CN207761721U - Coke oven ascension pipe crude gas ORC power generation system - Google Patents

Abstract

The utility model discloses a raw gas ORC power generation system of a coke oven rising pipe, which comprises a coke oven rising pipe waste heat recovery device (1), a heat exchanger (3), a heat conduction oil circulation pump (7), and a turbine generator set (9). and the organic working fluid circulation pump (11), the coke oven riser waste heat recovery device (1) can exchange heat between raw coal gas and heat transfer oil, and the heat transfer oil circulation pump (7) can make the heat transfer oil flow through the heat exchanger sequentially (3), heat transfer oil circulating pump (7) and coke oven riser waste heat recovery device (1), the organic working medium circulation pump (11) can make the organic working medium flow through the heat exchanger (3) and turbine power generation in sequence The unit (9), the organic working medium circulation pump (11), and the heat exchanger (3) can exchange heat between the heat transfer oil and the organic working medium. The coke oven riser raw gas ORC power generation system can realize efficient recovery and efficient utilization of raw gas energy in the coke oven riser, and improve the circular economic benefits of the coking process.

Description

A coke oven riser raw gas ORC power generation system

technical field

The utility model relates to the technical field of waste heat power generation, in particular to a raw gas ORC power generation system of a coke oven riser.

Background technique

The coking industry is a large energy consumer, and the process energy consumption is about 115kgce/ton of coke. From the perspective of coke oven energy expenditure, the sensible heat of coke accounts for 37% to 40%, the heat taken away by waste gas is 18% to 20%, and the sensible heat of raw coal gas accounts for 37% to 40%. Among them, raw coal gas is the main by-product of coking, and its composition is very complex. It is mainly composed of clean gas, water vapor, tar, crude benzene, etc., and the temperature is about 850 ° C. The traditional process uses 70 ° C ~ 80 ° C circulating ammonia to spray high-temperature raw gas Rapid cooling, the high-temperature heat in the raw gas is absorbed by the vaporized ammonia and water vapor, and becomes low-temperature heat at 80°C to 85°C. This low-temperature heat enters the primary cooler along with the raw gas, and is finally taken away by circulating water, resulting in energy loss. A lot of waste, and at the same time, due to the heating of the circulating water, the area of the primary cooler is large, and the consumption of circulating water is large.

Utility model content

In order to recycle the heat in the raw gas, the utility model provides a coke oven rising tube raw gas ORC power generation system, the coke oven rising tube raw gas ORC power generation system can realize the efficient recovery of raw gas energy in the coke oven rising tube Efficient utilization improves the circular economic benefits of the coking process.

The technical solution adopted by the utility model to solve the technical problem is: a coke oven rising pipe raw gas ORC power generation system, including a coke oven rising pipe waste heat recovery device, a heat exchanger, a heat transfer oil circulation pump, a turbine generator set and an organic Mass circulation pump, coke oven riser waste heat recovery device can exchange heat between raw coal gas and heat transfer oil, and heat transfer oil circulation pump can make the heat transfer oil flow through heat exchanger, heat transfer oil circulation pump and coke oven riser waste heat recovery successively The organic working medium circulating pump can make the organic working medium flow through the heat exchanger, the turbine generator set and the organic working medium circulating pump sequentially, and the heat exchanger can exchange heat between the heat transfer oil and the organic working medium.

The heat transfer oil outlet of the coke oven riser waste heat recovery device is connected to the heat transfer oil inlet of the heat exchanger, the heat transfer oil outlet of the heat exchanger is connected to the heat transfer oil circulation pump inlet, and the heat transfer oil circulation pump outlet is connected to the coke oven riser waste heat recovery The heat transfer oil inlet connection of the unit.

