Heat supply system

Abstract

The utility model relates to the technical field of internal combustion engine waste heat recovery, in particular to a heat supply system which comprises a waste heat unit, the waste heat unit comprises an internal combustion engine, a waste heat boiler and a generator, the waste heat boiler is arranged on one side of the internal combustion engine through a ventilation pipeline, and the other side of the internal combustion engine is movably connected with the generator. The steam unit comprises a high-pressure boiler; the mixing unit comprises a steam ejector, one side of the steam ejector is connected with a waste heat boiler through a ventilation pipeline, and the other side of the steam ejector is connected with a high-pressure boiler through a ventilation pipeline. The device has the advantages that low-quality waste heat boiler high-temperature steam and high-quality high-voltage electrode boiler high-temperature steam are mixed through the steam ejector and then ejected out, steam parameters capable of meeting the requirements of industrial users are obtained, and the waste heat boiler high-temperature steam generated after an internal combustion engine works is recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery of internal combustion engines, in particular to a heating system. Background Art

[0002] Currently, the operating thermal efficiency of advanced large-scale gas internal combustion engines can reach over 45%, but the exhaust gas temperature is still as high as 300-500°C. If this part of the flue gas waste heat is not utilized, it will cause huge energy waste. The traditional method of recovering the exhaust waste heat of internal combustion engines is to add a waste heat boiler and use the generated steam to generate electricity. However, due to the low parameters of the generated steam, the power generation efficiency is very low. At the same time, the equipment investment for adding a waste heat boiler power generation system is very high, and the overall economic benefits are poor.

[0003] High-voltage electrode boilers generally refer to high-voltage immersed electrode boilers, including steam-type electrode boilers and hot water-type electrode boilers. Electrode immersed boilers are mainly composed of three-phase electrodes, inner cylinder, outer cylinder, circulating water pump, feed water pump, desalted water tank, pipes and valves. The electrodes and inner cylinder adopt a symmetrical structure to form zero potential in the inner cylinder. Only the outer cylinder needs to be grounded. It has the advantages of fast start-stop speed, wide power range stepless adjustment, high steam quality (8.5Mpa, 200-300℃), simple maintenance, small installation space and high safety.

[0004] High-quality steam is generated by high-voltage electrode boilers and mixed with low-quality steam generated by internal combustion engine flue gas recovery to meet the steam needs of heat users, while improving energy efficiency by recovering the waste heat of the internal combustion engine. Utility Model Content

[0005] In view of the above-mentioned existing technical problem of waste heat of internal combustion engine flue gas, the present utility model is proposed.

[0006] The utility model aims to provide a heating system, which aims to solve the problem of utilizing and mixing high-quality steam, thereby achieving the goal of utilizing high-temperature steam from waste heat boilers.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a heating system comprising a waste heat unit, the waste heat unit comprising an internal combustion engine, a waste heat boiler and a generator, the waste heat boiler being arranged on one side of the internal combustion engine through a ventilation pipe, and the generator being movably connected to the other side of the internal combustion engine;

[0008] a steam unit, said steam unit comprising a high-pressure boiler;

[0009] The mixing unit includes a steam ejector, one side of the steam ejector is connected to a waste heat boiler via a ventilation pipe, and the other side of the steam ejector is connected to a high-pressure boiler via a ventilation pipe.

[0010] As a preferred solution of the heating system of the present invention, the waste heat unit includes at least one internal combustion engine and a waste heat boiler connected to the internal combustion engine through a ventilation pipe.

[0011] As a preferred solution of the heating system of the present invention, the high-pressure boiler is a high-pressure electrode boiler.

[0012] As a preferred solution of the heating system of the present invention, the steam ejector includes a first connection port and a second connection port, the first connection port is arranged on the upper side of the steam ejector, and the second connection port is arranged on the side of the steam ejector.

[0013] As a preferred solution of the heating system of the present invention, the waste heat boiler is connected to the first connecting port via a ventilation pipe.

[0014] As a preferred solution of the heating system of the present invention, the high-pressure boiler is connected to the second connecting port via a ventilation pipe.

[0015] As a preferred solution of the heating system of the present invention, the flue gas of the waste heat boiler and the high-pressure boiler is mixed through the steam ejector.

[0016] As a preferred solution of the heating system of the present invention, the temperature of the waste heat boiler is X°C and the pressure is YMPa.

