Clinker line kiln tail steam waste heat utilization structure

Abstract

The utility model belongs to a clinker line kiln tail steam waste heat utilization structure in the technical field of cement production clinker lines. A superheater (3) is arranged at the position, close to the top, in the cement kiln head boiler (1), a kiln tail boiler main steam pipeline (4) of the cement kiln tail boiler (2) is communicated with an inlet of the superheater (3), an outlet of the superheater (3) is communicated with a steam turbine (6) through a superheater outlet pipeline (5), and the kiln tail boiler main steam pipeline (4) of the cement kiln tail boiler (2) is communicated with the steam turbine (6) through a branch pipeline (7). The clinker line kiln tail steam waste heat utilization structure is simple in structure, kiln tail superheated steam enters a main steam power generation system after being reheated through the superheater, the problem that steam carries water is solved, meanwhile, boiler steam energy is effectively recycled, resource waste is avoided, and the purposes of environmental protection and energy conservation are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cement production clinker line technical field, more specifically, relate to a kind of clinker line kiln tail steam waste heat utilization structure. BACKGROUND

[0002] The boiler superheater is used to recover the energy of the boiler flue gas, so that the steam discharged from the boiler can be heated to become dry steam, which is beneficial to improve the thermal efficiency of the boiler and to avoid water hammer in the steam turbine. The regenerator is used to recover the energy from the exhaust steam of the steam turbine and heat the circulating water entering the boiler. With the continuous optimization of the cement process, many cement and clinker production lines are undergoing energy-saving reconstruction. The original five-stage preheater is replaced by a six-stage preheater. After the preheater is reconstructed, the main steam temperature of the kiln tail boiler decreases, and there is a risk of steam carrying water.

[0003] In the prior art, there is a technology named "kiln heating method and kiln heating device" with publication (announcement) number "CN112082392A". The technology discloses a kiln heating method, which comprises the following steps: providing an alcohol cracking device, and connecting the outlet of the alcohol cracking device with the fuel gas inlet of the kiln; pouring methanol into the inlet of the alcohol cracking device, so that the methanol undergoes a cracking reaction in the alcohol cracking device to generate combustible cracking gas, and the combustible cracking gas is poured into the fuel gas inlet of the kiln. The superheater and the reactor in the alcohol cracking device use the heat conduction oil provided by the electric heating heat conduction oil furnace as the heat source; a preheater is provided, which is in communication with the heat conduction oil outlet of the superheater and the heat conduction oil outlet of the reactor, and the kiln tail gas with heat is recovered. The kiln tail gas is used for heat exchange with the heat conduction oil flowing into the preheater, and the heat exchanged heat conduction oil is poured into the electric heating heat conduction oil furnace. It can reduce the cost, effectively reduce the heat pollution, and achieve more energy saving and environmental protection. The present application also discloses a kiln heating device.

[0004] In the prior art, there is a technology named "kiln heating device" with publication (announcement) number "CN212673869U". The technology discloses a kiln heating device, which comprises a kiln, an alcohol cracking device, an electric heating heat conduction oil furnace and a preheater. The alcohol cracking device at least comprises a superheater and a reactor which are in communication. The superheater is used to heat and vaporize the methanol, and the vaporized methanol is heated to the temperature required for cracking reaction. The reactor is used to promote the vaporized methanol heated by the superheater to undergo a cracking reaction. The outlet of the reactor is in communication with the fuel gas inlet. The electric heating heat conduction oil furnace is used to provide heat conduction oil for the superheater and the reactor. The heat conduction oil outlet of the superheater and the heat conduction oil outlet of the reactor are in communication with the first inlet of the preheater. The first outlet of the preheater is in communication with the electric heating heat conduction oil furnace. The tail gas outlet is in communication with the second inlet of the preheater. The second outlet of the preheater is in communication with the outside. It can reduce the cost, effectively reduce the heat pollution, and achieve more energy saving and environmental protection.

