CN110551509A - heat exchange medium flow self-balancing crude gas waste heat recovery heat exchanger riser - Google Patents
heat exchange medium flow self-balancing crude gas waste heat recovery heat exchanger riser Download PDFInfo
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- CN110551509A CN110551509A CN201910916610.9A CN201910916610A CN110551509A CN 110551509 A CN110551509 A CN 110551509A CN 201910916610 A CN201910916610 A CN 201910916610A CN 110551509 A CN110551509 A CN 110551509A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B27/00—Arrangements for withdrawal of the distillation gases
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B41/00—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke
- C10B41/08—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke for the withdrawal of the distillation gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a heat exchange medium flow self-balancing crude gas waste heat recovery heat exchanger riser, which comprises a waste heat recovery heat exchanger riser (1), wherein a heat exchange medium pipe is wound on the pipe wall of the waste heat recovery heat exchanger riser (1), the heat exchange medium pipe comprises a heat exchange cold medium inlet (2) and a heat exchange cold medium outlet (3), and a heat exchange cold medium inlet balance valve (12) is arranged at the heat exchange cold medium inlet (2). The invention can adapt to the output of raw coke oven gas and the change working condition of a fire drop curve, the flow is controlled to be constant by the pressure difference of the heat exchange medium inlet of the riser of the waste heat recovery heat exchanger, namely when the output of raw coke oven gas is large and the heat exchange amount is large, the pressure difference of the heat exchange medium inlet and outlet can be increased, the resistance drop of the heat exchange medium can be increased, the flow of the riser is reduced, the balance valve is used for adjusting the pressure difference in a one-way, the area of the inlet is increased, the resistance is reduced, and the flow of the riser is stabilized to; and vice versa.
Description
Technical Field
The invention relates to a heat exchange medium flow self-balancing crude gas waste heat recovery heat exchanger riser, which is mainly used for recovering crude gas waste heat of a coke oven and belongs to the technical field of heat exchangers.
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.
At present, a method that outlet pipelines of an ascending pipe of a serial-parallel waste heat recovery heat exchanger are mostly adopted as a group according to a production serial sequence and then are connected in parallel to an outlet header pipe is adopted; the technical scheme that outlet pipelines of the ascending pipes of the serial-parallel waste heat recovery heat exchangers are used as a group and are adjusted by adjusting valves according to the production serial order is also adopted; and the inlet and the outlet of the riser of the waste heat recovery heat exchanger are additionally provided with pore plates for flow limiting, so that the water (or other hot working mediums) stabilizing effect of the heat exchange medium is formed.
The parallel connection method adopted according to the production series does not substantially solve the problem of water (or other hot working mediums) bias flow of the heat exchange medium; the scheme of the regulating valve has the actual situation of unorganized flame which cannot be used on site, namely the regulating valve is not allowed to be added and used under the actual working condition; the adoption of the orifice plate for flow limitation does not substantially solve the problem of water (or other hot working mediums) bias flow of the heat exchange medium.
Disclosure of Invention
The invention aims to solve the technical problem of providing a heat exchange medium flow self-balancing raw coke oven gas waste heat recovery heat exchanger riser which has the flow in the tube not changed under the influence of the pressure (change of vaporization amount) in the tube in the prior art.
The technical scheme adopted by the invention for solving the problems is as follows: a heat exchange medium flow self-balancing crude gas waste heat recovery heat exchanger riser 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 heat exchange medium, a first piston cavity is connected to the lower end of the balance valve piston type valve core, and a heat exchange medium inlet pressure-inducing pipe nozzle is arranged on the first piston cavity, the balance valve is characterized in that a third piston cavity is connected to the upper end of the piston type valve core of the balance valve, a heat exchange medium outlet pressure-leading nozzle is arranged on the third piston cavity, a heat exchange medium inlet pressure-leading port and a heat exchange medium outlet pressure-leading port are respectively arranged at positions, close to a heat exchange medium inlet and a heat exchange medium outlet, of the heat exchange medium pipe, a heat exchange medium inlet pressure-leading pipe is connected between the heat exchange medium inlet pressure-leading port and the heat exchange medium inlet pressure-leading nozzle, and a heat exchange medium outlet pressure-leading pipe is connected between the heat exchange medium outlet pressure-leading port and the heat exchange medium outlet pressure-leading.
furthermore, a one-way valve installed in the same direction as the heat exchange medium is arranged at the heat exchange cold 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.
