Anaerobic steam heating device

Abstract

The utility model discloses an anaerobic steam heating device which comprises a heating tank (1), a cover plate (2) which can be opened is arranged on one side of the heating tank (1), a water inlet pipe (3) and a water outlet pipe (4) are arranged on the heating tank (1), a spiral steam pipeline (5) is arranged in the heating tank (1), and an exhaust pipe (6) and an air inlet pipe (7) are arranged on the outer side of the heating tank (1). One end of the steam pipeline (5) penetrates through the cover plate (2) and then is connected with a flange of the air inlet pipe (7), the other end of the steam pipeline (5) is connected with a flange of the exhaust pipe (6), and the joint of the steam pipeline (5) and the exhaust pipe (6) is arranged on the side wall of the heating tank (1); a first valve (8) is arranged on the water inlet pipe (3), and a second valve (9) is arranged on the water drainage pipe (4). The utility model has the advantage of convenient maintenance.

Description

Technical Field

[0001] The utility model belongs to the field of sewage anaerobic treatment equipment, and particularly relates to an anaerobic steam heating device. Background Art

[0002] In anaerobic biological treatment, a large number of microorganisms in the wastewater act together on the organic matter in the wastewater to form gases such as CH4, CO2, and ammonia. The whole process is accompanied by the metabolism of different microorganisms, which affect and restrict each other during metabolism, forming a complex ecological system.

[0003] Temperature is an important factor affecting the anaerobic treatment process: (1) Temperature affects the growth rate of microorganisms and the metabolism rate of organic matter by affecting the activity of certain enzymes in anaerobic microbial cells. (2) Temperature affects the solubility of organic matter in water. If the solubility is low, the organic matter cannot be directly utilized by microorganisms. (3) Temperature affects the composition and properties of sludge. If the anaerobic reaction wastewater is not heated, the impact on anaerobic treatment is relatively small in the short term, but if it is not heated for a long time, it will have a serious impact on anaerobic treatment, and even may produce a serious inhibitory effect. Especially in winter, when the temperature is as low as more than ten degrees Celsius, not heating will inhibit the anaerobic reaction rate, cause acid accumulation in the anaerobic reactor, and when acidification occurs severely, it will lead to the collapse of the entire system. Anaerobic treatment is relatively sensitive to temperature changes. If the temperature change range exceeds 5°C, it will seriously affect the anaerobic treatment efficiency. Therefore, in summer when the temperature is relatively high, steam heating can be not used, but it is necessary to ensure that the temperature change range does not exceed 5°C. However, when the temperature is relatively low in winter, the wastewater must be heated. Therefore, it is necessary to heat the anaerobic treatment during low-temperature periods to stabilize the treatment effect of the anaerobic system. Therefore, an anaerobic heating device that is convenient for stable heating and maintenance is very necessary.

[0004] The existing anaerobic heating device is a Figure 2 pipe-type steam heater as shown in the figure, which includes a steam chamber. Both sides of the steam chamber are provided with openable covers. A plurality of heating pipes are inserted between the two covers. A circulating pipe for connecting the heating pipes is provided outside the cover. A safety valve, a steam pipe, and a drain pipe are provided on the steam chamber. A normally open stop valve and a steam trap are provided on the drain pipe. The working principle is that the wastewater in the pool passes through the heating pipes through the circulating pipe, is heated by the steam, and then returns to the pool. The condensed water of the steam is discharged from the drain pipe through the steam trap. When the pressure in the steam chamber is too high, the safety valve works to relieve the pressure.

[0005] The existing anaerobic heating device meets the heating requirements of the wastewater, but there are also some defects. The reason is that there are a large number of scaling ions in the wastewater. In order to increase the heat exchange efficiency, the heating pipes are relatively thin. When the heating pipes are prone to scaling and clogging, when they are clogged, it is necessary to remove the covers and dredge each heating pipe. This workload is relatively large, resulting in troublesome maintenance. Content of the Utility Model

[0006] The object of the present utility model is to provide an anaerobic steam heating device. The present utility model has the advantage of being convenient for maintenance.

[0007] The technical solution of the present utility model: The anaerobic steam heating device includes a heating tank. One side of the heating tank is provided with a cover plate that can be opened. The heating tank is provided with a water inlet pipe and a drain pipe. A spiral steam pipe is arranged in the heating tank. An exhaust pipe and an inlet pipe are arranged outside the heating tank. One end of the steam pipe passes through the cover plate and is flange-connected to the inlet pipe. The other end of the steam pipe is flange-connected to the exhaust pipe. The connection between the steam pipe and the exhaust pipe is on the side wall of the heating tank.

[0008] In the anaerobic steam heating device described above, a first valve is arranged on the water inlet pipe, and a second valve is arranged on the drain pipe.

