JP4495395B2 - Steam boiler equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a boiler device.
[0002]
[Prior art]
As a steam boiler device, a steam boiler that heats feed water to generate steam, a load device that uses the steam generated in the steam boiler, and a steam pipe for supplying the steam generated in the steam boiler to the load device And a condensate pipe for collecting condensate obtained by condensing steam used in the load device and mixing it with feed water to the steam boiler is known. Since such a steam boiler device can be reused as feed water to the steam boiler while circulating the steam supplied to the load device as condensate, the amount of makeup water can be reduced, and economical operation Is possible.
[0003]
By the way, since the said steam piping and the said condensate piping used with the said steam boiler apparatus are mainly made from a steel pipe, it may be forced to replace | exchange because of corrosion. It is understood that the corrosion of the steam pipe and the condensate pipe is mainly caused by the influence of bicarbonate ions and dissolved oxygen contained in the water supply to the steam boiler. Corrosion caused by bicarbonate ions occurs when carbon dioxide gas generated by thermal decomposition of feed water containing bicarbonate ions in the steam boiler lowers the pH of steam and condensate, and comes into contact with condensate. Since it progresses evenly to the inner surface portion of the pipe, which leads to thinning of the pipe, the traveling speed is relatively slow. On the other hand, the corrosion caused by dissolved oxygen is a partially concentrated corrosion action of the oxygen dissolved in the steam or condensate on the lower part where sludge is accumulated, such as the lower part of the pipe, especially the horizontal pipe. It has a characteristic that the rate of progress is relatively fast and fatal damage is caused to the condensate pipe in a short time because it causes pore-like corrosion (pitting corrosion) from the inside to the outside of the pipe. Have.
[0004]
For this reason, in the steam boiler apparatus, a neutralizing agent for neutralizing carbon dioxide in steam or condensate, and a film formation for forming an anticorrosive film on the inner surface of the steam pipe or the condensate pipe An operation method for injecting a chemical (such as a corrosion inhibitor) into the feed water to the steam boiler has been implemented. Among the corrosion inhibitors injected into the feed water in this way, the neutralizing agent neutralizes the carbon dioxide gas generated in the steam boiler and suppresses the pH drop of steam and condensate. It is possible to effectively suppress the thinning corrosion. On the other hand, since the film forming agent is supplied into the steam pipe together with the steam, an anticorrosive film is formed on the inner surface of the steam pipe or the condensate pipe, and the above-mentioned due to dissolved oxygen. It is possible to effectively suppress pitting corrosion and thinning corrosion caused by carbon dioxide gas.
[0005]
However, in the steam boiler apparatus, the feed water supplied to the steam boiler is heated there to become steam, and part of the feed water remains in the steam boiler as boiler water, so that the corrosion suppression injected into the feed water is suppressed. The agent will also be distributed between steam and boiler water. Therefore, a part of the corrosion inhibitor injected into the feed water remains in the boiler water and does not contribute to the corrosion suppression of the steam pipe and the condensate pipe. Therefore, the corrosion inhibitor suppresses the corrosion in the boiler water. In consideration of the residual amount of the agent, it is necessary to set the injection amount into the feed water excessively.
[0006]
In addition, corrosion inhibitors injected into water supply, especially film-forming agents, may also form a film on the water level detector for controlling the water level in the steam boiler, thus hindering smooth water level control. As a result, the operation of the steam boiler apparatus may become unstable.
[0007]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to use a corrosion inhibitor for suppressing the corrosion of the steam piping and condensate piping of the steam boiler device without waste, and to operate the steam boiler device stably.
[0008]
[Means for Solving the Problems]
This invention was made in order to solve the said subject, The invention of Claim 1 heated the feed water, the steam boiler which generate | occur | produces steam, the load apparatus using steam, and steam Steam piping for supplying to the load device, condensate piping for collecting condensate obtained by condensing steam used in the load device and mixing it with feed water, the steam piping and the condensate An injection part for injecting a corrosion inhibitor composed of a required amount of morpholine fatty acid salt into either one or both of the pipes, the injection part according to the amount of steam generated in the steam boiler It is characterized by being set to be adjustable.
[0009]
The invention according to claim 2 is a steam boiler that generates steam by heating feed water, a plurality of load devices that use steam, a plurality of steam pipes for supplying steam to each of the load devices, A plurality of condensate pipes for collecting condensate obtained by condensing steam used in each load device and mixing it with feed water, and steam from each steam boiler for each load device A steam distributor for distributing to a pipe, and an injection section for injecting a required amount of a morpholine fatty acid salt corrosion inhibitor into one or both of the steam pipe and the condensate pipe, The injection section is set so that the required amount can be adjusted according to the amount of steam generated in the steam boiler.