The coke oven riser waste gas ORC power generation system contains a plurality of coke oven riser waste heat recovery devices arranged in parallel, and the heat transfer oil outlet of each coke oven riser waste heat recovery device passes through the heat conduction oil input main pipe and the heat exchanger The oil inlet is connected, and the heat transfer oil inlet of each coke oven riser waste heat recovery device is connected to the outlet of the heat transfer oil circulation pump through the heat transfer oil pump outlet main pipe.

The coke oven rising pipe raw gas ORC power generation system also includes an expansion tank, the heat transfer oil outlet of the heat exchanger is connected to the inlet of the expansion tank through the heat transfer oil output pipe, and the outlet of the expansion tank is connected to the inlet of the heat transfer oil circulation pump.

The coke oven ascending pipe raw gas ORC power generation system also includes an oil temperature control valve. The inlet of the oil temperature control valve is connected to the heat transfer oil input main pipe through the first branch pipe of heat transfer oil, and the outlet of the oil temperature control valve is connected to the heat transfer oil second branch pipe. Heat transfer oil output pipe connection.

The coke oven rising pipe raw gas ORC power generation system also includes an oil pressure control valve. The inlet of the oil pressure control valve is connected to the heat transfer oil input main pipe through the third branch pipe of heat transfer oil, and the outlet of the oil pressure control valve is connected to the heat transfer oil fourth branch pipe. The heat conduction oil pump is connected to the main pipe, and the oil pressure control valve is set in parallel with the coke oven riser waste heat recovery device.

The turbogenerator set contains a turbine and a generator connected in sequence. The outlet of the organic working medium of the heat exchanger is connected to the inlet of the turbine, the outlet of the turbine is connected to the inlet of the organic working medium circulation pump, and the outlet of the organic working medium circulation pump is connected to the heat exchanger. The organic working medium inlet connection.

The turbine is a steam turbine, and the coke oven riser raw gas ORC power generation system also includes a condenser, the condenser is a water-cooled condenser, the outlet of the turbine is connected to the steam inlet of the condenser, and the condensed water outlet of the condenser Connect with the inlet of the organic working fluid circulation pump.

The coke oven riser waste heat recovery device consists of an inner flow tube, a heat conduction oil coil and an insulation layer that are set sequentially from the inside to the outside. There is also a heat-resistant insulation layer between the inner flow tube and the heat preservation layer. The heat transfer oil outlet of the device and the heat transfer oil inlet of the coke oven riser waste heat recovery device are respectively located at the two ends of the heat transfer oil coil, and the two ends of the inner flow tube are respectively the raw gas inlet and the raw gas outlet.

The beneficial effects of the utility model are: the coke oven rising pipe raw gas ORC power generation system has the advantages of safety, reliability, simple system, convenient operation and high efficiency. It uses heat-conducting oil as the heat-extracting medium, utilizes the high-temperature raw coal gas in the coke oven rising pipe, and reduces the temperature of the raw coal gas by convective heat exchange through the coke oven rising pipe waste heat recovery device, and at the same time generates high-temperature heat-conducting oil that is directly used in the ORC power generation system, improving utilization efficiency . Heat transfer oil is used as the heat extraction medium. During the heat extraction process, the heat transfer oil is always in a stable liquid state and will not vaporize. Compared with vaporization cooling, there is no scaling and local steam blockage affected by water quality, which ensures the recovery of waste heat in the riser. The device operates safely for a long time; adopts coke oven riser waste heat recovery multi-branch heat transfer precision control technology, uses oil pressure control valve to achieve balanced control of heat medium flow between each riser waste heat recovery device to achieve uniform and reasonable heat extraction; adopts coke oven The constant wall surface temperature uniform and stable control technology uses the oil temperature control valve to effectively control the temperature of the inner wall of the coke oven rising pipe and the temperature of the raw gas at the outlet to prevent coking of tar vapor in the raw gas and increase the amount of waste heat recovery.

To sum up, the raw gas ORC power generation system of the coke oven rising pipe described in the utility model realizes the direct and efficient recovery and utilization of energy under the premise of ensuring the production of the coking process, reduces the energy consumption of the coking process, and improves the efficiency of the whole plant. Economic benefit, has many advantages and practical value.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model.

