Heat energy recycling system for carbon petroleum coke pot-type calcining furnace

Abstract

The utility model relates to the field of waste heat utilization, in particular to a heat energy recycling system of a carbon petroleum coke pot type calcining furnace. The system comprises a water adding pipe, a steam pocket, an evaporator, a communicating assembly, a power generation device, a water conveying assembly and a boiler water supply pipeline. The steam pocket is provided with a water inlet end, a water outlet end, a mixed steam end and a steam outlet end; the water adding pipe communicates with the steam pocket water inlet end; the input end of the evaporator communicates with the steam pocket water outlet end, and the output end communicates with the steam pocket mixed steam end; the power generation device comprises a deaerator, and the deaerator is provided with a demineralized water end, a steam inlet end and a drainage end; the two ends of the communicating assembly communicate with the steam outlet end of the steam pocket and the steam inlet end of the deaerator correspondingly. The water conveying assembly is communicated with the demineralized water end of the deaerator; and the boiler water supply pipeline is communicated with the drainage end of the deaerator. According to the utility model, the waste heat of the petroleum coke of the calcining furnace can be effectively utilized, and meanwhile, process water is combined for deoxidizing treatment.

Description

Technical Field

[0001] This utility model relates to the field of waste heat utilization, and in particular to a heat energy recovery and utilization system for a carbon petroleum coke calcining furnace. Background Technology

[0002] During the calcination process of carbon petroleum coke in a tank calciner, high-temperature calcined coke and high-temperature flue gas at around 1000℃ are discharged. Currently, both domestically and internationally, traditional water-cooled jackets are commonly used to cool the high-temperature calcined coke. The water-cooled jackets carry away the high-temperature waste heat through cooling circulating water, but this part of the heat is not utilized, resulting in a waste of waste heat energy. Utility Model Content

[0003] The purpose of this invention is to address the problems existing in the background technology by proposing a heat energy recovery and utilization system for a carbon petroleum coke calcining furnace, which can effectively utilize the waste heat of petroleum coke in the calcining furnace and simultaneously combine it with process water for deoxygenation treatment.

[0004] The technical solution of this utility model is a heat energy recovery and utilization system for a carbon petroleum coke calcining furnace, comprising a water supply pipe, a steam drum, an evaporator, a connecting component, a power generation device, a water supply component, and a boiler feedwater pipeline; the steam drum has a water inlet end, a water outlet end, a mixed water-steam end, and a steam outlet end; the water supply pipe is connected to the water inlet end of the steam drum; the input end of the evaporator is connected to the water outlet end of the steam drum, and the output end is connected to the mixed water-steam end of the steam drum; the power generation device includes a deaerator, which has a demineralized water end, a steam inlet end, and a drain end; the two ends of the connecting component are respectively connected to the steam outlet end of the steam drum and the steam inlet end of the deaerator; the water supply component is connected to the demineralized water end of the deaerator; and the boiler feedwater pipeline is connected to the drain end of the deaerator.

[0005] Preferably, the heights of the water inlet and the mixed water-steam end of the steam drum are both higher than the water outlet end and lower than the steam outlet end.

[0006] Preferably, the evaporator includes a sleeve, a first ring pipe and a second ring pipe respectively connected to both ends of the sleeve, and a plurality of heat exchange tubes connected between the first ring pipe and the second ring pipe, wherein the plurality of heat exchange tubes are attached to the inner wall of the sleeve and are evenly distributed around the sleeve.

[0007] Preferably, the first ring pipe is provided with an inlet flange, and an inlet pipe is connected between the inlet flange and the water outlet end of the steam drum; the second ring pipe is provided with an outlet flange, and a steam pipe is connected between the outlet flange and the steam-water mixing end of the steam drum.

[0008] Preferably, the connecting component includes a steam pipe, a steam header, and a low-pressure steam pipeline connected in sequence. The steam pipe is connected to the steam outlet of the steam drum, and the low-pressure steam pipeline is connected to the steam inlet of the deaerator.

[0009] Preferably, the water supply assembly includes a demineralized water pipeline connected to the demineralized water end of the deaerator and a demineralized water regulating valve installed on the demineralized water pipeline.

[0010] Preferably, a liquid level sensor and a pressure sensor are installed inside the steam drum.