[0010]
Invention of Claim 3 is set so that the said injection | pouring part can inject | pour the corrosion inhibitor which consists of a morpholine fatty acid salt to either one or both of the said steam distribution part and each said condensate piping. It is said.
[0011]
The invention according to claim 4 is a plurality of steam boilers for heating the feed water to generate steam, a load device using steam, a steam concentrating unit for collecting steam from each steam boiler, A steam pipe for supplying the steam collected in the steam concentrating section to the load device, and a condensate pipe for collecting the condensate obtained by condensing the steam used in the load device and mixing it with the feed water And an injection part for injecting a corrosion inhibitor composed of a required amount of morpholine fatty acid salt into one or both of the steam pipe and the condensate pipe, and the injection parts are respectively in the steam boilers. The required amount is set to be adjustable according to the total amount of steam generated.
[0012]
The invention according to claim 5 is a plurality of steam boilers that generate steam by heating feed water, a plurality of load devices that use steam, and a steam concentrating unit for collecting steam from each of the steam boilers A plurality of steam pipes for supplying the steam collected in the steam concentrating portion to the load devices, and collecting condensate obtained by condensing the steam used in the load devices to supply water A plurality of condensate pipes for mixing, and an injection part for injecting a required amount of a morpholine fatty acid salt into one or both of the steam pipes and the condensate pipes, and The said injection | pouring part is set so that the said required amount can be adjusted according to the total amount of the vapor | steam each generate | occur | produced in each said steam boiler, It is characterized by the above-mentioned.
[0013]
Furthermore, the invention according to claim 6 is configured such that the injection section is configured to be able to inject a corrosion inhibitor made of a morpholine fatty acid salt into one or both of the steam concentrating section and each condensate pipe. It is characterized by.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, a steam boiler apparatus according to an embodiment of the present invention will be described with reference to FIG. In FIG. 1, a steam boiler apparatus 1 mainly includes a water supply device 2, a steam boiler 3, a load device 4, a steam pipe 5, a condensate pipe 6, and an injection device 7 (an example of an injection unit).
[0015]
The water supply device 2 is for supplying water to the steam boiler 3, and is supplied in the water supply passage 8 for makeup water, the water supply tank 9 for storing makeup water from the water injection passage 8, and the water supply tank 9. A water supply path 10 for supplying the supplied water to the steam boiler 3 is mainly provided. This water supply path 10 has a water supply pump 11 for sending out the water supply stored in the water supply tank 9 toward the steam boiler 3.
[0016]
The steam boiler 3 is for generating steam by heating the feed water supplied from the water supply device 2, and includes a heating burner 12 and an operation control device 13 for heating the feed water. The operation control device 13 is for setting the combustion amount in the steam boiler 3, for example, a three-position control system, more specifically, the heating burner 12 is stopped, and low combustion and high combustion are performed. It can be set to one of three positions. Here, the amount of steam generated in the steam boiler 3 corresponds to the amount of combustion set by the operation control device 13. For example, when the combustion amount set by the operation control device 13 is “high combustion”, assuming that the amount of steam generated in the steam boiler 3 is “10”, when “low combustion” is set, It is ½ of high combustion (ie, “5”), and becomes “0” when set to “stop”.
[0017]
A water level detector 14 is disposed in the steam boiler 3. The water level detector 14 is set so that a water level signal can be transmitted to the feed water pump 11, and the feed water pump 11 maintains a constant water level in the steam boiler 3 based on the water level signal. On / off control is performed.
[0018]
The load device 4 is a heat exchanger for performing required heat exchange using, for example, steam generated in the steam boiler 3. The steam pipe 5 extends from the steam boiler 3 and supplies steam from the steam boiler 3 to the load device 4. The condensate pipe 6 extends from the load device 4 to the water supply tank 9, and collects condensed water (condensate) obtained by condensing steam used in the load device 4 to the water supply tank 9. Is for. Here, the condensate pipe 6 has a steam trap 15.
[0019]
The injection device 7 includes a chemical tank 16 for storing a corrosion inhibitor made of morpholine fatty acid salt, and a chemical injection pipe 17 that connects the chemical tank 16 and the vapor pipe 5. The chemical injection pipe 17 has a chemical injection pump 18 for supplying a corrosion inhibitor made of morpholine fatty acid salt in the chemical tank 16 into the steam pipe 5. The chemical injection pump 18 is connected to the operation control device 13, and according to the combustion amount set in the operation control device 13, that is, according to the amount of steam generated in the steam boiler 3. The necessary amount of the corrosion inhibitor made of morpholine fatty acid salt to be supplied into the steam pipe 5 is set to be adjustable. More specifically, when the combustion amount set in the operation control device 13 is “high combustion” (that is, the amount of steam generated in the steam boiler 3 is, for example, the above-mentioned “10” In the case of "", the required amount of the corrosion inhibitor made of morpholine fatty acid salt supplied to the steam pipe 5 is set to a predetermined unit amount (hereinafter referred to as "unit amount"), for example. Further, when the combustion amount set in the operation control device 13 is “low combustion” (that is, when the amount of steam generated in the steam boiler 3 is “5”, for example), to the steam pipe 5 The required amount of the corrosion inhibitor composed of the morpholine fatty acid salt to be supplied is set to half the unit amount (hereinafter referred to as “half unit amount”). Further, when the combustion amount set in the operation control device 13 is “stopped” (that is, when the amount of steam generated in the steam boiler 3 is “0”), the steam pipe 5 is made of morpholine fatty acid salt. Stop supplying corrosion inhibitors.