[0009] In the anaerobic steam heating device described above, a third valve is arranged on the inlet pipe, and a temperature controller connected to the third valve is arranged on the drain pipe.

[0010] In the anaerobic steam heating device described above, the end of the exhaust pipe is connected to the inlet pipe, and the connection between the exhaust pipe and the inlet pipe is located between the third valve and the cover plate.

[0011] In the anaerobic steam heating device described above, a check valve is arranged at the connection between the exhaust pipe and the inlet pipe.

[0012] In the anaerobic steam heating device described above, an exhaust port is arranged on the exhaust pipe, and a fourth valve is arranged at the exhaust port.

[0013] In the anaerobic steam heating device described above, there are two exhaust ports. Two steam traps are arranged on the exhaust pipe, and the two steam traps are respectively located in front of the two exhaust ports.

[0014] In the anaerobic steam heating device described above, two fifth valves are arranged on the exhaust pipe, and the two fifth valves are respectively located behind the two exhaust ports.

[0015] In the anaerobic steam heating device described above, a safety valve and a pressure valve are arranged on the inlet pipe.

[0016] Compared with the prior art, the steam in the present utility model passes through the steam pipe, and the wastewater flows outside the steam pipe, causing the wastewater to form scale outside the steam pipe. The inside of the steam pipe always remains clean. By setting the steam pipe in a spiral shape, it is ensured that there is sufficient heat exchange area between the steam and the wastewater. On the basis of ensuring the heat exchange efficiency, only one steam pipe is needed. When scale forms outside the steam pipe, only the steam pipe needs to be removed, and then methods such as soaking with acid solution and flushing with a high-pressure water gun can be used to quickly remove the scale, reducing the workload of workers and making the maintenance more convenient. Therefore, the present utility model has the advantage of being convenient for maintenance.

[0017] In addition, through the setting of various pipelines and valves, it is convenient to accurately control the heating temperature of the wastewater, avoid the reduction or death of the bacterial activity in the wastewater, and improve the heating effect. Brief Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the present utility model.

[0019] Figure 2 is a schematic structural diagram of the existing anaerobic heating device.

[0020] The reference numerals in the drawings are: 1 - heating tank, 2 - cover plate, 3 - water inlet pipe, 4 - drain pipe, 5 - steam pipeline, 6 - exhaust pipe, 7 - air inlet pipe, 8 - first valve, 9 - second valve, 10 - third valve, 11 - temperature controller, 12 - check valve, 13 - exhaust port, 14 - fourth valve, 15 - steam trap, 16 - fifth valve, 17 - safety valve, 18 - pressure valve. Detailed Description of the Preferred Embodiments

[0021] The present utility model will be further described below in conjunction with the drawings and embodiments, but it shall not be used as a basis for limiting the present utility model.

[0022] Embodiment. An anaerobic steam heating device, as Figure 1 shown, includes a heating tank 1. A cover plate 2 that can be opened is provided on one side of the heating tank 1. The cover plate 2 is connected to the heating tank 1 by screws. A water inlet pipe 3 and a drain pipe 4 are provided on the heating tank 1. A first valve 8 is provided on the water inlet pipe 3, and a second valve 9 is provided on the drain pipe 4.

[0023] A spiral steam pipeline 5 is provided in the heating tank 1. An exhaust pipe 6 and an air inlet pipe 7 are provided outside the heating tank 1. One end of the steam pipeline 5 passes through the cover plate 2 and is flange - connected to the air inlet pipe 7, and the other end of the steam pipeline 5 is flange - connected to the exhaust pipe 6. The connection between the steam pipeline 5 and the exhaust pipe 6 is on the side wall of the heating tank 1.

[0024] A third valve 10 (electric control valve) is provided on the air inlet pipe 7, and a temperature controller 11 (existing equipment) connected to the third valve 10 is provided on the drain pipe 4.

[0025] The end of the exhaust pipe 6 is connected to the air inlet pipe 7, and the connection between the exhaust pipe 6 and the air inlet pipe 7 is located between the third valve 10 and the cover plate 2.

[0026] A check valve 12 is provided at the connection between the exhaust pipe 6 and the air inlet pipe 7.

[0027] Two exhaust ports 13 are provided on the exhaust pipe 6, and a fourth valve 14 is provided at the exhaust ports 13.

[0028] There are two steam traps 15 provided on the exhaust pipe 6, and the two steam traps 15 are respectively located on the front sides of the two exhaust ports 13.

[0029] There are two fifth valves 16 provided on the exhaust pipe 6, and the two fifth valves 16 are respectively located on the rear sides of the two exhaust ports 13.

[0030] There are a safety valve 17 and a pressure valve 18 provided on the intake pipe 7. When the internal pressure of the intake pipe 7 is too high, the safety valve 17 operates to relieve pressure, improving safety.

