CN201836851U - Waste heat boiler - Google Patents
Waste heat boiler Download PDFInfo
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- CN201836851U CN201836851U CN2010205385243U CN201020538524U CN201836851U CN 201836851 U CN201836851 U CN 201836851U CN 2010205385243 U CN2010205385243 U CN 2010205385243U CN 201020538524 U CN201020538524 U CN 201020538524U CN 201836851 U CN201836851 U CN 201836851U
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Abstract
The utility model discloses a waste heat boiler which comprises an air inlet device, a heat exchanging device and an air outlet device. The air inlet device, the heat exchanging device and the air outlet device are installed in a cylinder body of the boiler; the heat exchanging device consists of U-shaped heat exchanging pipes which are arranged side by side, and the two ends of each U-shaped heat exchanging pipe are respectively connected in parallel on the air inlet device and the air outlet device. The waste heat boiler is characterized in that: the air inlet device comprises an air inlet gathering pipe and an inlet protecting pipe connected with the air inlet gathering pipe; the air outlet device comprises an air outlet gathering pipe and a process air outlet pipe connected with the air outlet gathering pipe; as a fire-resistant heat insulation layer is arranged outside the inlet protecting pipe, the inlet protecting pipe is isolated from boiler water in the cylinder body; and the U-shaped heat exchanging pipes, the air inlet gathering pipe and the air outlet gathering pipe are all immersed into the boiler water. The beneficial effects of the waste heat boiler are as follows: the waste heat boiler lowers the temperature of the heat exchanging pipes and the gathering pipes, reduces the stress of temperature difference and can effectively avoid the tendency of heat fatigue of a welding seam; air at an inlet and an outlet is completely separated by the two gathering pipes, which prevents high-temperature air from taking shortcuts; moreover, the normal service life of equipment is greatly prolonged and economic benefits are increased.
Description
Technical field
The utility model patent relates to a kind of heat transmission equipment, is a kind of waste heat boiler specifically.
Background technology
Referring to Fig. 5, in the waste heat reclaiming process of natural gas dry method (ferrimanganic+zinc oxide) desulfurization, two sections conversions of steam under pressure, transforming waste heat boiler is key equipment (its structure is seen Fig. 4), the boiler heat-exchanger structure is that tube sheet adds " U " type tubular construction, tube sheet is isolated into burner, two parts of stove tail with the boiler internal space, air inlet component is positioned at the burner part, and environment temperature is very high; Heat exchanger components is positioned at the stove portion, is immersed in the boiler water, and temperature is low.This structure for alleviating the weld seam heat fatigue, prevents that weld seam from breaking under hot conditions, generally be the weld seam of separating high temperature, low temperature (after the heat exchange) gas and protection tube sheet and tube sheet and heat exchanger tube by pouring into a mould fire-resistant material heat insulation on tube sheet, reaching simultaneously.But because tube plate thickness is big, the plasticity of flame retardant coating is poor, the inefficacy that comes off easily when tube sheet flame retardant coating and sealing material break, will cause high-temperature gas " short circuit ", heat exchange efficiency reduces, boiler duty reduces, and the process gas temperature of outlet surpasses design temperature, and the life cycle of waste heat boiler is short, generally have only 6～8 months, must repair refractory insulating layer again.
Summary of the invention
The purpose of this utility model provides two sections conversion waste heat boilers of a kind of stable performance, heat exchange efficiency height, long service life, the above-mentioned defective that the waste heat boiler that overcoming has tube sheet originally exists.
The realization technical solution adopted in the utility model is:
A kind of waste heat boiler, comprise housing, be installed on process gas inlet duct, heat-exchanger rig and process gas air-out apparatus in the housing, described heat-exchanger rig is many U-shaped heat exchanger tubes arranged side by side, have boiler water water inlet and steam (vapor) outlet on the housing, steam (vapor) outlet is positioned at case top; Described process gas inlet duct is made up of inlet manifold and connected air inlet gas distribution pipe, and the air inlet gas distribution pipe is positioned at the enclosure interior space, and the inlet manifold passes through housing, and is welded on the housing; Described process gas air-out apparatus is made up of give vent to anger house steward and the connected collecting pipe of giving vent to anger, and the collecting pipe of giving vent to anger is positioned at the enclosure interior space, and the house steward that gives vent to anger passes through housing, and is welded on the housing; The two ends of all U-shaped heat exchanger tubes parallel connection respectively are welded on the air inlet gas distribution pipe and give vent to anger on the collecting pipe.
