CN211570540U - Heat exchange medium flow automatic protection raw coke oven gas waste heat recovery heat exchanger tedge - Google Patents
Heat exchange medium flow automatic protection raw coke oven gas waste heat recovery heat exchanger tedge Download PDFInfo
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- CN211570540U CN211570540U CN201921620373.3U CN201921620373U CN211570540U CN 211570540 U CN211570540 U CN 211570540U CN 201921620373 U CN201921620373 U CN 201921620373U CN 211570540 U CN211570540 U CN 211570540U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The utility model relates to a raw coke oven gas waste heat recovery heat exchanger tedge of heat transfer medium flow automatic protection, it includes waste heat recovery heat exchanger tedge (1), around putting on waste heat recovery heat exchanger tedge (1) pipe wall has the heat transfer medium pipe, the heat transfer medium pipe is including heat exchange cold medium import (2) and heat exchange cold medium export (3), heat exchange cold medium import (2) department is provided with heat exchange cold medium import balanced valve (12). The utility model discloses a switch of raw coke oven gas exit differential pressure or import pressure control heat transfer medium in case the tedge heat exchanger inefficacy causes interior hourglass, can cause the increase of the differential pressure of raw coke oven gas passageway in the tedge, and the increased differential pressure can make this valve cut off the continuation inflow of tedge heat exchanger heat transfer medium, stops this tedge continuation operation, plays the effect of protection coke oven.
Description
Technical Field
The utility model relates to a raw coke oven gas waste heat recovery heat exchanger tedge is protected automatically to heat transfer medium flow, mainly used coke oven raw coke oven gas waste heat recovery belongs to heat exchanger technical field.
Background
The coke oven crude gas waste heat recovery riser is being popularized or is widely applied to the waste heat recovery of the coke oven crude gas. The coke oven is formed by arranging a plurality of dry distillation chambers (hearths) in parallel, each hearth is provided with one or two ascending pipes to convey the dry distilled crude gas to a bridge pipe, and after the crude gas is rapidly cooled, the crude gas is conveyed to a gas collecting pipe. The coke oven raw gas waste heat recovery riser is a riser filled with heat insulation materials and replaced with a coke oven raw gas waste heat recovery riser which is arranged on the top of the oven in parallel and connected with a gas collecting pipe in parallel. The coke oven production is intermittent production, each coke oven production process needs to go through several production processes of coal adding (loading), heating and dry distillation, coke cooking, coke pushing and the like, the coke produced by each coke oven can form a temperature curve of fire drop temperature change in several production processes of coal adding (loading), heating and dry distillation, coke cooking, coke pushing and the like, namely the real-time change of the output and components of the crude gas in the coal dry distillation process and the change of the heat exchange quantity of an ascending pipe of the crude gas waste heat recovery heat exchanger, further the change of the gasification rate of a heat exchange medium in the ascending pipe of the crude gas waste heat recovery heat exchanger, the change of the real-time pressure drop of the heat exchange medium in the ascending pipe of the crude gas waste heat recovery heat exchanger, further the change of the water inlet flow of the ascending pipe of the parallel crude gas waste heat recovery heat exchanger, namely the heat exchange quantity is increased when the crude gas output is large, the heat is taken from the ascending pipe of the waste heat recovery heat exchanger to increase the pressure, at the moment, the heat exchanger needs to increase the water inflow to be more favorable for waste heat recovery, and the actual condition is that the pressure difference of the heat exchange medium inlet and outlet in the ascending pipe of the waste heat recovery heat exchanger is increased when the ascending pipe of other waste heat recovery heat exchangers connected in parallel is actually used, at the moment, the amount of the heat exchanger needs to be reduced when the water inflow (or other heat exchange media) is reduced, and the actual condition is caused that the water flow can be increased when the ascending pipe of other. Therefore, the water (or other thermal working medium) of the heat exchange medium of the ascending pipes of the crude gas waste heat recovery heat exchangers connected in parallel is deflected, and the waste heat recovery efficiency is reduced.
In addition, water is not allowed to enter a hearth in the life cycle of the coke oven production process, and once the hearth enters water, the hearth can be damaged, so that great loss is caused, and hidden dangers are brought to safety production.