[0020]
Now, the morpholine fatty acid salt injected to suppress the corrosion of the steam pipe 5 and the condensate pipe 6 is decomposed into morpholine and fatty acid by heat, and the morpholine acts as a neutralized anticorrosive. Since the fatty acid acts as a film-type anticorrosive agent, it is a corrosion inhibitor having both functions of neutralization and film action. Here, examples of the fatty acid of the morpholine fatty acid salt include saturated fatty acids such as lauric acid, myristic acid, palmitic acid and stearic acid, and unsaturated fatty acids such as oleic acid, linoleic acid and linolenic acid.
[0021]
Here, the various members constituting the steam boiler device 1, in particular, the steam pipe 5 and the condensate pipe 6 are mainly formed of steel pipes.
[0022]
Next, the operation of the steam boiler apparatus 1 will be described. When operating the steam boiler device 1, makeup water is supplied from the water injection path 8 to the water supply tank 9, and the makeup water is stored in the water supply tank 9. Then, the water supply pump 11 is operated, and the water supply stored in the water supply tank 9 is supplied to the steam boiler 3 through the water supply passage 10. The steam boiler 3 heats feed water by the heating burner 12 to generate steam. The generated steam is supplied to the load device 4 through the steam pipe 5. The steam that has passed through the load device 4 loses its latent heat and partly changes to condensed water, and the steam and water are separated in the steam trap 15 to become condensed water (drain water). This condensate is collected into the water supply tank 9 through the condensate pipe 6, where it is mixed with makeup water from the water injection path 8 and reused as water supply to the steam boiler 3.
[0023]
During the operation of the steam boiler device 1, the operation control device 13 transmits the combustion amount of the steam boiler 3 to the chemical injection pump 18. And the said chemical injection pump 18 operate | moves based on the combustion amount information transmitted from the said operation control apparatus 13, From the required amount of morpholine fatty acid salts corresponding to the combustion amount, ie, the steam amount generated in the said steam boiler 3, The corrosion inhibitor is supplied from the chemical tank 16 through the chemical injection pipe 17 into the steam pipe 5. Specifically, the chemical injection pump 18 supplies a corrosion inhibitor composed of the unit amount of morpholine fatty acid salt when the combustion amount of the steam boiler 3 is “high combustion”. When the combustion amount is “low combustion”, a corrosion inhibitor composed of the morpholine fatty acid salt in the half unit amount is supplied. Further, when the combustion amount of the steam boiler 3 is “stopped”, the supply of the corrosion inhibitor made of morpholine fatty acid salt is stopped.
[0024]
The corrosion inhibitor made of morpholine fatty acid salt supplied to the steam pipe 5 as described above is dispersed in the steam moving toward the load device 4 in the steam pipe 5. The corrosion inhibitor composed of a morpholine fatty acid salt dispersed in steam exerts a corrosion inhibitory action on the steam pipe 5 and the condensate pipe 6 according to its effectiveness. Here, the injected morpholine fatty acid salt is decomposed by heat into morpholine and a fatty acid, and morpholine exhibits a neutralizing action, and the fatty acid exhibits a film-forming action, and thus cooperates to bring about a corrosion-inhibiting effect. .
[0025]
Thus, the steam boiler apparatus 1 is set to supply the corrosion inhibitor made of morpholine fatty acid salt into the steam pipe 5, so that it occurs in the conventional apparatus for supplying the corrosion inhibitor to the feed water. It is possible to reduce the waste of the corrosion inhibitor and the malfunction of the water level detector 14. In particular, since the steam boiler apparatus 1 is supplied with a corrosion inhibitor composed of a necessary amount of morpholine fatty acid salt from the injection apparatus 7 in accordance with the amount of steam generated in the steam boiler 3 in the steam pipe 5, morpholine The amount of the corrosion inhibitor composed of the fatty acid salt can be set more appropriately, and economical operation becomes possible. In addition, as a result of appropriately setting the usage amount of the corrosion inhibitor made of morpholine fatty acid salt in this way, the condensate recovered from the condensate pipe 6 to the water supply tank 9 becomes the corrosion inhibitor made of morpholine fatty acid salt. Since the remaining of the agent is suppressed, the quality of the water supply stored in the water supply tank 9 is unlikely to be impaired. For this reason, the feed water mixed with this condensate is unlikely to cause malfunction of the water level detector 14 when supplied to the steam boiler 3.