Fig. 1 is a structural schematic diagram of an ORC power generation system with raw gas in the coke oven riser of the utility model.

Fig. 2 is a schematic structural diagram of a coke oven riser waste heat recovery device.

1. Coke oven riser waste heat recovery device; 2. Heat transfer oil circulation pipeline; 3. Heat exchanger; 4. Oil pressure control valve; 5. Oil temperature control valve; 6. Expansion tank; 7. Heat transfer oil circulation pump; 8 . Organic working medium circulation pipeline; 9. Turbine generator set; 10. Condenser; 11. Organic working medium circulating pump;

21. Heat transfer oil input main pipe; 22. Heat transfer oil pump out main pipe; 23. Heat transfer oil output pipe; 24. First branch pipe; 25. Second branch pipe; 26. Third branch pipe; 27. Fourth branch pipe;

31. Inner tube; 32. Heat conduction oil coil; 33. Insulation layer; 34. Thermal insulation layer;

91. Turbine; 92. Generator;

101, cooling water inlet; 102, cooling water outlet.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

A coke oven riser gas ORC power generation system, comprising a coke oven riser waste heat recovery device 1, a heat exchanger 3, a heat transfer oil circulation pump 7, a turbine generator set 9, and an organic working medium circulation pump 11, the coke oven riser waste heat The recovery device 1 can exchange heat between the raw coal gas and the heat transfer oil, and the heat transfer oil circulation pump 7 can make the heat transfer oil flow through the heat transfer oil circulation pipeline 2 successively through the heat exchanger 3, the heat transfer oil circulation pump 7 and the coke oven riser waste heat The recovery device 1, the organic working medium circulating pump 11 can make the organic working medium circulate through the heat exchanger 3, the turbine generator set 9 and the organic working medium circulating pump 11 successively through the organic working medium circulating pipeline 8, and the heat exchanger 3 can make the The heat transfer oil exchanges heat with the organic working fluid, as shown in Figure 1.

The coke oven riser waste heat recovery device 1 replaces the original coke oven riser of the coke oven. The high-temperature raw gas generated by the coke oven enters the coke oven riser waste heat recovery device 1 as a heat source, and heat transfer oil is used as a heat medium for coke oven recovery. The waste heat of high-temperature raw gas and high-temperature heat-conducting oil are directly used in the ORC power generation system. The heat-conducting oil is forced to circulate through the heat-conducting oil circulation pump 7; The first cycle flows, heat is absorbed in the heat exchanger 3, work is done in the turbine generator set 9, and heat is released in the condenser 10, realizing the organic Rankine cycle; in addition, the raw gas ORC power generation system of the coke oven riser also includes instruments Electronic control system, etc.

In this embodiment, the heat transfer oil outlet of the coke oven riser waste heat recovery device 1 is connected to the heat transfer oil inlet of the heat exchanger 3, and the heat transfer oil outlet of the heat exchanger 3 is connected to the inlet of the heat transfer oil circulation pump 7, and the heat transfer oil circulates The outlet of the pump 7 is connected with the heat transfer oil inlet of the coke oven riser waste heat recovery device 1 . The coke oven riser raw gas ORC power generation system includes a plurality of coke oven riser waste heat recovery devices 1 arranged in parallel, and the heat transfer oil outlet of each coke oven riser waste heat recovery device 1 passes through the heat transfer oil input main pipe 21 and heat exchange The heat transfer oil inlet of the device 3 is connected, and the heat transfer oil inlet of each coke oven riser waste heat recovery device 1 is connected to the outlet of the heat transfer oil circulation pump 7 through the heat transfer oil pump out main pipe 22 .

