Evaporation and concentration device adopting seed crystal method

Abstract

The utility model discloses a seed crystal method evaporation and concentration device which comprises a preheater, a seed crystal adjusting tank, an evaporation and concentration tank and a concentrated solution tank, the preheater is connected with the seed crystal adjusting tank through a high-temperature waste water pipeline, and the seed crystal adjusting tank is connected with the evaporation and concentration tank through a mixed solution pipeline. The evaporation concentration tank is connected with the concentrated solution tank through a concentrated solution pipeline, and the concentrated solution tank is also connected with the seed crystal adjusting tank through a seed crystal liquid recovery pipeline. According to the utility model, the concentrated solution is cured and precipitated, and the concentrated solution with higher concentration and larger crystal particles at the bottom is recovered, so that the crystal grain grading can be realized, high-quality crystal seeds are provided for the system, the operation cost is saved, and the treatment difficulty is reduced; the concentration of the seed crystal is monitored through the suspended matter online analyzer, the concentration of the seed crystal can be conveniently and timely adjusted, the concentration of the seed crystal is kept within the optimal concentration range, scaling can be effectively prevented, and stable operation of the evaporation and concentration system is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of concentration equipment, especially to a crystallization method evaporation concentration device. BACKGROUND

[0002] With the vigorous development of modern industry in China, environmental problems are highlighted, and due to the influence of water resource shortage, realizing zero discharge of high-salt and high-hardness wastewater becomes an important target of industrial enterprises. Due to the large water volume, various types of substances and complex treatment process of high-salt and high-hardness wastewater, in order to reduce the treatment cost, it is usually concentrated and reduced in quantity first, and then the concentrated liquid is treated separately. In order to prevent the scaling of the treatment equipment, the high-salt and high-hardness wastewater needs to be treated by hardness removal, and the existing hardness removal method not only has high reagent cost, but also produces a large amount of sludge, which cannot be recycled and finally can only be treated as solid waste. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the utility model provides a crystallization method evaporation concentration device.

[0004] The utility model discloses a technical scheme that realizes the purpose as follows:

[0005] A crystallization method evaporation concentration device, comprising a preheater, a seed adjustment tank, an evaporation concentration tank and a concentrated liquid tank, the preheater and the seed adjustment tank are connected by a high-temperature wastewater pipeline, the seed adjustment tank and the evaporation concentration tank are connected by a mixed liquid pipeline, the evaporation concentration tank and the concentrated liquid tank are connected by a concentrated liquid pipeline, and the concentrated liquid tank is also connected with the seed adjustment tank by a seed liquid recovery pipeline.

[0006] Further, the seed adjustment tank is provided with a stirring assembly.

[0007] Further, the stirring assembly comprises a motor, a stirring shaft and stirring blades, the stirring shaft is rotatably connected with the seed adjustment tank, the stirring blades are fixed at one end of the stirring shaft, the other end of the stirring shaft penetrates through the top of the seed adjustment tank and is connected with the output shaft of the motor, and the motor is fixed on the top of the seed adjustment tank.

[0008] Further, the stirring blades are two, and the two stirring blades are symmetrically arranged at the end of the stirring shaft.

[0009] Further, the seed adjustment tank is also provided with a suspended solids online analyzer.

[0010] Further, the evaporation concentration tank and the preheater are connected by a high-temperature condensate water pipeline, and the preheater is also connected by a condensate water recovery pipeline.

[0011] Further, a middle part of the concentrated liquid tank is provided with a to-be-treated liquid pipeline, the seed liquid recovery pipeline and the to-be-treated liquid pipeline are communicated through a connecting pipeline, and a valve is arranged on the connecting pipeline.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The utility model discloses a concentrated liquid produced by the evaporation concentration device is matured and precipitated, and the concentrated liquid with higher concentration and larger crystal particles at the bottom is recovered, so that the crystal grain grading can be realized, and high-quality seed crystals are provided for the system, the crystal in the concentrated liquid is used as seed crystal through secondary utilization, the system operation cost is saved, and the processing difficulty of the concentrated liquid is reduced, the concentration of the seed crystal is monitored through the suspended matter on -line analyzer, the concentration of the seed crystal is adjusted in time conveniently, the concentration of the seed crystal in the seed crystal adjusting tank is kept in the optimum concentration range, scale formation can be effectively prevented, and the stable operation of the evaporation concentration system is also favorable. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the utility model;

