Combined system for replacing gangue with biological fermentation sludge

Abstract

The utility model discloses a combined system for replacing gangue with biological fermentation sludge, which relates to the technical field of sludge treatment and comprises a biological fermentation device, a sewage treatment device, a drying and balling device and a power plant. The sewage treatment device comprises a sewage receiving end and a sludge output end, the sewage receiving end is connected with the sewage discharge end, the sludge output end is used for outputting sludge aged through strain growth, the drying and balling device comprises a drying machine and a ball pressing machine, and a drying machine input end of the drying machine is connected with the sludge output end; the output end of the drying machine is connected with the ball pressing machine, the ball pressing machine is provided with a pellet output port, the power plant is provided with a power coal blending inlet, and the power coal blending inlet is in butt joint with the pellet output port. The balled biological fermentation sludge is used for replacing part of power coal blending of a power plant, so that the environmental pollution is reduced, the sludge treatment cost is reduced, and harmless and recycling coupling treatment of the sludge is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment, in particular to a combined system for replacing gangue with biological fermentation sludge. Background Art

[0002] In winter, cities rely on heating or geothermal heating. Conventional thermal power plants generally require coal with a calorific value of about 5500kcal / Kg. The heating station of the thermal power plant uses power coal with a calorific value of 2000-2400kcal / kg. The commonly used power coal is coal gangue. In many areas, the composition of coal gangue is sandstone, gravel, and shale. When coal gangue is piled in the open air, it will aggravate the haze phenomenon. When coal gangue spontaneously combusts, it will produce toxic and harmful gases and smoke. It is necessary to find a power coal to replace coal gangue to improve the defects of coal gangue as power coal. Utility Model Content

[0003] In order to solve the above problems, the present application provides a combined system of biological fermentation sludge replacing gangue.

[0004] The present application provides a combined system for replacing gangue with biological fermentation sludge, comprising a biological fermentation device, a sewage treatment device, a drying and pelletizing device and a power plant. The biological fermentation device is used to convert carbon monoxide into ethanol. The biological fermentation device is provided with a sewage discharge end for discharging sewage generated during the fermentation process. The sewage treatment device comprises a sewage receiving end and a sludge output end, the sewage receiving end is connected to the sewage discharge end, the sludge output end is used to output the sludge aged by the growth of bacteria. The drying and pelletizing device comprises a dryer and a pelletizing machine. The dryer is provided with a dryer input end and a dryer output end, the dryer input end is connected to the sludge output end, the dryer output end is connected to the pelletizing machine, the pelletizing machine is provided with a pelletizing output port, the power plant is provided with a power coal distribution inlet, and the power coal distribution inlet is connected to the pelletizing output port.

[0005] In some embodiments, the dryer comprises:

[0006] A housing, a dryer input end and a dryer output end are arranged in the housing, and the housing is provided with a first air inlet and a first air outlet, and an air flow channel is formed between the first air inlet and the first air outlet;

[0007] The transport mechanism is arranged in the casing, and its two ends are respectively connected to the dryer input end and the dryer output end. The transport mechanism is used to carry the sludge and move the sludge from the dryer input end to the dryer output end. The air flow channel passes through the transport mechanism.

[0008] In some embodiments, the drying and pelletizing device comprises:

[0009] A cooler, provided with a second air inlet and a second air outlet, the second air inlet being connected to the first air outlet through a first pipeline;

[0010] The steam heater is provided with a third air inlet and a third air outlet. The third air inlet is connected to the second air outlet through a second pipeline, and the third air outlet is connected to the first air inlet through a third pipeline.

[0011] In some embodiments, the cooler is provided with a first water outlet, and the steam heater is provided with a second water outlet;

[0012] The drying and balling device includes:

[0013] The water treatment mechanism is connected to the first water outlet and the second water outlet through a pipeline.

[0014] In some embodiments, the drying and pelletizing device comprises:

[0015] A first temperature measuring element is installed in the first pipeline;

[0016] The second temperature measuring component is installed in the third pipeline.

[0017] In some embodiments, the drying and pelletizing device comprises:

[0018] The controller is signal-connected to the first temperature measuring element and the second temperature measuring element, and is control-connected to the steam heater.