The existing method for controlling the water leakage of the ascending pipe of the waste heat recovery heat exchanger in the hearth adopts a double-layer ascending pipe inner wall structure to increase the safety coefficient, the method can cause the high-temperature corrosion damage of the metal of the jacket after the inner cylinder is damaged, and actually, only a failure delay method is adopted, so that the fundamental problem is not solved; and an instrument control method for monitoring the temperature of crude gas at the outlet of the riser is also provided, and the method has fatal defects because the actual working condition of instrument lines is not allowed on site.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a heat transfer medium flow automatic protection raw coke oven gas waste heat recovery heat exchanger tedge is provided to above-mentioned prior art, it imports and exports pressure differential or the switch of import pressure control heat transfer medium through raw coke oven gas, in case the tedge heat exchanger became invalid and causes interior hourglass, can cause the pressure differential increase of raw coke oven gas passageway in the tedge, the pressure differential of increase can make this valve cut off the continuation inflow of tedge heat exchanger heat transfer medium, stop this tedge and continue the operation, play the effect of protection coke oven.
The utility model provides a technical scheme that above-mentioned problem adopted does: a raw coke oven gas waste heat recovery heat exchanger riser with automatic protection of heat exchange medium flow comprises a waste heat recovery heat exchanger riser, wherein a heat exchange medium pipe (or other devices such as a heat jacket and the like) is wound on the pipe wall of the waste heat recovery heat exchanger riser, the heat exchange medium pipe comprises a heat exchange medium inlet and a heat exchange medium outlet, a heat exchange medium inlet balance valve is connected to the heat exchange medium inlet, the heat exchange medium inlet balance valve comprises a balance valve piston type valve core, a balance valve inlet and a balance valve outlet are respectively arranged on two sides of the balance valve piston type valve core, the balance valve outlet is connected with the heat exchange medium inlet, the balance valve inlet is connected with an external pipeline to be connected with a heat exchange medium, the upper end of the balance valve piston type valve core is connected with a third piston cavity in series, and a raw coke oven gas outlet pressure-inducing pipe nozzle is arranged on the third piston cavity, a raw coke oven gas outlet pressure leading port is arranged at the position, close to the upper end, of the ascending pipe of the waste heat recovery heat exchanger, and a raw coke oven gas outlet pressure leading pipe is connected between the raw coke oven gas outlet pressure leading port and the raw coke oven gas outlet pressure leading pipe nozzle.
Furthermore, the lower end of the piston type valve core of the balance valve is connected with a first piston cavity, a raw coke oven gas inlet pressure-leading pipe nozzle is arranged on the first piston cavity, a raw coke oven gas inlet pressure-leading port is arranged at a position, close to the lower end, of the ascending pipe of the waste heat recovery heat exchanger, and a raw coke oven gas inlet pressure-leading pipe is connected and arranged between the raw coke oven gas inlet pressure-leading port and the raw coke oven gas inlet pressure-leading pipe nozzle.
Furthermore, a check valve installed in the same direction as the heat exchange medium is arranged at the heat exchange medium outlet.
Furthermore, a balance spring is arranged in the third piston cavity.
Furthermore, a horn mouth with a large lower part and a small upper part is formed in the piston type valve core of the balance valve.
Compared with the prior art, the utility model has the advantages of:
the utility model relates to a raw coke oven gas waste heat recovery heat exchanger tedge is protected automatically to heat transfer medium flow, it is imported and exported pressure differential or import pressure control heat transfer medium's switch through raw coke oven gas, in case the tedge heat exchanger became invalid and causes interior hourglass, can cause the pressure differential increase of raw coke oven gas passageway in the tedge, the pressure differential of increase can make this valve cut off the continuation inflow of tedge heat exchanger heat transfer medium, stops this tedge continuation operation, plays the effect of protection coke oven.
Drawings
Fig. 1 is a schematic diagram of an embodiment 1 of the riser of the raw coke oven gas waste heat recovery heat exchanger with automatic protection of heat exchange medium flow of the present invention.
Fig. 2 is a schematic diagram of embodiment 2 of the riser pipe of the raw coke oven gas waste heat recovery heat exchanger with automatic protection of heat exchange medium flow.