[0005] However, the technology does not involve the technical problems and technical solutions of the present application. Utility model content

[0006] The technical problem solved by the utility model is: in view of the shortage of prior art, provide a simple structure, through the kiln tail superheated steam after reheating in the main steam power generation system, solve the steam water problem, effectively realize the reuse of boiler steam energy, avoid resource waste, improve the environmental protection, energy saving purpose clinker line kiln tail steam waste heat utilization structure.

[0007] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0008] The utility model discloses a clinker line kiln tail steam waste heat utilization structure, and the boiler body includes cement kiln head boiler and cement kiln tail boiler, and the superheater is arranged in the cement kiln head boiler and is close to the top position, and the kiln tail boiler main steam pipeline of the cement kiln tail boiler is connected with the superheater inlet, and the superheater outlet is connected with the steam turbine through the superheater outlet pipeline, and the kiln tail boiler main steam pipeline of the cement kiln tail boiler is connected with the steam turbine through the branch pipe pipeline.

[0009] The superheater includes a first heat exchanger and a second heat exchanger.

[0010] The heater outlet pipeline is connected with the steam turbine through the main steam mother pipe.

[0011] The kiln head boiler main steam pipeline of the cement kiln head boiler is connected with the main steam mother pipe.

[0012] The kiln tail boiler main steam pipeline is provided with a kiln tail boiler main steam pipeline valve, and the kiln tail boiler main steam pipeline valve is connected with a control component.

[0013] The branch pipe pipeline is provided with a branch pipe pipeline valve, and the branch pipe pipeline valve is connected with a control component.

[0014] The heater outlet pipeline is provided with a heater outlet pipeline valve, and the heater outlet pipeline valve is connected with a control component.

[0015] The kiln head boiler main steam pipeline is provided with a kiln head boiler main steam pipeline valve, and the kiln head boiler main steam pipeline valve is connected with a control component.

[0016] The steam turbine is connected with a generator.

[0017] The technical scheme of the utility model has the following working principle and beneficial effects:

[0018] The utility model discloses a clinker line kiln tail steam waste heat utilization structure, cement kiln head boiler inside is close to the position of top and is provided with superheater, and superheater can set two stages, and superheater is located cement kiln head boiler top, and the kiln tail boiler main steam pipeline of cement kiln tail boiler is connected through the inlet of superheater, and the steam utilization of superheater is the steam generated by cement kiln tail boiler, and the outlet of superheater is connected with steam turbine through superheater outlet pipeline, and the steam of superheater outlet pipeline is used to supply steam turbine work, and the steam generated by cement kiln tail boiler supplies superheater first, and then supplies steam turbine, realizes the twice use of steam energy, and the kiln tail boiler main steam pipeline of cement kiln tail boiler is connected with steam turbine through branch pipe pipeline. Branch pipe pipeline is used as a bypass spare, when the kiln head boiler is shut down, the cement kiln tail boiler still can supply steam through branch pipe pipeline and directly enter steam turbine, guarantee steam turbine operation. Make full use of energy, realize the purpose of environmental protection and energy saving effectively. BRIEF DESCRIPTION OF DRAWINGS

[0019] The following is a brief description of the content expressed by each drawing of the present specification and the marks in the drawings:

[0020] Figure 1 It is the structure schematic diagram of the clinker line kiln tail steam waste heat utilization structure of the utility model;

[0021] Figure 2 It is the arrangement structure schematic diagram of the heat exchanger of the cement kiln head boiler of the clinker line kiln tail steam waste heat utilization structure of the utility model;

[0022] The marks in the drawings are respectively: 1, cement kiln head boiler; 2, cement kiln tail boiler; 3, superheater; 4, kiln tail boiler main steam pipeline; 5, superheater outlet pipeline; 6, steam turbine; 7, branch pipe pipeline; 8, primary heat exchanger; 9, secondary heat exchanger; 10, main steam header; 11, kiln head boiler main steam pipeline; 12, kiln tail boiler main steam pipeline valve; 13, branch pipe pipeline valve; 14, superheater outlet pipeline valve; 15, kiln head boiler main steam pipeline valve; 16, generator. DETAILED DESCRIPTION

