Coalification high-temperature sewage pretreatment system

Abstract

The coalification high-temperature sewage pretreatment system comprises a heat exchanger, a collecting water tank, a homogeneous adjusting tank, a rotational flow grit chamber, a first pipeline and a third pipeline, the heat exchanger comprises a first input end and a second input end, sewage is introduced into the first input end, and domestic water is introduced into the second input end; the heat exchanger comprises a first output end and a second output end, the first output end is communicated with the input end of the collecting water tank, and the second output end is communicated with a domestic water system; the output end of the collecting water tank is communicated with the input end of the homogenizing regulating tank, and the output end of the homogenizing regulating tank is communicated with the sewage treatment system; sewage enters the rotational flow grit chamber through a first pipeline, and the output end of the rotational flow grit chamber is communicated with the input end of the collecting water tank; the output end of the third pipeline is communicated with the input end of the homogeneous regulating tank, and sewage is introduced into the input end of the third pipeline. The problems that in the prior art, sewage is not subjected to quality-divided and flow-divided treatment, and heat of high-temperature sewage is not recycled are solved.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and in particular to a coalification high-temperature sewage pretreatment system. Background Art

[0002] The coal chemical industry is a high-energy-consuming and high-pollution industry, which not only consumes a lot of water but also discharges a lot of pollutants.

[0003] First, the wastewater discharged during the current process reaches 80-110℃. The waste heat resources carried by this part of the wastewater with higher temperature are not effectively utilized as resources. Some of the non-condensable gases produced are discharged into the air, which will pollute the surrounding environment and cause certain energy waste. Secondly, if the wastewater is not treated according to its quality, the treatment process of some wastewater will be complicated and the overall treatment efficiency of the wastewater will be reduced. Utility Model Content

[0004] The embodiment of the present application provides a coal chemical high-temperature wastewater pretreatment system, which solves the problem that the prior art does not perform quality-based and diversion treatment on wastewater, resulting in complicated treatment processes for some wastewater, and does not recover the heat of wastewater with higher temperatures, resulting in energy waste. The present application realizes the effective utilization of wastewater heat and also improves the pretreatment efficiency of wastewater.

[0005] In the first aspect, an embodiment of the utility model provides a coal chemical high-temperature wastewater pretreatment system, including a heat exchanger, a collecting water tank, a homogenizing regulating tank, a cyclone grit tank, a first pipeline and a third pipeline; the heat exchanger includes a first input end and a second input end, the first input end is connected to sewage, and the second input end is connected to domestic water, and the heat exchanger can transfer the heat of the sewage to the domestic water; the heat exchanger also includes a first output end and a second output end, the first output end is connected to the input end of the collecting water tank, and the second output end is connected to the domestic water system; the output end of the collecting water tank is connected to the input end of the homogenizing regulating tank, and the output end of the homogenizing regulating tank is connected to the recycled water treatment system and the sewage biochemical treatment system; the sewage enters the cyclone grit tank through the first pipeline, and the output end of the cyclone grit tank is connected to the input end of the collecting water tank; the output end of the third pipeline is connected to the input end of the homogenizing regulating tank, and the input end of the third pipeline is connected to the sewage.

[0006] In a possible implementation, a cooling tower is further included; a cooling tower is arranged between the collecting water tank and the homogenizing regulating tank; the output end of the collecting water tank is connected to the input end of the cooling tower, and the output end of the cooling tower is connected to the input end of the homogenizing regulating tank.

[0007] In a possible implementation, it also includes a second pipeline; the input end of the second pipeline is connected to the first output end; the output end of the second pipeline is connected to the input end of the homogenization regulating tank; the output end of the cyclone sand settling tank is connected to the second pipeline.

[0008] In a possible implementation, it also includes a lifting pump and an external supply pump; a lifting pump is arranged between the collecting water tank and the cooling tower, the output end of the collecting water tank is connected with the input end of the lifting pump, and the input end of the cooling tower is connected with the output end of the lifting pump; the input end of the external supply pump is connected with the output end of the homogenization regulating tank, and the output end of the external supply pump is connected with the recycled water treatment system and the sewage biochemical treatment system.

[0009] In a possible implementation, the homogenization regulating tank includes a homogenization regulating tank agitator; the homogenization regulating tank agitator is disposed in the homogenization regulating tank and can uniformly stir the sewage.

[0010] In a possible implementation, the cyclone grit chamber includes a cyclone grit chamber agitator; the cyclone grit chamber agitator is disposed in the cyclone grit chamber.