Wherein:
ascending pipe 1 of waste heat recovery heat exchanger
Heat exchange medium inlet 2
Heat exchange medium outlet 3
Crude gas inlet pressure leading port 8
Crude gas inlet pressure pipe 9
Crude gas outlet pressure leading port 10
Crude gas outlet pressure guiding pipe 11
Heat exchange medium inlet balance valve 12
Balance valve inlet 12-1
Balanced valve outlet 12-2
Piston type valve core 12-3 of balance valve
First piston chamber 12-5
Crude gas inlet pressure-leading pipe nozzle 12-7
Third piston chamber 12-9
Balance spring 12-10
Crude gas outlet pressure guide pipe nozzle 12-12
A one-way valve 13.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
Example 1: cut-off balance valve by utilizing differential pressure of crude gas inlet and outlet of riser of waste heat recovery heat exchanger
Referring to fig. 1, the utility model relates to a raw coke oven gas waste heat recovery heat exchanger riser with automatic protection of heat exchange medium flow, which comprises a waste heat recovery heat exchanger riser 1, wherein a heat exchange medium pipe (or other devices such as a heat jacket) is wound on the pipe wall of the waste heat recovery heat exchanger riser 1, the heat exchange medium pipe comprises a heat exchange medium inlet 2 and a heat exchange medium outlet 3, the heat exchange medium inlet 2 is connected with a heat exchange medium inlet balance valve 12, the heat exchange medium inlet balance valve 12 comprises a balance valve piston type valve core 12-3, two sides of the balance valve piston type valve core 12-3 are respectively provided with a balance valve inlet 12-1 and a balance valve outlet 12-2, the balance valve outlet 12-2 is connected with the heat exchange medium inlet 2, the balance valve inlet 12-1 is connected with an outer pipeline to be connected with a heat exchange medium, the lower end of a piston type valve core 12-3 of the balance valve is connected with a first piston cavity 12-5, a crude gas inlet pressure leading pipe orifice 12-7 is arranged on the first piston cavity 12-5, the upper end of the piston type valve core 12-3 of the balance valve is connected with a third piston cavity 12-9 which is connected in series, a balance spring 12-10 is arranged in the third piston cavity 12-9, a crude gas outlet pressure leading pipe orifice 12-12 is arranged on the third piston cavity 12-9, a crude gas outlet pressure leading port 10 and a crude gas inlet pressure leading port 8 are respectively arranged on a riser 1 of the waste heat recovery heat exchanger at positions close to the upper end and the lower end, a crude gas outlet pressure leading pipe 11 is connected between the crude gas outlet pressure leading port 10 and the crude gas outlet pressure leading pipe orifice 12-12, and a crude gas inlet pressure leading pipe 11 is connected between the crude gas inlet pressure leading port 8 and the crude gas inlet pressure leading pipe orifice 12-7 9;
the heat exchange medium outlet 3 is provided with a one-way valve 13 which is installed in the same direction as the heat exchange medium, so that the situation that the heat exchange medium reversely flows into the coke oven when the ascending pipe stops continuously running is avoided.
The essence of automatic protection of the heat exchange medium flow of the riser of the raw gas waste heat recovery heat exchanger is realized by a heat exchange medium inlet balance valve 12, and the automatic protection control method comprises the following steps:
setting an initial flow, connecting a raw gas inlet pressure guide port 8 into a raw gas inlet pressure guide pipe nozzle 12-7 connected to a first piston cavity 12-5 by a raw gas inlet pressure guide pipe 9, and forming pressure P1 in the first piston cavity 12-5 communicated with the raw gas inlet pressure guide pipe nozzle; the pressure acting on the lower end face of the piston type valve core 12-3 of the balance valve is P1;
the raw gas outlet pressure leading port 10 is connected to a raw gas outlet pressure leading pipe nozzle 12-12 on a third piston cavity 12-9 by a raw gas outlet pressure leading pipe 11, a balance spring 12-10 is arranged in the third piston cavity 12-9, and the sum of the raw gas outlet pressure and the pressure of the balance spring 12-10 is P3; the pressure acting on the upper end surface of the piston type valve core 12-3 of the balance valve is P3;
the opening of the piston hole when P1 is P3 is the same as the set value, that is, the initial flow is set to be the proper proportion value of the water supply flow and the evaporation capacity which meet the heat exchange requirement of the riser 1 of the waste heat recovery heat exchanger, and at the moment, the operation of the riser 1 of the waste heat recovery heat exchanger can be realized after the opening of the piston type valve core 12-3 of the balance valve is the initial set value;
when internal leakage occurs in the riser 1 of the waste heat recovery heat exchanger, the heat exchange medium of the raw coke oven gas flowing into the riser 1 of the waste heat recovery heat exchanger is instantaneously vaporized, so that the pressure difference between P1 and P3 is sharply increased, P1 is smaller than P3, the piston type valve core 12-3 of the balance valve rapidly moves downwards to a dead point and cannot be recovered, the balance valve 12 at the inlet of the heat exchange medium is closed, and the heat exchange medium in the riser 1 of the waste heat recovery heat exchanger is cut off; because the one-way valve 13 is arranged at the heat exchange medium outlet 3 of the ascending pipe 1 of the waste heat recovery heat exchanger, the medium at the heat exchange medium outlet 3 is automatically cut off from reversely flowing into the ascending pipe 1 of the waste heat recovery heat exchanger, thereby realizing the control of preventing a large amount of heat exchange medium from flowing into the coke oven.
