CN210945482U - Ascending pipe of crude gas waste heat recovery heat exchanger - Google Patents
Ascending pipe of crude gas waste heat recovery heat exchanger Download PDFInfo
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- CN210945482U CN210945482U CN201921620375.2U CN201921620375U CN210945482U CN 210945482 U CN210945482 U CN 210945482U CN 201921620375 U CN201921620375 U CN 201921620375U CN 210945482 U CN210945482 U CN 210945482U
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- 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, it includes waste heat recovery heat exchanger tedge (1), around being put on waste heat recovery heat exchanger tedge (1) pipe wall there is 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 balance valve (12). The utility model discloses can adapt to raw coke oven gas output and fire drop curve change operating mode, through the constancy of the pressure differential control flow of waste heat recovery heat exchanger tedge heat transfer medium import, namely when the raw coke oven gas output is big, heat transfer volume is big, heat transfer medium import and export pressure differential can increase, can cause the heat transfer medium resistance to drop the increase, make the tedge flow produce the reduction trend, this balanced valve is exactly pressure differential unidirectional modulation, increase the entry area, reduce the resistance, the steady tedge flow is invariable; and vice versa.
Description
Technical Field
The utility model relates to a raw coke oven gas waste heat recovery heat exchanger tedge, 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.
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.
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 raw coke oven gas waste heat recovery heat exchanger tedge that flow distribution is balanced in the pipe and just in time cut off water (or other thermal working medium) in case leak water (or other thermal working medium) is provided to above-mentioned prior art.
The utility model provides a technical scheme that above-mentioned problem adopted does: a raw 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 receive heat exchange medium, the lower end of the balance valve piston type valve core is connected with a first piston cavity, a heat exchange medium inlet pressure-leading pipe nozzle is arranged on the first piston cavity, and the upper end of the balance valve piston type valve core is sequentially connected with a third piston cavity and a fourth piston cavity which are, the waste heat recovery heat exchanger ascending tube is provided with a raw gas outlet pressure leading port close to the upper end, 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 pipe nozzle, 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 pipe nozzle, and a raw gas outlet pressure leading pipe is connected between the raw gas outlet pressure leading port and the raw gas outlet pressure leading pipe nozzle.
Furthermore, a second piston cavity is arranged below the first piston cavity in series, a raw coke oven gas inlet pressure-leading pipe nozzle is arranged on the second 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:
1. the invention can adapt to the output of raw coke oven gas and the working condition of the change of a fire drop curve, and the constant or the requirement of the flow is reversely controlled by the pressure difference of the inlet and the outlet of the heat exchange medium of the ascending pipe 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 inlet and the outlet of the heat exchange medium is increased, so that the resistance drop of the heat exchange medium is increased, the flow of the heat exchange medium is increased, the trend of reducing the flow of the ascending pipe is caused, the balance valve is used for reversely adjusting the pressure difference, the area of the inlet is increased, the resistance; and vice versa;
2. the utility model discloses in the tedge operation in-process, in case the tedge heat exchanger became invalid and caused interior hourglass, can cause the interior raw coke oven gas passageway's of tedge pressure differential increase (or the interior gas passageway exit position pressure increase of tedge), the pressure differential or the pressure of increase can make this valve cut off the continuation inflow of tedge heat exchanger heat transfer medium, stop this tedge continuation operation, play the effect of protection coke oven.
Drawings
Fig. 1 is a schematic view of an embodiment 1 of a raw coke oven gas waste heat recovery heat exchanger riser of the present invention.
Fig. 2 is a schematic view of an embodiment 2 of the riser of the raw gas waste heat recovery heat exchanger 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
Heat exchange medium outlet pressure leading pipe 7
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
Pressure-leading pipe nozzle 12-4 of heat exchange medium inlet
First piston chamber 12-5
Second piston chamber 12-6
Crude gas inlet pressure-leading pipe nozzle 12-7
Heat exchange medium outlet pressure leading pipe nozzle 12-8
Third piston chamber 12-9
Balance spring 12-10
Fourth piston chamber 12-11
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, which comprises a waste heat recovery heat exchanger riser 1, 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 medium inlet 2 and a heat exchange medium outlet 3, a heat exchange medium inlet balance valve 12 is connected 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 external pipeline to be connected with a heat exchange medium, the lower end of the balance valve piston type valve core 12-3 is sequentially connected with a first piston cavity 12-5 and a second piston cavity 12-6 which are connected in series, the heat exchange medium inlet pressure guide pipe mouth 12-4 is arranged on the first piston cavity 12-5, the raw gas inlet pressure guide pipe mouth 12-7 is arranged on the second piston cavity 12-6, the upper end of the balance valve piston type valve core 12-3 is sequentially connected with a third piston cavity 12-9 and a fourth piston cavity 12-11 which are connected in series, a balance spring 12-10 is arranged in the third piston cavity 12-9, a heat exchange medium outlet pressure guide pipe mouth 12-8 is arranged on the third piston cavity 12-9, a raw gas outlet pressure guide pipe mouth 12-12 is arranged on the fourth piston cavity 12-11, the heat exchange medium inlet pressure guide mouth 4 and the heat exchange medium outlet pressure guide mouth 6 are respectively arranged at positions close to the heat exchange medium inlet 2 and the heat exchange medium outlet 3, and the waste heat recovery heat exchanger riser 1 is respectively provided with raw gas outlet pressure guide pipes at positions close to the upper end and the lower end A pressure port 10 and a raw gas inlet pressure port 8, wherein a heat exchange medium inlet pressure pipe 5 is connected between the heat exchange medium inlet pressure port 4 and the heat exchange medium inlet pressure pipe mouth 12-4, a heat exchange medium outlet pressure pipe 7 is connected between the heat exchange medium outlet pressure port 6 and the heat exchange medium outlet pressure pipe mouth 12-8, a raw gas outlet pressure pipe 11 is connected between the raw gas outlet pressure port 10 and the raw gas outlet pressure pipe mouth 12-12, and a raw gas inlet pressure pipe 9 is connected between the raw gas inlet pressure port 8 and the raw gas inlet pressure pipe mouth 12-7;