In this embodiment, the coke oven rising pipe raw gas ORC power generation system further includes an expansion tank 6, the heat transfer oil outlet of the heat exchanger 3 is connected to the inlet of the expansion tank 6 through a heat transfer oil output pipe 23, and the outlet of the expansion tank 6 Connect with the inlet of heat transfer oil circulation pump 7. The coke oven ascending pipe raw gas ORC power generation system also includes an oil temperature control valve 5, the inlet of the oil temperature control valve 5 is connected to the heat transfer oil input main pipe 21 through the first branch pipe 24 of the heat transfer oil, and the outlet of the oil temperature control valve 5 is connected through the heat conduction oil The oil second branch pipe 25 is connected with the heat conduction oil output pipe 23 .

In this embodiment, the coke oven rising pipe raw gas ORC power generation system further includes an oil pressure control valve 4, the inlet of the oil pressure control valve 4 is connected to the heat transfer oil input main pipe 21 through the third branch pipe 26 of heat transfer oil, and the oil pressure control The outlet of the valve 4 is connected to the heat transfer oil pump out main pipe 22 through the fourth heat transfer oil branch pipe 27, and the oil pressure control valve 4 is arranged in parallel with the coke oven riser waste heat recovery device 1. The inlet end of the third branch pipe 26 of heat transfer oil is located between the inlet end of the first branch pipe 24 of heat transfer oil and the outlet of the coke oven riser waste heat recovery device 1, and the outlet end of the third branch pipe 26 of heat transfer oil is located at the outlet of the heat transfer oil circulation pump 7 Between the end and the inlet of the coke oven riser waste heat recovery device 1, as shown in Figure 1.

The oil pressure control valve 4 can realize the precise control of multi-branch heat exchange in coke oven riser waste heat recovery, and achieve the purpose of balanced control of the heat medium flow rate and reasonable heat extraction in each existing coke oven riser waste heat recovery device 1. The oil temperature control valve 5 can realize the uniform and stable control of the wall surface temperature of the coke oven, prevent coking of tar vapor in the raw coal gas, and increase the amount of waste heat recovery at the same time.

In this embodiment, the turbogenerator set 9 contains a turbine 91 and a generator 92 connected in sequence, the outlet of the organic working medium of the heat exchanger 3 is connected to the inlet of the turbine 91, and the outlet of the turbine 91 is connected to the inlet of the organic working medium circulation pump 11 The outlet of the organic working medium circulation pump 11 is connected with the organic working medium inlet of the heat exchanger 3 .

In this embodiment, the turbine 91 is a steam turbine, and the output of the organic working medium outlet of the heat exchanger 3 after heat exchange is high-temperature steam. The coke oven riser gas ORC power generation system also includes a condenser 10, which The condenser 10 is a water-cooled condenser. The condenser 10 includes a cooling water inlet 101 and a cooling water outlet 102. The outlet of the turbine 91 is connected to the steam inlet of the condenser 10. The above-mentioned high-temperature steam releases heat from the condenser in the form of condensed water. The condensed water outlet of the condenser 10 is discharged, and the condensed water outlet of the condenser 10 is connected with the inlet of the organic working fluid circulation pump 11.

In this embodiment, the coke oven riser waste heat recovery device 1 includes an inner flow tube 31, a heat transfer oil coil 32, and an insulation layer 33 that are sequentially sleeved from the inside to the outside. As shown in FIG. 2, the inner flow tube 31 and the insulation layer 33 is also provided with a thermal insulation layer 34, the inner flow tube 31 is a cylindrical structure with both ends open, the coke oven riser waste heat recovery device 1 is in an upright state, and the heat transfer oil of the coke oven riser waste heat recovery device 1 The outlet and the heat transfer oil inlet of the coke oven riser waste heat recovery device 1 are respectively located at the lower and upper ends of the heat transfer oil coil 32, and the lower and upper ends of the inner flow tube 31 are the raw gas inlet A and the raw gas outlet B respectively. When in use, the raw coal gas produced by the coke oven will enter from the raw gas inlet A at the lower end of the coke oven riser waste heat recovery device 1 and then be discharged from the raw gas outlet B, and the heat transfer oil will enter from the heat transfer oil inlet at the lower end of the heat transfer oil coil 32 and then from the The heat-conducting oil outlet at the upper end of the heat-conducting oil coil 32 is discharged, thereby exchanging heat between the high-temperature raw gas and the heat-conducting oil.