[0019] In some embodiments, the controller is in control connection with both the carrier mechanism and the pellet press.

[0020] In some embodiments, the drying and pelletizing device comprises:

[0021] The receiving bin is separated from the dryer and connected to the sludge output end;

[0022] The distributor is installed at the input end of the dryer and is connected to the receiving bin through a pipeline for conveying sludge.

[0023] In some embodiments, the drying and pelletizing device comprises:

[0024] The storage bin is connected to the pellet press through a pipeline for conveying pellets, and the storage bin is butt-jointed with the pellet output port.

[0025] In some embodiments, the drying and pelletizing device comprises:

[0026] The pressure measuring piece is installed in the dryer to detect the air pressure in the air flow channel.

[0027] The beneficial effects of the present application are as follows: a biological fermentation sludge replacement gangue joint system is provided, including a biological fermentation device, a sewage treatment device, a drying and pelletizing device and a power plant. The biological fermentation device performs synthetic gas biological fermentation, and the sewage generated during the fermentation process is sent to the sewage treatment device. The bacteria existing in the sludge continue to grow and age, and the sludge is rich in dead microorganisms, so that the sludge is rich in carbon elements. The dried sludge is subjected to a combustion test to verify that it can be burned, and its calorific value is determined to be about 2074.52 kcal / kg. The water-containing sludge discharged from the sludge output end of the sewage treatment device is sent to a dryer, and the water-containing sludge is discharged from the sludge output end of the sewage treatment device. After being dried, the mud forms dry sludge, which is then sent to a briquetting machine to be pressed into sludge balls. The sludge balls are then transported to power plants and used as power coal for the power plants, thus reducing the amount of coal used in the power plants. This system uses the balled bio-fermentation sludge to replace part of the power coal for the power plants. The bio-fermentation sludge has a stable calorific value, which can reduce the emission of a large amount of environmental pollutants such as SO2 generated after the combustion of traditional power coal, and can also reduce the cost of sludge disposal, improve the environmental pollution caused by sludge stacking, and achieve the coupling treatment of harmlessness and resource utilization of sludge. The use of bio-fermentation sludge as power coal for heating stations has a very broad prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model.

[0029] Figure 1 A schematic diagram of a combined system for replacing gangue with biological fermentation sludge provided in this application;

[0030] Figure 2 A schematic diagram of the structure of a drying and pelletizing device in a combined system for replacing gangue with biological fermentation sludge provided in this application;

[0031] Figure 3 A schematic diagram of the operation of a drying and pelletizing device in a combined system for replacing gangue with biological fermentation sludge provided in this application.

[0032] Figures are marked: 1-biological fermentation device, 11-wastewater discharge end, 2-wastewater treatment device, 21-wastewater receiving end, 22-sludge output end, 3-drying ball device, 31-dryer, 311-dryer input end, 312-dryer output end, 313-housing, 3131-first air inlet, 3132-first air outlet, 314-carrying mechanism, 32-ball press, 321-ball output port, 33 -cooler, 331-second air inlet, 332-second air outlet, 333-first pipeline, 334-first water outlet, 34-steam heater, 341-third air inlet, 342-third air outlet, 343-second pipeline, 344-third pipeline, 345-second water outlet, 35-water treatment mechanism, 36-receiving bin, 37-distributor, 38-storage bin, 4-power plant, 41-power coal distribution inlet. DETAILED DESCRIPTION

[0033] Please refer to Figure 1 The present application discloses a combined system for replacing gangue with biological fermentation sludge, including a biological fermentation device 1, a sewage treatment device 2, a drying and pelletizing device 3 and a power plant 4.

[0034] The biological fermentation device 1 is used to convert carbon monoxide into ethanol. Specifically, the biological fermentation device 1 applies the synthesis gas biological fermentation technology, utilizes CO in the upstream industrial waste gas, adds N, P, and K elements in the production process to provide normal growth and metabolism of microbial cells, converts carbon monoxide into compounds such as ethanol through its own biological metabolism in the fermentation reactor, and the wastewater generated in the fermentation process is output through the wastewater discharge end 11 of the biological fermentation device 1.