[0015] In the drawing: 1, preheater;2, seed crystal adjusting tank;21, stirring subassembly;22, suspended matter on -line analyzer;3, evaporation concentration tank;4, concentrated liquid tank;5, high-temperature waste water pipeline;6, mixed liquid pipeline;7, concentrated liquid pipeline;8, seed liquid recovery pipeline;9, high-temperature condensate water pipeline;10, condensate water recovery pipeline;11, to-be-treated liquid pipeline;12, connecting pipeline. DETAILED DESCRIPTION

[0016] In order to facilitate the understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. The preferred embodiments of the utility model are shown in the drawings. However, the utility model can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive.

[0017] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used in this description, the singular forms "a", "an" and "the" include plural references unless the context clearly dictates otherwise.

[0019] Embodiment 1: As shown in a seed method evaporation concentration device, comprising a preheater 1, a seed adjustment tank 2, an evaporation concentration tank 3 and a concentrated liquid tank 4, the preheater 1 is provided with two water inlets and two water outlets, the seed adjustment tank 2 is provided with two water inlets and one water outlet, the seed adjustment tank 2 is filled with seed liquid, and the seed adjustment tank 2 is further provided with a stirring assembly 21 and a suspended matter online analyzer 22; the evaporation concentration tank 3 is provided with one water inlet and two water outlets, wherein the water inlet is located between the two water outlets in the height direction; the concentrated liquid tank 4 is provided with one water inlet and two water outlets, wherein the water inlet is located above the two water outlets. Figure 1

[0020] One of the water outlets of the preheater 1 is connected with one of the water inlets of the seed adjustment tank 2 through a high-temperature waste water pipeline 5, the water outlet of the seed adjustment tank 2 is connected with the water inlet of the evaporation concentration tank 3 through a mixed liquid pipeline 6, the lower water outlet of the evaporation concentration tank 3 is connected with the water inlet of the concentrated liquid tank 4 through a concentrated liquid pipeline 7, the lower water outlet of the concentrated liquid tank 4 is connected with the other water inlet of the seed adjustment tank 2 through a seed liquid recovery pipeline 8, the upper water outlet of the concentrated liquid tank 4 is connected with a to-be-treated liquid pipeline 11, the seed liquid recovery pipeline 8 and the to-be-treated liquid pipeline 11 are communicated through a connecting pipeline 12, the upper water outlet of the evaporation concentration tank 3 is connected with the other water inlet of the preheater 1 through a high-temperature condensate water pipeline 9, and the other water outlet of the preheater 1 is further connected with a condensate water recovery pipeline 10. Valves are respectively arranged on the water inlets, the water outlets and the connecting pipeline 12 in the evaporation concentration device, and the valves are controlled to be opened and closed by corresponding controllers.

[0021] ​The high-salt and high-hardness wastewater to be treated enters into the preheater 1 through one of the water inlets, is heated in the preheater 1, enters into the seed adjusting tank 2 through the high-temperature wastewater pipeline 5, is mixed with the seed liquid in the seed adjusting tank 2, is stirred by the stirring assembly 21 during the mixing process, so that the seed in the mixed liquid is uniformly distributed, and the concentration of the seed is monitored by the suspended solids on-line analyzer 22. In the utility model, the high-salt and high-hardness wastewater is heated first, and then is mixed with the seed liquid, so that the temperature of the mixed liquid is prevented from being reduced due to the mixing of the low-temperature wastewater and the seed liquid, and the activity of the seed is reduced. The mixed liquid in the seed adjusting tank 2 enters into the evaporation and concentration tank 3 through the mixed liquid pipeline 6, is evaporated and concentrated in the evaporation and concentration tank 3 to form concentrated liquid, then enters into the concentrated liquid tank 4 through the concentrated liquid pipeline 7, is aged and precipitated in the concentrated liquid tank 4, and is separated into layers, so that the concentrated liquid with high concentration and large seed particles is at the bottom of the tank body, and the concentrated liquid with low concentration and small seed particles is at the upper part of the tank body. The concentrated liquid at the upper part flows out of the concentrated liquid tank 4 through the to-be-treated liquid pipeline 11 and waits for further treatment, and the concentrated liquid at the bottom is recycled to the seed adjusting tank 2 through the seed liquid recycling pipeline 8 and is mixed with the high-salt and high-hardness wastewater to enter into the next cycle.