[0017] As a preferred solution of the heating system of the present invention, the steam ejector has an ejection temperature of A°C and a pressure of BMPa.

[0018] As a preferred solution of the heating system of the present invention, the high-pressure boiler is X+A / 2°C and the pressure is Y+B / 2MPa.

[0019] The beneficial effects of the heating system of the present invention are: low-quality high-temperature steam from the waste heat boiler is mixed with high-quality high-temperature steam from the high-voltage electrode boiler through a steam ejector and then ejected, so as to obtain steam parameters that can meet the needs of industrial users, and the high-temperature steam from the waste heat boiler generated after the internal combustion engine is operated can be recovered and utilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0021] Figure 1This is a schematic diagram of the heating system in the present invention. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it designate a separate or selective embodiment that is mutually exclusive with other embodiments.

[0025] Example 1

[0026] Reference Figure 1 , which is the first embodiment of the present utility model, provides a heating system including a waste heat unit 100, a steam unit 200 and a mixing unit 300.

[0027] Preferably, the waste heat unit 100 includes an internal combustion engine 101, a waste heat boiler 102 and a generator 103. The waste heat boiler 102 is arranged on one side of the internal combustion engine 101 through a ventilation pipe, and the generator 103 is movably connected to the other side of the internal combustion engine 101. The internal combustion engine 101 performs work to enable the generator 103 to generate electricity. The large gas internal combustion engine 101 has an operating thermal efficiency of more than 45%, and the temperature of the flue gas it emits is as high as 300-500°C. The flue gas emitted by the internal combustion engine 101 heats the waste heat boiler 102, and steam parameters are generated according to the waste heat.

[0028] The steam unit 200 includes a high-pressure boiler 201 , and its purpose is to use the high-pressure boiler 201 to generate high-temperature steam. The high-temperature steam generated by the high-pressure boiler 201 has better quality than the steam generated by the waste heat boiler 102 .

[0029] The mixing unit 300 includes a steam ejector 301. One side of the steam ejector 301 is connected to the waste heat boiler 102 through a ventilation pipe, and the other side of the steam ejector 301 is connected to the high-pressure boiler 201 through a ventilation pipe. The steam ejector 301 is a prior art. The steam ejector 301 is a thermal equipment widely used in industrial production and energy utilization. It is mainly composed of a nozzle, a mixer and a diffuser. The working process can be divided into three stages: steam injection, mixing and diffusion.

[0030] During use, the flue gas emitted by the internal combustion engine 101 after work heats the waste heat boiler 102. The waste heat boiler 102 generates steam parameters through the high-temperature flue gas, and the high-pressure boiler 201 generates high-temperature steam. At the same time, the steam ejector 301 mixes the steam parameters generated by the high-temperature flue gas of the waste heat boiler 102 and the high-temperature steam generated by the high-pressure boiler 201, thereby generating steam that meets the needs of industrial users, thereby achieving the recovery and utilization of the steam from the waste heat boiler 102.

[0031] Example 2

[0032] Reference Figure 1 , which is the second embodiment of the present invention, is different from the previous embodiment in that it further includes a waste heat unit 100 including at least one internal combustion engine 101 and a waste heat boiler 102 connected to the internal combustion engine 101 through a ventilation pipe.

[0033] Preferably, the high-pressure boiler 201 is a high-pressure electrode boiler. The high-pressure electrode boiler is a prior art. The high-pressure electrode boiler generally refers to a high-pressure immersed electrode boiler, including a steam-type electrode boiler and a hot water-type electrode boiler. This embodiment preferably uses an electrode immersed boiler mainly composed of a three-phase electrode, an inner cylinder, an outer cylinder, a circulating water pump, a water feed pump, a desalted water tank, and pipes and valves. The electrode and the inner cylinder adopt a symmetrical structure to form a zero potential in the inner cylinder. Only the outer cylinder needs to be grounded. It has the advantages of fast start-stop speed, wide range of stepless power adjustment, high steam quality (8.5Mpa, 200-300℃), simple maintenance, small installation space and high safety.

[0034] Preferably, the steam injector 301 includes a first connecting port 301 a and a second connecting port 301 b . The first connecting port 301 a is disposed on the upper side of the steam injector 301 , and the second connecting port 301 b is disposed on the side of the steam injector 301 .