[0011] One or more technical solutions provided in the embodiments of the present utility model have at least the following technical effects or advantages:

[0012] The embodiment of the utility model adopts a heat exchanger, a collecting water tank, a cooling tower, a homogenizing regulating tank, a first pipeline and a third pipeline, wherein the heat exchanger includes a first input end, a first output end, a second input end and a second output end. For sewage with a higher temperature, the first input end and the second input end are respectively connected to the sewage and domestic water, and the first output end and the second output end are respectively connected to the collecting water tank and the domestic water system. The heat exchanger can transfer the heat of the sewage to the domestic water, and transmit the heated domestic water to the domestic water system. At the same time, the cooled sewage is transmitted to the collecting water tank for subsequent treatment. This method effectively utilizes the thermal energy of the sewage and effectively cools the sewage; for sewage with a higher concentration of suspended matter, it enters the cyclone grit chamber through the first pipeline, and the output end of the cyclone grit chamber is connected to the collecting water tank. Through the first pipeline, the sewage with a higher concentration of suspended matter can be firstly introduced into the cyclone grit chamber for suspended matter sedimentation treatment; for sewage with a lower temperature and suspended matter concentration, it is directly introduced into the homogenizing regulating tank through the third pipeline; the output end of the homogenizing regulating tank is connected to the recycled water system and the sewage biochemical system, and the pre-treated sewage can be further treated. The present application solves the problem that in the prior art, sewage is not treated by quality separation and diversion, resulting in complicated treatment processes for some sewage, and the heat of sewage with higher temperatures is not recovered, resulting in energy waste. The present application realizes the effective utilization of sewage heat and also improves the efficiency of sewage pretreatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A schematic diagram of a coal chemical high-temperature wastewater pretreatment system provided in an embodiment of the present application;

[0015] Icons: 1-heat exchanger; 2-collecting water tank; 3-swirl grit chamber agitator; 4-swirl grit chamber; 5-lifting pump; 6-cooling tower; 7-homogeneous regulating tank; 8-homogeneous regulating tank agitator; 9-external supply pump; 10-first pipeline; 11-second pipeline; 12-third pipeline. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] In the description of the embodiments 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", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of 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 cannot be understood as a limitation on the present utility model. The terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0018] like Figure 1 As shown, the embodiment of the present application provides a coal chemical high-temperature wastewater pretreatment system, including a heat exchanger 1, a collecting water tank 2, a homogenizing regulating tank 7, a cyclone grit tank 4, a first pipe 10 and a third pipe 12; the heat exchanger 1 includes a first input end and a second input end, the first input end is connected to sewage, and the second input end is connected to domestic water, and the heat exchanger 1 can transfer the heat of the sewage to the domestic water; the heat exchanger 1 also includes a first output end and a second output end, the first output end is connected to the input end of the collecting water tank 2, and the second output end is connected to the domestic water system; the output end of the collecting water tank 2 is connected to the input end of the homogenizing regulating tank 7, and the output end of the homogenizing regulating tank 7 is connected to the recycled water treatment system and the sewage biochemical treatment system; the sewage enters the cyclone grit tank 4 through the first pipe 10, and the output end of the cyclone grit tank 4 is connected to the input end of the collecting water tank 2; the output end of the third pipe 12 is connected to the input end of the homogenizing regulating tank 7, and the input end of the third pipe 12 is connected to sewage.

[0019] Exemplarily, the heat exchanger 1 has a domestic water channel and a sewage channel which are not connected. The sewage is temperature-detected before entering the sewage pretreatment system. For sewage with a temperature of 80°C to 110°C, it is introduced into the first input end, and the domestic water is introduced into the second input end. The heat of the sewage can be transferred to the domestic water through the heat exchanger 1 to complete the heating of the domestic water. The heated domestic water is introduced into the domestic water system through the second output end for human use.

[0020] Exemplarily, the first output end of the heat exchanger 1 is connected to the input end of the collecting water tank 2, and the sewage whose temperature is reduced after heat exchange in the heat exchanger 1 is passed into the collecting water tank 2 through the first output end;

[0021] Exemplarily, the output end of the collecting water tank 2 is connected to the input end of the homogenizing regulating tank 7, and the sewage in the collecting water tank 2 can be passed into the homogenizing regulating tank 7 through a pipeline for treatment;

[0022] Exemplarily, the output end of the homogenization regulating tank 7 is connected to the reused water treatment system and the sewage biochemical treatment system, and the sewage can be introduced into the reused water treatment system and the sewage biochemical treatment system for subsequent treatment after being treated by the homogenization regulating tank 7.