[0026]
Here, in the steam boiler device 1, the corrosion inhibitor made of morpholine fatty acid salt is set to be supplied into the steam pipe 5, but the chemical injection pipe 17 is connected to the condensate pipe 6, You may set so that the corrosion inhibitor which consists of a morpholine fatty acid salt may be supplied in the condensate piping 6. FIG. In this way, corrosion of the condensate pipe 6 is mainly effectively suppressed. In this case, the chemical injection pipe 17 is preferably connected immediately after the steam trap 15 in the condensate pipe 6. If it does in this way, since the corrosion inhibitor which consists of morpholine fatty acid salts can be directly supplied to condensate, a corrosion inhibitory effect can be exhibited effectively.
[0027]
Furthermore, there is also a method of pouring medicine into both the steam pipe 5 and the condensate pipe 6. For example, when the total length of the steam pipe 5 is long, a corrosion inhibitor made of a morpholine fatty acid salt is consumed in the steam pipe 5 or drain discharge means (not shown) for draining provided in the middle of the steam pipe 5 is used. ), The corrosion inhibitor made of morpholine fatty acid salt is also discharged together with the drain water, so that the corrosion inhibitor made of morpholine fatty acid salt supplied to the condensate pipe 6 may be reduced. In such a case, the corrosion of the condensate pipe 6 can be more effectively prevented by injecting into the condensate pipe 6 the amount of consumption of the corrosion inhibitor composed of the morpholine fatty acid salt consumed in the steam pipe 5. Can be suppressed.
[0028]
Next, a modification (second embodiment) of the steam boiler apparatus 1 according to the first embodiment will be described with reference to FIG. 2, the same members as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted. Now, in FIG. 2, the steam boiler device 1 includes two load devices 4 and 4. The steam pipes 5 and 5 are individually connected to the load devices 4. Each of the steam pipes 5 extends from a steam distributor (an example of a steam distributor) 19 connected to the steam pipe 5 from the steam boiler 3. The steam distributor 19 is for distributing the steam supplied from the steam boiler 3 to the steam pipes 5.
[0029]
Further, each load device 4 is provided with the condensate pipes 6 and 6 having the steam traps 15 and 15 respectively. Each condensate pipe 6 is unified and extends to the water supply tank 9. Furthermore, the chemical injection pipe 17 of the injection device 7 communicates with the vapor distributor 19.
[0030]
In the steam boiler device 1, the steam generated in the steam boiler 3 is first supplied to the steam distributor 19, then distributed to each steam pipe 5 from here, and used in each load device 4. The steam that has passed through each of the load devices 4 loses latent heat while passing through the respective condensate pipes 6 and is partially converted into condensed water, and the steam and water are separated in each steam trap 15. It becomes condensate (drain water). The condensate in each of the condensate pipes 6 joins and is then collected into the water supply tank 9 where it is mixed with makeup water from the water injection path 8 and reused as water supply to the steam boiler 3.
[0031]
During the operation of the steam boiler device 1, the chemical injection pump 18 of the injection device 7 operates based on the combustion amount information transmitted from the operation control device 13 as in the case of the first embodiment. Then, a corrosion inhibitor made of a morpholine fatty acid salt in a required amount corresponding to the combustion amount, that is, the amount of steam generated in the steam boiler 3 is supplied from the drug tank 16 into the steam distributor 19 through the drug injection pipe 17. . The corrosion inhibitor made of morpholine fatty acid salt supplied into the steam distributor 19 is distributed to the steam pipes 5 and dispersed in the steam. Therefore, in this embodiment, a corrosion inhibitor composed of a required amount of morpholine fatty acid salt is injected into each steam pipe 5 through the steam distributor 19. The corrosion inhibitor composed of a morpholine fatty acid salt dispersed in steam exerts a corrosion inhibitory action on each steam pipe 5 and each condensate pipe 6 according to its effectiveness. Here, the injected morpholine fatty acid salt is decomposed by heat into morpholine and a fatty acid, and morpholine exhibits a neutralizing action, and the fatty acid exhibits a film-forming action, and thus cooperates to bring about a corrosion-inhibiting effect. .
[0032]
Thus, since the said steam boiler apparatus 1 is set so that the corrosion inhibitor which consists of a morpholine fatty acid salt may be supplied in the said each steam piping 5 through the said steam distribution apparatus 19, said 1st Embodiment The same effect as in the case of.