[0022] The concentration of the seed is monitored by the suspended solids on-line analyzer 22, the concentration of the seed is adjusted in time, the concentration of the seed in the seed adjusting tank 2 is kept in the optimal concentration range, scale formation is effectively prevented, and stable operation of the evaporation and concentration system is facilitated.

[0023] The concentrated liquid generated by the evaporation and concentration device is aged and precipitated, and the concentrated liquid with high concentration and large seed particles at the bottom is recycled, so that seed grading is realized, high-quality seed is provided for the system, the seed is recycled from the concentrated liquid, the operation cost of the system is saved, the treatment difficulty of the concentrated liquid is reduced, the concentration of the seed is monitored by the suspended solids on-line analyzer 22, the concentration of the seed is adjusted in time, the concentration of the seed in the seed adjusting tank 2 is kept in the optimal concentration range, scale formation is effectively prevented, and stable operation of the evaporation and concentration system is facilitated.

[0024] As Figure 1As shown, the stirring assembly 21 comprises a motor, a stirring shaft and stirring blades, the stirring shaft is rotationally connected with the seed adjusting tank 2, the stirring blades are two and symmetrically arranged at one end of the stirring shaft, the other end of the stirring shaft penetrates through the top of the seed adjusting tank 2 and is connected with the output shaft of the motor, and the motor is fixed on the top of the seed adjusting tank 2. The output shaft of the motor is rotated to drive the stirring shaft and the stirring blades to rotate, and the mixed solution in the seed adjusting tank 2 is stirred to make the crystal seeds in the mixed solution uniformly distributed.

[0025] The above is only the embodiment of the present application, and does not limit the patent range of the present application, and any equivalent mechanism or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A seed crystal evaporation and concentration apparatus, characterized in that, The device includes a preheater, a seed crystal adjustment tank, an evaporation and concentration tank, and a concentrate tank. The preheater and the seed crystal adjustment tank are connected by a high-temperature wastewater pipeline. The seed crystal adjustment tank and the evaporation and concentration tank are connected by a mixed liquid pipeline. The evaporation and concentration tank and the concentrate tank are connected by a concentrate pipeline. The concentrate tank is also connected to the seed crystal adjustment tank through a seed liquid recovery pipeline.

2. The seed crystal evaporation and concentration apparatus as described in claim 1, characterized in that, The seed crystal adjustment tank is equipped with a stirring assembly.

3. The seed crystal evaporation and concentration apparatus as described in claim 2, characterized in that, The stirring assembly includes a motor, a stirring shaft, and stirring blades. The stirring shaft is rotatably connected to the seed crystal adjustment tank. The stirring blades are fixed to one end of the stirring shaft. The other end of the stirring shaft passes through the top of the seed crystal adjustment tank and is connected to the output shaft of the motor. The motor is fixed to the top of the seed crystal adjustment tank.

4. The seed crystal evaporation and concentration apparatus as described in claim 3, characterized in that, There are two stirring blades, which are symmetrically arranged at the ends of the stirring shaft.

5. The seed crystal evaporation and concentration apparatus as described in claim 1, characterized in that, The seed crystal adjustment tank is also equipped with an online suspended matter analyzer.

6. The seed crystal evaporation and concentration apparatus as described in claim 1, characterized in that, A high-temperature condensate pipe is connected between the evaporation and concentration tank and the preheater, and a condensate recovery pipe is also connected to the preheater.

7. The seed crystal evaporation and concentration apparatus as described in claim 1, characterized in that, The concentrated liquid tank is provided with a liquid to be processed pipeline in the middle. The seed liquid recovery pipeline is connected to the liquid to be processed pipeline through a connecting pipeline, and a valve is provided on the connecting pipeline.

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