[0023] The following is a brief description of the content expressed by each drawing of the present specification and the marks in the drawings:

[0024] As attached Figure 1 - attached Figure 2The utility model discloses a clinker line kiln tail steam waste heat utilization structure, and boiler body includes cement kiln kiln head boiler 1 and cement kiln kiln tail boiler 2, and the superheater 3 is set up in cement kiln kiln head boiler 1 inside near top position, and the kiln tail boiler main steam pipeline 4 of cement kiln kiln tail boiler 2 is connected through the inlet of superheater 3, and the outlet of superheater 3 is communicated steam turbine 6 through superheater outlet pipeline 5, and the kiln tail boiler main steam pipeline 4 of cement kiln kiln tail boiler 2 is communicated steam turbine 6 through branch pipe line 7.The above-mentioned structure, for the deficiency in the prior art, proposes the technical scheme of improvement.Structure sets up, and boiler body includes cement kiln kiln head boiler 1 and cement kiln kiln tail boiler 2, and the superheater 3 is set up in cement kiln kiln head boiler 1 inside near top position, and the superheater 3 can set up two stages, and the superheater is located cement kiln kiln head boiler 1 top, and the kiln tail boiler main steam pipeline 4 of cement kiln kiln tail boiler 2 is connected through the inlet of superheater 3, that is, the steam utilization of superheater is the steam generated by cement kiln kiln tail boiler 2, and the outlet of superheater 3 is communicated steam turbine 6 through superheater outlet pipeline 5, and the steam of superheater outlet pipeline 5 is used to supply steam turbine work, and the steam generated by cement kiln kiln tail boiler 2 supplies superheater first, and then supplies steam turbine 6, realizes the twice use of steam energy, and the kiln tail boiler main steam pipeline 4 of cement kiln kiln tail boiler 2 is communicated steam turbine 6 through branch pipe line 7.Branch pipe line 7 as bypass standby, when kiln head boiler is shut down, cement kiln kiln tail boiler 2 still can directly supply steam into steam turbine through branch pipe line 7 to guarantee steam turbine operation.The clinker line kiln tail steam waste heat utilization structure of the utility model, simple structure, through the reheating of kiln tail superheated steam after passing through superheater and then entering main steam power generation system, solves the steam water problem, and effectively realizes the reuse of boiler steam energy, avoids resource waste, improves environmental protection and energy saving purposes.

[0025] The superheater 3 includes a primary heat exchanger 8 and a secondary heat exchanger 9.The above-mentioned structure, the primary heat exchanger 8 is original, and the secondary heat exchanger 9 is added.Through the superheater, the steam water problem can be effectively solved.The steam of superheater comes from the kiln tail boiler.

[0026] The heater outlet pipeline 5 is communicated steam turbine 6 through main steam mother pipe 10.The above-mentioned structure, the steam after passing through superheater is discharged from heater outlet pipeline 5, then enters main steam mother pipe 10, and then is supplied to steam turbine 6, to ensure that steam turbine can normally generate electricity.

[0027] The kiln head boiler main steam pipeline 11 of cement kiln kiln head boiler 1 is communicated main steam mother pipe 10.The above-mentioned structure, the steam generated when cement kiln kiln head boiler 1 works is also supplied to steam turbine 6 for operation.In this way, sufficient steam can be ensured when steam turbine 6 generates electricity.

[0028] The kiln tail boiler main steam pipeline 4 is provided with a kiln tail boiler main steam pipeline valve 12, and the kiln tail boiler main steam pipeline valve 12 is connected with a control component.

[0029] The branch pipeline 7 is provided with a branch pipeline valve 13, and the branch pipeline valve 13 is connected with a control component. According to needs, the control component can conveniently and reliably control the opening and closing of the branch pipeline valve 13. When the kiln head boiler is shut down, the branch pipeline 7 supplies steam to the steam turbine.

[0030] The heater outlet pipeline 5 is provided with a heater outlet pipeline valve 14, and the heater outlet pipeline valve 14 is connected with a control component. According to needs, the control component can conveniently and reliably control the opening and closing of the heater outlet pipeline valve 14, so as to realize steam supply on-off control.

