CN215723119U - High-parameter waste heat boiler utilizing waste heat of coke oven - Google Patents
High-parameter waste heat boiler utilizing waste heat of coke oven Download PDFInfo
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- CN215723119U CN215723119U CN202121690201.0U CN202121690201U CN215723119U CN 215723119 U CN215723119 U CN 215723119U CN 202121690201 U CN202121690201 U CN 202121690201U CN 215723119 U CN215723119 U CN 215723119U
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Abstract
A high-parameter waste heat boiler utilizing waste heat of a coke oven. At present, the available energy of the waste gas discharged by the coke oven is very high, and if the waste gas is directly discharged, the energy is wasted and the environment is polluted. A high-parameter waste heat boiler utilizing waste heat of a coke oven comprises the following components: high parameter exhaust-heat boiler body (3), the first flue left and right sides on the high parameter exhaust-heat boiler body is connected with flue entry (4) respectively, the high parameter exhaust-heat boiler body includes high temperature over heater (5), high temperature over heater is connected with high temperature reheater (6), high temperature reheater is connected with low temperature over heater (7), low temperature over heater is connected with low temperature reheater (8), low temperature reheater passes through the second flue and is connected with high pressure evaporator (9), high pressure evaporator is connected with economizer (10), the economizer is connected with low pressure evaporator (11), low pressure evaporator is connected with exhanst gas outlet (13). The utility model is applied to the field of boilers.
Description
Technical Field
The utility model relates to a high-parameter waste heat boiler utilizing waste heat of a coke oven.
Background
With the increasing environmental protection situation, the pressure born by the steel industry of 'pollution of households' is larger and larger, a novel environment-friendly coke oven process is produced at the same time, but how to efficiently utilize a large amount of waste heat produced after clean coking does not have a mature process in the current market.
At present, a small-capacity high-parameter multi-flow waste heat utilization boiler is used, the evaporation capacity of main steam is 50t/h, the quantity of reheat steam is 65t/h, the flow of low-pressure steam is 3t/h, the parameter pressure of the main steam is 14MPa, and the temperature is 540 ℃; the reheat steam parameter pressure is about 3.0MPa and the temperature is 540 deg.C, the low pressure steam parameter pressure is about 0.8MPa and the temperature is about 170 deg.C. The defect of low efficiency caused by adopting middle-temperature and middle-pressure parameters (3.8 MPa, 450 ℃) for 50t/h evaporation capacity in the past is overcome, and the waste heat utilization is greatly improved.
In order to adapt to the high-temperature waste heat utilization of a clean, environment-friendly and energy-saving intelligent tamping heat recovery coke oven, the high-parameter waste heat boiler for the waste heat of the coke oven is developed. Coking coal is tamped into coal cakes in a tamping station and is sent into a coke oven, the coke oven heats the coking coal, the temperature of incompletely combusted waste gas discharged from the coke oven is 1050-1250 ℃, the available energy is very high, the hot waste gas also contains a large amount of sulfur dioxide, because high-temperature flue gas is difficult to add a desulfurization facility, if the flue gas is directly discharged, not only energy is wasted, but also the environment is polluted, and the requirements of enterprise energy conservation and local environmental protection are not met. The best way of comprehensively utilizing the waste gas of the high-temperature coke oven is to construct a waste heat boiler and a generator set in a matching way.
Disclosure of Invention
The utility model aims to provide a high-parameter waste heat boiler utilizing waste heat of a coke oven.
The above purpose is realized by the following technical scheme:
a high-parameter waste heat boiler utilizing waste heat of a coke oven comprises the following components: the high-parameter waste heat boiler comprises a high-parameter waste heat boiler body, wherein flue inlets are respectively connected to the left side and the right side of a first flue on the high-parameter waste heat boiler body, the high-parameter waste heat boiler body comprises a high-temperature superheater, the high-temperature superheater is connected with a high-temperature reheater, the high-temperature reheater is connected with a low-temperature superheater, the low-temperature superheater is connected with a low-temperature reheater, the low-temperature reheater is connected with a high-pressure evaporator through a second flue, the high-pressure evaporator is connected with an economizer, the economizer is connected with a low-pressure evaporator, the low-pressure evaporator is connected with a flue gas outlet, the economizer is respectively connected with a high-pressure water supply pipe and a high-pressure boiler, the high-pressure boiler is connected with the high-pressure boiler through a sewer pipe, the low-temperature superheater is connected with the high-pressure boiler through a pipeline, and a steam-water mixture is arranged in the high-pressure boiler.