[0033]
  Here, in the steam boiler device 1 according to this embodiment, the corrosion inhibitor made of morpholine fatty acid salt is supplied into the steam distributor 19, but the corrosion inhibitor made of morpholine fatty acid salt is:The steam distributor 19May be directly supplied individually to each of the steam pipes 5 branched from the above. In this case, the injection device 7 is individually arranged for each steam pipe 5. And the corrosion inhibitor which consists of a required amount of morpholine fatty acid salt corresponding to the amount of steam generated in the steam boiler 3 depends on the distribution ratio of the steam to the respective steam pipes 5 set by the steam distributor 19. The chemical injection pumps 18 of the respective injection devices 7 are set so as to be supplied to the respective steam pipes 5 while being distributed. Therefore, in the case of this modification, a corrosion inhibitor composed of a different morpholine fatty acid salt can be supplied to each steam pipe 5 according to the type of each load device 4.
[0034]
In the steam boiler apparatus 1 according to this embodiment, a corrosion inhibitor composed of a morpholine fatty acid salt may be directly supplied to the steam pipe 5 on the upstream side of the steam distributor 19. In this case, the injection device 7 is arranged with respect to the steam pipe 5. Then, the chemical injection pump 18 of each of the injection devices 7 is set so that the required amount of corrosion inhibitor composed of morpholine fatty acid salt corresponding to the amount of steam generated in the steam boiler 3 is supplied to the steam pipe 5. Set. Therefore, in the case of this modification, a corrosion inhibitor made of a necessary amount of morpholine fatty acid salt can be supplied to the steam pipe 5 according to the amount of steam of the steam boiler 3.
[0035]
There is also a method of pouring both the steam distributor 19 and the condensate pipe 6. For example, a corrosion inhibitor made of morpholine fatty acid salt is discharged together with drain water from a drain discharge means (not shown) for drain discharge provided in the steam distributor 19 so as to be supplied to each condensate pipe 6. Corrosion inhibitors composed of morpholine fatty acid salts may be reduced. In such a case, the amount of corrosion inhibitor made of morpholine fatty acid salt reduced by the steam distributor 19 is poured into each condensate pipe 6 to further corrode each condensate pipe 6. It can be effectively suppressed.
[0036]
Furthermore, although this embodiment demonstrated the case where the said each 2 load apparatuses 4 were used, it can implement similarly when the said load apparatus is three or more.
[0037]
  Next, a steam boiler apparatus according to a third embodiment will be described with reference to FIG. 3, the same members as those in FIG. 1 or FIG. 2 are denoted by the same reference numerals, and detailed description thereof is omitted. Now, in FIG. 3, the steam boiler device 1 includes the water supply devices 2 and 3 steam boilers,Steam concentrator 20 (an example of a steam concentrator) described later, The load device 4, the steam pipe 5, the condensate pipe 6, and the injection device 7 (an example of an injection unit).
[0038]
The water supply device 2 is for supplying water to the steam boilers 3, and the water supply passage 9 for supplying make-up water, the water supply tank 9 for storing make-up water from the water supply passage 8, and the water supply tank 9. The water supply passage 10 for supplying the water supply stored in the steam boiler 3 to the steam boilers 3 is mainly provided. The water supply channel 10 is branched into three individual water supply channels 21, 21, and 21 so as to individually correspond to the steam boilers 3, and the individual water supply channels 21 are stored in the water supply tank 9. The feed water pumps 11 for sending the supplied feed water toward the corresponding steam boilers 3 are provided.
[0039]
Each said steam boiler 3 is for heating the feed water supplied from the said water supply apparatus 2, and generate | occur | produces a steam, The said heating burner 12 and the said operation control apparatus 13 for heating feed water are separately provided. I have. The operation control device 13 is for setting the combustion amount in each corresponding steam boiler 3, for example, a three-position control method, more specifically, the heating burner 12 is stopped, low combustion and high It can be set at any of the three combustion positions. Here, the amount of steam generated in each steam boiler 3 corresponds to the combustion amount set by each operation control device 13. For example, in a single steam boiler 3, when the combustion amount set by the operation control device 13 is “high combustion”, assuming that the amount of steam generated in the steam boiler 3 is “10”, “low combustion” Is set to “1/2” (ie, “5”) during high combustion, and “0” is set when set to “stop”. Here, the same applies to the other steam boilers 3.
[0040]
Further, the water level detectors 14 are individually arranged in the steam boilers 3. Each of the water level detectors 14 is set so as to be able to transmit a water level signal to the corresponding water supply pump 11 of each individual water supply channel 21 via the operation control device 13, and the water supply pump 11 On / off control is performed so that the water level in each of the corresponding steam boilers 3 is maintained constant.