The balance valve is a principle for solving the change relation of flow pressure difference by utilizing a balance principle, and can be converted into a single-end pressure difference regulation type, such as a structure of a regulating valve and the like.
Example 2: pressure cut-off balance valve for crude gas outlet of riser of waste heat recovery heat exchanger
Referring to fig. 2, the utility model relates to a raw coke oven gas waste heat recovery heat exchanger riser with automatic protection of heat exchange medium flow, which comprises a waste heat recovery heat exchanger riser 1, wherein a heat exchange medium pipe (or other devices such as a heat jacket) is wound on the pipe wall of the waste heat recovery heat exchanger riser 1, the heat exchange medium pipe comprises a heat exchange medium inlet 2 and a heat exchange medium outlet 3, the heat exchange medium inlet 2 is connected with a heat exchange medium inlet balance valve 12, the heat exchange medium inlet balance valve 12 comprises a balance valve piston type valve core 12-3, two sides of the balance valve piston type valve core 12-3 are respectively provided with a balance valve inlet 12-1 and a balance valve outlet 12-2, the balance valve outlet 12-2 is connected with the heat exchange medium inlet 2, the balance valve inlet 12-1 is connected with an outer pipeline to be connected with a heat exchange medium, the upper end of the piston type valve core 12-3 of the balance valve is connected with a third piston cavity 12-9 which is connected in series, a balance spring 12-10 is arranged in the third piston cavity 12-9, a raw gas outlet pressure leading pipe mouth 12-12 is arranged on the third piston cavity 12-9, a raw gas outlet pressure leading port 10 is arranged at the position close to the upper end of the ascending pipe 1 of the waste heat recovery heat exchanger, and a raw gas outlet pressure leading pipe 11 is connected between the raw gas outlet pressure leading port 10 and the raw gas outlet pressure leading pipe mouth 12-12;
the heat exchange medium outlet 3 is provided with a one-way valve 13 which is installed in the same direction as the heat exchange medium, so that the situation that the heat exchange medium reversely flows into the coke oven when the ascending pipe stops continuously running is avoided.
The essence of automatic protection of the heat exchange medium flow of the riser of the raw gas waste heat recovery heat exchanger is realized by a heat exchange medium inlet balance valve 12, and the automatic protection control method comprises the following steps:
setting initial flow, wherein the pressure acting on the lower end face of the piston type valve core 12-3 of the balance valve is normal pressure P1;
the raw gas outlet pressure leading port 10 is connected to a raw gas outlet pressure leading pipe nozzle 12-12 on a third piston cavity 12-9 by a raw gas outlet pressure leading pipe 11, a balance spring 12-10 is arranged in the third piston cavity 12-9, and the sum of the raw gas outlet pressure and the pressure of the balance spring 12-10 is P3; the pressure acting on the upper end surface of the piston type valve core 12-3 of the balance valve is P3;
the opening of the piston hole when P1 is P3 is the same as the set value, that is, the initial flow is set to be the proper proportion value of the water supply flow and the evaporation capacity which meet the heat exchange requirement of the riser 1 of the waste heat recovery heat exchanger, and at the moment, the operation of the riser 1 of the waste heat recovery heat exchanger can be realized after the opening of the piston type valve core 12-3 of the balance valve is the initial set value;
when the riser 1 of the waste heat recovery heat exchanger has internal leakage, the heat exchange medium of the raw coke oven gas flowing into the riser 1 of the waste heat recovery heat exchanger is instantaneously vaporized, so that the pressure of P3 is rapidly increased, P1 is less than P3, the piston type valve core 12-3 of the balance valve rapidly moves downwards to a dead point and cannot recover, the heat exchange medium inlet balance valve 12 is closed, and the heat exchange medium in the riser 1 of the waste heat recovery heat exchanger is cut off; because the one-way valve 13 is arranged at the heat exchange medium outlet 3 of the ascending pipe 1 of the waste heat recovery heat exchanger, the medium at the heat exchange medium outlet 3 is automatically cut off from reversely flowing into the ascending pipe 1 of the waste heat recovery heat exchanger, thereby realizing the control of preventing a large amount of heat exchange medium from flowing into the coke oven.