A control method for a heat exchange medium flow self-balancing raw coke oven gas waste heat recovery heat exchanger ascending pipe comprises the following steps:
Setting an initial flow, connecting a heat exchange medium inlet pressure guide port to a heat exchange medium inlet pressure guide nozzle connected to a first piston cavity by a heat exchange medium inlet pressure guide pipe, and forming a pressure P1 in the communicated first piston cavity;
the heat exchange medium outlet pressure leading port is connected with a heat exchange medium outlet pressure leading nozzle on a third piston cavity by adopting a heat exchange medium outlet pressure leading pipe, a balance spring is arranged in the third piston cavity, and the sum of the heat exchange medium outlet pressure and the pressure of the balance spring is P3; the pressure acting on the upper end surface of the piston type valve core 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 amount meeting the heat exchange requirement of the ascending pipe of the waste heat recovery heat exchanger, and the operation of the ascending pipe of the waste heat recovery heat exchanger can be realized after the opening of the piston type valve core of the balance valve is the initial set value;
When the output of raw coke oven gas changes and the change of the heat exchange evaporation capacity of the ascending pipe of the waste heat recovery heat exchanger is increased based on heat increase in the operation process of the coke oven, the pressure formed in the ascending pipe of the waste heat recovery heat exchanger changes to cause the pressure imbalance of the heat exchange cold medium inlet and the heat exchange cold medium outlet in pressure cavities at two ends of a piston type valve core of a balance valve, so that P1 is greater than P3, at the moment, the piston type valve core of the balance valve moves upwards, the upward movement of the piston type valve core of the balance valve increases the opening of the balance valve of the heat exchange medium inlet in a proportional mode, the flow of a heat exchange medium is increased, at the moment, the supply quantity of the heat exchange medium needs to be increased for realizing;
On the contrary, when the output of the raw coke oven gas changes and the heat exchange evaporation capacity of the ascending pipe of the waste heat recovery heat exchanger changes and is reduced based on heat reduction in the operation process of the coke oven, the pressure formed in the ascending pipe of the waste heat recovery heat exchanger changes to cause the pressure unbalance of the heat exchange cold medium inlet and the heat exchange cold medium outlet in the pressure cavities at the two ends of the piston type valve core of the balance valve, so that the pressure is P1 < P3, the piston type valve core of the balance valve moves downwards, the downward movement of the piston type valve core of the balance valve reduces the opening of the balance valve of the heat exchange medium inlet in a proportional mode, the flow of the heat exchange medium is reduced, at the moment, the ascending pipe of the waste heat recovery heat exchanger needs to reduce the supply.
compared with the prior art, the invention has the advantages that:
The heat exchange medium flow self-balancing raw coke oven gas waste heat recovery heat exchanger riser can adapt to the raw coke oven gas output and the fire drop curve change working condition, the flow is controlled to be constant or required in a reverse mode through the pressure difference of the heat exchange medium inlet of the heat exchange medium riser of the heat recovery heat exchanger, namely when the raw coke oven gas output is large and the heat exchange amount is large, the pressure difference of the heat exchange medium inlet and outlet can be increased, the resistance drop of the heat exchange medium can be increased, the flow of the riser is reduced, the balance valve is used for adjusting the pressure difference in a reverse mode, the inlet area is increased, the resistance is reduced, the flow of the riser is stabilized to be constant or the flow of the riser is increased, and the; and vice versa.
Drawings
FIG. 1 is a schematic diagram of a heat transfer medium flow self-balancing raw coke oven gas waste heat recovery heat exchanger riser pipe of the present invention.