[0041]
The steam concentrator 20 is for collecting steam generated in the steam boilers 3, and the steam pipes 5 extending from the steam boilers 3 communicate with each other. The steam concentrating device 20 has a pressure sensor 22 for measuring the pressure of the steam supplied and collected therein, and a unit control device 23 connected to the pressure sensor 22. The number control device 23 individually sets the operation or stop of each steam boiler 3 according to the pressure measured by the pressure sensor 22, thereby adjusting the amount of steam supplied to the steam concentrating device 20. Is for. Here, the starting order of the steam boilers 3 by the number control device 23 follows a preset order.
[0042]
The load device 4 is a heat exchanger for performing required heat exchange using, for example, steam generated in each steam boiler 3. The steam pipe 5 extends from the steam concentrating device 20 and supplies steam from the steam boiler 3 to the load device 4. The condensate pipe 6 extends from the load device 4 to the water supply tank 9, and collects condensed water (condensate) obtained by condensing steam used in the load device 4 into the water supply tank 9. Is to do. The condensate pipe 6 has the steam trap 15.
[0043]
The injection device 7 includes the chemical tank 16 for storing a corrosion inhibitor made of morpholine fatty acid salt, and the chemical injection pipe 17 that connects the chemical tank 16 and the vapor concentrating device 20. The chemical injection pipe 17 has the chemical injection pump 18 for supplying a corrosion inhibitor made of morpholine fatty acid salt in the chemical tank 16 into the vapor concentrating device 20. The chemical injection pump 18 is connected to the operation control device 13 of each steam boiler 3 through the number control device 23, and the operation number and operation of each steam boiler 3 set by the number control device 23. According to the total amount of the combustion amount for each steam boiler 3 set in the control device 13, that is, according to the total amount of steam generated in each steam boiler 3, into the steam concentrating device 20. The required amount of the corrosion inhibitor composed of the morpholine fatty acid salt to be supplied is set to be adjustable. The corrosion inhibitor comprising a morpholine fatty acid salt used here is the same as in the case of the first embodiment.
[0044]
Here, the various members constituting the steam boiler device 1, in particular, the steam pipe 5 and the condensate pipe 6 are mainly formed of steel pipes.
[0045]
Next, the operation of the steam boiler apparatus 1 will be described. When operating the steam boiler device 1, makeup water is supplied from the water injection path 8 to the water supply tank 9, and the makeup water is stored in the water supply tank 9. And each said water supply pump 11 is operated and the water supply stored by the said water supply tank 9 is supplied to each said steam boiler 3 through the said water supply path 10 and each said individual water supply path 21. FIG. Each said steam boiler 3 heats feed water with the said heating burner 12, and generates a vapor | steam. The generated steam is supplied to the steam concentrating device 20 through the steam pipes 5.
[0046]
Here, when the amount of steam supplied to the steam concentrating device 20 is excessive or small compared to the required amount in the load device 4, the pressure sensor 22 detects this, and the number control device 23 detects each steam. The number of operating boilers 3 is set, and the operation control device 13 sets an individual combustion amount for each steam boiler 3.
[0047]
The steam supplied to the steam concentrating device 20 is continuously supplied to the load device 4 through the steam pipe 5 on the downstream side. The steam that has passed through the load device 4 loses its latent heat and partly changes to condensed water, and the steam and water are separated in the steam trap 15 to become condensed water (drain water). This condensate is collected into the water supply tank 9 through the condensate pipe 6, where it is mixed with makeup water from the water injection channel 8 and reused as water supply to the steam boilers 3.
[0048]
During operation of the steam boiler device 1, the operation control device 13 of each steam boiler 3 individually transmits the combustion amount of each steam boiler 3 to the number control device 23. The number control device 23 calculates the total amount of steam generated in each steam boiler 3 based on the combustion amount information transmitted from each operation control device 13, and the morpholine fatty acid corresponding to the total amount. The required amount of salt corrosion inhibitor is transmitted to the chemical injection pump 18. Thereby, the chemical injection pump 18 supplies a corrosion inhibitor made of a required amount of morpholine fatty acid salt from the chemical tank 16 to the vapor concentrating device 20 through the chemical injection pipe 17. The required amount here is, for example, when the combustion amount of all the steam boilers 3 is “high combustion”, which is three times the unit amount described in the first embodiment, When the combustion amount of the steam boiler 3 is “low combustion”, it becomes 1.5 times the unit amount.
[0049]
The corrosion inhibitor made of morpholine fatty acid salt supplied to the steam concentrator 20 as described above is dispersed in the steam supplied from the steam concentrator 20 to the steam pipe 5 on the downstream side. The corrosion inhibitor composed of a morpholine fatty acid salt dispersed in steam exerts a corrosion inhibitory action on the steam pipe 5 and the condensate pipe 6 according to its effectiveness. Here, the injected morpholine fatty acid salt is decomposed by heat into morpholine and a fatty acid, and morpholine exhibits a neutralizing action, and the fatty acid exhibits a film-forming action, and thus cooperates to bring about a corrosion-inhibiting effect. .