[0023] For example, the suspended matter concentration test is also performed before the sewage is treated. For sewage with a suspended matter concentration greater than 100 mg / L, the sewage is first passed through the first pipe 10 into the cyclone grit chamber 4 for treatment. The desander of the cyclone grit chamber 4 is driven by the driving device to drive the stirring impeller in the chamber to rotate, thereby generating centrifugal force, so that the suspended matter in the sewage is collected in the sand collecting hopper at the bottom of the chamber along the wall and the slope of the bottom of the chamber;

[0024] Exemplarily, the output end of the cyclone grit chamber 4 is connected to the input end of the collecting water tank, the sewage treated by the cyclone grit chamber 4 is passed into the collecting water tank 2, and the sewage in the collecting water tank 2 is then passed into the homogenizing regulating tank 7 for treatment.

[0025] For example, for sewage with a temperature lower than 50° C. and a suspended solids concentration lower than 100 mg / L, the sewage is directly introduced into the homogenization regulating tank 7 through the third pipe 12 for treatment.

[0026] like Figure 1 As shown, in the embodiment of the present application, a cooling tower 6 is also included; a cooling tower 6 is arranged between the collecting water tank 2 and the homogenizing regulating tank 7; the output end of the collecting water tank 2 is connected to the input end of the cooling tower 6, and the output end of the cooling tower 6 is connected to the input end of the homogenizing regulating tank 7.

[0027] Exemplarily, the cooling tower 6 is a device for lowering water temperature. The cooling tower 6 is set between the collecting water tank 2 and the homogenizing regulating tank 7, which can cool the sewage. The sewage in the collecting water tank 2 first enters the cooling tower 6 for cooling, and then the cooled sewage is discharged into the homogenizing regulating tank 7 for treatment.

[0028] like Figure 1 As shown, in the embodiment of the present application, it also includes a second pipeline 11; the input end of the second pipeline 11 is connected to the first output end; the output end of the second pipeline 11 is connected to the input end of the homogenization regulating tank 7; the output end of the cyclone sand settling tank 4 is connected to the second pipeline 11.

[0029] For example, after the sewage is cooled by the heat exchanger 1, the temperature is detected. For the sewage whose temperature has reached the standard for discharge into the homogenizing regulating tank 7, the sewage is directly introduced into the homogenizing regulating tank 7 through the second pipe 11 for treatment.

[0030] For example, for sewage with a suspended matter concentration greater than 100 mg / L, temperature detection will also be carried out after treatment in the cyclone grit chamber 4. For sewage whose temperature has reached the discharge standard of the homogenizing regulating tank 7, the sewage can be directly introduced into the homogenizing regulating tank 7 for treatment through the second pipe 11.

[0031] like Figure 1 As shown, in the embodiment of the present application, a lifting pump 5 and an external supply pump 9 are also included; the lifting pump 5 is arranged between the collecting water tank 2 and the cooling tower 6, the output end of the collecting water tank 2 is connected to the input end of the lifting pump 5, and the input end of the cooling tower 6 is connected to the output end of the lifting pump 5; the input end of the external supply pump 9 is connected to the output end of the homogenizing regulating tank 7, and the output end of the external supply pump 9 is connected to the recycled water treatment system and the sewage biochemical treatment system.

[0032] Exemplarily, the lifting pump 5 can prevent sewage from flowing back in the pump and can provide power for collecting sewage in the water tank 2 and passing it into the cooling tower 6 .

[0033] Exemplarily, the external supply pump 9 can provide power for the sewage in the homogenization regulating tank 7 to enter the recycled water treatment system and the sewage biochemical treatment system.

[0034] like Figure 1 As shown, in the embodiment of the present application, the homogenizing regulating tank 7 includes a homogenizing regulating tank 7 agitator; the homogenizing regulating tank 7 agitator is arranged in the homogenizing regulating tank 7 and can evenly stir the sewage.

[0035] Exemplarily, in order to make the water quality of the sewage in the homogenizing regulating tank 7 uniform and avoid the precipitation of suspended matter in the sewage, a homogenizing regulating tank 7 agitator is provided in the homogenizing regulating tank 7 to stir the sewage.

[0036] like Figure 1As shown, in the embodiment of the present application, the cyclone grit chamber 4 includes a cyclone grit chamber 4 agitator 3 ; the cyclone grit chamber 4 agitator 3 is disposed in the cyclone grit chamber 4 .

[0037] For example, in order to manipulate the vortex and make the suspended matter in the sewage sink, a cyclone grit chamber 4 is provided with a cyclone grit chamber 4 agitator 3, and its stirring speed is relatively slow.