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 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 raw gas inlet pressure leading port 8 is connected to a raw gas inlet pressure leading pipe nozzle 12-7 on a second piston cavity 12-6 which is connected with the first piston cavity 12-5 in a one-way series manner by a raw gas inlet pressure leading pipe 9, and the pressure is P2 in the second piston cavity 12-6 communicated with the raw gas inlet pressure leading pipe nozzle; the pressure acting on the lower end face of the piston type valve core 12-3 of the balance valve is P1+ P2;
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 raw coke oven gas outlet pressure leading port 10 is connected to a raw coke oven gas outlet pressure leading pipe nozzle 12-12 on a fourth piston cavity 12-11 which is connected with a third piston cavity 12-9 in a one-way series manner by a raw coke oven gas outlet pressure leading pipe 11, and the pressure P4 is formed in the fourth piston cavity 12-11 communicated with the raw coke oven gas outlet pressure leading pipe nozzle (P4 is usually normal pressure or micro positive pressure under the normal operation condition); the pressure acting on the upper end face of the piston type valve core 12-3 of the balance valve is P3+ P4;
the opening of the piston hole when the P1+ P2 is P3+ P4 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 after the opening of the piston type valve core 12-3 of the balance valve is the initial set value, the operation of the riser 1 of the waste heat recovery heat exchanger can be realized.
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+ P2 is larger than P3+ P4, the piston type valve core 12-3 of the balance valve moves upwards, a bell mouth with a large lower part and a small upper part is formed in the piston type valve core 12-3 of the balance valve, the opening degree of the heat exchange medium inlet balance valve 12 is increased in a proportion mode when the piston type valve core 12-3 of the balance valve moves upwards, the flow of the heat exchange medium is increased, the heat exchange efficiency is maximized as the supply quantity of the heat exchange medium needs to be increased in the ascending pipe 1 of the waste heat recovery heat exchanger, and therefore the flow optimization control 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+ P2 is more than P3+ P4, the piston type valve core 12-3 of the balance valve moves downwards, a horn mouth with a large lower part and a small upper part is formed in the piston type valve core 12-3 of the balance valve, the opening degree of the heat exchange medium inlet balance valve 12 is reduced in a downward moving proportion mode by the piston type valve core 12-3 of the balance valve, the flow of the heat exchange medium is reduced, at the moment, the supply quantity of the heat exchange medium needs to be reduced by the ascending pipe 1 of the waste heat recovery heat exchanger to achieve maximization of heat exchange efficiency, and therefore optimized control of the flow of the heat exchange medium is achieved.
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 P2 and P4 is rapidly increased, P1+ P2 < P3+ P4, the piston type valve core 12-3 of the balance valve rapidly moves downwards to a dead point and cannot be recovered, 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.
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, which comprises a waste heat recovery heat exchanger riser 1, 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 medium inlet 2 and a heat exchange medium outlet 3, a heat exchange medium inlet balance valve 12 is connected 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, 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 guide pipe mouth 12-4 is arranged on the first piston cavity 12-5, a third piston cavity 12-9 and a fourth piston cavity 12-11 which are connected in series are sequentially connected at the upper end of the piston type valve core 12-3 of the balance valve, a balance spring 12-10 is arranged in the third piston cavity 12-9, a heat exchange medium outlet pressure guide pipe mouth 12-8 is arranged on the third piston cavity 12-9, a crude gas outlet pressure guide pipe mouth 12-12 is arranged on the fourth piston cavity 12-11, 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 crude gas outlet pressure guide port 10 is arranged at the position of the waste heat recovery heat exchanger riser 1 close to the upper end, a heat exchange medium inlet pressure pipe 5 is connected between the heat exchange medium inlet pressure port 4 and the heat exchange medium inlet pressure pipe mouth 12-4, a heat exchange medium outlet pressure pipe 7 is connected between the heat exchange medium outlet pressure port 6 and the heat exchange medium outlet pressure pipe mouth 12-8, and a raw gas outlet pressure pipe 11 is connected between the raw gas outlet pressure port 10 and the raw gas outlet pressure 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 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; the pressure acting on the lower end face of the piston type valve core 12-3 of the balance valve is P1;
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 raw coke oven gas outlet pressure leading port 10 is connected to a raw coke oven gas outlet pressure leading pipe nozzle 12-12 on a fourth piston cavity 12-11 which is connected with a third piston cavity 12-9 in a one-way series manner by a raw coke oven gas outlet pressure leading pipe 11, and the pressure P4 is formed in the fourth piston cavity 12-11 communicated with the raw coke oven gas outlet pressure leading pipe nozzle (P4 is usually normal pressure or micro positive pressure under the normal operation condition); the pressure acting on the upper end face of the piston type valve core 12-3 of the balance valve is P3+ P4;
the opening of the piston hole when the P1 is equal to P3+ P4 is the same as the set value, that is, the initial flow is set to a proper proportion value of the water supply flow and the evaporation amount meeting the heat exchange requirement of the riser 1 of the waste heat recovery heat exchanger, and after the opening of the piston type valve core 12-3 of the balance valve is the initial set value, the operation of the riser 1 of the waste heat recovery heat exchanger can be realized.
