Stepless temperature control low-temperature wastewater evaporative crystallization system

Abstract

The utility model provides a stepless temperature control low temperature waste water evaporation crystallization system, including heat pump, evaporation tank, condensation tank, filtering tank, liquid level regulator and heat dissipation fan, heat pump is respectively communicated with evaporation tank and condensation tank through refrigerant pipeline, evaporation tank is communicated with condensation tank through pipeline, condensation tank is communicated with filtering tank through pipeline, liquid level regulator is connected with the liquid level regulator through pipeline, and heat dissipation fan is connected with the liquid level regulator through pipeline. And the liquid level regulator is used for regulating the liquid level in the condensation tank. According to the utility model, the liquid level regulator for stabilizing the liquid level is arranged on the condensation tank, so that the liquid level area of condensed water generated by condensation in the condensation tank is stable, the temperature area of a refrigerant flowing through the condensation tank is stable, and the heat pump does not need frequent temperature regulation operation and is in a stable running state.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection equipment technology, specifically a stepless temperature control low-temperature wastewater evaporation and crystallization system. Background Technology

[0002] In recent years, wastewater evaporation technology has been increasingly applied to difficult-to-treat wastewater. By directly heating or lowering the boiling point of water, the water in the wastewater is evaporated, while organic matter or salts are concentrated. The distilled water is reused in production or discharged after further treatment, while the concentrated liquid is outsourced for treatment.

[0003] Utility model CN221821925U discloses an integrated low-temperature evaporation treatment device for fluorescent flaw detection fluid. The device includes a positioning frame, within which are integrated an evaporator, a condenser, a sand tank, a carbon tank, a compressor, a circulating pump, and a condenser fan. The circulating pump generates negative pressure to draw the waste liquid into the evaporator. The refrigerant pipeline of the compressor passes sequentially through the evaporator, the condenser fan, and the condenser before returning to the compressor. The refrigerant in the evaporator heats the waste liquid, causing the water in the waste liquid to evaporate and enter the condenser. The condenser fan cools the refrigerant. The refrigerant in the condenser condenses the water vapor into water. The condensate in the condenser is filtered through the sand tank and the carbon tank before being discharged. Both the sand tank and the carbon tank are cylindrical, and their top end caps are secured with quick-release clamps. This low-temperature evaporation treatment device can treat fluorescent permeation waste liquid to meet standards for reuse and discharge. It requires a low proportion of concentrated liquid for outsourced treatment, has high treatment efficiency, and low cost.

[0004] However, the above-mentioned treatment equipment still has shortcomings in use: the condensate in the condenser tank is unstable due to the filtration effect of the filter tank. When the water level is unstable, the temperature inside the tank changes significantly, which leads to an imbalance in the operation of the entire heat pump system and makes the heat pump prone to damage.

[0005] Therefore, this utility model provides a stepless temperature control low-temperature wastewater evaporation and crystallization system. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a stepless temperature-controlled low-temperature wastewater evaporation and crystallization system to solve the problems mentioned in the background. This invention has the function of stabilizing the water level in the condenser, so that the ambient temperature in the condenser is stable, enabling the heat pump to operate stably and extending the service life of the heat pump.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a stepless temperature-controlled low-temperature wastewater evaporation and crystallization system, comprising a heat pump, an evaporator, a condenser, a filter, a level regulator, and a cooling fan. The heat pump is connected to the evaporator and the condenser via refrigerant pipelines. The evaporator is connected to the condenser via a pipeline, and the condenser is connected to the filter via a pipeline. The level regulator is used to regulate the liquid level in the condenser, and the cooling fan is used to cool the refrigerant before it enters the condenser.

[0008] Furthermore, the liquid level regulator includes a circulation pump, a liquid level sensor, and a controller. The circulation pump is used to control the circulation flow in the condensate tank, and the liquid level sensor is used to detect the liquid level in the condensate tank. The liquid level sensor is electrically connected to the circulation pump through the controller.

[0009] Furthermore, the outer peripheral wall of the condenser is fixedly provided with a tangentially distributed reflux pipe near the top, and the reflux pipe is connected to the outlet pipe of the circulating pump through an ejector.

[0010] Furthermore, a condensation spiral pipe is provided inside the condenser.

[0011] Furthermore, a positioning tube is fixedly installed in the middle of the condenser, and the outer peripheral wall of the positioning tube is fixedly connected to the condensing spiral pipe through a connecting pipe, and the connecting pipe is connected to the positioning tube and the condensing spiral pipe.