[0035] The sewage treatment device 2 is provided with a sewage receiving end 21, a sludge output end 22 and a treated water output end, and the water after the mud and water separation can be discharged from the treated water output end. The sewage receiving end 21 is connected to the sewage discharge end 11, and the sewage generated during the fermentation process enters the sewage treatment device 2. Aerobic bacteria and anaerobic bacteria exist in the mud mass, and the compounds such as ammonia nitrogen in the water are degraded by microbial fermentation. The bacteria exist in the sludge, and the bacteria in this part of the sludge continue to grow and age. The sludge is rich in dead microorganisms, making the sludge rich in carbon elements. The sludge aged by the growth of the bacteria is output from the sludge output end 22. The dried sludge is subjected to a combustion test to verify that it can be burned, and its calorific value is determined to be about 2074.52 kcal / kg. In some embodiments, the sewage treatment device 2 is a plate and frame filter press.

[0036] The drying and pelletizing device 3 includes a dryer 31 and a pelletizing machine 32. The dryer 31 is provided with a dryer input end 311 and a dryer output end 312. The dryer input end 311 is connected to the sludge output end 22. The water-containing sludge discharged from the sludge output end 22 of the sewage treatment device 2 is sent to the dryer 31. The water-containing sludge is dried to form dry sludge. The dryer output end 312 is connected to the pelletizing machine 32. The dry sludge is sent to the pelletizing machine 32 and pressed into sludge balls. The pelletizing machine 32 is provided with a pelletizing output port 321. The sludge balls are transported to the power plant 4. The power plant 4 is provided with a power coal blending inlet 41. The power coal blending inlet 41 is connected to the pelletizing output port 321. The sludge balls are used as the power coal blending of the power plant 4, which can reduce the coal usage of the power plant 4.

[0037] This system uses pelletized bio-fermentation sludge to replace four parts of the power plant's power coal. The bio-fermentation sludge has a stable calorific value, which can reduce the emission of a large amount of environmental pollutants such as SO2 produced after the combustion of traditional power coal, and can reduce the cost of sludge disposal, improve the environmental pollution caused by sludge stacking, and achieve the coupling treatment of sludge harmlessness and resource utilization. The use of bio-fermentation sludge as power coal for heating stations has a very broad prospect.

[0038] In some embodiments, see Figure 2 The dryer 31 includes a casing 313 and a carrying mechanism 314. The dryer input end 311 and the dryer output end 312 are arranged in the casing 313. The casing 313 is provided with a first air inlet 3131 and a first air outlet 3132, and an air flow channel is formed between the first air inlet 3131 and the first air outlet 3132. Hot air flows in the air flow channel. The hot air is generally formed by air heating. The carrier mechanism 314 is arranged in the housing 313, and the two ends of the carrier mechanism 314 are respectively connected to the dryer input end 311 and the dryer output end 312. The water-containing sludge enters the carrier mechanism 314 through the dryer input end 311. The carrier mechanism 314 is used to carry the sludge. The carrier mechanism 314 moves the sludge from the dryer input end 311 to the dryer output end 312, and the air flow channel passes through the carrier mechanism 314, so that the air flow channel is in contact with the water-containing sludge on the carrier mechanism 314 under the condition of hot air circulation, and the hot air carries away the moisture in the water-containing sludge, thereby removing the moisture in the water-containing sludge. Among them, the air flow channel passes through the carrier mechanism 314, which means that the hot air flowing in the air flow channel passes through the surface of the sludge.

[0039] In some embodiments, see Figure 2 The drying and balling device 3 includes a cooler 33 and a steam heater 34. Both the cooler 33 and the steam heater 34 are heat exchangers. The heat exchanger includes a hot medium channel and a cold medium channel for exchanging heat with each other. The target gas is cooled by the cooler 33 and the target gas is heated by the steam heater 34.

