Papermaking wastewater zero-discharge circulating device

Abstract

The utility model relates to the technical field of wastewater treatment devices, in particular to a zero-discharge circulating device for papermaking wastewater. Comprising a waste water evaporation bin internally provided with heating equipment, the waste water evaporation bin is provided with a liquid inlet valve pipe used for injecting papermaking waste water, the middle assembly comprises a middle bin internally provided with a spiral liquid guide pipe, and the middle bin is communicated and connected with the waste water evaporation bin through a first steam guide pipe; the condensation assembly comprises a condensation vertical bin internally provided with heat conduction fins. A second steam guide pipe and a return valve pipe are mounted between the condensation vertical bin and the middle bin in a communicating manner; according to the papermaking wastewater zero-discharge circulating device, wastewater is evaporated through the wastewater evaporation bin, and the middle assembly and the condensation assembly are arranged in a matched mode, so that rapid condensation and liquefaction of steam can be achieved, clean liquid water capable of being recycled is obtained, the utilization rate of water resources is increased, and the total papermaking water consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment devices, in particular to a zero-discharge circulation device for papermaking wastewater. Background Art

[0002] Zero discharge of papermaking wastewater is of great significance to environmental protection. Currently, there are two main ways to achieve zero discharge of wastewater. One is to reduce wastewater at the source and internally dispose of wastewater. The other is to treat the terminal wastewater with zero discharge. The general method of treating the terminal wastewater with zero discharge is to evaporate and concentrate the wastewater, evaporate the wastewater, and allow the clean water to escape in the form of steam, thereby achieving zero discharge and recycling of wastewater.

[0003] Currently, the papermaking industry consumes a large amount of water resources and is unable to effectively reduce water resources. Therefore, it is considered to achieve zero-discharge treatment of wastewater to obtain water resources that can be recycled and reused to improve the utilization rate of water resources. In view of this, we propose a zero-discharge circulation device for papermaking wastewater. Utility Model Content

[0004] The purpose of the utility model is to solve the deficiencies mentioned in the above background technology and provide a zero-discharge circulation device for papermaking wastewater.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A zero-discharge circulation device for papermaking wastewater comprises a wastewater evaporation chamber with a heating device installed therein, the wastewater evaporation chamber being provided with a liquid inlet valve pipe for injecting papermaking wastewater, and further comprising:

[0007] An intermediate component, comprising an intermediate chamber with a spiral liquid guide tube installed therein, wherein the intermediate chamber is conductively connected to the wastewater evaporation chamber via a first steam conduit;

[0008] Condensation assembly, including a condensation vertical bin with heat-conducting fins installed inside;

[0009] A second steam conduit and a reflux valve pipe are installed between the condensation vertical bin and the intermediate bin.

[0010] Preferably, the intermediate compartment is provided with a steam guide port for conducting connection with the first steam conduit, and an escape port and a return port for conducting connection with the second steam conduit and the return valve pipe respectively;

[0011] A return pipe for connecting to an external circulation pipeline is provided at the bottom of the intermediate bin.

[0012] Preferably, the spiral liquid conduit is provided with a liquid inlet and a liquid outlet for injecting cooling water to recycle steam heat energy.

[0013] Preferably, the condensing vertical bin is provided with an inlet pipe for conducting and connecting to the other end of the second steam conduit, and an outlet pipe for conducting and connecting to the other end of the return valve pipe.

[0014] Preferably, the heat conducting fins are installed in the condensing vertical bin via a plurality of connecting plates;

[0015] The connecting plate is provided with a guide hole.

