipe (6) and the first water outlet pipe (7) are respectively connected to the two ends of the heat exchange pipe (18).

2. The high-concentration wastewater zero-discharge device according to claim 1, characterized in that: A first condensate outlet pipe (17) is fixedly installed at the bottom of one end of the preheating box (5).

3. The high-concentration wastewater zero-discharge device according to claim 1, characterized in that: Both the primary heater (3) and the secondary heater (4) have heat exchange components (21) fixedly installed inside.

4. The high-concentration wastewater zero-discharge device according to claim 1, characterized in that: A second condensate outlet pipe (19) is fixedly installed below one end of both the primary heater (3) and the secondary heater (4).

5. The high-concentration wastewater zero-discharge device according to claim 1, characterized in that: Both the primary evaporation chamber (1) and the secondary evaporation chamber (2) are equipped with filter heads (20), and the filter heads (20) are connected to the lower end of the second water inlet pipe (14) extending into the primary evaporation chamber (1) and the secondary evaporation chamber (2).

6. The high-concentration wastewater zero-discharge device according to claim 1, characterized in that: Centrifuges (12) are movably installed at the lower ends of the primary evaporation chamber (1) and the secondary evaporation chamber (2), and the centrifuges (12) are connected to the primary evaporation chamber (1) and the secondary evaporation chamber (2).

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