[0038] The working process of a coalification high-temperature wastewater pretreatment system provided in the embodiment of the present application is as follows:

[0039] First, the temperature and suspended solids concentration of the sewage introduced into the pretreatment system are detected. For sewage with a high temperature and a low suspended solids concentration, it is first introduced into the heat exchanger 1 for heat recovery, and then the temperature is detected after the temperature is lowered. If the temperature reaches the discharge standard of the homogenizing regulating tank 7, the sewage is directly discharged into the homogenizing regulating tank 7 through the second pipe 11 for treatment; if the temperature does not reach the discharge standard of the homogenizing regulating tank 7, the sewage is introduced into the collection tank 2, and then into the subsequent cooling tower 6 for cooling, and finally into the homogenizing regulating tank 7.

[0040] For sewage with a high concentration of suspended matter, it is first passed into the cyclone grit chamber 4 for suspended matter sedimentation, and the temperature is detected at the outlet of the cyclone grit chamber 4. If the temperature reaches the discharge standard of the homogeneous regulating tank 7, the sewage is directly discharged into the homogeneous regulating tank 7 through the second pipe 11; if the temperature does not reach the discharge standard of the homogeneous regulating tank 7, the sewage is passed into the collection water tank 2, and then into the subsequent cooling tower 6 for cooling, and finally into the homogeneous regulating tank 7.

[0041] For sewage with a relatively low temperature (reaching the discharge standard of the homogenizing regulating tank 7 ) and a relatively low suspended matter concentration, the sewage is directly introduced into the homogenizing regulating tank 7 through the third pipe 12 for treatment.

[0042] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0043] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A coal chemical high temperature wastewater pretreatment system, characterized in that: It comprises a heat exchanger (1), a water collection tank (2), a homogenization regulating tank (7), a cyclone sand settling tank (4), a first pipeline (10) and a third pipeline (12); The heat exchanger (1) comprises a first input end and a second input end, sewage is introduced into the first input end, and domestic water is introduced into the second input end, and the heat exchanger (1) is capable of transferring heat from the sewage to the domestic water; The heat exchanger (1) further comprises a first output end and a second output end, the first output end being connected to the input end of the collection water tank (2), and the second output end being connected to a domestic water system; The output end of the water collection tank (2) is connected to the input end of the homogenization regulating tank (7), and the output end of the homogenization regulating tank (7) is connected to the recycled water treatment system and the sewage biochemical treatment system; The sewage enters the cyclone grit chamber (4) through the first pipe (10), and the output end of the cyclone grit chamber (4) is connected to the input end of the collection water tank (2); The output end of the third pipeline (12) is connected to the input end of the homogenization regulating tank (7), and the sewage is introduced into the input end of the third pipeline (12).

2. A coalification high-temperature wastewater pretreatment system according to claim 1, characterized in that: Also includes a cooling tower (6); The cooling tower (6) is arranged between the collecting water tank (2) and the homogenizing regulating tank (7); The output end of the collecting water tank (2) is connected to the input end of the cooling tower (6), and the output end of the cooling tower (6) is connected to the input end of the homogenizing regulating tank (7).

3. A coalification high-temperature wastewater pretreatment system according to claim 1, characterized in that: Also includes a second pipeline (11); The input end of the second pipeline (11) is connected to the first output end; the output end of the second pipeline (11) is connected to the input end of the homogenization regulating tank (7); The output end of the cyclone grit chamber (4) is connected to the second pipeline (11).

4. A coalification high-temperature wastewater pretreatment system according to claim 2, characterized in that: It also includes a lift pump (5) and an external supply pump (9); The lifting pump (5) is arranged between the collecting water tank (2) and the cooling tower (6); the output end of the collecting water tank (2) is connected to the input end of the lifting pump (5); and the input end of the cooling tower (6) is connected to the output end of the lifting pump (5); The input end of the external supply pump (9) is connected to the output end of the homogenization regulating tank (7), and the output end of the external supply pump (9) is connected to the recycled water treatment system and the sewage biochemical treatment system.

5. The coalification high-temperature wastewater pretreatment system according to claim 1 is characterized in that: The homogenizing regulating tank (7) comprises a homogenizing regulating tank agitator (8); The homogenizing regulating tank agitator (8) is arranged in the homogenizing regulating tank (7) and is capable of uniformly agitating the sewage.

6. A coalification high-temperature wastewater pretreatment system according to claim 1, characterized in that: The cyclone grit chamber (4) comprises a cyclone grit chamber agitator (3); The cyclone grit chamber agitator (3) is arranged in the cyclone grit chamber (4).

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