[0050]
Thus, since the said steam boiler apparatus 1 is set so that the corrosion inhibitor which consists of a morpholine fatty acid salt may be supplied in the said steam piping 5 via the said steam concentration apparatus 20, said 1st implementation The same effect as in the case of can be exhibited.
[0051]
In the steam boiler device 1 according to this embodiment, as described above, the corrosion inhibitor made of morpholine fatty acid salt is supplied into the steam pipe 5 through the steam concentrating device 20. The corrosion inhibitor made of salt may be directly supplied into the steam pipe 5 or may be supplied into the condensate pipe 6. In these cases, the injection device 7 is connected to the steam pipe 5 or the condensate pipe 6.
[0052]
A method of pouring both the steam concentrating device 20 and the condensate pipe 6 is also suitable. For example, a drain discharge means (not shown) for drain discharge provided in the steam concentrator 20 discharges a corrosion inhibitor made of morpholine fatty acid salt together with drain water, and is supplied to the condensate pipe 6. Corrosion inhibitors composed of morpholine fatty acid salts may be reduced. In such a case, the corrosion of the condensate pipe 6 is more effectively suppressed by injecting into the condensate pipe 6 a reduced amount of the corrosion inhibitor composed of the morpholine fatty acid salt reduced by the steam concentrator 20. can do.
[0053]
Furthermore, although this embodiment demonstrated the case where the said each three steam boilers 3 were used, the case where the said steam boiler 3 is 2 units | sets or 4 units | sets or more can be implemented similarly.
[0054]
Next, a modified example (fourth embodiment) of the steam boiler apparatus 1 according to each of the above embodiments will be described with reference to FIG. 4, the same members as those in FIGS. 1, 2, and 3 are denoted by the same reference numerals, and detailed description thereof is omitted. Now, in FIG. 4, the steam boiler device 1 includes the two load devices 4. The respective steam pipes 5 on the downstream side are individually connected to the respective load devices 4. Each of the steam pipes 5 on the downstream side extends from the steam concentrating device 20. The steam concentrator 20 used here collects the steam generated in the steam boilers 3 through the steam pipes 5 on the upstream side and the steam pipes 5 on the downstream side connected to the load devices 4. It is for distributing to.
[0055]
Further, each load device 4 is provided with each condensate pipe 6 having each steam trap 15 individually. Each condensate pipe 6 is unified and extends to the water supply tank 9.
[0056]
In the steam boiler device 1, the steam collected in the steam concentrating device 20 is distributed to the steam pipes 5 on the downstream side and used in the load devices 4. The steam that has passed through each of the load devices 4 loses latent heat, and part of the steam is converted to condensed water. In each steam trap 15, the steam and water are separated into condensate (drain water). The condensate in each condensate pipe 6 joins and is collected in the water supply tank 9 where it is mixed with makeup water from the water injection channel 8 and reused as water supply to the steam boilers 3. .
[0057]
During the operation of the steam boiler device 1, the chemical injection pump 18 of the injection device 7 is the required amount corresponding to the total amount of steam generated in each steam boiler 3 as in the case of the third embodiment. A corrosion inhibitor made of morpholine fatty acid salt is supplied from the chemical tank 16 into the vapor concentrating device 20 through the chemical injection pipe 17. The corrosion inhibitor made of morpholine fatty acid salt supplied into the steam concentrator 20 is distributed from the steam concentrator 20 to the respective steam pipes 5 on the downstream side and dispersed in the steam. The corrosion inhibitor composed of the morpholine fatty acid salt dispersed in the steam exhibits a corrosion inhibiting action corresponding to the effectiveness of each steam pipe 5 and each condensate pipe 6. Here, the injected morpholine fatty acid salt is decomposed by heat into morpholine and a fatty acid, and morpholine exhibits a neutralizing action, and the fatty acid exhibits a film-forming action, and thus cooperates to bring about a corrosion-inhibiting effect. .
[0058]
Thus, since the said steam boiler apparatus 1 is set so that the corrosion inhibitor consisting of a morpholine fatty acid salt may be supplied into each said load apparatus 4 via the said steam concentration apparatus 20, said 1st The same effects as in the embodiment can be exhibited.
[0059]
Moreover, in the steam boiler device 1 according to this embodiment, as described above, the corrosion inhibitor made of morpholine fatty acid salt is supplied into the steam pipe 5 on the downstream side through the steam concentrating device 20. The corrosion inhibitor comprising a morpholine fatty acid salt may be directly supplied into each of the steam pipes 5 on either or both of the upstream side and the downstream side, or may be supplied into the respective condensate pipes 6. . In these cases, the injection device 7 is connected to the steam pipe 5 or the condensate pipe 6 on either or both of the upstream side and the downstream side.