[0012] Furthermore, the cross-section of the condensation spiral pipe is rectangular.

[0013] Furthermore, the evaporator is equipped with a spiral heating pipe for passing refrigerant.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. In this utility model, by setting a liquid level regulator on the condenser to stabilize the liquid level, the liquid level area of ​​the condensate produced by condensation in the condenser is stabilized, and the temperature area of ​​the refrigerant flowing through the condenser is stabilized. As a result, the heat pump does not need to be frequently adjusted in temperature, and the heat pump is in a stable operating state.

[0016] 2. In this utility model, the return pipe for returning condensate on the condenser is configured with a tangential connection, so that the condensate returning into the condenser will not impact the liquid level of the condensate in the condenser, thus keeping the liquid level of the condensate in the condenser in a stable state. This avoids the liquid level sensor frequently controlling the controller to adjust the speed of the circulation pump, thus keeping the circulation pump in a stable operating state. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of a stepless temperature-controlled low-temperature wastewater evaporation and crystallization system according to the present invention;

[0018] Figure 2 for Figure 1 The main view;

[0019] Figure 3 This is a schematic diagram of a spiral heating pipe in a stepless temperature-controlled low-temperature wastewater evaporation and crystallization system according to this utility model.

[0020] Figure 4 This is a schematic diagram of the condensation spiral pipe in a stepless temperature-controlled low-temperature wastewater evaporation and crystallization system according to this utility model.

[0021] In the diagram: 1. Heat pump; 2. Evaporator; 21. Spiral heating pipe; 3. Condenser; 31. Return pipe; 311. Condensation spiral pipe; 32. Positioning pipe; 33. Connecting pipe; 4. Filter tank; 5. Liquid level regulator; 51. Circulation pump; 52. Liquid level sensor; 53. Controller; 6. Cooling fan; 8. Ejector. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Please see Figures 1 to 4 This utility model provides a technical solution: a stepless temperature-controlled low-temperature wastewater evaporation and crystallization system, including a heat pump 1, an evaporator 2, a condenser 3, a filter tank 4, a liquid level regulator 5, and a cooling fan 6. The heat pump 1 is connected to the evaporator 2 and the condenser 3 respectively through refrigerant pipelines. The refrigerant pipelines on the heat pump 1 provide high temperature to the evaporator 2, causing the wastewater in the evaporator 2 to rise in temperature and evaporate. The refrigerant in the refrigerant pipelines on the heat pump 1 rises in temperature after passing through the evaporator 2. The cooling fan 6 is used to dissipate heat and cool the refrigerant entering the condenser 3, thus cooling the refrigerant before it enters the condenser 3. The evaporator 2 is connected to the condenser 3 through pipelines. The steam in the evaporator 2 is drawn into the condenser 3. The low-temperature refrigerant enters the condenser 3 and condenses the steam in the condenser 3. The condenser 3 is connected to the filter tank 4 through pipelines. The condensate in the condenser 3 enters the filter tank 4 by its own weight. The filter tank 4 filters the suspended solids and organic matter in the condensate. The refrigerant that passes through the condenser 3 is returned to the heat pump 1 for heating, and then circulates into the evaporator 2 for heat exchange.

[0024] The liquid level regulator 5 is used to regulate the liquid level in the condenser tank 3, so that the liquid level of the condensate in the condenser tank 3 is at a stable height, so that the ambient temperature in the entire condenser tank 3 is at a stable state, and so that the temperature of the refrigerant flowing back into the heat pump 1 is at an approximately constant state.

[0025] Specifically, the level regulator 5 includes a circulation pump 51, a level sensor 52, and a controller 53. The circulation pump 51 is used to control the circulation flow in the condenser tank 3, and the level sensor 52 is used to detect the level of the liquid in the condenser tank 3. The level sensor 52 is electrically connected to the circulation pump 51 through the controller 53. When the level of the condensate in the condenser tank 3 changes, the controller 53 controls the circulation pump 51 to accelerate and decelerate according to the settings, so that the level of the condensate in the condenser tank 3 is stable. At this time, the temperature of the condensate in the condenser tank 3 and the temperature area above the condensate are stable, thereby making the temperature of the refrigerant flowing through the condenser tank 3 tend to be stable.