The high-parameter waste heat boiler utilizing the waste heat of the coke oven is characterized in that the high-temperature superheater is connected with a main steam outlet, the low-temperature reheater is connected with a reheater inlet pipeline, the high-temperature reheater is connected with a reheater outlet, and the low-pressure evaporator is connected with the low-pressure boiler.
The high-parameter waste heat boiler utilizing the waste heat of the coke oven is characterized in that the high-parameter waste heat boiler body is connected with the clean heat recovery coking furnace through flues at two sides.
The utility model has the beneficial effects that:
1. the coking furnace of the utility model continuously generates high-temperature flue gas in the coking process, the temperature of the flue gas can reach 1250 ℃, in order to utilize the high-temperature flue gas with high-efficiency waste heat, the high-temperature flue gas is sent into the high-parameter waste heat boiler of the utility model through a flue, and the high-parameter waste heat boiler is provided with a flue gas inlet flue at the left and the right respectively due to the arrangement mode of the coking furnace.
The left side and the right side of a first flue of the boiler are respectively provided with a flue inlet, flue gas enters a boiler hearth and sequentially passes through a high-temperature superheater, a high-temperature reheater, a low-temperature superheater, a low-temperature reheater and the like to exchange heat to working media in the heated surfaces, the high-temperature flue gas is gradually cooled, the high-temperature flue gas is transferred to a second flue along with a flue flow, passes through a high-pressure evaporator, an economizer and a low-pressure evaporator, the temperature of the flue gas is gradually reduced to 200 ℃, and the flue gas is discharged through a flue gas outlet and enters downstream equipment. The utility model adopts multi-flow steam to effectively utilize the waste heat of the coke oven and deeply reduce the exhaust gas temperature of the boiler. High-pressure feed water enters the economizer through a high-pressure feed water pipeline for heat exchange, and enters a high-pressure boiler barrel after being heated to a certain temperature, wherein the boiler barrel contains a steam-water mixture. Water in the boiler barrel enters a high-pressure evaporator through a downcomer to generate a steam-water mixture and then returns to the boiler barrel, saturated steam in the boiler barrel enters a low-temperature superheater through a pipeline, the absorbed heat is changed into superheated steam, the superheated steam enters a high-temperature superheater to further absorb smoke heat, the high-temperature smoke heats the superheated steam to a designed value, the main steam parameter pressure is 14MPa, the temperature is 540 ℃, the superheated steam enters a high-pressure cylinder of a steam turbine through a main steam outlet to do work, low-temperature reheated steam exhausted by a high-pressure cylinder of the steam turbine enters a low-temperature reheater of the boiler through a reheater inlet pipeline to absorb heat, the low-temperature reheated steam enters a high-temperature reheater to further absorb heat, the temperature reaches about 3.0MPa of the designed parameter pressure and is 540 ℃, and the low-pressure cylinder of the steam turbine enters a reheater outlet to do work. Meanwhile, the boiler is provided with low-pressure steam, low-pressure feed water absorbs the heat of flue gas in a low-pressure evaporator and enters a low-pressure boiler barrel, saturated steam reaches the design parameter pressure of about 0.8MPa and the temperature of about 170 ℃, and steam for a deaerator of power generation equipment is led out from the low-pressure boiler barrel 15.
Description of the drawings:
FIG. 1 is a schematic structural view of a high-parameter waste heat boiler using waste heat of a coke oven according to the present invention;
FIG. 2 is a schematic diagram of the arrangement of the coke oven and the high parameter waste heat furnace system of FIG. 1;
in the figure: 1. a clean heat recovery coking furnace comprises a clean heat recovery coking furnace body 2, a flue 3, a high-parameter waste heat boiler body 4, a flue inlet 5, a high-temperature superheater 6, a high-temperature reheater 7, a low-temperature superheater 8, a low-temperature reheater 9, a high-pressure evaporator 10, an economizer 11, a low-pressure evaporator 12, a high-pressure water supply pipe 13, a delay outlet 14, a high-pressure boiler 15, a low-pressure boiler 16, a main steam outlet 17, a reheater outlet 18 and a reheater inlet pipeline.