[0035] Furthermore, the waste heat boiler 102 is connected to the first connection port 301a through a ventilation pipe, and the high-pressure boiler 201 is connected to the second connection port 301b through a ventilation pipe. The flue gas of the waste heat boiler 102 and the high-pressure boiler 201 are mixed through the steam ejector 301. The steam of the waste heat boiler 102 enters from the first connection port 301a set on the upper side of the steam ejector 301, and the high-quality steam of the high-pressure boiler 201 enters from the second connection port 301b set on the side of the steam ejector 301, so that the two gases produce a better mixing effect.

[0036] During use, the steam from the waste heat boiler 102 enters from the first connection port 301a set on the upper side of the steam ejector 301, and the high-quality steam from the high-pressure boiler 201 enters from the second connection port 301b set on the side of the steam ejector 301, so that the two gases produce a better mixing effect, and the mixed steam reaches the steam that meets the needs of industrial users.

[0037] Example 3

[0038] Reference Figure 1 , which is the third embodiment of the present utility model. Different from the previous embodiment, it also includes a waste heat boiler 102 with a temperature of X°C and a pressure of YMPa. In this embodiment, the flue gas discharged by the internal combustion engine 101 has a temperature of 370°C and a speed of 28.2kg / s. The waste heat boiler steam generated after passing through the waste heat boiler 102 has a temperature of 240°C and a pressure of 0.8MPa.

[0039] Preferably, the steam ejector 301 has an ejection temperature of A°C and a pressure of BMPa. In this embodiment, the steam demand of industrial users is 270°C and a pressure of 0.8 MPa.

[0040] Furthermore, the high-pressure boiler 201 is X+A / 2°C and the pressure is Y+B / 2MPa. By adjusting the high-pressure boiler 201, the high-pressure boiler 201 can generate high-temperature steam at 300°C and a pressure of 3MPa to meet the needs of recycling the high-temperature flue gas of the internal combustion engine 101.

[0041] During use, the temperature of the flue gas discharged by the internal combustion engine 101 and the waste heat boiler steam data generated after passing through the waste heat boiler 102 are fixed. The final steam demand of the industrial user is determined according to the user's needs. By calculating X+A / 2℃ and the pressure being Y+B / 2MPa, the high-pressure boiler data is adjusted to meet the recovery and utilization of the high-temperature flue gas of the internal combustion engine 101.

[0042] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete elements can be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0043] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0044] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A heating system, characterized in that: include A waste heat unit (100), the waste heat unit (100) comprising an internal combustion engine (101), a waste heat boiler (102) and a generator (103), the waste heat boiler (102) being arranged on one side of the internal combustion engine (101) via a ventilation pipe, and the generator (103) being movably connected to the other side of the internal combustion engine (101); A steam unit (200), the steam unit (200) comprising a high-pressure boiler (201); A mixing unit (300) includes a steam ejector (301), one side of the steam ejector (301) is connected to a waste heat boiler (102) via a ventilation pipe, and the other side of the steam ejector (301) is connected to a high-pressure boiler (201) via a ventilation pipe.

2. The heating system according to claim 1, wherein: The waste heat unit (100) includes at least one internal combustion engine (101) and a waste heat boiler (102) connected to the internal combustion engine (101) via a ventilation pipe.

3. The heating system according to claim 1 or 2, characterized in that: The high-pressure boiler (201) is a high-pressure electrode boiler.

4. The heating system according to claim 3, wherein: The steam injector (301) comprises a first connection port (301a) and a second connection port (301b), wherein the first connection port (301a) is arranged on the upper side of the steam injector (301), and the second connection port (301b) is arranged on the side of the steam injector (301).

5. The heating system according to claim 4, wherein: The waste heat boiler (102) is connected to the first connection port (301a) via a ventilation pipe.

6. The heating system according to claim 5, wherein: The high-pressure boiler (201) is connected to the second connection port (301b) via a ventilation pipe.

7. The heating system according to claim 6, wherein: The flue gas of the waste heat boiler (102) and the flue gas of the high-pressure boiler (201) are mixed through the steam ejector (301).

8. The heating system according to claim 2 or 7, characterized in that: The temperature of the waste heat boiler (102) is X°C and the pressure is YMPa.

9. The heating system according to claim 8, wherein: The steam ejector (301) has an ejection temperature of A°C and a pressure of BMPa.

10. The heating system according to claim 9, wherein: The temperature of the high-pressure boiler (201) is X+A / 2°C and the pressure is Y+B / 2MPa.

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