[0031] Working principle: Use a water pump to extract the low-temperature wastewater in the biochemical tank, enter it into the heating tank 1 through the intake pipe 3. After the wastewater is heated, it is discharged back into the biochemical tank through the drain pipe 4. By adjusting the opening degrees of the first valve 8 and the second valve 9, the passing speed of the wastewater in the heating tank 1 is changed, that is, the residence time of the wastewater in the heating tank 1 is changed, and the heating time of the wastewater is changed, so that the heating temperature of the wastewater reaches the standard, and it can be ensured that the heating tank 1 is always full of wastewater, improving the heat exchange efficiency between the wastewater and the steam pipe 5. The first valve 8 and the second valve 9 are mainly used for the rough adjustment of the outlet water temperature of the wastewater in the heating tank 1.

[0032] Steam enters the steam pipe 5 from the intake pipe 7 and exchanges heat with the wastewater in the heating tank 1, and the condensed water and part of the water vapor are discharged from the exhaust pipe 6.

[0033] The temperature controller 11 detects the outlet water temperature of the heating tank 1 and correspondingly adjusts the opening degree of the third valve 10, thereby changing the supplementary speed of the steam, so that the outlet water temperature is maintained within the required temperature range and the outlet water temperature is stable. The temperature controller 11 and the third valve 10 are used for the fine adjustment of the outlet water temperature of the wastewater in the heating tank 1.

[0034] When the ambient air temperature is not too low and the steam consumption is small, only one exhaust port 13 is needed. Looking from Figure 1 above, close the two fifth valves 16 and open the left fourth valve 14, and the condensed water and water vapor are discharged from the left exhaust port 13. When the ambient air temperature is very low and the steam consumption is large, open the left fifth valve 16, close the right fifth valve 16, and open the two fourth valves 14, and the condensed water and water vapor are discharged from the two exhaust ports 13 at the same time. When the steam temperature is very high, the right fifth valve 16 can be appropriately opened to a certain opening degree and the two fourth valves 14 are kept at a certain opening degree, so that part of the condensed water enters the intake pipe 7 through the check valve 12 to reduce the steam temperature and prevent the steam from being too high and causing the death of the bacteria.

[0035] Since the wastewater passes outside the steam pipe 5, scale will form on the outside of the steam pipe 5. Disassemble the cover plate 2, disconnect the connection between the exhaust pipe 6 and the steam pipe 5, and remove the steam pipe 5 together with the cover plate 2. The scale removal can be carried out by soaking in acid solution or flushing with a high-pressure water gun.

[0036] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing 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. Therefore, it should not be construed as a limitation to the present utility model.

Claims

1. Anaerobic steam heating device, characterized in that: It includes a heating tank (1). One side of the heating tank (1) is provided with a cover plate (2) that can be opened. The heating tank (1) is provided with a water inlet pipe (3) and a drain pipe (4). A spiral steam pipe (5) is arranged in the heating tank (1). An exhaust pipe (6) and an air inlet pipe (7) are arranged outside the heating tank (1). One end of the steam pipe (5) passes through the cover plate (2) and is flange-connected to the air inlet pipe (7), and the other end of the steam pipe (5) is flange-connected to the exhaust pipe (6). The connection between the steam pipe (5) and the exhaust pipe (6) is on the side wall of the heating tank (1).

2. The anaerobic steam heating device according to claim 1, characterized in that: A first valve (8) is provided on the water inlet pipe (3), and a second valve (9) is provided on the drain pipe (4).

3. The anaerobic steam heating device according to claim 1, wherein: A third valve (10) is provided on the air inlet pipe (7), and a temperature controller (11) connected to the third valve (10) is provided on the drain pipe (4).

4. The anaerobic steam heating device according to claim 3, wherein: The end of the exhaust pipe (6) is connected to the air inlet pipe (7), and the connection between the exhaust pipe (6) and the air inlet pipe (7) is located between the third valve (10) and the cover plate (2).

5. The anaerobic steam heating device according to claim 4, characterized in that: A check valve (12) is provided at the connection between the exhaust pipe (6) and the air inlet pipe (7).

6. The anaerobic steam heating device according to claim 4, characterized in that: An exhaust port (13) is provided on the exhaust pipe (6), and a fourth valve (14) is provided at the exhaust port (13).

7. The anaerobic steam heating device according to claim 6, wherein: There are two exhaust ports (13). Two steam traps (15) are provided on the exhaust pipe (6), and the two steam traps (15) are respectively located in front of the two exhaust ports (13).

8. The anaerobic steam heating device according to claim 7, characterized in that: Two fifth valves (16) are provided on the exhaust pipe (6), and the two fifth valves (16) are respectively located behind the two exhaust ports (13).

9. The anaerobic steam heating device according to claim 1, wherein: A safety valve (17) and a pressure valve (18) are provided on the air inlet pipe (7).

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