The balance valve is a principle for solving the change relation of flow pressure difference by utilizing a balance principle, and can be converted into a single-end pressure difference regulation type, such as a structure of a regulating valve and the like.
The upper and lower parts are general, and can be in the directions of upper, lower, left, right, front and back, and the like, and the principle of balance can also be a technical scheme of communicating basic principles of diaphragm type regulating valves and the like except for pistons.
In addition, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement modes should fall within the protection scope of the claims of the present invention.
Claims (5)
1. The utility model provides a raw coke oven gas waste heat recovery heat exchanger tedge is protected automatically to heat transfer medium flow which characterized in that: the waste heat recovery heat exchanger ascending pipe comprises a waste heat recovery heat exchanger ascending pipe (1), a heat exchange medium pipe is wound on the pipe wall of the waste heat recovery heat exchanger ascending pipe (1), the heat exchange medium pipe comprises a heat exchange medium inlet (2) and a heat exchange medium outlet (3), a heat exchange medium inlet balance valve (12) is connected and arranged at the position of the heat exchange medium inlet (2), the heat exchange medium inlet balance valve (12) comprises a balance valve piston type valve core (12-3), a balance valve inlet (12-1) and a balance valve outlet (12-2) are respectively arranged at two sides of the balance valve piston type valve core (12-3), the balance valve outlet (12-2) is connected with the heat exchange medium inlet (2), the balance valve inlet (12-1) is connected with an outer pipeline to be connected with a heat exchange medium, and the upper end of the balance valve piston type valve core (12-3) is connected with a third piston cavity (12-, and a raw gas outlet pressure guide pipe nozzle (12-12) is arranged on the third piston cavity (12-9), a raw gas outlet pressure guide port (10) is arranged at the position, close to the upper end, of the ascending pipe (1) of the waste heat recovery heat exchanger, and a raw gas outlet pressure guide pipe (11) is connected between the raw gas outlet pressure guide port (10) and the raw gas outlet pressure guide pipe nozzle (12-12).
2. The heat exchange medium flow automatic protection raw coke oven gas waste heat recovery heat exchanger riser of claim 1, characterized in that: the balance valve is characterized in that the lower end of a piston type valve core (12-3) of the balance valve is connected with a first piston cavity (12-5), a raw gas inlet pressure-leading pipe nozzle (12-7) is arranged on the first piston cavity (12-5), a raw gas inlet pressure-leading port (8) is arranged at a position close to the lower end of a heat recovery heat exchanger ascending pipe (1), and a raw gas inlet pressure-leading pipe (9) is connected between the raw gas inlet pressure-leading port (8) and the raw gas inlet pressure-leading pipe nozzle (12-7).
3. The heat exchange medium flow automatic protection raw coke oven gas waste heat recovery heat exchanger riser of claim 1, characterized in that: and a one-way valve (13) which is installed in the same direction as the heat exchange medium is arranged at the heat exchange medium outlet (3).
4. The heat exchange medium flow automatic protection raw coke oven gas waste heat recovery heat exchanger riser of claim 1, characterized in that: and a balance spring (12-10) is arranged in the third piston cavity (12-9).
5. The heat exchange medium flow automatic protection raw coke oven gas waste heat recovery heat exchanger riser of claim 1, characterized in that: the balance valve piston type valve core (12-3) is provided with a bell mouth with a large lower part and a small upper part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921620373.3U CN211570540U (en) | 2019-09-26 | 2019-09-26 | Heat exchange medium flow automatic protection raw coke oven gas waste heat recovery heat exchanger tedge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921620373.3U CN211570540U (en) | 2019-09-26 | 2019-09-26 | Heat exchange medium flow automatic protection raw coke oven gas waste heat recovery heat exchanger tedge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211570540U true CN211570540U (en) | 2020-09-25 |
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ID=72528464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921620373.3U Active CN211570540U (en) | 2019-09-26 | 2019-09-26 | Heat exchange medium flow automatic protection raw coke oven gas waste heat recovery heat exchanger tedge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211570540U (en) |
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2019
- 2019-09-26 CN CN201921620373.3U patent/CN211570540U/en active Active
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