Described inlet manifold's outer wall is coated with refractory protection; This refractory protection is two-layer composite protection layer, and internal layer is the stainless steel sleeve pipe, and skin is nonmetal refractory masses.
The beneficial effects of the utility model:
1. owing to there is not tube sheet; be an overall space in the stove, all parts all are immersed in the boiler water, have a narrow range of temperature; effectively avoided the heat fatigue of weld seam; except that the inlet manifold, remaining part need not lay the refractory heat-insulating protective layer, thereby has reduced the maintenance probability that brings because of the damage of refractory heat-insulating protective layer; prolonged the life cycle of boiler; at least reduce stop frequency 2～3 times every year, calculate, had a net increase of benefit in 1 year: 247.32 ten thousand yuan by 4.5 ten thousand tons of/year synthetic ammonia installations.Comprising: 435 tons of synthetic ammonia are once produced in stopping production in a year less, 21.7 ten thousand yuan (by 500 yuan/NH3 profit) of meter loss, natural gas 210,000 Nm3 because of the start-stop car consumes count 23.1 ten thousand yuan; Electricity 180,000 KWh count 6.12 ten thousand yuan.No standby useless pot fuse can be saved 50,000 yuan of investments, 55.92 ten thousand yuan of the direct losses that at every turn stop production.19140 tons of voluminous steam were worth 191.40 ten thousand yuan (steam: about 100 yuan/ton), obvious economic by 330 day working day in 1 year.
2. avoided high-temperature gas " short circuit ", heat exchange efficiency, steam production are continual and steady, see Table 1.
Before and after implementing, table 1 transforms useless pot steam production contrast table
| Project | Before the enforcement | After the enforcement | Remarks |
| Steam average product (t/tNH 3） | 2.2 | 2.6 | Data are the ratio of each useless pot accumulative total steam production and hydrazine yield before improving |
3. increased the volume space of boiler water, under the situation that obtains equal steam production, the physical dimension that can dwindle boiler shell reduces the housing materials, reduces the boiler manufacturing cost.
Describe the utility model in detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is that the utility model transforms the boiler structure schematic diagram.
Fig. 2 is that the utility model transforms the boiler left view.
Fig. 3 is that the utility model transforms boiler B-B view.
Fig. 4 is a partial structurtes schematic diagram before heat exchange boiler changes.
Fig. 5 transforms Boiler Steam system flow sketch.
Code name is represented among the figure: 1-process gas inlet manifold; 2-refractory insulating layer; 3-process gas house steward that gives vent to anger; 4-process gas collecting pipe of giving vent to anger, 5-heat exchanger tube, 6-housing, 7-steam (vapor) outlet; 8-boiler water water inlet; 9-process gas air inlet gas distribution pipe; 10-process gas and boiler water sealing gasket; 11-boiler water is revealed sealing gasket.
The specific embodiment
Referring to Fig. 1, Fig. 2, Fig. 3: this waste heat boiler comprises housing 6, process gas inlet duct, heat-exchanger rig and process gas air-out apparatus are installed in the housing 6, described heat-exchanger rig is many U-shaped heat exchanger tubes 5 arranged side by side, have boiler water water inlet 8 and steam (vapor) outlet 7 on the housing 6, steam (vapor) outlet 7 is positioned at housing 6 tops, and boiler water water inlet 8 is positioned at housing 6 bottoms.The process gas inlet duct is made up of inlet manifold 1 and connected air inlet gas distribution pipe 9, and air inlet gas distribution pipe 9 is positioned at housing 6 inner spaces, and inlet manifold 1 passes through housing 6, and is welded on the housing 6.The process gas air-out apparatus is made up of give vent to anger house steward 3 and the connected collecting pipe 4 of giving vent to anger, and the collecting pipe 4 of giving vent to anger is positioned at housing 6 inner spaces, and the house steward 3 that gives vent to anger passes through housing 6, and is welded on the housing 6.The two ends of all U-shaped heat exchanger tubes 5 parallel connection respectively are welded on the air inlet gas distribution pipe 9 and the collecting pipe 4 of giving vent to anger.