[0011] Compared with the prior art, the present invention has the following beneficial technical effects:

[0012] This invention transfers waste heat from petroleum coke in a calcining furnace to water via an evaporator. The water's temperature and pressure increase, absorbing heat and converting into steam. The water and steam are separated in a steam drum. The steam is piped to the deaerator of a power generation unit, serving as one of the deaerator's heating steam sources. This saturated steam is used for thermal deaeration, reducing corrosion and scaling on the equipment. The water can then flow back into the evaporator for heat exchange. This system effectively utilizes the waste heat from the petroleum coke in the calcining furnace and simultaneously combines it with process water for deaeration. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0014] Attached reference numerals: 100, calcining furnace body; 1, water supply pipe; 2, steam drum; 3, water inlet pipe; 4, evaporator; 5, first ring pipe; 6, heat exchange pipe; 7, second ring pipe; 8, steam pipe; 9, steam guide pipe; 10, steam header; 11, low-pressure steam pipeline; 12, deaerator; 13, demineralized water pipeline; 14, demineralized water regulating valve; 15, boiler feedwater pipeline. Detailed Implementation

[0015] like Figure 1 As shown in the figure, the carbon petroleum coke calciner heat energy recovery and utilization system proposed in this embodiment includes a water supply pipe 1, a steam drum 2, an evaporator 4, a connecting component, a power generation device, a water supply component, and a boiler feedwater pipeline 15.

[0016] Steam drum 2 has a water inlet, a water outlet, a water-steam mixture end, and a steam outlet. The height of the water inlet and the water-steam mixture end is higher than that of the water outlet end, and lower than that of the steam outlet end. A liquid level sensor and a pressure sensor are installed inside steam drum 2. An industrial control computer enables real-time monitoring of the water level inside steam drum 2 and automatic water replenishment, preventing the evaporator 4 from dry-burning due to insufficient water.

[0017] Water supply pipe 1 is connected to the water inlet of steam drum 2 and is used to supply water into steam drum 2.

[0018] The evaporator 4 includes a sleeve, a first ring pipe 5 and a second ring pipe 7 connected to both ends of the sleeve, and multiple heat exchange tubes 6 connecting the first ring pipe 5 and the second ring pipe 7. The multiple heat exchange tubes 6 are attached to the inner wall of the sleeve and evenly distributed around the sleeve. The evaporator 4 is installed at the discharge port of the calcining furnace tank 100 through the sleeve, that is, directly sleeved at the discharge port of the carbon calcining furnace, which facilitates rapid cooling of the discharged high-temperature calcined petroleum coke material. An inlet flange is provided on the first ring pipe 5, and a water inlet pipe 3 is connected between the inlet flange and the water outlet of the steam drum 2. The cold water in the steam drum 2 enters the first ring pipe 5 through the water inlet pipe 3 and flows to the heat exchange tubes 6. The water absorbs the heat of the high-temperature calcined petroleum coke material through the heat exchange tubes 6 for cooling. At the same time, the water heats up and generates steam. An outlet flange is provided on the second ring pipe 7. A steam pipe 8 connects the outlet flange and the water-steam mixing end of the steam drum 2. The mixture of water and steam enters the second ring pipe 7 from the heat exchange pipe 6 and continues to enter the steam drum 2 through the steam pipe 8, thus realizing heat recovery.

[0019] One calcining furnace tank 100 corresponds to one evaporator 4. Generally, dozens of evaporators 4 are equipped. The dozens of evaporators 4 are connected together to transport the mixture of water and steam to the steam drum 2.

[0020] The power generation unit uses equipment such as steam turbine generators to convert thermal energy into mechanical energy, and then into electrical energy. The power generation unit includes a deaerator 12, which has a demineralized water end, a steam inlet end, and a drain end.

[0021] The connecting components include a steam pipe 9, a steam header 10, and a low-pressure steam pipe 11 connected in sequence. The steam pipe 9 is connected to the steam outlet of the steam drum 2, and the low-pressure steam pipe 11 is connected to the steam inlet of the deaerator 12. The steam pressure range entering the low-pressure steam pipe 11 is generally 0.1-1.0 MPa.

[0022] Inside the steam drum 2, due to the larger space, the flow rate of the steam-water mixture entering from the steam-water mixing end of the steam drum 2 decreases, achieving steam-water separation based on the difference in steam and water density. The separated steam enters the deaerator 12 of the power generation unit through the connecting component. The separated water is then transported back to the evaporator 4 through the water outlet end of the steam drum 2 to continue participating in the heat exchange process.

[0023] The water supply assembly includes a demineralized water pipeline 13 connected to the demineralized water end of the deaerator 12 and a demineralized water regulating valve 14 installed on the demineralized water pipeline 13.