[0031] The kiln head boiler main steam pipeline 11 is provided with a kiln head boiler main steam pipeline valve 15, and the kiln head boiler main steam pipeline valve 15 is connected with a control component. According to needs, the control component can conveniently and reliably control the opening and closing of the kiln head boiler main steam pipeline valve 15, so as to realize steam supply on-off control. The steam turbine 6 is connected with a generator 16, so as to realize power generation operation.

[0032] The clinker line kiln tail steam waste heat utilization structure, the boiler body includes a cement kiln head boiler 1 and a cement kiln tail boiler 2, the superheater 3 is arranged in the cement kiln head boiler 1 and is close to the top position, the superheater 3 can be provided with two stages, the superheater is located at the top of the cement kiln head boiler 1, the kiln tail boiler main steam pipeline 4 of the cement kiln tail boiler 2 is connected with the inlet of the superheater 3, that is, the steam utilization of the superheater is the steam generated by the cement kiln tail boiler 2, the outlet of the superheater 3 is connected with the steam turbine 6 through the superheater outlet pipeline 5, and the steam of the superheater outlet pipeline 5 is used to supply the steam turbine to work.

[0033] The above-mentioned utility model has been described by way of example in connection with the drawings, and obviously, the specific implementation of the utility model is not limited by the above-mentioned mode, and various improvements are made by adopting the method concept and technical scheme of the utility model, or the concept and technical scheme of the utility model are directly applied to other occasions without improvement, and all fall within the protection scope of the utility model.

Claims

1. A clinker line kiln tail steam waste heat utilization structure, characterized in that: The boiler body comprises a cement kiln head boiler (1) and a cement kiln tail boiler (2), the superheater (3) is arranged inside the cement kiln head boiler (1) near the top position, the kiln tail boiler main steam pipeline (4) of the cement kiln tail boiler (2) is connected with the inlet of the superheater (3), the outlet of the superheater (3) is communicated with the steam turbine (6) through the superheater outlet pipeline (5), and the kiln tail boiler main steam pipeline (4) of the cement kiln tail boiler (2) is communicated with the steam turbine (6) through the branch pipeline (7).

2. The clinker line kiln tail steam waste heat utilization structure according to claim 1, characterized in that: The superheater (3) comprises a first heat exchanger (8) and a second heat exchanger (9).

3. The clinker line kiln tail steam waste heat utilization structure according to claim 1 or 2, characterized in that: The superheater outlet pipeline (5) is communicated with the steam turbine (6) through the main steam mother pipe (10).

4. The clinker line kiln tail steam waste heat utilization structure according to claim 3, characterized in that: The kiln head boiler main steam pipeline (11) of the cement kiln head boiler (1) is communicated with the main steam mother pipe (10).

5. The clinker line kiln tail steam waste heat utilization structure according to claim 1 or 2, characterized in that: The kiln tail boiler main steam pipeline (4) is provided with a kiln tail boiler main steam pipeline valve (12), and the kiln tail boiler main steam pipeline valve (12) is connected with a control component.

6. The clinker line kiln tail steam waste heat utilization structure according to claim 1 or 2, characterized in that: The branch pipeline (7) is provided with a branch pipeline valve (13), and the branch pipeline valve (13) is connected with a control component.

7. The clinker line kiln tail steam waste heat utilization structure according to claim 1 or 2, characterized in that: The superheater outlet pipeline (5) is provided with a superheater outlet pipeline valve (14), and the superheater outlet pipeline valve (14) is connected with a control component.

8. The clinker line kiln tail steam waste heat utilization structure according to claim 4, characterized in that: The kiln head boiler main steam pipeline (11) is provided with a kiln head boiler main steam pipeline valve (15), and the kiln head boiler main steam pipeline valve (15) is connected with a control component.

9. The clinker line kiln tail steam waste heat utilization structure according to claim 1 or 2, characterized in that: The steam turbine (6) is connected with a generator (16).

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