[0040] For more details, please refer to Figure 2 The cooler 33 is provided with a second air inlet 331 and a second air outlet 332, and the second air inlet 331 is connected to the first air outlet 3132 through a first pipe 333. The steam heater 34 is provided with a third air inlet 341 and a third air outlet 342, and the third air inlet 341 is connected to the second air outlet 332 through a second pipe 343, and the third air outlet 342 is connected to the first air inlet 3131 through a third pipe 344. Figure 3 The gas flow and sludge flow are shown. Please combine Figure 2 and Figure 3 It is understood that the steam heater 34 is provided with an air passage between the third air inlet 341 and the third air outlet 342, and the steam heater 34 is provided with a steam inlet. The steam entering through the steam inlet heats the gas in the air passage, and the hot air with a sufficiently high temperature is transported to the first air inlet 3131 of the dryer 31 along the third pipe 344, and the hot air flows along the air flow channel to the first air outlet 3132. The hot air flowing along the air flow channel takes away the moisture in the sludge, and the temperature of the hot air is reduced. The moist hot air with reduced temperature is transported to the second air inlet 331 of the cooler 33 along the first pipe 333, and the moist hot air condenses in the cooler 33 to form condensed water. The hot air with reduced moisture is transported to the steam heater 34 along the second pipe 343 through the second air outlet 332, and the hot air is heated in the steam heater 34. The heated hot air returns to the dryer 31 until the sludge in the dryer 31 is in a dry state, and the dry sludge is transported to the ball press 32.

[0041] In some embodiments, see Figure 2 The cooler 33 is provided with a first water outlet 334, the steam heater 34 is provided with a second water outlet 345, and the drying and balling device 3 includes a water treatment mechanism 35, which is connected to the first water outlet 334 and the second water outlet 345 through a pipeline, and purifies the condensed water formed when the hot air condenses in the condenser and the condensed water formed by the steam in the steam heater 34.

[0042] In some embodiments, the drying and pelletizing device 3 includes a first temperature measuring element and a second temperature measuring element. The first temperature measuring element is installed in the first pipeline 333, and the first temperature measuring element measures the temperature of the hot and humid air coming out of the dryer 31 to reflect the drying progress of the sludge in the dryer 31. The second temperature measuring element is installed in the third pipeline 344, and the second temperature measuring element measures the temperature of the hot air heated by the steam heater 34 to ensure the drying effect of the sludge in the dryer 31.

[0043] In some embodiments, the temperature of the hot air entering the dryer 31 is limited to at least 90°C. When the measured value of the second temperature measuring component is less than 90°C, the power of the steam heater 34 is increased. At the same time, when the measured value of the first temperature measuring component is less than 60°C, it indicates that the drying effect of the sludge in the dryer 31 has not reached the preset level. The sludge is continuously dried until the measured value of the first temperature measuring component is not less than 60°C, and then the dried sludge is sent to the ball press 32.

[0044] In some embodiments, the drying and balling device 3 includes a controller, which is signal-connected to the first temperature measuring element and the second temperature measuring element, and is control-connected to the steam heater 34. The controller controls the drying operation in the dryer 31 according to the detection values ​​of the first temperature measuring element and the second temperature measuring element. When the measurement value of the second temperature measuring element is less than a preset value, such as 90°C, the controller increases the power of the steam heater 34. When the measurement value of the first temperature measuring element is less than a preset value, such as 60°C, the steam heater 34 is controlled to run continuously.

[0045] In some embodiments, the controller is controlled and connected to the carrying mechanism 314, and the controller is controlled and connected to the ball press 32. When the measurement value of the first temperature measuring component is not less than a preset value, such as 60°C, the dryer 31 controls the carrying mechanism 314 to output the dried sludge, and the dried sludge is transported to the ball press 32. The controller controls the ball press 32 to work, and the ball press 32 presses the sludge into sludge balls.

[0046] In some embodiments, the third pipe 344 is installed with a flow meter to detect the flow of the hot air entering the dryer 31 .

[0047] In some embodiments, the first pipeline 333 is installed with a regulating valve, and the third pipeline 344 is installed with a regulating valve, and the pipeline flow is regulated by the regulating valve.

[0048] In some embodiments, see Figure 2 The drying and pelletizing device 3 includes a receiving bin 36 and a distributor 37. The receiving bin 36 is spaced apart from the dryer 31, and the receiving bin 36 is connected to the sludge output terminal 22, and the water-containing sludge discharged from the sludge output terminal 22 of the sewage treatment device 2 is sent to the receiving bin 36. The distributor 37 is installed at the dryer input terminal 311, and the distributor 37 is connected to the receiving bin 36 through a pipeline for conveying sludge. A conveying pump is installed on the pipeline between the distributor 37 and the receiving bin 36 to convey the water-containing sludge in the receiving bin 36 to the distributor 37, and the water-containing sludge is arranged on the carrying mechanism 314 of the dryer 31 through the distributor 37.