The waste heat recovery device 1 of the coke oven riser waste gas ORC power generation system in the coke oven riser uses heat transfer oil as the heat transfer medium to recover the waste heat of the coke oven riser waste gas and directly uses it in the ORC power generation system. The coke oven riser waste gas ORC Forced circulation is adopted in the power generation system, that is, the organic working medium passes through the organic working medium circulation pump 11 to generate pressure head circulation flow, absorb heat in the heat exchanger 3, perform work in the turbine generator set 9, and release heat in the condenser 10, Realize the organic Rankine cycle; realize the direct and efficient recovery and utilization of energy.

When in use, a plurality of coke oven riser waste heat recovery devices 1 replace the original coke oven riser respectively, and heat transfer oil is used as the heat extraction medium. During the heat extraction process, the heat transfer oil is always in a stable liquid state. 1, there will be no vaporization, and there will be no local steam blockage, etc., and the heating will be uniform, which ensures the long-term operation of the equipment; The heat exchanger 3 in the ORC power generation system exchanges heat with the organic working medium, and after the heat is transferred to the organic working medium, it returns to the coke oven riser waste heat recovery device 1 through the heat transfer oil circulation pump 7 to realize the forced circulation of heat transfer oil waste heat recovery , as indicated by the arrow in Figure 1.

In addition, the coke oven riser waste heat recovery multi-branch heat transfer precision control technology is adopted, and the oil pressure control valve 4 is used to achieve balanced control of the heat medium flow rate between each riser waste heat recovery device and the purpose of reasonable heat extraction; the constant wall surface temperature of the coke oven is adopted Uniform and stable control technology, using the oil temperature control valve 5 to effectively control the temperature of the inner wall of the coke oven rising pipe and the outlet temperature of the raw gas, preventing coking of tar vapor in the raw gas, and increasing the amount of waste heat recovery.

The above is only a specific embodiment of the utility model, and it cannot limit the scope of utility model implementation, so the replacement of its equivalent components, or the equivalent changes and modifications made according to the patent protection scope of the utility model should still belong to areas covered by this patent. In addition, the technical features and technical features, technical features and technical solutions, and technical solutions and technical solutions in the utility model can be used in free combination.

Claims (9)

1. a kind of coke oven coke oven uprising tube raw coke oven gas ORC electricity generation systems, which is characterized in that the coke oven coke oven uprising tube raw coke oven gas ORC power generations System include Riser waste heat recovery device for coke oven (1), heat exchanger (3), heat conduction oil circulating pump (7), turbine generation unit (9) and Organic working medium circulating pump (11), Riser waste heat recovery device for coke oven (1) can make raw coke oven gas exchange heat with conduction oil, and conduction oil follows Ring pump (7) can make the conduction oil cyclically flow through heat exchanger (3), heat conduction oil circulating pump (7) and coke oven coke oven uprising tube waste heat successively Retracting device (1), organic working medium circulating pump (11) can make organic working medium cyclically flow through heat exchanger (3), turbine generation successively Unit (9) and organic working medium circulating pump (11), heat exchanger (3) can make the conduction oil and organic working medium exchange heat.

2. coke oven coke oven uprising tube raw coke oven gas ORC electricity generation systems according to claim 1, which is characterized in that more than coke oven coke oven uprising tube The conduction oil outlet of heat reclamation device (1) is connect with the heat conducting oil inlet of heat exchanger (3), the conduction oil outlet of heat exchanger (3) with The entrance of heat conduction oil circulating pump (7) connects, outlet and the Riser waste heat recovery device for coke oven (1) of heat conduction oil circulating pump (7) Heat conducting oil inlet connects.