Inlet manifold 1 outer wall is coated with refractory protection 2(refractory insulating layer); This refractory protection is two-layer composite protection layer, and internal layer is the stainless steel sleeve pipe, and skin is nonmetal refractory masses.Effect is protection entrance point housing and prevents heat loss; it does not contact with heat exchanger tube 5; can or not come off and cause heat exchanger tube 5 and heat exchanger tube weld seam to damage because of flame retardant coating cracking; and the outside major part of its flame retardant coating all is immersed in the boiler water, and flame retardant coating has been played the certain protection effect.
Process gas is given vent to anger, and house steward 3 is furnished with process gas and boiler water sealing gasket 10 and boiler water is revealed sealing gasket 11.
The course of work of this boiler:
Add boiler water from boiler water water inlet 8, height of water level reaches setting, and at this moment, furnace interior spare is not all had by water logging.The high-temperature technology gas that secondary reformer comes enters air inlet gas distribution pipe 9 through intake header 1, enters each U-shaped heat exchanger tube 5 respectively, with the boiler water heat exchange, enters the collecting pipe 4 of giving vent to anger again and converges, after house steward's 3 outflows of giving vent to anger; Boiler water is heated vaporization, becomes steam, flows out from steam (vapor) outlet 7, is sent to the user.
Claims (3)
1. waste heat boiler, comprise housing, be installed on process gas inlet duct, heat-exchanger rig and process gas air-out apparatus in the housing, described heat-exchanger rig is many U-shaped heat exchanger tubes arranged side by side, have boiler water water inlet and steam (vapor) outlet on the housing, steam (vapor) outlet is positioned at case top; It is characterized in that: described process gas inlet duct is made up of inlet manifold and connected air inlet gas distribution pipe, and the air inlet gas distribution pipe is positioned at the enclosure interior space, and the inlet manifold passes through housing, and is welded on the housing; Described process gas air-out apparatus is made up of give vent to anger house steward and the connected collecting pipe of giving vent to anger, and the collecting pipe of giving vent to anger is positioned at the enclosure interior space, and the house steward that gives vent to anger passes through housing, and is welded on the housing; The two ends of all U-shaped heat exchanger tubes parallel connection respectively are welded on the air inlet gas distribution pipe and give vent to anger on the collecting pipe.
2. waste heat boiler according to claim 1 is characterized in that: described inlet manifold's outer wall is coated with refractory protection.
3. waste heat boiler according to claim 2 is characterized in that: described refractory protection is two-layer composite protection layer, and internal layer is the stainless steel sleeve pipe, and skin is nonmetal refractory masses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205385243U CN201836851U (en) | 2010-09-21 | 2010-09-21 | Waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205385243U CN201836851U (en) | 2010-09-21 | 2010-09-21 | Waste heat boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201836851U true CN201836851U (en) | 2011-05-18 |
Family
ID=44006958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205385243U Expired - Lifetime CN201836851U (en) | 2010-09-21 | 2010-09-21 | Waste heat boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201836851U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103574568A (en) * | 2012-07-27 | 2014-02-12 | 石家庄工大化工设备有限公司 | Substitute natural gas reaction heat recovery device |
-
2010
- 2010-09-21 CN CN2010205385243U patent/CN201836851U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103574568A (en) * | 2012-07-27 | 2014-02-12 | 石家庄工大化工设备有限公司 | Substitute natural gas reaction heat recovery device |
| CN103574568B (en) * | 2012-07-27 | 2016-03-02 | 石家庄工大化工设备有限公司 | The reaction heat retracting device of coal preparing natural gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110518 |
|
| CX01 | Expiry of patent term |