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 more than P3+ P4, the piston type valve core 12-3 of the balance valve moves upwards, the piston type valve core 12-3 of the balance valve is provided with a bell mouth with a big bottom and a small top, the piston type valve core 12-3 of the balance valve moves upwards to increase the opening degree of the heat exchange medium inlet balance valve 12 in a proportional mode, the flow of the heat exchange medium is increased, the supply quantity of the heat exchange medium needs to be increased to achieve the maximization of heat exchange efficiency in the ascending pipe 1 of the waste heat recovery heat exchanger, and therefore the flow optimization control 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 more than P3+ P4, the piston type valve core 12-3 of the balance valve moves downwards, a bell mouth with a large lower part and a small 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 to reduce the opening degree of the heat exchange medium inlet balance valve 12 in a proportional mode, 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 maximization of heat exchange efficiency of the waste heat recovery heat exchanger ascending pipe 1, and therefore optimization control of the flow of the heat exchange medium is achieved.
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 of P4 is rapidly increased, P1 is less than P3+ P4, 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.
The upper and lower parts in the above contents are all general fingers, 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 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 heat exchange medium inlet pressure guide pipe mouth (12-4) is arranged on the first piston cavity (12-5), a third piston cavity (12-9) and a fourth piston cavity (12-11) which are connected in series are sequentially connected at the upper end of the piston type valve core (12-3) of the balance valve, a heat exchange medium outlet pressure guide pipe mouth (12-8) is arranged on the third piston cavity (12-9), a raw coal gas outlet pressure guide pipe mouth (12-12) is arranged on the fourth piston cavity (12-11), a heat exchange medium inlet pressure guide port (4) and a heat exchange medium outlet pressure guide port (6) are respectively arranged on the heat exchange medium pipe at positions close to the heat exchange medium inlet (2) and the heat exchange medium outlet (3), a raw coal gas outlet pressure guide port (10) is arranged on the waste heat recovery heat exchanger riser (1) at a position close to the upper end, a heat exchange medium inlet pressure pipe (5) is connected between the heat exchange medium inlet pressure port (4) and the heat exchange medium inlet pressure pipe nozzles (12-4), a heat exchange medium outlet pressure pipe (7) is connected between the heat exchange medium outlet pressure port (6) and the heat exchange medium outlet pressure pipe nozzles (12-8), and a raw gas outlet pressure pipe (11) is connected between the raw gas outlet pressure port (10) and the raw gas outlet pressure pipe nozzles (12-12).
2. The raw coke oven gas waste heat recovery heat exchanger riser of claim 1, wherein: a second piston cavity (12-6) is arranged below the first piston cavity (12-5) in series, a raw gas inlet pressure-leading pipe nozzle (12-7) is arranged on the second piston cavity (12-6), a raw gas inlet pressure-leading port (8) is arranged at a position close to the lower end of the waste 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 raw coke oven gas waste heat recovery heat exchanger riser of claim 1, wherein: 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 raw coke oven gas waste heat recovery heat exchanger riser of claim 1, wherein: and a balance spring (12-10) is arranged in the third piston cavity (12-9).
5. The raw coke oven gas waste heat recovery heat exchanger riser of claim 1, wherein: 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 |
|---|---|---|---|
| CN201921620375.2U CN210945482U (en) | 2019-09-26 | 2019-09-26 | Ascending pipe of crude gas waste heat recovery heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921620375.2U CN210945482U (en) | 2019-09-26 | 2019-09-26 | Ascending pipe of crude gas waste heat recovery heat exchanger |
Publications (1)
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| CN110511770A (en) * | 2019-09-26 | 2019-11-29 | 葛霖 | A kind of raw coke oven gas heat recovery heat exchanger tedge and its control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110511770A (en) * | 2019-09-26 | 2019-11-29 | 葛霖 | A kind of raw coke oven gas heat recovery heat exchanger tedge and its control method |
| CN110511770B (en) * | 2019-09-26 | 2023-12-12 | 葛霖 | Raw gas waste heat recovery heat exchanger riser and control method thereof |
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