[0016] Preferably, a branch pipe is provided on the condensation vertical bin, and a pressure relief valve pipe is detachably installed on the branch pipe.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The zero-discharge circulation device for papermaking wastewater evaporates wastewater through a wastewater evaporation bin, and cooperates with an intermediate component and a condensation component to collect steam and realize rapid condensation and liquefaction of the steam, thereby obtaining clean liquid water that can be recycled, which is beneficial to improving water resource utilization and reducing the total water consumption for papermaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 This is one of the schematic diagrams of the overall structure of the utility model;

[0021] Figure 2 This is the second schematic diagram of the overall structure of the utility model;

[0022] Figure 3 This is a cutaway view of the intermediate component of the present utility model;

[0023] Figure 4 This is a cutaway diagram of the condensing component of the present utility model;

[0024] Figure 5 This is a cross-sectional view of the connection relationship between the heat-conducting fins and the connecting plate of the utility model.

[0025] The meaning of each number in the figure is:

[0026] 1. Wastewater evaporation chamber; 101. Liquid inlet valve pipe; 2. First steam conduit;

[0027] 3. Intermediate component; 31. Intermediate chamber; 311. Steam inlet; 312. Return port; 313. Escape port; 314. Return pipe; 32. Spiral liquid guide pipe; 321. Liquid inlet; 322. Liquid outlet;

[0028] 4. Second steam conduit; 5. Return valve pipe;

[0029] 6. Condensation assembly; 61. Condensation vertical bin; 611. Inlet pipe; 612. Outlet pipe; 613. Branch pipe; 62. Heat transfer fin; 63. Connecting plate; 631. Diversion hole; 7. Pressure relief valve pipe. DETAILED DESCRIPTION

[0030] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-5 The present invention describes the above technical solution in detail through the following embodiments:

[0032] A wastewater zero-discharge circulation device is used for the recycling treatment of papermaking wastewater. It achieves zero-discharge circulation of wastewater by evaporating and filtering the wastewater after solid waste is removed. The recyclable water is evaporated and condensed into liquid to achieve circulation. It includes a wastewater evaporation chamber 1 with a heating device installed inside. The wastewater evaporation chamber 1 is provided with a liquid inlet valve pipe 101 for injecting papermaking wastewater. The purpose of the wastewater evaporation chamber 1 is only to heat the wastewater and evaporate it, so that the clean water escapes in the form of steam. It also includes:

[0033] Intermediate component 3, such as Figure 1-Figure 3 The structure shown includes an intermediate chamber 31 with a spiral liquid guide tube 32 installed inside. The intermediate chamber 31 is connected to the wastewater evaporation chamber 1 through the first steam conduit 2, wherein the spiral liquid guide tube 32 is provided with a liquid inlet 321 and a liquid outlet 322 for injecting cooling water to reuse the steam heat energy. The cooling water enters from the liquid inlet 321 and exits from the liquid outlet 322, and can absorb heat while cooling the steam and condensing the steam, so that the liquid in the spiral liquid guide tube 32 is heated and the heat energy can be reused for other required process sections; in this embodiment, the intermediate chamber 31 is provided with a steam guide port 311 for conducting and connecting to the first steam conduit 2, as well as an escape port 313 and a return port 312 for conducting and connecting to the second steam conduit 4 and the return valve pipe 5 respectively; a return pipe 314 for externally connecting to a circulation pipeline is provided at the bottom of the intermediate chamber 31.

[0034] The condensation assembly 6 includes a condensation vertical bin 61 with heat conducting fins 62 installed inside. Figure 1 and Figure 2As shown in the installation relationship, a second steam conduit 4 and a return valve pipe 5 are installed between the condensation vertical bin 61 and the intermediate bin 31 .

[0035] It needs to be explained that the steam condenses in the intermediate bin 31. In order to improve the condensation effect, the condensed steam will escape from the second steam conduit 4 into the condensation vertical bin 61 in time, and the return valve pipe 5 will also escape. However, the condensed water that continues to condense in the condensation vertical bin 61 will directly neutralize the heat and liquefy it. Therefore, the steam in the intermediate bin 31 mainly escapes from the second steam conduit 4 into the condensation vertical bin 61, and the condensation vertical bin 61 is provided with a branch pipe 613, and a pressure relief valve pipe 7 is detachably installed at the branch pipe 613.