The specific implementation mode is as follows:
example 1:
a high-parameter waste heat boiler utilizing waste heat of a coke oven comprises the following components: a high-parameter waste heat boiler body 3, wherein the left side and the right side of a first flue on the high-parameter waste heat boiler body are respectively connected with a flue inlet 4, the high-parameter waste heat boiler body comprises a high-temperature superheater 5, the high-temperature superheater is connected with a high-temperature reheater 6, the high-temperature reheater is connected with a low-temperature superheater 7, the low-temperature superheater is connected with a low-temperature reheater 8, the low-temperature reheater is connected with a high-pressure evaporator 9 through a second flue, the high-pressure evaporator is connected with an economizer 10, the economizer is connected with a low-pressure evaporator 11, the low-pressure evaporator is connected with a flue gas outlet 13, the economizer is respectively connected with a high-pressure water supply pipe 12 and a high-pressure boiler 14, the high-pressure boiler is connected with the high-pressure evaporator through a downcomer, the low-temperature superheater is connected with the high-pressure boiler through a pipeline, and a steam-water mixture is arranged in the high-pressure boiler.
Example 2:
the high parameter waste heat boiler using waste heat of a coke oven according to embodiment 1, wherein the high temperature superheater is connected to a main steam outlet 16, the low temperature reheater is connected to a reheater inlet pipe 18, the high temperature reheater is connected to a reheater outlet 17, and the low pressure evaporator is connected to a low pressure boiler 15.
Example 3:
the high parameter waste heat boiler using waste heat of the coke oven according to embodiment 1 or 2, wherein the high parameter waste heat boiler body is connected with a clean heat recovery coking furnace 1 through two side flues 2.
Claims (3)
1. A high-parameter waste heat boiler utilizing waste heat of a coke oven comprises the following components: high parameter exhaust-heat boiler body, characterized by: the high-parameter waste heat boiler comprises a high-parameter waste heat boiler body, wherein the left side and the right side of a first flue on the high-parameter waste heat boiler body are respectively connected with a flue inlet, the high-parameter waste heat boiler body comprises a high-temperature superheater, the high-temperature superheater is connected with a high-temperature reheater, the high-temperature reheater is connected with a low-temperature superheater, the low-temperature superheater is connected with a low-temperature reheater, the low-temperature reheater is connected with a high-pressure evaporator through a second flue, the high-pressure evaporator is connected with an economizer, the economizer is connected with a low-pressure evaporator, the low-pressure evaporator is connected with a flue gas outlet, the economizer is respectively connected with a high-pressure water supply pipe and a high-pressure boiler, the high-pressure boiler is connected with the high-pressure boiler through a sewer pipe, the low-temperature superheater is connected with the high-pressure boiler through a pipeline, and a steam-water mixture is arranged in the high-pressure boiler.
2. The high parameter waste heat boiler using coke oven waste heat of claim 1, which is characterized in that: the high-temperature superheater is connected with a main steam outlet, the low-temperature reheater is connected with a reheater inlet pipeline, the high-temperature reheater is connected with a reheater outlet, and the low-pressure evaporator is connected with a low-pressure boiler.
3. The high parameter waste heat boiler using coke oven waste heat of claim 1, which is characterized in that: the high-parameter waste heat boiler body is connected with the clean heat recovery coking furnace through the flues at two sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121690201.0U CN215723119U (en) | 2021-07-23 | 2021-07-23 | High-parameter waste heat boiler utilizing waste heat of coke oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121690201.0U CN215723119U (en) | 2021-07-23 | 2021-07-23 | High-parameter waste heat boiler utilizing waste heat of coke oven |
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| CN215723119U true CN215723119U (en) | 2022-02-01 |
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| CN202121690201.0U Active CN215723119U (en) | 2021-07-23 | 2021-07-23 | High-parameter waste heat boiler utilizing waste heat of coke oven |
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2021
- 2021-07-23 CN CN202121690201.0U patent/CN215723119U/en active Active
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