[0024] The boiler feedwater pipeline 15 is connected to the drain end of the deaerator 12, so the discharged water can also be recycled.

[0025] This embodiment transfers the waste heat from the petroleum coke in the calcining furnace to water via evaporator 4. The water's temperature and pressure increase, absorbing heat and converting into steam. This steam is then piped to the deaerator 12 of the power generation unit, serving as one of the heating steam sources for the deaerator 12. This saturated steam is used for thermal deoxygenation, reducing corrosion and scaling on the equipment while simultaneously saving high-quality steam thermal energy for power generation. Therefore, this system effectively utilizes the waste heat from the petroleum coke in the calcining furnace and combines it with process water for deoxygenation, demonstrating broad application prospects and market value.

[0026] The heat recovery and utilization system for the carbon petroleum coke canister calciner of the present invention has the following advantages:

[0027] 1. It makes full use of the waste heat from calcining petroleum coke in the calcining furnace, thereby improving energy utilization efficiency.

[0028] 2. Reduced additional steam consumption: Traditional deaerator systems typically require drawing steam from the main steam header to heat demineralized water, while the steam provided by this system can completely replace this part of the steam, reducing the demand for steam from the main steam header, thereby increasing the amount of steam available for power generation and improving power generation.

[0029] 3. Improved system stability: The calcination process is generally continuous and stable, and the steam supply generated is relatively stable, which helps to maintain the stable operation of the deaerator system and reduce problems such as unstable deaeration effect caused by fluctuations in steam supply.

[0030] 4. The steam produced by this system can deoxygenate the process water, improving product quality and equipment lifespan.

[0031] 5. Low operation and maintenance costs.

[0032] 6. Effectively ensures cooling of calcined petroleum coke, increases calcination furnace capacity, and results in high product yield.

[0033] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A carbon petroleum coke tank calciner heat recovery system, characterized by, The utility model relates to a low-pressure steam turbine feedwater heating system, comprising: a steam drum (2) having a water inlet end, a water outlet end, a mixed water vapor end and a steam outlet end; a water feeding pipe (1) in communication with the water inlet end of the steam drum (2); an evaporator (4) having an input end in communication with the water outlet end of the steam drum (2) and an output end in communication with the mixed water vapor end of the steam drum (2); a power generation device comprising a deaerator (12) having a desalted water end, a steam inlet end and a water outlet end; a communication assembly having two ends in communication with the steam outlet end of the steam drum (2) and the steam inlet end of the deaerator (12), respectively; a water feeding assembly in communication with the desalted water end of the deaerator (12); a boiler feedwater line (15) in communication with the water outlet end of the deaerator (12).

2. The carbon petroleum coke tank calciner heat recovery system of claim 1, wherein, The water inlet end and the mixed water vapor end of the steam drum (2) are both higher than the water outlet end and lower than the steam outlet end.

3. The carbon petroleum coke tank calciner heat recovery system of claim 1, wherein, The evaporator (4) comprises a pipe sleeve, a first ring pipe (5) and a second ring pipe (7) connected to the two ends of the pipe sleeve, respectively, and a plurality of heat exchange pipes (6) in communication between the first ring pipe (5) and the second ring pipe (7), which are attached to the inner wall of the pipe sleeve and uniformly distributed around the pipe sleeve.

4. The carbon petroleum coke tank calciner heat recovery system of claim 3, wherein, The first ring pipe (5) is provided with an inlet flange, and the inlet flange and the water outlet end of the steam drum (2) are in communication with a water inlet pipe (3); the second ring pipe (7) is provided with an outlet flange, and the outlet flange and the mixed water vapor end of the steam drum (2) are in communication with a steam pipe (8).

5. The carbon petroleum coke tank calciner heat recovery system of claim 1, wherein, The communication assembly comprises a steam guide pipe (9), a steam collecting header (10) and a low-pressure steam pipeline (11) in sequence, the steam guide pipe (9) is in communication with the steam outlet end of the steam drum (2), and the low-pressure steam pipeline (11) is in communication with the steam inlet end of the deaerator (12).

6. The carbon petroleum coke tank calciner heat recovery system of claim 1, wherein, The water feeding assembly comprises a desalted water line (13) in communication with the desalted water end of the deaerator (12) and a desalted water regulating valve (14) arranged on the desalted water line (13).

7. The carbon petroleum coke tank calciner heat recovery system of claim 1, wherein, The steam drum (2) is provided with a liquid level sensor and a pressure sensor.

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