Wherein:
Ascending pipe 1 of waste heat recovery heat exchanger
Heat exchange medium inlet 2
Heat exchange medium outlet 3
Heat exchange medium inlet pressure leading port 4
Heat exchange medium inlet pressure leading pipe 5
Pressure leading port 6 of heat exchange medium outlet
heat exchange medium outlet pressure leading pipe 7
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
Pressure-leading pipe nozzle 12-4 of heat exchange medium inlet
First piston chamber 12-5
Heat exchange medium outlet pressure leading pipe nozzle 12-8
Third piston chamber 12-9
balance spring 12-10
a one-way valve 13.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
Referring to fig. 1, the invention relates to a heat exchange medium flow self-balancing raw coke oven gas waste heat recovery heat exchanger riser, which comprises a waste heat recovery heat exchanger riser 1, 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 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, and the balance valve inlet 12-1 is connected with an outer pipeline to be connected with a heat exchange medium, the balance valve piston type valve core 12-3 is characterized in that the lower end of the balance valve piston type valve core 12-3 is connected with a first piston cavity 12-5, a heat exchange medium inlet pressure leading pipe orifice 12-4 is arranged on the first piston cavity 12-5, the upper end of the balance valve piston type valve core 12-3 is connected with a third piston cavity 12-9, a balance spring 12-10 is arranged in the third piston cavity 12-9, a heat exchange medium outlet pressure leading pipe orifice 12-8 is arranged on the third piston cavity 12-9, a heat exchange medium inlet pressure leading orifice 4 and a heat exchange medium outlet pressure leading orifice 6 are respectively arranged at positions close to a heat exchange medium inlet 2 and a heat exchange medium outlet 3 of the heat exchange medium pipe, a heat exchange medium inlet pressure leading pipe 5 is connected between the heat exchange medium inlet pressure leading orifice 4 and the heat exchange medium inlet pressure leading pipe orifice 12-4, a heat exchange medium outlet pressure leading pipe orifice 6 and the heat exchange medium outlet pressure leading pipe A pressure guiding pipe 7 at the outlet of the heat medium;
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;
The essence of binary automatic protection of the ascension pipe of the raw coke oven gas waste heat recovery heat exchanger is that the heat exchange medium inlet balance valve 12 is used for regulating and protecting, and the regulating and protecting principle is that the heat exchange medium inlet balance valve 12 regulates and controls the flow of the heat exchange medium of the ascension pipe 1 of the raw coke oven gas waste heat recovery heat exchanger, and the specific control method is as follows:
Setting an initial flow, connecting a heat exchange medium inlet pressure guide port 4 to a heat exchange medium inlet pressure guide nozzle 12-4 connected to a first piston cavity 12-5 by a heat exchange medium inlet pressure guide pipe 5, and forming pressure P1 in the first piston cavity 12-5 communicated with the heat exchange medium inlet pressure guide nozzle;
a heat exchange medium outlet pressure leading port 6 is connected to a heat exchange medium outlet pressure leading nozzle 12-8 on a third piston cavity 12-9 by a heat exchange medium outlet pressure leading pipe 7, a balance spring 12-10 is arranged in the third piston cavity 12-9, and the sum of the heat exchange medium 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 output of the raw coke oven gas is changed and the change of the heat exchange evaporation capacity of the riser 1 of the waste heat recovery heat exchanger is increased in the running process of the coke oven based on the increase of heat, the pressure formed in the ascending pipe 1 of the waste heat recovery heat exchanger can be changed, so that the pressure of the heat exchange cold medium inlet 2 and the heat exchange cold medium outlet 3 in the pressure cavities at the two ends of the piston type valve core 12-3 of the balance valve is unbalanced, p1 is larger than P3, the balance valve piston type valve core 12-3 moves upwards, a bell mouth with a large lower part and a small upper part is formed in the balance valve piston type valve core 12-3, the balance valve piston type valve core 12-3 moves upwards to increase the opening of the heat exchange medium inlet balance valve 12 in a proportional mode, the flow of the heat exchange medium is increased, the supply amount of the heat exchange medium needs to be increased in the waste heat recovery heat exchanger ascending pipe 1 to achieve maximization of heat exchange efficiency, and therefore the optimized control of the flow of the heat exchange medium is achieved;
On the contrary, when the output of the raw coke oven gas is changed and the change of the heat exchange evaporation capacity of the riser 1 of the waste heat recovery heat exchanger is reduced in the operation process of the coke oven and the heat is reduced, the pressure formed in the ascending pipe 1 of the waste heat recovery heat exchanger can be changed, so that the pressure of the heat exchange cold medium inlet 2 and the heat exchange cold medium outlet 3 in the pressure cavities at the two ends of the piston type valve core 12-3 of the balance valve is unbalanced, p1 is less than P3, the piston type valve core 12-3 of the balance valve moves downwards, the bell mouth with the larger lower part and the smaller upper part is formed in the piston type valve core 12-3 of the balance valve, the piston type valve core 12-3 of the balance valve moves downwards in a proportional mode, the opening degree of the heat exchange medium inlet balance valve 12 is reduced, the flow of the heat exchange medium is reduced, at the moment, the supply quantity of the heat exchange medium needs to be reduced for achieving the maximization of the heat exchange efficiency of the waste heat recovery heat exchanger, and therefore the flow optimization control of the heat exchange medium is achieved.
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 any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.