[0036] like Figure 4 and Figure 5 As shown in the structure, the condensing vertical bin 61 is provided with an inlet pipe 611 for conducting and connecting the other end of the second steam conduit 4, and an outlet pipe 612 for conducting and connecting the other end of the return valve pipe 5; the heat conducting fin 62 is installed in the condensing vertical bin 61 through a five-layer connecting plate 63. It should be noted that in order to ensure fluidity, the heat conducting fin 62 is as follows. Figure 5 As shown, there is a gap between them; in order to facilitate flow diversion, a diversion hole 631 is provided on the connecting plate 63.

[0037] The papermaking wastewater zero-discharge circulation device of this embodiment has the following working principle: after the wastewater has passed through the impurities, it is injected into the wastewater evaporation chamber 1 through the liquid inlet valve pipe 101. After being heated, the wastewater evaporates and the clean water escapes into the intermediate chamber 31 in the form of steam. It is initially cooled and condensed through heat exchange by the spiral liquid guide pipe 32. At the same time, part of the steam escapes into the condensation vertical chamber 61 again through the second steam conduit 4, and is heat-conducted and contacted by the heat-conducting fins 62. During this process, the pressure relief valve pipe 7 intermittently relieves pressure to ensure that the internal steam pressure does not exceed the critical value, while discharging hot air and maintaining a stable and continuous condensation effect. The condensate flows back through the return valve pipe 5 again, generating convection with the steam escaping therefrom, completing condensation. This condensation does not mean cooling, but is a process of converting steam into liquid water. The liquid water in the intermediate chamber 31 also has temperature, so the spiral liquid guide pipe 32 can continuously exchange heat. At the same time, the liquid water can be discharged through the return pipe 314, realizing the circulation and reuse of the liquid.

[0038] It should be noted that if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A zero-discharge circulation device for papermaking wastewater, comprising a wastewater evaporation chamber (1) with a heating device installed therein, wherein the wastewater evaporation chamber (1) is provided with a liquid inlet valve pipe (101) for injecting papermaking wastewater, characterized in that: Also includes: An intermediate component (3) includes an intermediate chamber (31) with a spiral liquid guide tube (32) installed therein, wherein the intermediate chamber (31) is electrically connected to the wastewater evaporation chamber (1) via a first steam conduit (2); A condensation assembly (6) includes a condensation vertical bin (61) with heat-conducting fins (62) installed therein; A second steam conduit (4) and a return valve pipe (5) are installed between the condensation vertical bin (61) and the intermediate bin (31).

2. The zero-discharge circulation device for papermaking wastewater according to claim 1, characterized in that: The intermediate chamber (31) is provided with a steam guide port (311) for conducting and connecting the first steam conduit (2), and an escape port (313) and a return port (312) for conducting and connecting the second steam conduit (4) and the return valve pipe (5), respectively. A recycling pipe (314) for connecting to an external circulation pipeline is provided at the bottom of the intermediate bin (31).

3. The zero-discharge circulation device for papermaking wastewater according to claim 1, characterized in that: The spiral liquid guide tube (32) is provided with a liquid inlet (321) and a liquid outlet (322) for injecting cooling water to recycle steam heat energy.

4. The zero-discharge circulation device for papermaking wastewater according to claim 2, characterized in that: The condensation vertical bin (61) is provided with an inlet pipe (611) for conducting and connecting to the other end of the second steam conduit (4), and an outlet pipe (612) for conducting and connecting to the other end of the return valve pipe (5).

5. The zero-discharge circulation device for papermaking wastewater according to claim 4, characterized in that: The heat-conducting fins (62) are installed in the condensation vertical bin (61) via a plurality of connecting plates (63); The connecting disk (63) is provided with a flow guide hole (631).

6. The zero-discharge circulation device for papermaking wastewater according to claim 4 or 5, characterized in that: The condensation vertical bin (61) is provided with a branch pipe (613), and a pressure relief valve pipe (7) is detachably installed on the branch pipe (613).

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