[0026] The condenser 3 has a tangentially distributed return pipe 31 fixedly installed near the top on its outer peripheral wall. The return pipe 31 is connected to the outlet pipe of the circulating pump 51 via the ejector 8. The circulating pump 51, in conjunction with the ejector 8, creates a negative pressure environment in the condenser 3, allowing it to draw steam from the evaporator 2 without affecting the circulation of condensate in the condenser 3. Furthermore, the tangentially distributed return pipe 31 ensures that the condensate pumped back into the condenser 3 by the circulating pump 51 flows back along the condenser wall 3, preventing turbulence and fluctuations in the water level within the condenser 3.

[0027] In this embodiment, a condensing spiral pipe 311 is provided inside the condensing tank 3. The condensing spiral pipe 311 is used to flow refrigerant, and the refrigerant exchanges heat with the steam in the condensing tank 3 through the condensing spiral pipe 311.

[0028] Furthermore, a positioning tube 32 is fixedly installed in the middle of the condenser tank 3. The outer peripheral wall of the positioning tube 32 is fixedly connected to the condensing spiral pipe 311 through a connecting tube 33. The connecting tube 33 is connected to the positioning tube 32 and the condensing spiral pipe 311. This arrangement allows some of the refrigerant to enter the connecting tube 33 when it flows through the condensing spiral pipe 311. The flow rate of the refrigerant in the connecting tube 33 is relatively low, which can stabilize the refrigerant temperature. The cross-section of the condensing spiral pipe 311 is rectangular, which can increase the heat exchange area.

[0029] In this embodiment, the evaporator 2 is provided with a spiral heating pipe 21 for passing refrigerant. The spiral heating pipe 21 is used to circulate high-temperature refrigerant, and the spiral heating pipe 21 can increase the heat exchange area between the high-temperature refrigerant and the wastewater.

[0030] Working principle: After the refrigerant enters the condenser tank 3, it will condense the high-temperature steam through the condensing spiral pipe 311. A large amount of condensate will accumulate at the bottom of the condenser tank 3. The condensate will flow down to the filter tank 4 by its own weight. When the liquid level in the condenser tank 3 changes due to the flow rate of the condensate discharge, the liquid level sensor 52 detects this change. The controller 53 controls the rotation speed of the circulation pump 51, so that the flow rate of the condensate circulation in the condenser tank 3 changes, thereby stabilizing the liquid level in the condenser tank 3.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A stepless temperature-controlled low-temperature wastewater evaporation and crystallization system, comprising a heat pump (1), an evaporator (2), a condenser (3), a filter (4), a liquid level regulator (5), and a cooling fan (6), wherein the heat pump (1) is connected to the evaporator (2) and the condenser (3) respectively through a refrigerant pipeline, the evaporator (2) is connected to the condenser (3) through a pipeline, the condenser (3) is connected to the filter (4) through a pipeline, the liquid level regulator (5) is used to regulate the liquid level in the condenser (3), and the cooling fan (6) is used to blow air to cool the refrigerant before it enters the condenser (3).

2. The stepless temperature-controlled low-temperature wastewater evaporation and crystallization system according to claim 1, characterized in that: The liquid level regulator (5) includes a circulation pump (51), a liquid level sensor (52), and a controller (53). The circulation pump (51) is used to control the circulation flow of the condenser (3). The liquid level sensor (52) is used to detect the liquid level in the condenser (3). The liquid level sensor (52) is electrically connected to the circulation pump (51) through the controller (53).

3. The stepless temperature-controlled low-temperature wastewater evaporation and crystallization system according to claim 1, characterized in that: The outer peripheral wall of the condenser (3) is fixedly provided with a return pipe (31) near the top and tangentially distributed. The return pipe (31) is connected to the outlet pipe of the ejector (8) and the circulation pump (51).

4. The stepless temperature-controlled low-temperature wastewater evaporation and crystallization system according to claim 1, characterized in that: The condenser (3) is equipped with a condensation spiral pipe (311).

5. The stepless temperature-controlled low-temperature wastewater evaporation and crystallization system according to claim 4, characterized in that: A positioning tube (32) is fixedly installed in the middle of the condenser (3). The outer peripheral wall of the positioning tube (32) is fixedly connected to the condensation spiral pipe (311) through a connecting tube (33). The connecting tube (33) is connected to the positioning tube (32) and the condensation spiral pipe (311).

6. The stepless temperature-controlled low-temperature wastewater evaporation and crystallization system according to claim 5, characterized in that: The cross-section of the condensing spiral pipe (311) is rectangular.

7. The stepless temperature-controlled low-temperature wastewater evaporation and crystallization system according to claim 1, characterized in that: The evaporator (2) is equipped with a spiral heating pipe (21) for passing refrigerant.

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