Claims (5)
1. the utility model provides a heat transfer medium flow self-balancing raw coke oven gas waste heat recovery heat exchanger tedge 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 a first piston cavity (12-5) is connected to the lower end of the balance valve piston type valve, a pressure guide nozzle (12-4) of a heat exchange medium inlet 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), a pressure guide nozzle (12-8) of a heat exchange medium outlet is arranged on the third piston cavity (12-9), a heat exchange medium inlet pressure guide port (4) and a heat exchange medium outlet pressure guide port (6) are respectively arranged at the positions of the heat exchange medium pipe close to the heat exchange medium inlet (2) and the heat exchange medium outlet (3), a heat exchange medium inlet pressure guide pipe (5) is connected between the heat exchange medium inlet pressure guide port (4) and the heat exchange medium inlet pressure guide pipe nozzle (12-4), a heat exchange medium outlet pressure-leading pipe (7) is connected between the heat exchange medium outlet pressure-leading port (6) and the heat exchange medium outlet pressure-leading nozzles (12-8).
2. The heat exchange medium flow self-balancing 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 cold medium outlet (3).
3. The heat exchange medium flow self-balancing 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).
4. the heat exchange medium flow self-balancing 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.
5. A control method for a heat exchange medium flow self-balancing raw coke oven gas waste heat recovery heat exchanger ascending pipe is characterized by comprising the following steps:
Setting an initial flow, connecting a heat exchange medium inlet pressure guide port to a heat exchange medium inlet pressure guide nozzle connected to a first piston cavity by a heat exchange medium inlet pressure guide pipe, and forming a pressure P1 in the communicated first piston cavity;
The heat exchange medium outlet pressure leading port is connected with a heat exchange medium outlet pressure leading nozzle on a third piston cavity by adopting a heat exchange medium outlet pressure leading pipe, a balance spring is arranged in the third piston cavity, and the sum of the heat exchange medium outlet pressure and the pressure of the balance spring is P3; the pressure acting on the upper end surface of the piston type valve core 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 amount meeting the heat exchange requirement of the ascending pipe of the waste heat recovery heat exchanger, and the operation of the ascending pipe of the waste heat recovery heat exchanger can be realized after the opening of the piston type valve core of the balance valve is the initial set value;
When the output of raw coke oven gas changes and the change of the heat exchange evaporation capacity of the ascending pipe of the waste heat recovery heat exchanger is increased based on heat increase in the operation process of the coke oven, the pressure formed in the ascending pipe of the waste heat recovery heat exchanger changes to cause the pressure imbalance of the heat exchange cold medium inlet and the heat exchange cold medium outlet in pressure cavities at two ends of a piston type valve core of a balance valve, so that P1 is greater than P3, at the moment, the piston type valve core of the balance valve moves upwards, the upward movement of the piston type valve core of the balance valve increases the opening of the balance valve of the heat exchange medium inlet in a proportional mode, the flow of a heat exchange medium is increased, at the moment, the supply quantity of the heat exchange medium needs to be increased for realizing;
On the contrary, when the output of the raw coke oven gas changes and the heat exchange evaporation capacity of the ascending pipe of the waste heat recovery heat exchanger changes and is reduced based on heat reduction in the operation process of the coke oven, the pressure formed in the ascending pipe of the waste heat recovery heat exchanger changes to cause the pressure unbalance of the heat exchange cold medium inlet and the heat exchange cold medium outlet in the pressure cavities at the two ends of the piston type valve core of the balance valve, so that the pressure is P1 < P3, the piston type valve core of the balance valve moves downwards, the downward movement of the piston type valve core of the balance valve reduces the opening of the balance valve of the heat exchange medium inlet in a proportional mode, the flow of the heat exchange medium is reduced, at the moment, the ascending pipe of the waste heat recovery heat exchanger needs to reduce the supply.
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| CN201910916610.9A CN110551509A (en) | 2019-09-26 | 2019-09-26 | heat exchange medium flow self-balancing crude gas waste heat recovery heat exchanger riser |
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| CN201910916610.9A CN110551509A (en) | 2019-09-26 | 2019-09-26 | heat exchange medium flow self-balancing crude gas waste heat recovery heat exchanger riser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111637779A (en) * | 2020-06-09 | 2020-09-08 | 武汉轻工大学 | Coke oven raw gas sensible heat recovery device |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111637779A (en) * | 2020-06-09 | 2020-09-08 | 武汉轻工大学 | Coke oven raw gas sensible heat recovery device |
| CN111637779B (en) * | 2020-06-09 | 2021-11-26 | 武汉轻工大学 | Coke oven raw gas sensible heat recovery device |
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