[0060]
There is also a method of pouring both the steam concentrating device 20 and the condensate pipe 6. For example, a drain discharge means (not shown) for drain discharge provided in the steam concentrator 20 discharges a corrosion inhibitor made of morpholine fatty acid salt together with drain water, and is supplied to the condensate pipe 6. Corrosion inhibitors composed of morpholine fatty acid salts may be reduced. In such a case, the corrosion of the condensate pipe 6 is made more effective by pouring the reduced amount of the corrosion inhibitor made of morpholine fatty acid salt that has been reduced by the steam concentrator 20 into the condensate pipe 6. Can be suppressed.
[0061]
Here, in this embodiment, the case where two load devices 4 are used has been described. However, the case where there are three or more load devices 4 can be similarly implemented.
[0062]
【The invention's effect】
As described above, according to the present invention, the corrosion inhibitor composed of a morpholine fatty acid salt can be used without waste and can be operated stably.
[Brief description of the drawings]
FIG. 1 is a schematic view of a steam boiler apparatus showing a first embodiment of the present invention.
FIG. 2 is a schematic view of a steam boiler apparatus showing a second embodiment of the present invention.
FIG. 3 is a schematic view of a steam boiler apparatus showing a third embodiment of the present invention.
FIG. 4 is a schematic view of a steam boiler apparatus showing a fourth embodiment of the present invention.
[Explanation of symbols]
        1 Steam boiler equipment
        3 Steam boiler
        4 Load device
        5 Steam piping
        6 Condensate piping
        7Injection device (injection part)
      19Steam distributor (steam distributor)
      20Steam concentrator (steam concentrator)

Claims (6)

  A steam boiler 3 that generates steam by heating feed water, a load device 4 that uses steam, a steam pipe 5 that supplies steam to the load device 4, and steam that is used in the load device 4 is condensed. A condensate pipe 6 for collecting the condensate obtained in this way and mixing it with feed water, and a corrosion inhibitor comprising a required amount of morpholine fatty acid salt in one or both of the steam pipe 5 and the condensate pipe 6 A steam boiler device, wherein the required amount is set to be adjustable according to the amount of steam generated in the steam boiler 3. . A steam boiler 3 for heating the feed water to generate steam, a plurality of load devices 4, 4... Using steam, and a plurality of steam pipes 5, 5 for supplying steam to the load devices 4. ..., a plurality of condensate pipes 6, 6, ... for collecting condensate obtained by condensing steam used in each load device 4 and mixing it with feed water, and steam from the steam boiler 3 the steam distributor 19 for distributing to each steam pipe 5 of the various load devices every four, from the one required amount of morpholine fatty acid salt into one or both of the steam pipe 5 and the respective condensate pipe 6 An injection portion 7 for injecting a corrosion inhibitor, and the injection portion 7 is set such that the required amount can be adjusted according to the amount of steam generated in the steam boiler 3. Steam boiler equipment. The said injection | pouring part 7 is set so that the corrosion inhibitor which consists of a morpholine fatty acid salt can be inject | poured into any one or both of the said steam distribution part 19 and each said condensate piping 6. The steam boiler apparatus described. A plurality of steam boilers 3, 3,... That generate steam by heating the feed water, a load device 4 that uses steam, a steam concentrator 20 that collects steam from each steam boiler 3, and the steam A steam pipe 5 for supplying the steam collected in the concentrating part 20 to the load device 4 and a condensate obtained by condensing the steam used in the load device 4 are collected and mixed with the feed water. A condensate pipe 6, and an injection part 7 for injecting a required amount of a morpholine fatty acid salt into one or both of the steam pipe 5 and the condensate pipe 6. The steam boiler apparatus is characterized in that the required amount is set to be adjustable according to the total amount of steam generated in each of the steam boilers 3. A plurality of steam boiler 3,3 to generate steam by heating feed water, ... and a plurality of load devices 4, 4 utilizing steam, ... and steam for collecting steam from said respective steam boiler 3 A concentrating unit 20 , a plurality of steam pipes 5, 5... For supplying the steam collected in the steam concentrating unit 20 to the load devices 4, and the steam used in the load devices 4 are condensed. A plurality of condensate pipes 6, 6,... For collecting the condensate obtained in this way and mixing it with feed water, and a required amount of morpholine in either or both of the steam pipes 5 and the condensate pipes 6 An injection unit 7 for injecting a corrosion inhibitor made of a fatty acid salt, and the injection unit 7 is set so that the required amount can be adjusted according to the total amount of steam generated in each of the steam boilers 3. The steam boiler apparatus characterized by being made. The said injection | pouring part 7 is set so that the corrosion inhibitor which consists of a morpholine fatty acid salt can be inject | poured into any one or both of the said steam concentration part 20 and each said condensate piping 6. The steam boiler apparatus according to claim 5.

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