[0049] In some embodiments, see Figure 2The drying and pelletizing device 3 includes a storage bin 38, which is connected to the pellet output port 321. The storage bin 38 is connected to the pellet press 32 through a pipeline for conveying pellets. The pellets are sent to the storage bin 38 for storage, and when needed, the pellets are transported from the storage bin 38 to the power plant 4 for use.

[0050] In some embodiments, the drying and balling device 3 includes a pressure measuring piece installed in the dryer 31, and the pressure measuring piece is used to detect the air pressure in the air flow channel to ensure that the air pressure in the dryer 31 is within a safe range.

[0051] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0052] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A combined system for replacing gangue with biological fermentation sludge, characterized in that: include: A biological fermentation device for converting carbon monoxide into ethanol, and having a sewage discharge end for discharging sewage generated during the fermentation process; A sewage treatment device, comprising a sewage receiving end and a sludge output end, wherein the sewage receiving end is connected to the sewage discharge end, and the sludge output end is used to output the sludge aged by the growth of bacteria; The drying and pelletizing device comprises a dryer and a pelletizing machine, wherein the dryer is provided with a dryer input end and a dryer output end, the dryer input end is connected to the sludge output end, the dryer output end is connected to the pelletizing machine, and the pelletizing machine is provided with a pelletizing output port; The power plant is provided with a power coal blending inlet, and the power coal blending inlet is connected to the pellet output port.

2. The combined system of biological fermentation sludge replacing waste rock according to claim 1, characterized in that: The dryer comprises: A casing, wherein the dryer input end and the dryer output end are arranged in the casing, and the casing is provided with a first air inlet and a first air outlet, and an air flow channel is formed between the first air inlet and the first air outlet; A transport mechanism is arranged in the casing, and its two ends are respectively connected to the dryer input end and the dryer output end. The transport mechanism is used to carry the sludge and move the sludge from the dryer input end to the dryer output end, and the air flow channel passes through the transport mechanism.

3. The combined system of biological fermentation sludge replacing waste rock according to claim 2, characterized in that: The drying and balling device comprises: A cooler, provided with a second air inlet and a second air outlet, wherein the second air inlet is connected to the first air outlet through a first pipeline; The steam heater is provided with a third air inlet and a third air outlet. The third air inlet is connected to the second air outlet through a second pipe, and the third air outlet is connected to the first air inlet through a third pipe.

4. The combined system of biological fermentation sludge replacing waste rock according to claim 3, characterized in that: The cooler is provided with a first water outlet, and the steam heater is provided with a second water outlet; The drying and balling device comprises: The water treatment mechanism is connected to the first water outlet and the second water outlet through a pipeline.

5. The combined system of biological fermentation sludge replacing waste rock according to claim 3, characterized in that: The drying and balling device comprises: A first temperature measuring element is installed in the first pipeline; The second temperature measuring component is installed in the third pipeline.

6. The combined system of biological fermentation sludge replacing waste rock according to claim 5, characterized in that: The drying and balling device comprises: A controller is signal-connected to the first temperature measuring component and the second temperature measuring component, and is control-connected to the steam heater.

7. The combined system of biological fermentation sludge replacing waste rock according to claim 6, characterized in that: The controller is in control connection with both the transport mechanism and the ball press machine.

8. The combined system of biological fermentation sludge replacing waste rock according to any one of claims 1 to 7, characterized in that: The drying and balling device comprises: A receiving bin, spaced apart from the dryer and connected to the sludge output end; A distributor is installed at the input end of the dryer and is connected to the receiving bin through a pipeline for conveying sludge.

9. The biological fermentation sludge replacing gangue combined system as claimed in claim 8, characterized in that: The drying and balling device comprises: The material storage bin is connected to the pelletizing machine via a pipeline for conveying pellets.

10. The combined system of biological fermentation sludge replacing waste rock according to any one of claims 2 to 7, characterized in that: The drying and balling device comprises: A pressure measuring piece is installed on the dryer and is used to detect the air pressure in the air flow channel.

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