3. coke oven coke oven uprising tube raw coke oven gas ORC electricity generation systems according to claim 2, which is characterized in that the coke oven rises Pipe raw coke oven gas ORC electricity generation systems contain multiple Riser waste heat recovery device for coke oven (1) being arranged in parallel, each coke oven coke oven uprising tube The conduction oil outlet of waste-heat recovery device (1) inputs manifold (21) by conduction oil and the heat conducting oil inlet of heat exchanger (3) connects It connects, the heat conducting oil inlet of each Riser waste heat recovery device for coke oven (1) pumps out manifold (22) and conduction oil by conduction oil The outlet of circulating pump (7) connects.

4. coke oven coke oven uprising tube raw coke oven gas ORC electricity generation systems according to claim 3, which is characterized in that the coke oven rises Pipe raw coke oven gas ORC electricity generation systems further include expansion tank (6), and the conduction oil outlet of heat exchanger (3) passes through conduction oil efferent duct (23) It is connect with the entrance of expansion tank (6), the outlet of expansion tank (6) is connect with the entrance of heat conduction oil circulating pump (7).

5. coke oven coke oven uprising tube raw coke oven gas ORC electricity generation systems according to claim 4, which is characterized in that the coke oven rises Pipe raw coke oven gas ORC electricity generation systems further include oil temperature control valve (5), and the entrance of oil temperature control valve (5) passes through the first branch pipe of conduction oil (24) it is connect with conduction oil input manifold (21), the outlet of oil temperature control valve (5) passes through the second branch pipe of conduction oil (25) and heat conduction Oily efferent duct (23) connection.

6. coke oven coke oven uprising tube raw coke oven gas ORC electricity generation systems according to claim 5, which is characterized in that the coke oven rises Pipe raw coke oven gas ORC electricity generation systems further include pressure control valve (4), and the entrance of pressure control valve (4) passes through conduction oil third branch pipe (26) it is connect with conduction oil input manifold (21), the outlet of pressure control valve (4) passes through the 4th branch pipe (27) of conduction oil and heat conduction Oil pump goes out manifold (22) connections, and pressure control valve (4) is arranged in parallel with Riser waste heat recovery device for coke oven (1).

7. coke oven coke oven uprising tube raw coke oven gas ORC electricity generation systems according to claim 1, which is characterized in that turbine generation unit (9) contain sequentially connected turbine (91) and generator (92), organic working medium outlet and the turbine (91) of heat exchanger (3) Entrance connects, and the outlet of turbine (91) is connect with the entrance of organic working medium circulating pump (11), organic working medium circulating pump (11) Outlet is connect with the organic working medium entrance of heat exchanger (3).

8. coke oven coke oven uprising tube raw coke oven gas ORC electricity generation systems according to claim 7, which is characterized in that turbine (91) is Steam turbine, the coke oven coke oven uprising tube raw coke oven gas ORC electricity generation systems further include condenser (10), and condenser (10) is water condensation The outlet of vapour device, turbine (91) is connect with the steam inlet of condenser (10), the condensation-water drain of condenser (10) with it is organic The entrance of working medium circulating pump (11) connects.

9. coke oven coke oven uprising tube raw coke oven gas ORC electricity generation systems according to claim 2, which is characterized in that more than coke oven coke oven uprising tube Heat reclamation device (1) contains interior flow cartridge (31), conduction oil coil pipe (32) and the insulating layer (33) being arranged successively from inside to outside, interior stream It is additionally provided with thermal resistance thermal insulation layer (34), the conduction oil of Riser waste heat recovery device for coke oven (1) between cylinder (31) and insulating layer (33) The heat conducting oil inlet of outlet and Riser waste heat recovery device for coke oven (1) is located at the both ends of the conduction oil coil pipe (32), interior The both ends of flow cartridge (31) are respectively raw coke oven gas entrance and raw coke oven gas outlet.